CD74HC139E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

CD74HC139E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CD74HC139E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

• Multifunction Capability

- Binary to 1 of 4 Decoders or 1 to 4 Line

Demultiplexer

• Active Low Mutually Exclusive 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

• Memory Decoding, Data Routing, Code Conversion

Description

The ’HC139 and ’HCT139 devices contain two independent

binary to one of four decoders each with a single active low

enable input (1E or 2E). Data on the select inputs (1A0 and

1A1 or 2A0 and 2A1) cause one of the four normally high

outputs to go low.

If the enable input is high all four outputs remain high. For

demultiplexer operation the enable input is the data input.

The enable input also functions as a chip select when these

devices are cascaded. This device is functionally the same

as the CD4556B and is pin compatible with it.

The outputs of these devices can drive 10 low power

Schottky TTL equivalent loads. The HCT logic family is

functionally as well as pin equivalent to the LS logic family.