CD74HC147E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

CD74HC147E属于集成电路（IC）的信号开关多路复用器解码器。由德州仪器制造生产的CD74HC147E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。

1 Features

• Buffered inputs and outputs

• Typical propagation delay: 13ns at VCC = 5V, CL =

15pF, TA = 25oC

• Fanout (over temperature range)

– 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

2 Description

The CDx4HC147 and CD74HCT147 are 9-input

priority encoders. These devices provide the 10-line to

4-line priority encoding function by use of the implied

decimal “zero.”