M74HCT157

The M54/74HCT157 and the M54/74HCT158 are high speed CMOS QUAD 2-CHANNEL MULTIPLEXERs fabricated with silicon gate C2MOS technology. 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 multiplexers with common select and strobe inputs. The HCT158 is an inverting multiplexer while the HCT157 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 M74HCT157 and High in theM74HCT158. The SELECT decoding determines whether the A or B inputs get routed to their corresponding Y outputs. All
inputs of M74HCT157 are equipped with protection circuits against static discharge and transient excess voltage. M54/74HCT devices are designed to directly interface HSC2MOS systems with TTL andNMOScomponents. They are also plug in replacements for LSTTL devices giving a reduction of power consumption.