Product Introduction

The SN74LS191N is a synchronous preset Down/Up sixteen binary counter (0-15 count).It consists of 4 JK flip flops and other gate circuits.There is a low efficient asynchronous enabling preset (Load) that can preset input data (A/B/C/D) directly to the output.A stop count enables the control end (G) to remain unchanged after stopping counting.An addition and subtractionCounter control terminal (Down/Up). It can realize continuous adding cycle counting or continuous subtracting cycle counting, and can realize multi-chip cascade expansion with overflow carry output flag RC (low output efficiency) and overflow flag Max/Min (high output efficiency).

Product Features

●Synchronous preset Down/Up decimal counter (0-15 count)
●With overflow flag, multiple cascading extensions can be implemented
●Clock rising edge effective
●Fully compatible with TTL/DTL input and output logic level
●A add / minus Counter control terminal (Down/Up)
●Package format: DIP16, SOP16

Product Applications

●Digital / count logic driver
●Industrial control application
●Other application areas