These Schottky-clamped high-performance multiplexers feature TRI-STATE outputs that can interface directly with data lines of bus-organized systems With all but one of the common outputs disabled (at a high impedance state) the low impedance of the single enabled output will drive the bus line to a high or low logic level To minimize the possibility that two.
Y TRI-STATE versions LS157 and LS158 with same pinouts
Y Schottky-clamped for significant improvement in A-C performance
Y Provides bus interface from multiple sources in highperformance systems
Y Average propagation delay from data input 12 ns
Y Typical power dissipation LS257B 50 mW LS258B 35 mW
Y Alternate military aerospace devices (54LS257A 54LS258A) are available Contact a National Semiconductor Sales Office Distributor for specifications
Connection Diagrams
Dual-In-Line Package
Dual-In-Line Package
TL F 6417
– 1
Order Number 54LS257ADMQB 54LS257AFMQB 54LS257ALMQB DM54LS257BJ DM54LS25.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | 54LS258B |
National Semiconductor |
Quad 2-Data Selectors/Multiplexers | |
2 | 54LS258B |
Motorola |
QUAD 2-INPUT MULTIPLEXER | |
3 | 54LS258B |
Texas Instruments |
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | |
4 | 54LS256 |
National Semiconductor |
Dual 4-Bit Addressable Latch | |
5 | 54LS256 |
Motorola |
DUAL 4-BIT ADDRESSABLE LATCH | |
6 | 54LS257A |
National Semiconductor |
TRI-STATE Quad 2-Data Selectors/Multiplexers | |
7 | 54LS257B |
National Semiconductor |
Quad 2-Data Selectors/Multiplexers | |
8 | 54LS257B |
Motorola |
QUAD 2-INPUT MULTIPLEXER | |
9 | 54LS257B |
Texas Instruments |
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | |
10 | 54LS20 |
National Semiconductor |
Dual 4-Input NAND Gates | |
11 | 54LS21 |
National Semiconductor |
Dual 4-Input AND Gates | |
12 | 54LS21 |
Motorola |
DUAL 4-INPUT AND GATE |