74hct191 NXP Semiconductors, 74hct191 Datasheet - Page 7

• Manufacturer Part Number: 74hct191
• Description: Presettable Synchronous 4-bit Binary Up/down Counter
• Manufacturer: NXP Semiconductors

Philips Semiconductors
December 1990
Presettable synchronous 4-bit binary
up/down counter
Sequence
Load (preset) to binary thirteen;
count up to fourteen, fifteen,
inhibit;
count down to one, zero, fifteen,
Fig.8
zero, one and two;
fourteen and thirteen.
Typical load, count and
inhibit sequence.
Fig.9 Logic diagram.
7
74HC/HCT191
Product specification