Datasheet

December 1990 10
Philips Semiconductors Product specification
8-bit parallel-in/serial-out shift register 74HC/HCT165
PACKAGE OUTLINES
See “74HC/HCT/HCU/HCMOS Logic Package Outlines” .
Fig.9 Waveforms showing the set-up and hold times from the serial data input (D
s
) to the clock (CP) and clock
enable (CE) inputs, from the clock enable input (CE) to the clock input (CP) and from the clock input (CP)
to the clock enable input (CE).
CE may change only from HIGH-to-LOW while CP
is LOW.
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.10 Waveforms showing the set-up and hold times from the data inputs (D
n
) to the parallel load input (PL).
(1) HC : V
M
= 50%; V
I
= GND to V
CC
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.