The HEF4520BT,652 is an integrated circuit (IC) component that belongs to the HEF family of CMOS dual binary counters. It is a high-speed device that is commonly used in digital applications for counting and timekeeping purposes. The IC incorporates two independent 4-bit binary counters, which can be cascaded together for creating larger counter lengths.
Here are some key features and specifications of the HEF4520BT,652:
1. High-Speed Operation: The IC has a maximum clock frequency of 25 MHz, which allows for fast counting and timekeeping operations in digital circuits.
2. Dual 4-bit Binary Counters: The component contains two 4-bit binary counters that can operate independently or can be cascaded together to create a longer counting sequence.
3. Synchronous Counting: The counters perform synchronous counting, meaning all counter stages change simultaneously upon each clock pulse. This ensures accurate and synchronized counting operations.
4. Ripple Carry Output: The IC provides a ripple carry output (RCO) that allows for cascading multiple counter stages together for creating larger counter lengths.
5. Asynchronous Reset: The component includes an asynchronous reset (RESET) input, which can be used to reset the counters to an initial state manually.
6. Schmitt-triggered Inputs: The IC features Schmitt-triggered inputs, which provide improved noise immunity and make the component more reliable in noisy environments
