Philips Semiconductors
Product specification
Octal D-type flip-flop with reset;
positive-edge trigger
AC WAVEFORMS
74HC/HCT273
(1) HC : V
M
= 50%; V
I
= GND to V
CC
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.6
Waveforms showing the clock (CP) to output (Q
n
) propagation delays, the clock pulse width output
transition times and the maximum clock pulse frequency.
(1) HC : V
M
= 50%; V
I
= GND to V
CC
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.7
Waveforms showing the master reset (MR) pulse width, the master reset to output (Q
n
) propagation delays
and the master reset to clock (CP) removal time.
The shaded areas indicate when the input is permitted to
change for predictable output performance.
(1) HC : V
M
= 50%; V
I
= GND to V
CC
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.8 Waveforms showing the data set-up and hold times for the data input (D
n
).
September 1993
7
PHILIPS [ NXP SEMICONDUCTORS ]
