m74hc251 STMicroelectronics, m74hc251 Datasheet - Page 6

• Manufacturer Part Number: m74hc251
• Description: 8-channel Multiplexer 3-state
• Manufacturer: STMicroelectronics

M74HC251
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