M74HCT139 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

生产厂家

M74HCT139

DUAL 2 TO 4 DECODER/DEMULTIPLEXER

STMicroelectronics 

TEST CIRCUIT

M74HCT139

CL = 50pF or equivalent (includes jig and probe capacitance)

RT = ZOUT of pulse generator (typically 50Ω)

WAVEFORM : PROPAGATION DELAY TIMES (f=1MHz; 50% duty cycle)

5/9

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