1. General description

The 74HC139; 74HCT139 decodes two binary weighted address inputs (nA0, nA1) to four mutually

exclusive outputs (nY0 to nY3). Each decoder features an enable input (nE). When nE is HIGH all

outputs are forced HIGH. The enable input can be used as the data input for a 1-to-4 demultiplexer

application. Inputs include clamp diodes. This enables the use of current limiting resistors to

interface inputs to voltages in excess of VCC.

2. Features and benefits

• Input levels:

• For 74HC139: CMOS level

• For 74HCT139: TTL level

• Demultiplexing capability

• 2 independent 2-to-4 decoders

• Multifunction capability

• Suitable for memory decoding, data routing or code conversion

• Complies with JEDEC standard no. 7A

• Active LOW mutually exclusive outputs

• ESD protection:

• • HBM JESD22-A114F exceeds 2000 V

• MM JESD22-A115-A exceeds 200 V

• Specified from -40 °C to +85 °C and from -40 °C to +125 °C

74HCT139PW属于集成电路（IC） > 信号开关，多路复用器，解码器。安世半导体(中国)有限公司制造生产的74HCT139PW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。