(cid:1)(cid:2)(cid:3)(cid:4)(cid:5)(cid:6)(cid:3)(cid:7)(cid:8)(cid:9)(cid:10)(cid:1)(cid:2)(cid:7)(cid:4)(cid:5)(cid:6)(cid:3)(cid:7)(cid:8) (cid:11)(cid:12)(cid:8)(cid:13)(cid:14)(cid:12)(cid:15)(cid:16)(cid:17)(cid:10)(cid:18)(cid:19)(cid:16)(cid:20)(cid:2)(cid:17)(cid:10)(cid:21)(cid:22)(cid:10)(cid:6)(cid:19)(cid:16)(cid:20)(cid:2)(cid:17)(cid:10)(cid:13)(cid:8)(cid:21)(cid:8)(cid:10)(cid:1)(cid:17)(cid:16)(cid:17)(cid:23)(cid:21)(cid:22)(cid:14)(cid:1)(cid:24)(cid:25)(cid:12)(cid:16)(cid:21)(cid:20)(cid:15)(cid:16)(cid:17)(cid:26)(cid:17)(cid:14)(cid:1) (cid:27) SDFS053A − MARCH 1987 − REVISED OCTOBER 1993 • Buffered Inputs and Outputs SN54F157A...J PACKAGE • SN74F157A...D OR N PACKAGE Package Options Include Plastic (TOP VIEW) Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic A/B 1 16 VCC 300-mil DIPs 1A 2 15 G 1B 3 14 4A description 1Y 4 13 4B The ′F157A is a quadruple 2-input data 2A 5 12 4Y selector/multiplexer featuring a common strobe 2B 6 11 3A (G) input. When the strobe is high, all outputs are 2Y 7 10 3B low. When the strobe is low, a 4-bit word is GND 8 9 3Y selected from one of two sources and is routed to the four outputs. The ′F157A provides true data. SN54F157A...FK PACKAGE The SN54F157A is characterized for operation (TOP VIEW) over the full military temperature range of −55°C to 125°C. The SN74F157A is characterized for 1A A/B NCVCCG operation from 0°C to 70°C. 3 2 1 20 19 1B 4 18 4A FUNCTION TABLE 1Y 5 17 4B INPUTS OOUUTTPPUUTT NC 6 16 NC G A/B A B Y 2A 7 15 4Y H X X X L 2B 8 14 3A 9 10 11 12 13 L L L X L L L H X H Y D CY B 2 N N3 3 L H X L L G L H X H H NC − No internal connection (cid:15)(cid:14)(cid:22)(cid:13)(cid:12)(cid:23)(cid:21)(cid:20)(cid:22)(cid:2) (cid:13)(cid:8)(cid:21)(cid:8) (cid:28)(cid:29)(cid:30)(cid:31)!"#$(cid:28)(cid:31)(cid:29) (cid:28)% &’!!((cid:29)$ #% (cid:31)(cid:30) )’*+(cid:28)&#$(cid:28)(cid:31)(cid:29) ,#$(- Copyright  1993, Texas Instruments Incorporated (cid:15)!(cid:31),’&$% &(cid:31)(cid:29)(cid:30)(cid:31)!" $(cid:31) %)(&(cid:28)(cid:30)(cid:28)&#$(cid:28)(cid:31)(cid:29)% )(! $.( $(!"% (cid:31)(cid:30) (cid:21)(/#% (cid:20)(cid:29)%$!’"((cid:29)$% %$#(cid:29),#!, 0#!!#(cid:29)$1- (cid:15)!(cid:31),’&$(cid:28)(cid:31)(cid:29) )!(cid:31)&(%%(cid:28)(cid:29)2 ,(cid:31)(% (cid:29)(cid:31)$ (cid:29)(&(%%#!(cid:28)+1 (cid:28)(cid:29)&+’,( $(%$(cid:28)(cid:29)2 (cid:31)(cid:30) #++ )#!#"($(!%- POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2−1 • POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443

(cid:1)(cid:2)(cid:3)(cid:4)(cid:5)(cid:6)(cid:3)(cid:7)(cid:8)(cid:9)(cid:10)(cid:1)(cid:2)(cid:7)(cid:4)(cid:5)(cid:6)(cid:3)(cid:7)(cid:8) (cid:11)(cid:12)(cid:8)(cid:13)(cid:14)(cid:12)(cid:15)(cid:16)(cid:17)(cid:10)(cid:18)(cid:19)(cid:16)(cid:20)(cid:2)(cid:17)(cid:10)(cid:21)(cid:22)(cid:10)(cid:6)(cid:19)(cid:16)(cid:20)(cid:2)(cid:17)(cid:10)(cid:13)(cid:8)(cid:21)(cid:8)(cid:10)(cid:1)(cid:17)(cid:16)(cid:17)(cid:23)(cid:21)(cid:22)(cid:14)(cid:1)(cid:24)(cid:25)(cid:12)(cid:16)(cid:21)(cid:20)(cid:15)(cid:16)(cid:17)(cid:26)(cid:17)(cid:14)(cid:1) (cid:27) SDFS053A − MARCH 1987 − REVISED OCTOBER 1993 logic symbol† logic diagram (positive logic) 15 2 G EN 1A 1 A/B G1 4 1Y 3 2 1B 1A 1 MUX 4 3 1Y 1B 1 5 5 2A 2A 7 6 2Y 7 2B 6 2Y 11 2B 3A 9 10 3Y 3B 11 14 3A 4A 12 13 4Y 9 4B 10 3Y 3B †This symbol is in accordance with ANSI/IEEE Std 91-1984 and 14 IEC Publication 617-12. 4A Pin numbers shown are for the D, J, and N packages. 12 4Y 13 4B 15 G 1 A/B absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage range, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V CC 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: SN54F157A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 125°C SN74F157A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” 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. recommended operating conditions SN54F157A SN74F157A UUNNIITT MIN NOM MAX MIN NOM MAX VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V VIH High-level input voltage 2 2 V VIL Low-level input voltage 0.8 0.8 V IIK Input clamp current −18 −18 mA IOH High-level output current −1 −1 mA IOL Low-level output current 20 20 mA TA Operating free-air temperature −55 125 0 70 °C 2−2 POST OFFICE BOX 65•5303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443

(cid:1)(cid:2)(cid:3)(cid:4)(cid:5)(cid:6)(cid:3)(cid:7)(cid:8)(cid:9)(cid:10)(cid:1)(cid:2)(cid:7)(cid:4)(cid:5)(cid:6)(cid:3)(cid:7)(cid:8) (cid:11)(cid:12)(cid:8)(cid:13)(cid:14)(cid:12)(cid:15)(cid:16)(cid:17)(cid:10)(cid:18)(cid:19)(cid:16)(cid:20)(cid:2)(cid:17)(cid:10)(cid:21)(cid:22)(cid:10)(cid:6)(cid:19)(cid:16)(cid:20)(cid:2)(cid:17)(cid:10)(cid:13)(cid:8)(cid:21)(cid:8)(cid:10)(cid:1)(cid:17)(cid:16)(cid:17)(cid:23)(cid:21)(cid:22)(cid:14)(cid:1)(cid:24)(cid:25)(cid:12)(cid:16)(cid:21)(cid:20)(cid:15)(cid:16)(cid:17)(cid:26)(cid:17)(cid:14)(cid:1) (cid:27) SDFS053A − MARCH 1987 − REVISED OCTOBER 1993 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) SN54F157A SN74F157A PPAARRAAMMEETTEERR TTEESSTT CCOONNDDIITTIIOONNSS UUNNIITT MIN TYP† MAX MIN TYP† MAX VIK VCC = 4.5 V, II = −18 mA −1.2 −1.2 V VCC = 4.5 V, IOH = −1 mA 2.5 3.4 2.5 3.4 VVOOHH VV VCC = 4.75 V, IOH = −1 mA 2.7 VOL VCC = 4.5 V, IOL = 20 mA 0.3 0.5 0.3 0.5 V II VCC = 5.5 V, VI = 7 V 0.1 0.1 mA IIH VCC = 5.5 V, VI = 2.7 V 20 20 µA IIL VCC = 5.5 V, VI = 0.5 V −0.6 −0.6 mA IOS‡ VCC = 5.5 V, VO = 0 −60 −150 −60 −150 mA ICC VCC = 5.5 V, VI = 4.5 V 15 23 15.5 23 mA †All typical values are at VCC = 5 V, TA = 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) VCC = 5 V, VCC = 4.5 V to 5.5 V, CL = 50 pF, CL = 50 pF, FROM TO RL = 500 Ω, RL = 500Ω, PARAMETER ((IINNPPUUTT)) ((OOUUTTPPUUTT)) TA = 25°C TA = MIN to MAX§ UNIT ′F157A SN54F157A SN74F157A MIN TYP MAX MIN MAX MIN MAX tPLH 3.2 6.6 10 3.2 12 3.2 11 AA//BB YY nnss tPHL 2.2 4.6 7 2.2 9 2.2 8 tPLH 4.2 6.6 9.5 4.2 13 4.2 11 GG YY nnss tPHL 1.7 4.1 6.5 1.7 7.5 1.7 7 tPLH 1.7 4.1 6 1.7 7.5 1.7 6.5 AA oorr BB YY nnss tPHL 1.7 3.6 5.5 1 7.5 1.2 7 §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. POST OFFICE BOX 65•5303 • DALLAS, TEXAS 75265 2−3 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443

(cid:1)(cid:2)(cid:3)(cid:4)(cid:5)(cid:6)(cid:3)(cid:7)(cid:8)(cid:9)(cid:10)(cid:1)(cid:2)(cid:7)(cid:4)(cid:5)(cid:6)(cid:3)(cid:7)(cid:8) (cid:11)(cid:12)(cid:8)(cid:13)(cid:14)(cid:12)(cid:15)(cid:16)(cid:17)(cid:10)(cid:18)(cid:19)(cid:16)(cid:20)(cid:2)(cid:17)(cid:10)(cid:21)(cid:22)(cid:10)(cid:6)(cid:19)(cid:16)(cid:20)(cid:2)(cid:17)(cid:10)(cid:13)(cid:8)(cid:21)(cid:8)(cid:10)(cid:1)(cid:17)(cid:16)(cid:17)(cid:23)(cid:21)(cid:22)(cid:14)(cid:1)(cid:24)(cid:25)(cid:12)(cid:16)(cid:21)(cid:20)(cid:15)(cid:16)(cid:17)(cid:26)(cid:17)(cid:14)(cid:1) (cid:27) SDFS053A − MARCH 1987 − REVISED OCTOBER 1993 2−4 POST OFFICE BOX 65•5303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443

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