M74HCT257

The M54/74HCT257 and the M54/74HCT258 are high speed CMOSMULTIPLEXERs fabricated with   silicon gate C²MOS technology.

They have the same high speed performance of LSTTL combined with true CMOS low power consumption.

These IC's are composed of an independent 2- channelmultiplexer with commonSELECT and ENABLE INPUT.

The M54/74HCT258 is an inverting multiplexer while the M54/74HCT257 is a non-inverting multiplexer. When the ENABLE INPUT is held "High", outputs of both IC's become high-impedance state. If SELECTINPUTis held "Low", "A" datais selected, when SELECT INPUT is high "H", "B" data is chosen.

All inputs are equipped with protection circuits against static discharge and transient excess voltage.

This integrated circuit M54/74HCT257 and the M54/74HCT258 has input and output characteristics that are fully compatible with 54/74 LSTTL logic families. M54/74HCT devices are designed to directly interface HSC2MOS systems with TTL and NMOS components. They are also plug in replace-