m74hct640 STMicroelectronics, m74hct640 Datasheet - Page 6

• Manufacturer Part Number: m74hct640
• Description: Ic Transcvr Tri-st 8bit 20dip
• Manufacturer: STMicroelectronics

M74HCT640
TEST CIRCUIT
C
R
R
WAVEFORM 1 : PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)
6/11
t
t
t
PLH
PZL
PZH
L
1
T
= 50pF/150pF or equivalent (includes jig and probe capacitance)
= 1K or equivalent
= Z
, t
, t
, t
OUT
PLZ
PHL
PHZ
of pulse generator (typically 50 )
TEST
SWITCH
Open
GND
V
CC