CD74HC139 - 高速 CMOS 逻辑双路 2 至 4 线路解码器/多路解复用器

CD74HC139是TI德州仪器公司的一款解码器/编码器/多路复用器产品，CD74HC139是高速 CMOS 逻辑双路 2 至 4 线路解码器/多路解复用器，本站介绍了CD74HC139的封装应用图解、特点和优点、功能等，并给出了与CD74HC139相关的TI元器件型号供参考。

CD74HC139 - 高速 CMOS 逻辑双路 2 至 4 线路解码器/多路解复用器 - 解码器/编码器/多路复用器 - 特殊逻辑 - 德州仪器

产品描述

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.

产品特性

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 . . . -55°C to 125°C
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

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