Part Number : 74LS191

Function : Synchronous 4-Bit Up/Down Counters With Up/Down Mode Control

Package : SOP 16 Pin Type

Maker : Texas Instruments

Pinouts :
74LS191 datasheet

Description :

The 74190, 74SLS190, 74LS191, and 74191 are synchronous, reversible up/down counters having a complexity of 58 equivalent gates. The '191 and 'LS191 are 4-bit binary counters and the '190 and 'LS190 are BCD counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the steering logic.

Logic Diagram


1. Counts 8-4-2-1 BCD or Binary

2. Single Down/Up Count Control Line

3. Count Enable Control Input

4. Ripple Clock Output for Cascading

5. Asynchronously Presettable with Load Control

6. Parallel Outputs

7. Cascadable for n-Bit Applications


Datasheet PDF Download :

74LS191 pdf

Others datasheet of same file : 74190, 74191, 74LS190, SN54190

2021/03/27 13:52 2021/03/27 13:52