1/10 june 2001 n high speed: f max = 180 mhz (typ.) at v cc = 5v n low power dissipation: i cc = 4 m a (max.) at t a =25c n compatible with ttl outputs: v ih = 2v (min.), v il = 0.8v (max) n power down protection on inputs & outputs n symmetrical output impedance: |i oh | = i ol = 8 ma (min) n balanced propagation delays: t plh @ t phl n operating voltage range: v cc (opr) = 4.5v to 5.5v n pin and function compatible with 74 series 374 n improved latch-up immunity n low noise: v olp = 0.9v (max.) description the 74vhct374a is an advanced high-speed cmos octal d-type flip flop with 3 state outputs non inverting fabricated with sub-micron silicon gate and double-layer metal wiring c 2 mos technology. these 8 bit d-type flip-flop is controlled by a clock input (ck) and an output enable input (oe ). on the positive transition of the clock, the q outputs will be set to the logic state that were setup at the d inputs. when the (oe ) input is low, the 8 outputs will be in a normal logic state (high or low logic level) and when (oe ) is in high level, the outputs will be in a high impedance state. the output control does not affect the internal operation of flip flops; that is, the old data can be retained or the new data can be entered even while the outputs are off. power down protection is provided on all inputs and outputs and 0 to 7v can be accepted on inputs with no regard to the supply voltage. this device can be used to interface 5v to 3v since all inputs are equipped with ttl threshold. all inputs and outputs are equipped with protection circuits against static discharge, giving them 2kv esd immunity and transient excess voltage. 74vhct374a octal d-type flip flop with 3 state outputs non inverting pin connection and iec logic symbols order codes package tube t & r sop 74vhct374am 74vhct374amtr tssop 74VHCT374ATTR tssop sop
74vhct374a 2/10 input equivalent circuit pin description truth table x : dont care z : high impedance logic diagram this logic diagram has not be used to estimate propagation delays pin no symbol name and function 1oe 3 state output enable input (active low) 2, 5, 6, 9, 12, 15, 16, 19 q0 to q7 3-state outputs 3, 4, 7, 8, 13, 14, 17, 18 d0 to d7 data inputs 11 clock clock input (low to high, edge triggered 10 gnd ground (0v) 20 v cc positive supply voltage inputs output oe ck d q hxxz l x no change lll lhh
74vhct374a 3/10 absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditi ons is not implied 1) output in off state 2) high or low state recommended operating conditions 1) output in off state 2) high or low state 3) vin from 0.8v to 2v symbol parameter value unit v cc supply voltage -0.5 to +7.0 v v i dc input voltage -0.5 to +7.0 v v o dc output voltage (see note 1) -0.5 to +7.0 v v o dc output voltage (see note 2) -0.5 to v cc + 0.5 v i ik dc input diode current - 20 ma i ok dc output diode current 20 ma i o dc output current 25 ma i cc or i gnd dc v cc or ground current 50 ma t stg storage temperature -65 to +150 c t l lead temperature (10 sec) 300 c symbol parameter value unit v cc supply voltage 4.5 to 5.5 v v i input voltage 0 to 5.5 v v o output voltage (see note 1) 0 to 5.5 v v o output voltage (see note 2) 0 to v cc v t op operating temperature -55 to 125 c dt/dv input rise and fall time (see note 3) (v cc = 5.0 0.5v) 0 to 20 ns/v
74vhct374a 4/10 dc specifications ac electrical characteristics (input t r = t f = 3ns) (*) voltage range is 5.0v 0.5v note 1 : parameter guaranteed by design. t solh = |t plhm - t plhn |, t sohl = |t phlm - t phln | symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. v ih high level input voltage 4.5 to 5.5 222v v il low level input voltage 4.5 to 5.5 0.8 0.8 0.8 v v oh high level output voltage 4.5 i o =-50 m a 4.4 4.5 4.4 4.4 v 4.5 i o =-8 ma 3.94 3.8 3.7 v ol low level output voltage 4.5 i o =50 m a 0.0 0.1 0.1 0.1 v 4.5 i o =8 ma 0.36 0.44 0.55 ioz high impedance output leakege current 4.5 to 5.5 v i = v ih or v il v o = 0v or 5.5v 0.25 2.5 2.5 m a i i input leakage current 0 to 5.5 v i = 5.5v or gnd 0.1 1.0 1.0 m a i cc quiescent supply current 5.5 v i = v cc or gnd 44040 m a i cc additional worst case supply current 5.5 one input at 3.4v, other input at v cc or gnd 1.35 1.5 1.5 ma i opd output leakage current 0 v out = 5.5v 0.5 5.0 5.0 m a symbol parameter test condition value unit v cc (v) c l (pf) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. t plh t phl propagation delay time ck to q 5.0 (*) 15 5.6 9.4 1.0 10.5 1.0 10.5 ns 5.0 (*) 50 6.4 10.4 1.0 11.5 1.0 11.5 t pzl t pzh output enable time 5.0 (*) 15 rl = 1k w 6.2 10.2 1.0 11.5 1.0 11.5 ns 5.0 (*) 50 7.3 11.2 1.0 12.5 1.0 12.5 t plz t phz output disable time 5.0 (*) 50 rl = 1k w 7.0 11.2 1.0 12.0 1.0 12.0 ns t w clock pulse width high or low 5.0 (*) 6.5 6.5 6.5 ns t s setup time d to ck high or low 5.0 (*) 2.0 2.0 2.0 ns t h hold time d to ck high or low 5.0 (*) 1.5 1.5 1.5 ns f max maximum clock frequency 5.0 (*) 15 90 180 80 80 mhz 5.0 (*) 50 85 170 75 75 t oslh t oshl output to output skew time (note 1) 5.0 (*) 50 1.0 1.0 1.0 ns
74vhct374a 5/10 capacitive characteristics 1) c pd is defined as the value of the ics internal equivalent capacitance which is calculated from the operating current consumption without load. (refer to test circuit). average operating current can be obtained by the following equation. i cc(opr) = c pd x v cc x f in + i cc /8 (per flip-flop) dynamic switching characteristics 1) worst case package. 2) max number of outputs defined as (n). data inputs are driven 0v to 3.0v, (n-1) outputs switching and one output at gnd. 3) max number of data inputs (n) switching. (n-1) switching 0v to 3.0v. inputs under test switching: 3.0v to threshold (v ild ), 0v to threshold (v ihd ), f=1mhz. symbol parameter test condition value unit t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. c in input capacitance 7101010pf c out output capacitance 9pf c pd power dissipation capacitance (note 1) 15 pf symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. v olp dynamic low voltage quiet output (note 1, 2) 5.0 c l = 50 pf 0.6 0.9 v v olv -0.9 -0.6 v ihd dynamic high voltage input (note 1, 3) 5.0 2.0 v ild dynamic low voltage input (note 1, 3) 5.0 0.8
74vhct374a 6/10 test circuit c l =15/50pf or equivalent (includes jig and probe capacitance) r l = r1 = 1k w or equivalent r t = z out of pulse generator (typically 50 w ) waveform 1: propagation delays, setup and hold times (f=1mhz; 50% duty cycle) test switch t plh , t phl open t pzl , t plz v cc t pzh , t phz gnd
74vhct374a 7/10 waveform 2: output enable and disable times (f=1mhz; 50% duty cycle) waveform 3: pulse width (f=1mhz; 50% duty cycle)
74vhct374a 8/10 dim. mm. inch min. typ max. min. typ. max. a 2.65 0.104 a1 0.1 0.2 0.004 0.008 a2 2.45 0.096 b 0.35 0.49 0.014 0.019 b1 0.23 0.32 0.009 0.012 c 0.5 0.020 c1 45 (typ.) d 12.60 13.00 0.496 0.512 e 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 11.43 0.450 f 7.40 7.60 0.291 0.300 l 0.50 1.27 0.020 0.050 m 0.75 0.029 s8 (max.) so-20 mechanical data po13l
74vhct374a 9/10 dim. mm. inch min. typ max. min. typ. max. a 1.2 0.047 a1 0.05 0.15 0.002 0.004 0.006 a2 0.8 1 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 d 6.4 6.5 6.6 0.252 0.256 0.260 e 6.2 6.4 6.6 0.244 0.252 0.260 e1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 bsc 0.0256 bsc k0 80 8 l 0.45 0.60 0.75 0.018 0.024 0.030 tssop20 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 0087225c
74vhct374a 10/10 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. ? the st logo is a registered trademark of stmicroelectronics ? 2001 stmicroelectronics - printed in italy - all rights reserved stmicroelectronics group of companies australia - brazil - china - finland - france - germany - hong kong - india - italy - japan - malaysia - malta - morocco singapore - spain - sweden - switzerland - united kingdom ? http://www.st.com
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