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 propagati.
57A, SN74ALS158, SN74AS157, SN74AS158 . . . D OR N PACKAGE (TOP VIEW) A /B 1 1A 2 1B 3 1Y 4 2A 5 2B 6 2Y 7 GND 8 16 VCC 15 G 14 4A 13 4B 12 4Y 11 3A 10 3B 9 3Y SN54ALS157A, SN54ALS158 . . . FK PACKAGE (TOP VIEW) VCC G NC A/B 1A 1B 3 2 1 20 19 4 18 4A 1Y 5 17 4B NC 6 16 NC 2A 7 15 4Y 2B 8 14 3A 9 10 11 12 13 3B 3Y NC GND 2Y NC − No internal connection FUNCTION TABLE INPUTS OUTPUT Y G A /B DATA AB ′ALS157A ′ALS158 SN74AS157 SN74AS158 HXXX L H LLLX L H L LHX H L L HX L L H LHXH H L PRODUCTION DATA information is current as of publication date. Pr.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | SN74AS151 |
Texas Instruments |
1-of-8 Data Selectors/Multiplexers | |
2 | SN74AS153 |
Texas Instruments |
Dual 1-of-4 Data Selectors/Multiplexers | |
3 | SN74AS158 |
Texas Instruments |
Quadruple 1-of-2 Data Selectors/Multiplexers | |
4 | SN74AS10 |
Texas Instruments |
Triple 3-Input Positive-NAND Gate | |
5 | SN74AS1000A |
Texas Instruments |
Quadruple 2-Input Positive-NAND Buffers/Drivers | |
6 | SN74AS1004A |
Texas Instruments |
HEX INVERTING Deiver | |
7 | SN74AS1008A |
Texas Instruments |
QUADRUPLE 2-INPUT POSITIVE-AND BUFFER/DRIVER | |
8 | SN74AS1032A |
Texas Instruments |
Quadruple 2-Input Positive-OR Buffers/Drivers | |
9 | SN74AS1034A |
Texas Instruments |
Hex Drivers | |
10 | SN74AS109A |
Texas Instruments |
Dual J-K Positive-Edge-Triggered Flip-Flop | |
11 | SN74AS11 |
Texas Instruments |
TRIPLE 3-INPUT POSITIVE-AND GATE | |
12 | SN74AS136 |
Texas Instruments |
QUADRUPLE 2-INPUT EXCLUSIVE-OR GATE |