Product Overview

Product Overview
MC74VHCT257A: Quad 2-Channel Multiplexer (Mux) with 3-State Outputs
For complete documentation, see the data sheet
Product Description
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.
Features
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High Speed: tPD = 4.1ns (Typ) at VCC = 5V
Low Power Dissipation: ICC = 4<FONT FACE=SYMBOL>m</FONT>A (Max) at TA = 25°C
TTL-Compatible Inputs: VIL = 0.8 V; VIH = 2.0 V
Power Down Protection Provided on Inputs and Outputs
Balanced Propagation Delays
Designed for 2V to 5.5V Operating Range
Low Noise: VOLP = 0.8V (Max)
Pin and Function Compatible with Other Standard Logic Families
Latchup Performance Exceeds 300mA
ESD Performance: HBM > 2000V; Machine Model > 200V
For more features, see the data sheet
Part Electrical Specifications
Product
MC74VHCT257ADG
Compliance
Status
Channels
Output
VCC Min (V)
VCC Max (V)
tpd Max (ns)
IO Max (mA)
Package Type
Pb-free
Active
4
3-State
4.5
5.5
7.9
8
SOIC-16
Active
4
3-State
4.5
5.5
7.9
8
SOIC-16
Active
4
3-State
4.5
5.5
7.9
8
TSSOP-16
Halide free
MC74VHCT257ADR2G
Pb-free
Halide free
MC74VHCT257ADTG
Pb-free
Halide free
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016