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Future Electronics Egypt

74HC191 (4-Bit Counter)

74HC191 (4-Bit Counter)

LE 5.00

The 74HC191 are asynchronously presettable 4-bit binary up/down counters. They contain four master/slave flip-flops with internal gating and steering logic to provide asynchronous preset and synchronous count-up and count-down operation.


  • Synchronous reversible counting
  • Asynchronous parallel load
  • Count enable control for synchronous expansion
  • Single up/down control input
  • Output capability: standard

74HC191 datasheet