器件名称:
74HC157D
功能描述:
Quad 2-input multiplexer
文件大小:
44.04KB 共7页
简 介:
INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications The IC06 74HC/HCT/HCU/HCMOS Logic Package Information The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines 74HC/HCT157 Quad 2-input multiplexer Product specication File under Integrated Circuits, IC06 December 1990 Philips Semiconductors Product specication Quad 2-input multiplexer FEATURES Non-inverting data path Output capability: standard ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT157 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT157 are quad 2-input multiplexers which select 4 bits of data from two sources under the control of a common data select input (S). The four outputs present the selected data in the true (non-inverted) form. The enable input (E) is active LOW. When E is HIGH, all of the outputs (1Y to 4Y) are forced LOW regardless of all other input conditions. 74HC/HCT157 Moving the data from two groups of registers to four common output buses is a common use of the “157”. The state of the common data select input (S) determines the particular register from which the data comes. It can also be used as function generator. The device is useful for implementing highly irregular logic by generating any four of the 16 different functions of two variables with one variable common. The “157” is the……
