CD74HC253集成电路（IC）的信号开关多路复用器解码器规格书PDF中文资料

CD74HC253属于集成电路（IC）的信号开关多路复用器解码器。由美国德州仪器公司制造生产的CD74HC253信号开关，多路复用器，解码器逻辑型信号开关、多路复用器和编码器 IC 可用于对以数字格式表示数据的电信号进行路由和选择。这些器件与设计用于模拟信号的类似产品有所不同，它们保留的信息表示为两个电状态之一，而不是两个外部界限内的无穷变化量。

Features

• Common Select Inputs

• Separate Output-Enable Inputs

• Three-State Outputs

• Fanout (Over Temperature Range)

- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

• Wide Operating Temperature Range . . . -55oC to 125oC

• Balanced Propagation Delay and Transition Times

• Significant Power Reduction Compared to LSTTL

Logic ICs

• HC Types

- 2V to 6V Operation

- High Noise Immunity: NIL = 30%, NIH = 30% of VCC

at VCC = 5V

• HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

VIL= 0.8V (Max), VIH = 2V (Min)

- CMOS Input Compatibility, Il ≤ 1μA at VOL, VOH

Description

The CD74HC253 and CD74HCT253 are dual 4-to-1 line

selector/multiplexers having three-state outputs. One of four

sources for each section is selected by the common select

inputs, S0 and S1. When the output enable (1OE, 2OE) is

HIGH, the output is in the high-impedance state.