The 74HC157 is identical in pinout to the LS157. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. This device routes 2 nibbles (A or B) to a single port (Y) as determined by the Select input. The data is presented at the outputs in non inverted form. A high level on the Output Enable input sets all four Y outputs to a low level. The 74HC157 is similar in function to the HC257 which has 3–state output.
Features:-
- Output Drive Capability: 10 LSTTL Loads
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Operating Voltage Range: 2.0 to 6.0 V
- Low Input Current: 1.0 µA
- High Noise Immunity Characteristic of CMOS Devices
- In Compliance with the Requirements Defined by JEDEC Standard No. 7A
- Chip Complexity: 82 FETs or 20.5 Equivalent Gat
Specification:-
| Symbol | Parameter | Value | Unit |
| VCC | Supply Voltage | − 0.5 to + 7.0V | V |
| VIN | DC Input Voltage | − 1.5 to VCC + 1.5V | V |
| VOUT | DC Output Voltage | − 0.5 to VCC + 0.5V | V |
| IIK, IOK | Clamp Diode Current | ± 20 | mA |
| IOUT | DC Output Current, per pin | ± 25 | mA |
| ICC | DC VCC or GND Current, per pin | ± 50 | mA |
| TSTG | Storage Temperature Range | − 65°C to + 150 | °C |
| PD | Power Dissipation | 500 | mW |
| TL | Lead Temperature | 260 | °C |
* product image for illustration purposes only. actual product may vary.
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