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74AHC257

nexperia
Part Number 74AHC257
Manufacturer nexperia
Description Quad 2-input multiplexer
Published Jul 24, 2019
Detailed Description 74AHC257; 74AHCT257 Quad 2-input multiplexer; 3-state Rev. 02 — 9 May 2008 Product data sheet 1. General description ...
Datasheet PDF File 74AHC257 PDF File

74AHC257
74AHC257

Overview
74AHC257; 74AHCT257 Quad 2-input multiplexer; 3-state Rev.
02 — 9 May 2008 Product data sheet 1.
General description The 74AHC257; 74AHCT257 is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL).
It is specified in compliance with JEDEC standard No.
7-A.
The 74AHC257; 74AHCT257 has four identical 2-input multiplexers with 3-state outputs, which select 4 bits of data from two sources and are controlled by a common data select input (S).
The data inputs from source 0 (1I0 to 4I0) are selected when input S is LOW and the data inputs from source 1 (1I1 to 4I1) are selected when input S is HIGH.
Data appears at the outputs (1Y to 4Y) in true (non-inverting) form from the selected inputs.
The 74AHC257; 74AHCT257 is the logic implementation of a 4-pole 2-position switch, where the position of the switch is determined by the logic levels applied to input S.
The outputs are forced to a high-impedance OFF-state when OE is HIGH.
The logic equations for th...


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