M74HC253 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

比赛名单

M74HC253

DUAL 4 CHANNEL MULTIPLEXER 3 STATE OUTPUT

STMicroelectronics 

M74HC253

TEST CIRCUIT

TEST

tPLH, tPHL

tPZL, tPLZ

tPZH, tPHZ

CL = 50pF/150pF or equivalent (includes jig and probe capacitance)

R1 = 1KΩ or equivalent

RT = ZOUT of pulse generator (typically 50Ω)

SWITCH

Open

VCC

GND

6/11

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