sdfs054a ? d2932, march 1987 ? revised october 1993 copyright ? 1993, texas instruments incorporated 2?1 post office box 655303 ? dallas, texas 75265 post office box 1443 ? houston, texas 77251?1443 ? buffered inputs and outputs ? package options include plastic small-outline packages, ceramic chip carriers, and standard plastic and ceramic 300-mil dips description the f158a is a quadruple 2-input data selector/multiplexer featuring a direct strobe (g ) input. when the strobe is high, all outputs are high. when the strobe is low, a 4-bit word is selected from one of two sources and is routed to the four outputs. the f158a provides inverted data. the SN54F158A is characterized for operation over the full military temperature range of ? 55 c to 125 c. the sn74f158a is characterized for operation from 0 c to 70 c. function table inputs output g a /b a b output y h x x x h l llx h l lhx l l hxl h l h x h l SN54F158A ...j p ackage sn74f158a ...d or n p ackage (top view) 3212019 910111213 4 5 6 7 8 18 17 16 15 14 4a 4b nc 4y 3a 1b 1y nc 2a 2b SN54F158A . . . fk package (top view) 1a a/b nc 3y 3b g 2y gnd nc nc ? no internal connection v cc 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 a /b 1a 1b 1y 2a 2b 2y gnd v cc g 4a 4b 4y 3a 3b 3y
sdfs054a ? d2932, march 1987 ? revised october 1993 2?2 post office box 655303 ? dallas, texas 75265 post office box 1443 ? houston, texas 77251?1443 logic symbol ? logic diagram (positive logic) g mux 2 1a 1 3 1b en 15 g1 1 1y 4 5 2a 6 2b 2y 7 11 3a 10 3b 3y 9 14 4a 13 4b 4y 12 a /b 4y 3y 2y 1y 12 9 7 4 a /b g 4b 4a 3b 3a 2b 2a 1b 1a 1 15 13 14 10 11 6 5 3 2 ? this symbol is in accordance with ansi/ieee std 91-1984 and iec publication 617-12. 1 pin numbers shown are for the d, j, and n packages. absolute maximum ratings over operating free-air temperature range (unless otherwise noted) ? supply voltage range, v cc ?0.5 v to 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage range (see note 1) ?1.2 v to 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input current range ?30 ma to 5 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . voltage range applied to any output in the high state ?0.5 v to v cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . current into any output in the low state 40 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating free-air temperature range: SN54F158A ?55 c to 125 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . sn74f158a 0 c to 70 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range ?65 c to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ? stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only an d functional operation of the device at these or any other conditions beyond those indicated under ?recommended operating conditi ons? is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. note 1: the input voltage rating may be exceeded provided that the input current rating is observed.
sdfs054a ? d2932, march 1987 ? revised october 1993 2?3 post office box 655303 ? dallas, texas 75265 post office box 1443 ? houston, texas 77251?1443 recommended operating conditions SN54F158A sn74f158a unit min nom max min nom max unit v cc supply voltage 4.5 5 5.5 4.5 5 5.5 v v ih high-level input voltage 2 2 v v il low-level input voltage 0.8 0.8 v i ik input clamp current ?18 ?18 ma i oh high-level output current ?1 ?1 ma i ol low-level output current 20 20 ma t a operating free-air temperature ?55 125 0 70 c electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) parameter test conditions SN54F158A sn74f158a unit parameter test conditions min typ ? max min typ ? max unit v ik v cc = 4.5 v, i i = ? 18 ma ?1.2 ?1.2 v v oh v cc = 4.5 v, i oh = ? 1 ma 2.5 3.4 2.5 3.4 v v oh v cc = 4.75 v, i oh = ? 1 ma 2.7 v v ol v cc = 4.5 v, i ol = 20 ma 0.3 0.5 0.3 0.5 v i i v cc = 5.5 v, v i = 7 v 0.1 0.1 ma i ih v cc = 5.5 v, v i = 2.7 v 20 20 a i il v cc = 5.5 v, v i = 0.5 v ? 0.6 ? 0.6 ma i os ? v cc = 5.5 v, v o = 0 ?60 ?150 ?60 ?150 ma i cc v cc = 5.5 v, v i = 4.5 v 10 15 10 15 ma ? all typical values are at v cc = 5 v, t a = 25 c. ? not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second. switching characteristics (see note 2) parameter from (input) to (output) v cc = 5 v, c l = 50 pf, r l = 500 ? , t a = 25 c v cc = 4.5 v to 5.5 v, c l = 50 pf, r l = 500 ? , t a = min to max unit (input) (output) f158a SN54F158A sn74f158a min typ max min max min max t plh a /b y 2.2 5.1 8.5 2.2 10.5 2.2 9.5 ns t phl a /b y 1.7 4.1 6.5 1.7 8 1.7 7 ns t plh g y 1.7 4.1 6 1.7 8 1.7 7 ns t phl g y 1.2 3.6 6 1.2 7 1.2 6.5 ns t plh a or b y 1.7 3.6 5.9 1.7 8.5 1.7 7 ns t phl a or b y 1 2.1 4 1 5 1 4.5 ns for conditions shown as min or max, use the appropriate value specified under recommended operating conditions. note 2: load circuits and voltage waveforms are shown in section 1.
sdfs054a ? d2932, march 1987 ? revised october 1993 2?4 post office box 655303 ? dallas, texas 75265 post office box 1443 ? houston, texas 77251?1443
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