December 1990 15
Philips Semiconductors Product specification
Triple 2-channel analog
multiplexer/demultiplexer with latch
74HC/HCT4353
TEST CIRCUIT AND WAVEFORMS
Fig.21 Test circuit for measuring AC performance.
Conditions
TEST SWITCH V
is
t
PZH
t
PZL
t
PHZ
t
PLZ
others
V
EE
V
CC
V
EE
V
CC
open
V
CC
V
EE
V
CC
V
EE
pulse
FAMILY AMPLITUDE V
M
t
r
;t
f
f
max
;
PULSE WIDTH
OTHER
74HC V
CC
50% < 2 ns 6 ns
74HCT 3.0 V 1.3 V < 2 ns 6 ns
C
L
= load capacitance including jig and probe capacitance (see AC CHARACTERISTICS for values).
R
T
= termination resistance should be equal to the output impedance Z
O
of the pulse generator.
t
r
=t
f
= 6 ns; when measuring f
max
, there is no constraint on t
r
, t
f
with 50% duty factor.
Fig.22 Input pulse definitions.
Conditions
TEST SWITCH V
is
t
PZH
t
PZL
t
PHZ
t
PLZ
others
V
EE
V
CC
V
EE
V
CC
open
V
CC
V
EE
V
CC
V
EE
pulse
FAMILY AMPLITUDE V
M
t
r
;t
f
f
max
;
PULSE WIDTH
OTHER
74HC V
CC
50% < 2 ns 6 ns
74HCT 3.0 V 1.3 V < 2 ns 6 ns
C
L
= load capacitance including jig and probe capacitance (see AC CHARACTERISTICS for values).
R
T
= termination resistance should be equal to the output impedance Z
O
of the pulse generator.
t
r
=t
f
= 6 ns; when measuring f
max
, there is no constraint on t
r
, t
f
with 50% duty factor.
