M54HC157/158 M74HC157/158 are high speed CMOS QUAD 2-CHANNEL MULTI- PLEXER’s fabricated with silicon gate C2MOS tech- nology. They achieve the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. These devices consist of four 2-input digital multi- plexers with common select and strobe inputs. The HC158 is an inverting multiplexer while the HC157 is a non-inverting multiplexer. When the STROBE input is held High, selection of data is inhibited and all the outputs become Low in the M74HC157 and High in the M74HC158. The SELECT decoding determines whether the A or B inputs get routed to their corresponding Y outputs. All inputs are equipped with protection circuits against static dis- charge and transient.
This document describes the SGS-THOMSON M54HC157/158 and M74HC157/158 series of high-speed CMOS quad 2-channel multiplexers. These devices are fabricated with silicon gate CMOS technology to achieve operation speeds similar to LSTTL while maintaining low power dissipation.
| Propagation Delay (Typical) | 10 ns |
|---|---|
| Output Drive Capability | 10 LSTTL Loads |
| Supply Voltage Range (M54HC) | -55 to +125 °C |
| Power Dissipation (Max) | 500 mW |
The maximum power dissipation is 500 mW at a temperature of 65°C.
When the STROBE input is held High, all outputs become Low for the M74HC157 and High for the M74HC158.