74HC Philips, 74HC Datasheet - Page 11

• Manufacturer Part Number: 74HC
• Description: HCMOS family characteristics
• Manufacturer: Philips

Philips Semiconductors
Test circuit for 74HC
AC waveforms 74HC (continued)
March 1988
handbook, full pagewidth
HCMOS family characteristics
C
R
L
T
=
=
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.
OFF-to-LOW
HIGH-to-OFF
OFF-to-HIGH
LOW-to-OFF
MGK562
OUTPUT
OUTPUT
OUTPUT
ENABLE
handbook, halfpage
GENERATOR
Fig.6 Propagation delays of 3-state outputs.
90%
PULSE
50%
t f
10%
t PLZ
enabled
outputs
t PHZ
Fig.5 Test circuit.
V I
10%
R T
90%
11
o
D.U.T
V CC
of
disabled
outputs
t r
V O
t PZL
t PZH
C L
FAMILY SPECIFICATIONS
MGK565
50%
50 pF
50%
outputs
enabled
V CC
GND