ICM7217AIJI

Programmable Timers And Oscillators Overview

The ICM7217AIJI is a fully integrated timer counter and LED display driver manufactured by Harris Corporation. It combines a high-frequency oscillator, decade timebase counter, 8-decade data counter, latches, 7-segment decoder, digit multiplexers, and drivers for large multiplexed LED displays. The device supports frequency counting from DC to 10MHz in standard modes and up to 2MHz in other modes. It features four internal gate times (0.01s, 0.1s, 1s, 10s) for frequency measurement and additional capabilities as a period, unit, or time interval counter. The chip directly drives common anode or cathode LED segments and digits, generating decimal points, interdigit blanking, leading zero blanking, and overflow indications internally.

Programmable Timers And Oscillators Feature Summary

• Integrates timer counter functions with direct LED display driving capability
• Supports multiple measurement modes including frequency, period, and time interval
• Generates internal control signals such as blanking and overflow indicators

Programmable Timers And Oscillators Applications

• Frequency counters
• Period counters
• Time interval measurements

Programmable Timers And Oscillators Procurement Notes

Verify the manufacturer origin carefully, as Harris Corporation's semiconductor assets were acquired by Maxim Integrated, now part of Analog Devices. Ensure the specific suffix 'AIJI' matches the required temperature range and package variant. Confirm RoHS compliance status and check for available datasheets from current authorized distributors rather than legacy Harris sources.

Programmable Timers And Oscillators Selection Notes

Select this component when a single-chip solution for both timing logic and display driving is required. It is suitable for applications needing direct drive of multiplexed LED displays without external decoders. Consider the input frequency limits and gate time options against measurement accuracy requirements. Verify compatibility with common anode or cathode display types before finalizing the design.

Programmable Timers And Oscillators Part Context

The ICM7217 series belongs to a family of multifunction timer counters that integrate display drivers. These devices are designed to simplify the design of digital instruments by reducing component count. The ICM7217 specifically offers enhanced functionality compared to basic counters, supporting various counting modes while maintaining direct interface with LED displays.

Programmable Timers And Oscillators Replacement Considerations

Check for equivalents from Maxim Integrated or Analog Devices, such as the ICM7217A or ICM7217B variants. Renesas Electronics may offer compatible parts like the ICM7228 series. Verify pinout and electrical specifications before substitution.