The HCF4022B is a 4-stage Johnson counter with 8 decoded outputs. Inputs include a CLOCK, a RESET, and a CLOCK INHIBIT signal. Schmitt trigger action in the clock input circuit provides pulse shaping that allows unlimited clock input pulse rise and fall times. This counter is advanced one count at the positive clock signal transition if the CLOCK INHIBIT signal is low. Counter advanced via the clock line is inhibited when the CLOCK INHIBIT signal is high. A high RESET signal clears the counter to its zero count. Use of the Johnson decade-counter configuration permits high speed operation, 2-input decimal decode gating and spike-free decoded outputs. Anti-lock gating is provided, thus assuring proper counting sequence. The decoded outputs are normally low and go high only at their respective decoded time slot. Each decoded output remains high for one full clock cycle. A CARRY-OUT signal completes one cycle.
The HCF4022B is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology. It functions as a 4-stage Johnson counter featuring 8 decoded outputs, along with inputs for CLOCK, RESET, and CLOCK INHIBIT signals. The device supports medium speed operation up to 10 MHz at Vpp = 10V.
| Operating Temperature Range | -55 to +125 °C |
|---|---|
| Maximum Clock Frequency (Vcc=10V) | 10 MHz |
| Package Types | DIP and SOP |
The device supports medium speed operation up to 10 MHz when Vpp = 10V.
The counter has 8 decoded outputs.
A high RESET signal clears the counter to its zero count.