These devices contain two independent 4-input positive-NAND gates. They perform the Boolean functions Y = A • B • C • D or Y = A + B + C + D in positive logic. The SN54ALS20A and SN54AS20 are characterized for operation over the full military temperature range of − 55°C to 125°C. The SN74ALS20A and SN74AS20 are characterized for operation from 0°C to 70°C. .
X X L H 3 2 1 20 19 NC 4 18 2C NC 5 17 NC 1C 6 16 NC NC 7 15 NC 1D 8 14 2B 9 10 11 12 13 2A 2Y NC GND 1Y NC − No internal connection logic symbol† logic diagram (positive logic) 1 1A & 2 1B 4 1C 5 1D 9 2A 10 2B 12 2C 13 2D 6 1Y 8 2Y † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages. 1A 1 2 1B 1C 4 5 1D 9 2A 10 2B 2C 12 13 2D 6 1Y 8 2Y PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments stan.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | SN54AS21 |
Texas Instruments |
Dual 4-Input Positive-AND Gate | |
2 | SN54AS240A |
Texas Instruments |
OCTAL BUFFERS/DRIVERS | |
3 | SN54AS241A |
Texas Instruments |
Octal Buffers/Drivers | |
4 | SN54AS244A |
Texas Instruments |
OCTAL BUFFERS AND LINE DRIVER | |
5 | SN54AS245 |
Texas Instruments |
OCTAL BUS TRANSCEIVER | |
6 | SN54AS27 |
Texas Instruments |
Triple 3-Input Positive-NOR Gate | |
7 | SN54AS286 |
Texas Instruments |
9-Bit Parity Generators/Checker | |
8 | SN54AS00 |
Texas Instruments |
Quadruple 2-Input Positive-NAND Gates | |
9 | SN54AS02 |
Texas Instruments |
Quadruple 2-Input Positive-NOR Gates | |
10 | SN54AS04 |
Texas Instruments |
Hex Inverters | |
11 | SN54AS08 |
Texas Instruments |
Quadruple 2-Input Positive-AND Gates | |
12 | SN54AS10 |
Texas Instruments |
Triple 3-Input Positive-NAND Gate |