onsemi MC74VHCT257ADG

Multiplexer, AHCT/VHCT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16

Quad 2-Channel Multiplexer (Mux) with 3-State Outputs

Multiplexer 1-Element CMOS 3-ST 8-IN 16-Pin SOIC Rail

AHCT/VHCT e3 74VHCT257 4x 2:1 decoder circuit 7.9ns 200mW 5V 9.9mm

SOP-16 Signal Switches / Encoders & Decoders / Multiplexers ROHS

IC MUX QUAD 2CHAN MULT 16-SOIC

MULTIPLEXERS & DEMULTIPLEXERS;

The MC74VHCT257A is an advanced high speed CMOS quad 2-channel multiplexer fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation. It consists of four 2-input digital multiplexers with common select (S) and enable (OE)bar inputs. When (OE)bar is held High selection of data is inhibited and all the outputs go Low. The select decoding determines whether the A or B inputs get routed to the corresponding Y outputs. The VHCT inputs are compatible with TTL levels. This device can be used as a level converter for interfacing 3.3 V to 5.0 V because it has full 5 V CMOS level output swings. The VHCT257A input structures provide protection when voltages between 0 V and 5.5 V are applied regardless of the supply voltage. The output structures also provide protection when VCC = 0 V. These input and output structures help prevent device destruction caused by supply voltage input/output voltage mismatch battery backup hot insertion etc. The internal circuit is composed of three stages including a buffer output which provides high noise immunity and stable output. The inputs tolerate voltages up to 7 V allowing the interface of 5 V systems to 3 V systems.