器件名称:
74HCT253DB
功能描述:
Dual 4-input multiplexer; 3-state
文件大小:
50.05KB 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/HCT253 Dual 4-input multiplexer; 3-state Product specication File under Integrated Circuits, IC06 December 1990 Philips Semiconductors Product specication Dual 4-input multiplexer; 3-state FEATURES Non-inverting data path 3-state outputs for bus interface and multiplex expansion Common select inputs Separate output enable inputs Output capability: bus driver ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT253 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. 74HC/HCT253 The 74HC/HCT253 have two identical 4-input multiplexers with 3-state outputs which select two bits from four sources selected by common data select inputs (S0, S1). When the individual output enable (1OE, 2OE) inputs of the 4-input multiplexers are HIGH, the outputs are forced to the high impedance OFF-state. The “253” is the logic implementation of a 2-pole, 4-position switch, where the position of the switch is determined by the logic levels applied to S0 and S1. The logic equations for the outputs are: 1Y = 1OE(1l0.S1.S0+1I1.S1.S0+1I2.S1.S0+1I3.S1.S0) 2Y = 2OE(2l0.S1.S0+2I1.S1.S0+2I2.S1.S0+2I3.S1.S0) APPLICATIONS Data selectors Data multipl……
