Maxim Integrated ICM7217CIPI 4-Digit, Presettable LED Up/Down Counter

The ICM7217CIPI from Maxim Integrated is a high-performance, 4-digit, fully integrated counter IC designed for numeric display applications. This versatile chip is capable of functioning as a presettable 4-digit up/down counter with a built-in decoder and a 7-segment LED driver for each digit. Its robust design makes it suitable for a wide range of applications, including industrial controls, panel meters, and digital timers.

One of the key features of the ICM7217CIPI is its ability to interface directly with 7-segment displays. Each digit includes an automatic blanking function, zero suppression, and a multiplex scan circuitry, which simplifies the process of connecting multiple digits and reduces the number of external components required. The chip can be easily programmed via its parallel interface, allowing users to preset the counter to a specific value or to read the counter's value at any given time.

The ICM7217CIPI operates on a single 5V supply, making it compatible with most TTL and CMOS logic levels. It also features an internal oscillator that can be externally controlled, providing flexibility in setting the scan rate for the display. The counter increments or decrements on each positive edge of the input signal, and the count range is from 0000 to 9999 for the up counter and from 9999 to 0000 for the down counter.

Additional functionality includes a HOLD input that allows the user to freeze the display, a CARRY/ BORROW output that can be used for cascading multiple counters, and a RESET input that clears the counter to its preset state. The ICM7217CIPI is available in a 28-pin plastic DIP package, ensuring easy integration into a variety of designs.

Overall, the ICM7217CIPI is a reliable and user-friendly solution for designers looking to implement a counter display in their projects. With its built-in features and ease of use, it offers a cost-effective and efficient option for managing numerical data in electronic systems.