74HCT PHILIPS [NXP Semiconductors], 74HCT Datasheet - Page 12

• Manufacturer Part Number: 74HCT
• Description: HCMOS family characteristics
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
Test circuit for 74HC
HCT TYPES
AC waveforms 74HCT
March 1988
handbook, full pagewidth
HCMOS family characteristics
Switch position
Note
1. For open-drain N-channel outputs t
TEST
t
t
t
t
C
R
PZH
PZL
PHZ
PLZ
L
T
=
=
Fig.8 Input rise and fall times, transition times and propagation delays for combinatorial logic ICs.
load capacitance including jig and probe capacitance
(see AC CHARACTERISTICS for values).
termination resistance should be equal to the output impedance Z
the pulse generator.
SWITCH
GND
V
GND
V
CC
CC
handbook, halfpage
GENERATOR
PULSE
INPUT
OUTPUT
Fig.7 Test circuit for 3-state outputs.
PLZ
and t
V I
t PHL
t THL
10%
90%
PZL
R T
t r
1.3 V
are applicable.
90%
1.3 V
10%
D.U.T
V CC
12
o
of
t f
V O
C L
t PLH
t TLH
R L = 1 k
50 pF
MGK567
FAMILY SPECIFICATIONS
3 V
GND
MGK563
V CC