The CD74HC390EE4 is an IC (integrated circuit) component belonging to the 74HC series, manufactured by Texas Instruments. It is a 4-bit dual decade ripple counter with separate clock, asynchronous clear, and reset inputs. This versatile counter IC provides high-speed counting solutions for various digital applications. Let's explore its key features and functionalities:
1. Dual Decade Counter: The CD74HC390EE4 consists of two independent 4-bit decade counters, allowing it to count up to 99 in decimal or FF in hexadecimal.
2. High-Speed Operation: This IC is designed for high-performance applications, offering clock frequencies up to 32 MHz (typical) and propagation delays as low as 13 ns.
3. Ripple Counter: The CD74HC390EE4 is a ripple counter, meaning the carry-out of each decade counter is connected to the clock input of the subsequent decade counter. This chaining enables extended counting.
4. Asynchronous Clear and Reset: The IC features individual asynchronous clear (CLR) and reset (RST) inputs, allowing the user to set the counters to a specific value while they are counting or reset/hold their current count.
5. Cascadable: The ripple counter structure facilitates easy cascading of multiple ICs. By connecting the carry-out (CO) output of one CD74HC390EE4 to the clock input of the next IC, expanded counting can be achieved
