The MAX388 (single‑ended) and MAX389 (4‑channel differential) are high‑voltage, fault‑protected analog multiplexers that use a series N‑channel/P‑channel structure to limit leakage to only a few nanoamperes when power is removed. All control inputs are TTL/CMOS compatible and the devices feature break‑before‑make switching.
The datasheet provides absolute maximum ratings, electrical characteristics, typical operating curves, pin configurations, ordering information, and detailed fault‑protection circuitry. It also includes application examples for data‑acquisition systems, industrial process control, and avionics test equipment.
| Maximum Input Over‑Voltage | ±100 V |
|---|---|
| Leakage Current (OFF) | few nanoamperes |
The MAX388 can tolerate an over‑voltage of up to ±100 V on its analog inputs, after which the channel turns off.
The MAX389 is a 4‑channel differential (2‑of‑8) analog multiplexer.