Part Number : 74LS191
Function : Synchronous 4-Bit Up/Down Counters With Up/Down Mode Control
Package : SOP 16 Pin Type
Maker : Texas Instruments
Pinouts :
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
Features
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 :
Others datasheet of same file : 74190, 74191, 74LS190, SN54190