The 74HC390N,652 is an integrated circuit (IC) component that belongs to the 74HC family of high-speed CMOS logic devices. It is a dual 4-bit decade ripple counter with reset, which means it can count in both up and down modes.
Key features of the 74HC390N,652 include:
1. Dual 4-bit Decade Counter: The IC has two separate 4-bit counters that can count from 0 to 9 in binary-coded decimal (BCD) format independently. Each counter has separate clock inputs, and the count outputs are available for external use.
2. Up and Down Counting: The IC supports counting in both up and down modes. The direction of counting can be controlled using the up/down input pin. In the up mode, the counters increment their values on each clock pulse, while in the down mode, the counters decrement their values.
3. Synchronous Operation: The 74HC390N,652 operates synchronously, meaning that the internal state of the counters is updated simultaneously with the clock edge. This avoids any glitches or inaccuracies that may occur during asynchronous operations.
4. Ripple Clock Output: The IC has a ripple clock output that generates a cascading signal for connecting multiple counters together. By connecting the ripple clock output of one IC to the clock input of another IC, it is possible to create a multi-digit counter or expand the counting range
