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Part Name
Description
M74HCT640 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M74HCT640
OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS (INVERTED)
STMicroelectronics
M74HCT640 Datasheet PDF : 11 Pages
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M74HCT640
TEST CIRCUIT
TEST
t
PLH
, t
PHL
t
PZL
, t
PLZ
t
PZH
, t
PHZ
C
L
= 50pF/150pF or equivalent (includes jig and probe capacitance)
R
1
= 1K
Ω
or equivalent
R
T
= Z
OUT
of pulse generator (typically 50
Ω
)
WAVEFORM 1 : PROPAGATION DELAY TIME
(f=1MHz; 50% duty cycle)
SWITCH
Open
V
CC
GND
6/11
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