HCF40103B is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology. It consists of an 8-stage synchronous down counter with a single output that is active when the internal count is zero. This device contains a single 8-bit binary counter. It has control inputs for enabling or disabling the clock, for clearing the counter to its maximum count, and for presetting the counter either synchronously or asynchronously. All control inputs and the CARRY-OUT/ZERO DETECT output are active-low logics. In normal operation, the counter is decremented by one count on each positive transition of the CLOCK. Counting is inhibited when the CARRY-IN/COUNTER ENABLE (CI/ CE) input is high. The CARRY-OUT/ZERO DETECT (CO/ZD) output goes low when the count reaches zero if the CI/CE input is low, and remains low for one full clock period. When the SYNCHRONOUS PRESET ENABLE (SPE) input is low, data at the JAM input is clocked into the counter on the next positive clock transition regardless of the state of the CI/CE input.
The HCF40103B is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology, available in DIP and SOP packages. It consists of an 8-stage synchronous down counter with a single output that is active when the internal count is zero. The device includes control inputs for enabling or disabling the clock, clearing the counter to its maximum count, and presetting the counter either synchronously or asynchronously.
| Supply Voltage | 3 to 20 V |
|---|---|
| Operating Temperature | -55 to +125 °C |
| Quiescent Current (Max) | 3000 µA |
| Input Leakage Current | ±10 µA |
| Package Types | DIP and SOP |
It is an 8-stage synchronous down counter with a single output active when the internal count is zero.
Data at the JAM inputs can be clocked in synchronously or forced asynchronously depending on the SPE and APE inputs.
The counter is asynchronously cleared to its maximum count (255) regardless of the state of any other input.