Part Number : DM74LS191N
Function : Synchronous 4-Bit Binary Counter
Package : DIP 16 Pin Type
Maker : Fairchild Semiconductor
Image : 
Description :
The DM74LS191N, DM74LS191 circuit is a synchronous, reversible, up/down counter. Synchronous operation is provided by having all flip-flops clocked simultaneously, so that the outputs change simultaneously when so instructed by the steering logic. This mode of operation eliminates the output count ing spikes normally associated with asynchronous (ripple clock) counters.
Block Diagram
Features
1. Ripple clock output for cascading
2. Asynchronously presettable with load control
3. Parallel outputs
4. Cascadable for n-bit applications
5. Average propagation delay 20 ns
6. Typical clock frequency 25 MHz
7. Typical power dissipation 100 mW
Datasheet PDF Download : 
Others datasheet of same file :
74LS191, 74LS191M, 74191N, DM74LS191, DM74LS191M
