M74HCT643B1R View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

M74HCT643B1R

OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS (INVERTED/NON INVERTED)

STMicroelectronics 

M74HCT643

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)

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

SWITCH

Open

VCC

GND

6/11

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