74HC257 Datasheet – Quad 2-input Multiplexer

Part Number : 74HC257

Function : Quad 2-input multiplexer; 3-state

Manufacturers : NXP Semiconductors.

Pinouts :

74HC257 datasheet

Description :

The 74HC257; 74HCT257 are high-speed Si-gate CMOS devices and are pin compatible
with Low-power Schottky TTL (LSTTL). The 74HC257 and 74HCT257 have 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 S is HIGH. Data appears at the outputs (1Y to 4Y) in true (non-inverting) form from the selected inputs.

The 74HC257 and 74HCT257 are the logic implementation of a 4-pole, 2-position switch, where the position of the switch is determined by the logic levels applied to S. The outputs are forced to a high-impedance OFF-state when OEis HIGH.

Other data sheets within the file :

74HC257D, 74HC257DB, 74HC257N, 74HC257PW

74HC257 Datasheet PDF Download

74HC257 pdf