SN74HC139DR

双路 2 线路至 4 线路解码器/多路信号分离器

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1 Features

• Targeted specifically for high-speed memory decoders and data-transmission systems

• Wide operating voltage range of 2 V to 6 V

• Outputs can drive up to 10 LSTTL loads

• Low power consumption, 80-μA max ICC

• Typical tpd = 10 ns

• ±4-mA output drive at 5 V

• Low input current of 1 μA max

• Incorporate two enable inputs to simplify cascading and/or data reception

2 Description

The SNx4HC139 contains two two-to-four decoders with one active low output strobe G. When the outputs of one channel are gated by the strobe input, they are all forced into the high state. When the outputs are not disabled by the strobe input, only the selected output is low while all others are high.