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this is information on a product in full production. june 2012 doc id 11110 rev 12 1/31 1 stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 5-pin supervisor with watchdog timer and push-button reset datasheet ? production data features precision v cc monitoring of 5, 3.3, 3, or 2.5 v power supplies rst outputs (active low, push-pull or open drain) rst outputs (active high, push-pull) reset pulse width of 1.4 ms, 200 ms and 240 ms (typ.) watchdog timeout period of 1.6 s (typ.) manual reset input (mr ) low supply current - 3 a (typ.) guaranteed rst (rst) assertion down to v cc = 1.0 v operating temperature: ?40 to +85 c (industrial grade) rohs compliance lead-free components are compliant with the rohs directive sot23-5 (wy) table 1. device summary part number watchdog input manual reset input reset output active low (push-pull) active high (push-pull) active low (open drain) stm6321 ??? stm6322 ??? stm6821 ?? ? stm6822 ?? ? stm6823 ??? stm6824 ??? stm6825 ??? www.st.com
contents stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 2/31 doc id 11110 rev 12 contents 1 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1.1 active low, push-pull reset output (rst ) - 6823/6824/6825 . . . . . . . . . . . 7 1.1.2 active low, open drain reset output (rst ) - stm6321/6322/6822 . . . . . . 7 1.1.3 push-button reset input (mr ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1.4 watchdog input (wdi) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1.5 active high reset output (rst) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.1 reset output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.2 open drain rst output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3 push-button reset input (stm6322/6821/6822/6823/6825) . . . . . . . . . . . 11 2.4 watchdog input (stm6321/6821/6822/6823/6824) . . . . . . . . . . . . . . . . . 11 2.5 applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.5.1 watchdog input current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.5.2 ensuring a valid reset output down to v cc = 0 v . . . . . . . . . . . . . . . . . . 11 2.6 interfacing to microprocessors with bidirectional reset pins . . . . . . . . . . . 12 3 typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5 dc and ac parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 7 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 8 part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 list of tables doc id 11110 rev 12 3/31 list of tables table 1. device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 table 2. signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 table 3. pin functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 4. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 table 5. operating and ac measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 table 6. dc and ac characteristic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 table 7. sot23-5 ? 5-lead small outline transistor package mechanical data. . . . . . . . . . . . . . . . . 25 table 8. carrier tape dimensions for sot23-5 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 table 9. ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 table 10. marking description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 table 11. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
list of figures stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 4/31 doc id 11110 rev 12 list of figures figure 1. logic diagram (stm6821/6822/6823) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 2. logic diagram (stm6321/6322/6824/6825) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 3. stm6822/6823 sot23-5 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 4. stm6821 sot23-5 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 5. stm6322/6825 sot23-5 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 6. stm6321/6824 sot23-5 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 7. block diagram (stm6821/6822/6823) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 figure 8. block diagram (stm6321/6824) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 figure 9. block diagram (stm6322/6825) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 figure 10. hardware hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 figure 11. stm6321/6322/6822 open drain rst output with multiple supplies . . . . . . . . . . . . . . . . . 10 figure 12. ensuring rst valid to v cc = 0, (active low push-pull outputs) . . . . . . . . . . . . . . . . . . . . . . 12 figure 13. ensuring rst valid to v cc = 0, (active high, push-pull outputs) . . . . . . . . . . . . . . . . . . . . 12 figure 14. interfacing to microprocessors with bidirectional reset i/o . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 15. v cc -to-reset output delay vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 16. supply current vs. temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 17. mr -to-reset output delay vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 18. normalized power-up t rec vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 19. normalized reset threshold voltage vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 20. normalized power-up watchdog timeout period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 21. voltage output low vs. i sink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6 figure 22. voltage output high vs. i source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 23. maximum transient duration vs. reset threshold overdrive . . . . . . . . . . . . . . . . . . . . . . . . . 17 figure 24. ac testing input/output waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 figure 25. mr timing waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 figure 26. watchdog timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 figure 27. sot23-5 ? 5-lead small outline transistor package mechanical drawing . . . . . . . . . . . . . . 25 figure 28. carrier tape for sot23-5 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 description doc id 11110 rev 12 5/31 1 description the stm6xxx supervisors are self-contained devices which provide microprocessor supervisory functions. a precision voltage reference and comparator monitors the v cc input for an out-of-tolerance condition. when an invalid v cc condition occurs, the reset output (rst ) is forced low (or high in the case of rst). these devices also offer a watchdog timer (except for stm6322/6825) and/or a push-button (mr ) reset input. these devices are available in a standard 5-pin sot23 package. figure 1. logic diagram (stm6821/6822/6823) 1. for stm6821 only. figure 2. logic diagram (stm6321/6322/6824/6825) 1. for stm6321/6824. table 2. signal names name function mr push-button reset input wdi watchdog input rst active low reset output rst active high reset output v cc supply voltage v ss ground ai09128 v cc stm6xxx v ss rst (rst) (1) wdi mr ai09129 v cc stm6xxx v ss rst rst (wdi) (1) mr
description stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 6/31 doc id 11110 rev 12 figure 3. stm6822/6823 sot23-5 connections 1. open drain for stm6822. figure 4. stm6821 sot23-5 connections 1. push-pull only. figure 5. stm6322/6825 sot23-5 connections 1. open drain for stm6322. 2. push-pull only. figure 6. stm6321/6824 sot23-5 connections 1. open drain for stm6321. 2. push-pull only. 1 wdi rst (1) v cc mr v ss ai09130a sot23-5 2 3 4 5 1 wdi rst (1) v cc mr v ss ai12285 sot23-5 2 3 4 5 1 v cc v ss ai09131a sot23-5 2 3 4 5 mr rst (1) rst (2) 1 v cc v ss ai12286 sot23-5 2 3 4 5 wdi rst (1) rst (2)
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 description doc id 11110 rev 12 7/31 1.1 pin descriptions 1.1.1 active low, push-pull reset output (rst ) - 6823/6824/6825 pulses low when triggered, and stays low whenever v cc is below the reset threshold or when mr is a logic low. it remains low for t rec after either v cc rises above the reset threshold, the watchdog triggers a reset, or mr goes from low to high. 1.1.2 active low, open drain reset output (rst ) - stm6321/6322/6822 pulses low when triggered, and stays low whenever v cc is below the reset threshold or when mr is a logic low. it remains low for t rec after either v cc rises above the reset threshold, the watchdog triggers a reset, or mr goes from low to high. connect a pull-up resistor to supply voltage. 1.1.3 push-button reset input (mr ) a logic low on mr asserts the reset output. reset remains asserted as long as mr is low and for t rec after mr returns high. this active low input has an internal 52 k pull-up. it can be driven from a ttl or cmos logic line, or shorted to ground with a switch. leave open if unused. 1.1.4 watchdog input (wdi) if wdi remains high or low for at least 1.6 s, the internal watchdog timer expires and reset is asserted. the internal watchdog timer clears while reset is asserted or when wdi sees a rising or falling edge. the watchdog function can be disabled if wdi is left unconnected or is connected to a tristate buffer output. 1.1.5 active high reset output (rst) active high, push-pull reset output; inverse of rst . table 3. pin functions pin name function stm6822 stm6823 stm6821 stm6321 stm6824 stm6322 stm6825 1?1 1rst active low reset output 33?4mr push-button reset input 4 4 4 ? wdi watchdog input ? 1 3 3 rst active high reset output 5555v cc supply voltage 2222v ss ground
description stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 8/31 doc id 11110 rev 12 figure 7. block diagram (stm6821/6822/6823) 1. push-pull for stm6823, open drain for stm6822. 2. active high (push-pull) for stm6821. figure 8. block diagram (stm6321/6824) 3. active low (open drain) for stm6321, active low (push-pull) for stm6824. 4. push-pull only. figure 9. block diagram (stm6322/6825) 1. active low (open drain) for stm6322, active low (push-pull) for stm6825. 2. push-pull only. !)6 6 234 234234 7!4#($/' 4)-%2 7$) transitional detector #/-0!2% t rec generator 6 ## 7$) -2 6 ## !6 6 234 234 7!4#($/' 4)-%2 7$) transitional detector #/-0!2% t rec generator 6 ## 7$) 234 !)6 6 234 234 #/-0!2% t rec generator 6 ## -2 234 6 ##
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 description doc id 11110 rev 12 9/31 figure 10. hardware hookup 1. for stm6321/6821/6822/6823/6824. 2. for stm6322/6821/6822/6823/6825. 3. for stm6821/ (rst output only). 4. for stm6321/6322/6824/6825 (both rst and rst outputs). !)6 6 ## 6 ## -2 34-888 7$) 234234 234 4omicroprocessorreset &rommicroprocessor 0ush button 4omicroprocessorreset
operation stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 10/31 doc id 11110 rev 12 2 operation 2.1 reset output the stm6xxx supervisor asserts a reset signal to the mcu whenever v cc goes below the reset threshold (v rst ), a watchdog timeout occurs, or when the push-button reset input (mr ) is taken low. reset is guaranteed valid for v cc < v rst down to v cc =1 v for t a = 0 to 85 c. during power-up, once v cc exceeds the reset threshold an internal timer keeps reset low for the reset timeout period, t rec . after this interval reset is de-asserted. each time rst is asserted, it stays low for at least the reset timeout period (t rec ). any time v cc goes below the reset threshold the internal timer clears. the reset timer starts when v cc returns above the reset threshold. 2.2 open drain rst output the stm6321/6322/6822 have an active low, open drain reset output. this output structure will sink current when rst is asserted. connect a pull-up resistor from rst to any supply voltage up to 6 v (see figure 11 ). select a resistor value large enough to register a logic low, and small enough to register a logic high while supplying all input current and leakage paths connected to the reset output line. a 10 k pull-up resistor is sufficient in most applications. figure 11. stm6321/6322/6822 open drain rst output with multiple supplies 1. stm6322/6822. 2. stm6321/6822. 3. stm6321/6322. !)6 34-888 234 -2 7$) 234 '.$ 6 ## 6system 6 6
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 operation doc id 11110 rev 12 11/31 2.3 push-button reset input (stm6322/6821/6822/6823/6825) a logic low on mr asserts reset. reset remains asserted while mr is low, and for t rec (see figure 25 on page 19 ) after it returns high. the mr input has an internal 52 k pull-up resistor, allowing it to be left open if not used. this input can be driven with ttl/cmos-logic levels or with open drain/collector outputs. connect a normally open momentary switch from mr to gnd to create a manual reset function; external debounce circuitry is not required. if mr is driven from long cables or the device is used in a noisy environment, connect a 0.1 f capacitor from mr to gnd to provide additional noise immunity. mr may float, or be tied to v cc when not used. 2.4 watchdog input (stm6321/6821/6822/6823/6824) the watchdog timer can be used to detect an out-of-control mcu. if the mcu does not toggle the watchdog input (wdi) within t wd (1.6 sec), the reset is asserted. the internal watchdog timer is cleared by either: 1. a reset pulse, or 2. by toggling wdi (high to low or low to high), which can detect pulses as short as 50 ns. the timer remains cleared and does not count for as long as reset is asserted. as soon as reset is released, the timer starts counting. note: the watchdog function may be disabled by floating wdi or tristating the driver connected to wdi. when tristated or disconnected, the maximum allowable leakage current is 10 a and the maximum allowable load capacitance is 200 pf. 2.5 applications information 2.5.1 watchdog input current the wdi input is internally driven through a buffer and series resistor from the watchdog counter. for minimum watchdog input current (minimum overall power consumption), leave wdi low for the majority of the watchdog timeout period. when high, wdi can draw as much as 160 a. pulsing wdi high at a low duty cycle will reduce the effect of the large input current. when wdi is left unconnected, the watchdog timer is serviced within the watchdog timeout period by a low-high-low pulse from the counter chain. 2.5.2 ensuring a valid reset output down to v cc =0 v the stm6xxx supervisors are guaranteed to operate properly down to v cc = 1 v. in applications that require valid reset levels down to v cc = 0, a pull-down resistor to active low outputs (push/pull only, see figure 12 on page 12 ) and a pull-up resistor to active high outputs (push/pull only, see figure 13 on page 12 ) will ensure that the reset line is valid while the reset output can no longer sink or source current. this scheme does not work with the open drain outputs of the stm6321/6322/6822. the resistor value used is not critical, but it must be large enough not to load the reset output when v cc is above the reset threshold. for most applications, 100 k is adequate.
operation stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 12/31 doc id 11110 rev 12 figure 12. ensuring rst valid to v cc = 0, (active low push-pull outputs) figure 13. ensuring rst valid to v cc = 0, (active high, push-pull outputs) 1. this configuration does not work on open drain outputs of the stm6321/6322/6822. 2.6 interfacing to microprocessors with bidirectional reset pins microprocessors with bidirectional reset pins can contend with the stm6321 / 6322 / 6821 / 6822 / 6823 / 6824 / 6825 reset output. for example, if the reset output is driven high and the microprocessor wants to pull it low, signal contention will result. to prevent this from occurring, connect a 4.7 k resistor between the reset output and the microprocessor?s reset i/o as in figure 14 . figure 14. interfacing to microprocessors with bidirectional reset i/o ai09138 stm6xxx rst gnd v cc v cc r1 ai09139 stm6xxx rst gnd v cc v cc r1 !)6 34-888 234 '.$ 6 ## -icroprocessor 234 "ufferedresettoother systemcomponents '.$ 6 ##
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 typical operating charac- doc id 11110 rev 12 13/31 3 typical operating characteristics figure 15. v cc -to-reset output delay vs. temperature figure 16. supply current vs. temperature !)6 n n 6 ## 6 6 ## 6 !)6 n n
typical operating characteristics stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, 14/31 doc id 11110 rev 12 figure 17. mr -to-reset output delay vs. temperature figure 18. normalized power-up t rec vs. temperature !)6 n n !)6 n n
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 typical operating charac- doc id 11110 rev 12 15/31 figure 19. normalized reset threshold voltage vs. temperature figure 20. normalized power-up watchdog timeout period !)6 n n !)6 n n
typical operating characteristics stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, 16/31 doc id 11110 rev 12 figure 21. voltage output low vs. i sink figure 22. voltage output high vs. i source 6 ## 6 !)6 !)6 6 ## 6
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 typical operating charac- doc id 11110 rev 12 17/31 figure 23. maximum transient duration vs. reset threshold overdrive !)6 3 : ,
maximum ratings stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 18/31 doc id 11110 rev 12 4 maximum ratings stressing the device above the rating listed in table 4: absolute maximum ratings may cause permanent damage to the device. these are stress ratings only and operation of the device at these or any other conditions above those indicated in table 5: operating and ac measurement conditions of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. refer also to the stmicroelectronics ? sure program and other relevant quality documents. table 4. absolute maximum ratings symbol parameter value unit t stg storage temperature (v cc off) ?55 to 150 c t sld (1) 1. reflo w at peak temperature of 260 c (total thermal budget not to exceed 245 c for greater than 30 seconds) . lead solder temperature for 10 seconds 260 c v io input or output voltage ?0.3 to v cc + 0.3 v v cc supply voltage ?0.3 to 7.0 v i o output current 20 ma p d power dissipation 320 mw
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 dc and ac parameters doc id 11110 rev 12 19/31 5 dc and ac parameters this section summarizes the operating measurement conditions, and the dc and ac characteristics of the device. the parameters in table 6: dc and ac characteristic , are derived from tests performed under the measurement conditions summarized in table 5: operating and ac measurement conditions . designers should check that the operating conditions in their circuit match the operating conditions when relying on the quoted parameters. figure 24. ac testing input/output waveforms figure 25. mr timing waveform 1. rst for stm6322/6821/6825. table 5. operating and ac measurement conditions parameter stm6xxx unit v cc supply voltage 1.0 to 5.5 v ambient operating temperature (t a ) ?40 to 85 c input rise and fall times 5ns input pulse voltages 0.2 to 0.8 v cc v input and output timing ref. voltages 0.3 to 0.7 v cc v !)6 6 ## 6 ## 6 ## 6 ## !)6 234 -2 t -,2, t rec t -,-(
dc and ac parameters stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 20/31 doc id 11110 rev 12 figure 26. watchdog timing !)6 234 7$) 6 ## t rec t 7$
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 package mechanical data doc id 11110 rev 12 21/31 6 package mechanical data table 6. dc and ac characteristic sym- bol alter- native description test condition (1) min. typ. max. unit v cc operating voltage 1.2 (2) 5.5 v i cc v cc supply current (mr and wdi unconnected) t/s/r/z/y (v cc < 3.6 v) 4 12 a l/m (v cc < 5.5 v) 6 17 a v cc supply current (mr unconnected; stm6322/6825) t/s/r/z/y (v cc < 3.6 v) 3 8 a l/m (v cc < 5.5 v) 3 12 a i li input leakage current 0 v = v in = v cc ?1 +1 a input leakage current (wdi) (3) wdi = v cc , time average 120 160 a wdi = gnd, time average ?20 ?15 a i lo open drain reset output leakage current v cc > v rst , reset not asserted ?1 +1 a v ih input high voltage (mr ) v rst > 4.0 v 2.0 v v rst < 4.0 v 0.7 v cc v v ih input high voltage (wdi) (4) v rst (max.) < v cc < 5.5 v 0.7 v cc v v il input low voltage (mr ) v rst > 4.0 v 0.8 v v rst < 4.0 v 0.3 v cc v v il input low voltage (wdi) (4) v rst (max.) < v cc < 5.5 v 0.3 v cc v v ol output low voltage (rst ; push-pull or open drain) v cc 1.0 v, i sink = 50 a, reset asserted 0.3 v v cc 1.2 v, i sink = 100 a, reset asserted 0.3 v v cc 2.7 v, i sink = 1.2 ma, reset asserted 0.3 v v cc 4.5 v, i sink = 3.2 ma, reset asserted 0.4 v output low voltage (rst; push-pull only) v cc 2.7 v, i sink = 1.2 ma, reset not asserted 0.3 v v cc 4.5 v, i sink = 3.2 ma, reset not asserted 0.4 v
package mechanical data stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 22/31 doc id 11110 rev 12 v oh output high voltage (rst ) v cc 2.7 v, i source = 500 a, reset not asserted 0.8 v cc v v cc 4.5 v, i source = 800 a , reset not asserted 0.8 v cc v output high voltage (rst) v cc 1.0 v, i source = 1 a, reset asserted (0 c to 85 c) 0.8 v cc v v cc 1.5 v, i source = 100 a, reset asserted 0.8 v cc v v cc 2.55 v, i source = 500 a, reset asserted 0.8 v cc v v cc 4.25 v, i source = 800 a, reset asserted 0.8 v cc v reset thresholds v rst (5) reset threshold stm6xxxl 25 c 4.561 4.630 4.699 v ?40 to 85 c 4.514 4.746 v stm6xxxm 25 c 4.314 4.390 4.446 v ?40 to 85 c 4.270 4.490 v stm6xxxt 25 c 3.040 3.080 3.110 v ?40 to 85 c 3.000 3.150 v stm6xxxs 25 c 2.890 2.930 2.960 v ?40 to 85 c 2.857 3.000 v stm6xxxr 25 c 2.590 2.630 2.660 v ?40 to 85 c 2.564 2.696 v stm6xxxz 25 c 2.266 2.300 2.335 v ?40 to 85 c 2.243 2.358 v stm6xxxy 25 c 1.970 2.000 2.030 v ?40 to 85 c 1.950 2.050 v reset threshold hysteresis l/m versions 10 mv t/s/r/z/y versions 5 mv v cc to rst delay (v rst ? v cc = 100 mv, v cc falling at 1 mv/s) 20 s t rec (6) reset pulse width a11.42ms blank 140 200 280 ms j 240 360 480 ms table 6. dc and ac characteristic (continued) sym- bol alter- native description test condition (1) min. typ. max. unit
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 package mechanical data doc id 11110 rev 12 23/31 reset threshold temperature coefficient 40 ppm/ c push-button reset input t mlmh t mr mr pulse width 1 s t mlrl t mrd mr to rst output delay 500 ns mr glitch immunity 100 ns mr pull-up resistor 35 52 75 k watchdog timer t wd (6) watchdog timeout period 1.12 1.60 2.24 s wdi pulse width (7) v cc 3.0 v 50 ns 1. valid for ambient operating temperature: t a = ?40 to 85 c; v cc = 4.5 to 5.5 v for ?l/m? versions; v cc = 2.7 to 3.6 v for ?t/s/r? versions; and v cc = 1.2 to 2.75 v for ?z/y? version (except where noted). 2. v cc (min.) = 1.0 v for t a = 0 to +85 c. 3. wdi input is designed to be driven by a three-state output device. to float wdi, the ?high-impedance mode? of the output device must have a maximum leakage current of 10 a and a maximum output capacitance of 200 pf. the output device must also be able to source and sink at least 200 a when active. 4. wdi is internally serviced within the watchdog period if wdi is left unconnected. 5. the leakage current measured on the rst pin is tested with the reset asserted (output high impedance). 6. other t rec and watchdog timings are offered. minimum order quantities may apply. contact local sales office for availability. 7. for v cc < 3.0 v, t wd (min.) = 100 ns. table 6. dc and ac characteristic (continued) sym- bol alter- native description test condition (1) min. typ. max. unit
package mechanical data stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 24/31 doc id 11110 rev 12 7 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack specifications, grade definitions and product status are available at: www.st.com . ecopack is an st trademark.
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 package mechanical data doc id 11110 rev 12 25/31 figure 27. sot23-5 ? 5-lead small outline transistor package mechanical drawing 1. drawing is not to scale. table 7. sot23-5 ? 5-lead small outline transistor package mechanical data symbol dimensions mm inches typ. min. max. typ. min. max. a 1.20 0.90 1.45 0.047 0.035 0.057 a1 0.15 0.006 a2 1.05 0.90 1.30 0.041 0.035 0.051 b 0.40 0.35 0.50 0.016 0.014 0.020 c 0.15 0.09 0.20 0.006 0.004 0.008 d 2.90 2.80 3.00 0.114 0.110 0.118 d1 1.90 0.075 e 2.80 2.60 3.00 0.110 0.102 0.118 e 0.95 0.037 f 1.60 1.50 1.75 0.063 0.059 0.069 k 0 10 0 10 l 0.35 0.10 0.60 0.014 0.004 0.024 3/4 #0 ! # ! ! $ $ e " % , + &
package mechanical data stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 26/31 doc id 11110 rev 12 figure 28. carrier tape for sot23-5 package t k 0 p 1 a 0 b 0 p 2 p 0 center line s of cavity w e f d top cover tape u s er direction of feed am0 3 07 3 v1 table 8. carrier tape dimensions for sot23-5 package package w d e p 0 p 2 fa 0 b 0 k 0 p 1 tunit bulk qty. sot23-5 8.00 +0.30 ?0.10 1.50 +0.10/ ?0.00 1.75 0.10 4.00 0.10 2.00 0.10 3.50 0.05 3.23 0.10 3.17 0.10 1.37 0.10 4.00 0.10 0.254 0.013 mm 3000
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 part numbering doc id 11110 rev 12 27/31 8 part numbering table 9. ordering information scheme for other options, or for more information on any aspect of this device, please contact the st sales office nearest you. example: stm6xxx lwy6e device type stm6xxx reset threshold voltage l: v rst = 4.514 to 4.746 v m: v rst = 4.270 to 4.490 v t: v rst = 3.000 to 3.150 v s: v rst = 2.850 to 3.000 v r: v rst = 2.564 to 2.696 v z: v rst = 2.243 to 2.358 v y: v rst = 1.950 to 2.050 v reset pulse width (1) 1. contact local sales office for availability. other t rec and watchdog timings are offered. minimum order quantities may apply. a: t rec = 1 to 2 ms blank: t rec = 140 to 280 ms j: t rec = 240 to 480 ms package wy = sot23-5 temperature range 6 = ?40 to 85 c shipping method e = ecopack ? package, tubes f = ecopack ? package, tape and reel
part numbering stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 28/31 doc id 11110 rev 12 table 10. marking description part number reset threshold (v) reset pulse width (ms) topside marking (1) STM6321LWY6F 4.630 200 5au or 5aux stm6321mawy6f 4.390 1.4 5cr or 5crx stm6321mwy6f 4.390 200 5av or 5avx stm6321twy6f 3.080 200 5aw or 5awx stm6321swy6f 2.930 200 5ax or 5axx stm6321rwy6f 2.630 200 5ay or 5ayx stm6322lwy6f 4.630 200 5ba or 5bax stm6322mwy6f 4.390 200 5bb or 5bbx stm6322twy6f 3.080 200 5bc or 5bcx stm6322swy6f 2.930 200 5bd or 5bdx stm6322rwy6f 2.630 200 5be or 5bex stm6821lwy6f 4.630 200 5bg or 5bgx stm6821mwy6f 4.390 200 5bh or 5bhx stm6821twy6f 3.080 200 5bj or 5bjx stm6821swy6f 2.930 200 5bk or 5bkx stm6821rwy6f 2.630 200 5bl or 5blx stm6822lwy6f 4.630 200 5bn or 5bnx stm6822mwy6f 4.390 200 5bp or 5bpx stm6822twy6f 3.080 200 5bq or 5bqx stm6822swy6f 2.930 200 5br or 5brx stm6822rwy6f 2.630 200 5bs or 5bsx stm6822zwy6f 2.300 200 5bt or 5btx stm6822ywy6f 2.000 200 5ct or 5ctx stm6823lwy6f 4.630 200 5bu or 5bux stm6823mwy6f 4.390 200 5bv or 5bvx stm6823tjwy6f 3.080 280 5cm or 5cmx stm6823twy6f 3.080 200 5bw or 5bwx stm6823sjwy6f 2.930 280 5cn or 5cnx stm6823swy6f 2.930 200 5bx or 5bxx stm6823rjwy6f 2.630 280 5cp or 5cpx stm6823rwy6f 2.630 200 5by or 5byx stm6823zwy6f 2.300 200 5bz or 5bzx stm6824lwy6f 4.630 200 5ca or 5cax stm6824mwy6f 4.390 200 5cb or 5cbx stm6824twy6f 3.080 200 5cc or 5ccx
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 part numbering doc id 11110 rev 12 29/31 stm6824swy6f 2.930 200 5cd or 5cdx stm6824rwy6f 2.630 200 5ce or 5cex stm6825lwy6f 4.630 200 5cg or 5cgx stm6825mwy6f 4.390 200 5ch or 5chx stm6825twy6f 3.080 200 5cj or 5cjx stm6825swy6f 2.930 200 5ck or 5ckx stm6825rwy6f 2.630 200 5cl or 5clx 1. where ?x? = assembly work week (a to z), such that ?a? = ww01-02, ?b? = ww03-04, and so forth. table 10. marking description (continued) part number reset threshold (v) reset pulse width (ms) topside marking (1)
revision history stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 30/31 doc id 11110 rev 12 9 revision history table 11. document revision history date revision changes 25-aug-2004 1 first draft 15-dec-2004 2 update characteristics ( figure 15 , 16 , 17 ; ta b l e 6 , and 9 ) 10-mar-2005 3 document promoted to datasheet status 17-jun-2005 4 package marking update ( ta b l e 1 0 ) 11-apr-2006 5 update characteristics, lead-free text, availability ( figure 3 , 4 , 5 , 6 , 7 , 8 , and 9 ; ta b l e 1 , 6 , 9 , and 10 ) 11-aug-2006 6 update description , ta b l e 9 , and 10 . 25-may-2007 7 formatting changes, updated ta b l e 1 0 . 03-jun-2008 8 updated cover page; updated reset threshold values in ta b l e 6 , 9 , and 10 ; addition of text to section 6 ; updated figure 27 and table 6 and 7 ; minor text changes. 09-apr-2009 9 updated section 1.1.1 , section 6 ; added tape and reel specifications figure 28 , table 8 . 06-jan-2011 10 document reformatted, doc id added, updated ta b l e 1 0 , corrected typo in features , section 1.1.4 , section 2.1 , section 2.3 , section 4 , table 4 , ta b l e 6 , ta b l e 9 , figure 7 to figure 11 , figure 14 to figure 26 . 14-jul-2011 11 updated table 10 , corrected typo in ta b l e 6 , table 7 and ta b l e 8 , reformatted figure 27 , updated disclaimer. 27-jun-2012 12 removed note from features , added cross-references to section 4 and section 5 , minor text corrections throughout document.
stm6321, stm6322, stm6821, stm6822, stm6823, stm6824, stm6825 doc id 11110 rev 12 31/31 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at an y time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a particular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by two authorized st representatives, st products are not recommended, authorized or warranted for use in military, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2012 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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