6 5 4 3 2 1 44 43 42 41 40 7 8 9 10 11 12 13 14 15 16 17 29 30 39 38 37 36 35 34 33 32 31 28 27 26 25 24 23 22 21 20 19 18 dwg. pp-050 in c gnd ic gnd ic ic chip enable logic supply gnd gnd in b 4-to-14 line decoder output driver bank a output driver bank b out b0 nc out a9 out a8 out a7 out a6 out a5 out a4 out a3 out a2 out a1 out a0 out b1 out b2 out b3 out b4 out b5 out b6 out b7 out b8 out b9 output enable b output enable a out b10 out b11 out b12 out b13 out a13 out a12 out a11 out a10 v dd in (msb) d in (lsb) a always order by complete part number: A6817sep . addressable 28-line decoder/driver intended for use in ink-jet printer applications, the A6817sep addressable 28-line decoder/driver combines low-power cmos inputs and logic with 28 high-current, high-voltage bipolar outputs. a 4-to-14 line decoder determines the selected output driver (n) in each 14-driver bank. two independent output-enable inputs (active low) then provide the final decoding to activate 1- or 2-of-28 outputs (out an and/or out bn ). special internal circuitry is programmed at the time of manufacture to adjust the output pulse timing and thereby the energy the device delivers to the ink-jet print head. the dabic-iv A6817sep directly replaces the original bimos-ii a5817sep in most applications. the cmos inputs cause minimal loading and are compatible with standard cmos, pmos, and nmos logic. use with ttl or dtl circuits may require appropriate pull-up resistors to ensure an input logic high. the internal cmos logic operates from a 5 v supply. a chip enable function is provided to lock out the drivers during system power up. the 28 bipolar power outputs are open-collector 30 v darlington drivers capable of sinking 500 ma at ambient temperatures up to 85 c. the A6817sep is furnished in a 44-lead plastic chip carrier (quad pack) for minimum-area, surface-mount applications. features controlled characteristics for ink-jet printers addressable data entry 30 v minimum v (br)cex cmos, pmos, nmos compatible inputs low-power cmos logic absolute maximum ratings at t a = 25 c output voltage, v ce ............................. 30 v logic supply voltage, v dd .................. 7.0 v input voltage range, v in ....................... -0.3 v to v dd + 0.3 v output current, i c ........................... 600 ma package power dissipation, p d ..... 2.70 w* operating temperature range, t a ................................. -20 c to +85 c storage temperature range, t s .............................. -55 c to +150 c *derate at rate of 22 mw/ c above t a = 25 c. caution: these cmos devices have input static protection (class 2) but are still susceptible to damage when exposed to extremely high static electrical charges. 6817 data sheet 26186.22*
6817 addressable 28-line decoder/driver 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 dw g . fp-032 4-to-14 line decoder chip enable in (msb) d in (lsb) a in b in c logic supply output enable a output enable b out a0 out a1 out a2 out a11 out a12 out a13 out b0 out b1 out b2 out b11 out b12 out b13 turn-on delay turn-on delay functional block diagram typical input circuit typical output driver dw g . ep-010-1 in v dd dw g . ep-021-7 out n w copyright ? 1997, 2000 allegro microsystems, inc.
6817 addressable 28-line decoder/driver www.allegromicro.com electrical characteristics at t a = +25 c, v dd = 5.0 v. limits characteristic symbol test conditions min typ max units output drivers output leakage current i cex v ce = 30 v <1.0 100 a output saturation voltage v ce(sat) i out = 450 ma 0.80 1.10 1.40 v i out = 400 ma 0.75 1.05 1.35 v output breakdown voltage v (br)cex r l = 56 ? 30 v unclamped inductive v cc = 30 v, l = 3 h, r l = 56 ? , see note load current i l = 500 ma, test fig. turn-on time t phl v cc = 21 v, r l = 39 ? 25 100 425 ns fall time t f v cc = 21 v, r l = 39 ? 20ns turn-off time t plh v cc = 21 v, r l = 39 ? 50 125 350 ns rise time t r v cc = 21 v, r l = 39 ? 50ns control logic logic input voltage v in(1) 3.5 v v in(0) 0.8 v logic input current i in(1) v in = 5.0 v <1.0 100 a i in(0) v in = 0 v <-1.0 -100 a input resistance r in 50 k ? supply current i dd(on) two outputs on 6.0 10.0 ma i dd(off) all drivers off, all inputs = 0 v, 600 a oe a = oe b = v dd note: device will turn off and meet all specifications after test.
6817 addressable 28-line decoder/driver 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 output enable ( a and/or b ) in a-d a b enable t plh t phl t out t 50% 10% 90% t 50% 10% 90% t r f dw g . wp-017 output voltage n l v cc r dwg. ep-044 i l out n unclamped inductive load current test figure timing conditions (logic levels are v dd and ground) a. minimum data active time before output enable (data set-up time) ............ 150 ns b. minimum data hold time after output enable (data hold time) ..................... 250 ns
6817 addressable 28-line decoder/driver www.allegromicro.com applications information this device is intended specifically for, although certainly not limited to, driving ink-jet print heads. in this application, a certain minimum energy (a function of load voltage and output pulse duration) is required for proper operation, while excessive energy will degrade the life of the print head. the output pulse duration (t out ) is equal to t enable + t plh C t phl , where t phl is adjusted during manufacture to compensate for variations in the output saturation voltage (v ce(sat) ). for the A6817sep, the relationship between t out and t enable at t a = 25 c is: t out = t enable ([v ce(sat) (actual) C v ce(sat) (typical)] x 330 ns) + 25 ns + 110 ns. for most applications, this will result in a driver- contribution-to-energy-error of less than 4%. a logic low on the chip enable input will prevent the drivers from turning on, regardless of the state of other inputs or the logic supply voltage. the chip enable input has a slow response time and should not be used as a high-speed control line. for proper operation, all ground terminals should be connected to a common ground on the printed wiring board. the ic (internal connection) terminals are used to program the turn-on time of the device and must be left electrically unconnected (floating) for proper operation. decoder truth table in d in c in b in a (msb) (lsb) n 00000 00011 00102 00113 01004 01015 01106 01117 10008 10019 101010 101111 110012 110113 1110 all off 1111 all off depending on the four address inputs, the 4-to-14 line decoder selects one driver from each of the 14 output a and b banks of sink drivers according to the decoder truth table. the state of the selected outputs is deter- mined by the output enable inputs as shown in the enable truth table. chip output output outputs (off unless otherwise specified. enable enable a enable b for the value of n see the decoder truth table) 0 x x all off 1 1 1 all off 1 0 1 out an on 1 1 0 out bn on 1 0 0 out an on, out bn on x = irrelevant enable truth table
6817 addressable 28-line decoder/driver 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 notes: 1. exact body and lead configuration at vendor s option within limits shown. 2. lead spacing tolerance is non-cumulative. 3. supplied in standard sticks/tubes of 27 devices or add tr to part number for tape and reel. 18 28 dwg. ma-005-44a in 0.020 min 0.050 bsc 1 44 0.021 0.013 index area 2 6 7 17 29 39 40 0.695 0.685 0.032 0.026 0.319 0.291 0.319 0.291 0.180 0.165 0.695 0.685 0.656 0.650 0.656 0.650 dimensions in inches (for reference only) dimensions in millimeters (controlling dimensions) dwg. ma-005-44a mm 17.65 17.40 0.51 min 4.57 4.20 17.65 17.40 16.662 16.510 1.27 bsc 0.812 0.661 1 44 0.533 0.331 index area 2 28 29 39 40 6 7 17 18 16.662 16.510 8.10 7.39 8.10 7.39
6817 addressable 28-line decoder/driver www.allegromicro.com the products described here are manufactured under one or more u.s. patents or u.s. patents pending. allegro microsystems, inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. before placing an order, the user is cautioned to verify that the information being relied upon is current. allegro products are not authorized for use as critical components in life-support devices or systems without express written approval. the information included herein is believed to be accurate and reliable. however, allegro microsystems, inc. assumes no responsi- bility for its use; nor for any infringement of patents or other rights of third parties which may result from its use.
6817 addressable 28-line decoder/driver 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 power interface drivers function output ratings* part number ? serial-input latched drivers 8-bit (saturated drivers) -120 ma 50 v? 5895 8-bit 350 ma 50 v 5821 8-bit 350 ma 80 v 5822 8-bit 350 ma 50 v? 5841 8-bit 350 ma 80 v? 5842 8-bit (constant-current led driver) 75 ma 17 v 6275 8-bit (dmos drivers) 250 ma 50 v 6595 8-bit (dmos drivers) 350 ma 50 v? 6a595 8-bit (dmos drivers) 100 ma 50 v 6b595 10-bit (active pull-downs) -25 ma 60 v 5810-f and 6809/10 12-bit (active pull-downs) -25 ma 60 v 5811 and 6811 16-bit (constant-current led driver) 75 ma 17 v 6276 20-bit (active pull-downs) -25 ma 60 v 5812-f and 6812 32-bit (active pull-downs) -25 ma 60 v 5818-f and 6818 32-bit 100 ma 30 v 5833 32-bit (saturated drivers) 100 ma 40 v 5832 parallel-input latched drivers 4-bit 350 ma 50 v? 5800 8-bit -25 ma 60 v 5815 8-bit 350 ma 50 v? 5801 8-bit (dmos drivers) 100 ma 50 v 6b273 8-bit (dmos drivers) 250 ma 50 v 6273 special-purpose devices unipolar stepper motor translator/driver 1.25 a 50 v? 5804 addressable 8-bit decoder/dmos driver 250 ma 50 v 6259 addressable 8-bit decoder/dmos driver 350 ma 50 v? 6a259 addressable 8-bit decoder/dmos driver 100 ma 50 v 6b259 addressable 28-line decoder/driver 450 ma 30 v 6817 * current is maximum specified test condition, voltage is maximum rating. see specification for sustaining voltage limits. negative current is defined as coming out of (sourcing) the output. ? complete part number includes additional characters to indicate operating temperature range and package style. internal transient-suppression diodes included for inductive-load protection.
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