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Details, datasheet, quote on part number:SN54ALS157AFK
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Datasheet text preview:
SN54ALS157A, SN54ALS158 SN74ALS157A, SN74ALS158, SN74AS157, SN74AS158 QUADRUPLE 1-OF-2 DATA SELECTORS/MULTIPLEXERS
SDAS081C APRIL 1982 REVISED DECEMBER 1994
· ·
Buffered Inputs and Outputs Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs
SN54ALS157A, SN54ALS158 . . . J PACKAGE SN74ALS157A, SN74ALS158, SN74AS157, SN74AS158 . . . D OR N PACKAGE (TOP VIEW)
description
These data selectors/multiplexers contain inverters and drivers to supply full data selection to the four output gates. A separate strobe (G) input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The ALS157A and SN74AS157 present true data. The ALS158 and SN74AS158 present inverted data to minimize propagation delay time. The SN54ALS157A and SN54ALS158 are characterized for operation over the full military temperature range of 55°C to 125°C. The SN74ALS157A, SN74ALS158, SN74AS157, and SN74AS158 are characterized for operation from 0°C to 70°C.
A /B 1A 1B 1Y 2A 2B 2Y GND
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VCC G 4A 4B 4Y 3A 3B 3Y
SN54ALS157A, SN54ALS158 . . . FK PACKAGE (TOP VIEW)
1A A/B NC VCC
3 4 5 6 7 8
1B 1Y NC 2A 2B
2 1 20 19 18 17 16 15
G 4A 4B NC 4Y 3A
14 9 10 11 12 13
NC No internal connection FUNCTION TABLE INPUTS DATA G H L L L L A /B X L L H H A X L H X X B X X X L H OUTPUT Y ALS157A SN74AS157 L L H L H ALS158 SN74AS158 H H L H L
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.
Copyright © 1994, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
2Y GND NC 3Y 3B
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SN54ALS157A, SN54ALS158 SN74ALS157A, SN74ALS158, SN74AS157, SN74AS158 QUAD 1-OF-2 DATA SELECTORS/MULTIPLEXERS
SDAS081C APRIL 1982 REVISED DECEMBER 1994
logic symbols
ALS157A, SN74AS157 15 G A /B 1A 1B 2A 2B 3A 3B 4A 4B 2 3 5 6 11 10 14 13 12 4Y 9 3Y 7 2Y 1 1 1 EN G1 MUX 4 15 G A /B 1A 1Y 1B 2A 2B 3A 3B 4A 4B 2 3 5 6 11 10 14 13 12 4Y 9 3Y 7 2Y 1 1 1 ALS158, SN74AS158 EN G1 MUX 4
1Y
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages.
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54ALS157A, SN54ALS158 SN74ALS157A, SN74ALS158, SN74AS157, SN74AS158 QUAD 1-OF-2 DATA SELECTORS/MULTIPLEXERS
SDAS081C APRIL 1982 REVISED DECEMBER 1994
logic diagrams (positive logic)
ALS157A 1A 2 4 1B 3 1A 1Y 1B 2 4 3 1Y ALS158
2A
5 7
2A 2Y 2B
5 7 6 2Y
2B
6
3A
11 9
3A 3Y 3B
11 9 10 3Y
3B
10
4A
14 12
4A 4Y 4B G A /B
14 12 13 15 1 4Y
4B G A /B
13 15 1
SN74AS157 1A 2 4 1B 2A 3 1Y 1B 2A 7 2B 3A 6 2Y 2B 3A 9 3B 10 3Y 3B 1A 2
SN74AS158
4 3
1Y
5
5 7 6 2Y
11
11 9 10 3Y
4A
14 12 4Y
4A
14 12 4Y
4B G A /B
13 15 1
4B G A /B
13 15 1
Pin numbers shown are for the D, J, and N packages.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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