This data sheet introduces the features and characteristics of the Philips Semiconductors 74HC/HCT191 Presettable synchronous 4-bit binary up/down counter
The Philips 74HC/HCT191 is an integrated circuit designed as a high-speed Si-gate CMOS device that is pin compatible with low power Schottky TTL (LSTTL). It functions as an asynchronously presettable 4-bit binary up/down counter containing four master/slave flip-flops with internal gating and steering logic.
| Propagation delay CP to Qn (typical) | 22 ns |
|---|---|
| Maximum clock frequency | 36 MHz |
| Input capacitance | 3.5 pF |
The maximum clock frequency is 36 MHz.
Each device contains four master/slave flip-flops.