74HC/HCT191 Philips Semiconductors (Acquired by NXP), 74HC/HCT191 Datasheet - Page 14

• Manufacturer Part Number: 74HC/HCT191
• Description: Presettable Synchronous 4-bit Binary Up/down Counter
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
PACKAGE OUTLINES
See
December 1990
Presettable synchronous 4-bit binary
up/down counter
Fig.16 Waveforms showing the set-up and hold times from the parallel load input (PL) to the data input (D
Fig.17 Waveforms showing the set-up and hold times from the count enable and up/down inputs (CE, U/D) to the
“74HC/HCT/HCU/HCMOS Logic Package Outlines”
The shaded areas indicate when the input is
permitted to change for predictable output
performance.
(1) HC : V
The shaded areas indicate when the input is
permitted to change for predictable output
performance.
(1) HC : V
HCT : V
HCT : V
clock (CP).
M
M
M
M
= 50%; V
= 1.3 V; V
= 50%; V
= 1.3 V; V
I
I
I
I
= GND to V
= GND to V
= GND to 3 V.
= GND to 3 V.
CC
CC
.
.
.
14
74HC/HCT191
Product specification
n
).