sn74bct757 octal buffer/driver with open-collector outputs scbs041d november 1989 revised november 1993 copyright ? 1993, texas instruments incorporated 21 post office box 655303 ? dallas, texas 75265 ? bicmos design significantly reduces i ccz ? esd protection exceeds 2000 v per mil-std-883c, method 3015; exceeds 200 v using machine model (c = 200 pf, r = 0) ? open-collector outputs drive bus lines or buffer memory address registers ? package options include plastic small-outline (dw) packages and standard plastic 300-mil dips (n) description this octal buffer and line driver is designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. this device provides complementary output-enable (oe and oe ) inputs and noninverting outputs. the sn74bct757 is characterized for operation from 0 c to 70 c. function tables inputs output 1oe 1a 1y h x h l ll l h h inputs output 2oe 2a 2y l x h h ll h h h dw or n package (top view) 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 1oe 1a1 2y4 1a2 2y3 1a3 2y2 1a4 2y1 gnd v cc 2oe 1y1 2a4 1y2 2a3 1y3 2a2 1y4 2a1 production data information is current as of publication date. products conform to specifications per the terms of texas instruments standard warranty. production processing does not necessarily include testing of all parameters.
sn74bct757 octal buffer/driver with open-collector outputs scbs041d november 1989 revised november 1993 22 post office box 655303 ? dallas, texas 75265 logic symbol 2 logic diagram (positive logic) 2 this symbol is in accordance with ansi/ieee std 91-1984 and iec publication 617-12. 2 1a1 4 1a2 6 1a3 8 1a4 en 1 1y1 18 1y2 16 1y3 14 1y4 12 11 2a1 13 2a2 15 2a3 17 2a4 en 19 2oe 2y1 9 2y2 7 2y3 5 2y4 3 1oe 1 2 4 6 8 19 11 13 15 17 3 5 7 9 12 14 16 18 1a1 1a2 1a3 1a4 1y1 2oe 2a1 2a2 2a3 2a4 2y1 1y2 1y3 1y4 2y2 2y3 2y4 1oe absolute maximum ratings over operating free-air temperature range (unless otherwise noted) 3 supply voltage range, v cc 0.5 v to 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage range, v i 0.5 v to 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input current range, i i 30 ma to 5 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . voltage range applied to any output in the disabled or power-off state, v o 0.5 v to 5.5 v . . . . . . . . . . . . . . . voltage range applied to any output in the high state, v o 0.5 v to v cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . current into any output in the low state, i o 128 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating free-air temperature range 0 c to 70 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range 65 c to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 stresses beyond those listed under aabsolute maximum ratingso may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated under arecommended operating conditi onso is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
sn74bct757 octal buffer/driver with open-collector outputs scbs041d november 1989 revised november 1993 23 post office box 655303 ? dallas, texas 75265 recommended operating conditions (see note 1) min nom max unit v cc supply voltage 4.5 5 5.5 v v ih high-level input voltage 2 v v il low-level input voltage 0.8 v v oh high-level output voltage 5.5 v i ik input clamp current 18 ma i ol low-level output current 64 ma t a operating free-air temperature 0 70 c note 1: unused or floating inputs must be held high or low. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) parameter test conditions min typ 2 max unit v ik v cc = 4.5 v, i i = 18 ma 1.2 v v ol v cc = 4.5 v, i ol = 64 ma 0.42 0.55 v i i v cc = 5.5 v, v i = 7 v 0.1 ma i ih v cc = 5.5 v, v i = 2.7 v 20 m a i il v cc = 5.5 v, v i = 0.5 v 1 ma i oh v cc = 4.5 v, v oh = 5.5 v 0.1 ma outputs high 34 i cc v cc = 5.5 v, outputs open outputs low 77 ma oe and oe inactive 10 c i v cc = 5 v, v i = 2.5 v or 0.5 v 6 pf c o v cc = 5 v, v o = 2.5 v or 0.5 v 4 pf 2 all typical values are at v cc = 5 v, t a = 25 c. switching characteristics over recommended ranges of supply voltage and operating free-air temperature, c l = 50 pf (unless otherwise noted) (see note 2) parameter from (input) to (output) v cc = 5 v, t a = 25 c min max unit (input) (output) min typ max t plh a y 6.9 8.3 9.6 6.6 10.1 ns t phl a y 2.4 4.2 6 2 6.6 ns t plh 2oe y 11 14.8 17.9 10.8 19.7 ns t phl 2oe y 2.9 4.6 6.2 2.6 6.9 ns t plh 1oe y 11.4 13.9 16.1 10 18 ns t phl 1oe y 4.4 6.1 7.8 4 8.5 ns note 2: load circuits and voltage waveforms are shown in section 1.
sn74bct757 octal buffer/driver with open-collector outputs scbs041d november 1989 revised november 1993 24 post office box 655303 ? dallas, texas 75265
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