ICM7211AM 4-Digit, LCD Display Driver
The ICM7211AM is a non‑multiplexed four‑digit seven‑segment LCD display decoder‑driver that includes a complete RC oscillator, divider chain, backplane driver, and 28 segment outputs. It offers a microprocessor‑compatible interface with data and digit address latches controlled by high‑speed chip‑select inputs, and outputs the “Code B” character set (0‑9, dash, E, H, L, P, blank).
The datasheet details ordering information, absolute maximum ratings, operating conditions, thermal data, electrical specifications, pinouts, timing diagrams, and typical application circuits. It also describes the internal operation, backplane synchronization options, and guidelines for using Pb‑free, RoHS‑compliant packages.
| Operating Supply Voltage Range (VPP‑VSS) | 3 V to 6 V |
|---|---|
| Oscillator Frequency (free‑run) | ≈ 19 kHz |
| Backplane Frequency | ≈ 150 Hz |
| Operating Current (display blank) | 10 pA to 50 pA |
| Input Leakage Current (pins 27‑34) | 0.01 pA to 1 pA |
It provides “Code B” output, which includes the characters 0‑9, dash, E, H, L, P, and blank.
The device has 28 individual segment outputs plus a backplane driver.
Yes, Pb‑free plus anneal versions are offered and are RoHS compliant.