74HC Philips, 74HC Datasheet - Page 10

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

Philips Semiconductors
HC TYPES
AC waveforms 74HC
AC waveforms 74HC
March 1988
handbook, full pagewidth
HCMOS family characteristics
(1) In Fig.4 the active transition of the clock is going from LOW-to-HIGH and the active level of the forcing signals (SET, RESET
(2) For AC measurements: t
Fig.4
and PRESET) is HIGH. The actual direction of the transition of the clock input and the actual active levels of the forcing signals
are specified in the individual device data sheet.
Fig.3 Input rise and fall times, transition times and propagation delays for combinatorial logic ICs.
Set-up times, hold times, removal times, propagation delays and the maximum clock pulse frequency for
sequential logic ICs.
OUTPUT
PRESET
CLOCK
RESET,
INPUT
INPUT
INPUT
r
DATA
SET,
= t
f
= 6 ns; when measuring f
handbook, halfpage
INPUT
OUTPUT
10 %
50%
t su
t rem
50%
t r
10%
50%
t PLH
90%
t PHL
t THL
t WH
10%
max
90%
50%
90%
t h
, there is no constraint on t
t r
1/f max
t TLH
50%
90%
t f
50%
10%
10
t WL
t su
t f
t PHL
t PLH
t TLH
r
, t
f
with 50% duty factor.
MGK564
t h
FAMILY SPECIFICATIONS
t THL
V CC
GND
MGK569
V CC
GND
V CC
GND
V CC
GND