The Intersil ICM7228 is an 8-bit microprocessor-compatible LED display decoder driver that can interface with an 8-digit, 7-segment, numeric LED display.
The ICM7228 is an 8‑digit, 7‑segment LED display decoder driver that interfaces microprocessors to numeric LED displays. It includes two decoder types, multiplex scan circuitry, segment and digit drivers, and an 8‑byte static RAM. Variants support common‑anode, common‑cathode, hexadecimal, Code B, and No‑Decode modes, allowing flexible segment control and bar‑graph displays.
The document provides functional block diagrams, absolute maximum ratings, electrical specifications, timing diagrams, pin‑out tables, and package dimensions for PDIP and SOIC versions. It also lists typical performance curves, ordering information, and application examples such as instrumentation and handheld devices.
| Write Access Time | 200 ns |
|---|---|
| Quiescent Supply Current (Shutdown, ICM7228A/B) | 100 µA |
The ICM7228A and ICM7228C drive common‑anode displays, while the ICM7228B drives common‑cathode displays.
The device is offered in 28‑lead PDIP and 28‑lead SOIC packages.
The write access time is 200 ns.