The MAX7318 is a 2-wire interfaced 16-bit parallel I/O port expander for SMBus and I2C applications.
The MAX7318 is a 2‑wire‑interfaced, 16‑bit I/O port expander that provides parallel input/output expansion for SMBus and I²C applications. It features configurable input/output pins, polarity inversion, interrupt output, hot‑insertion protection, and up to 64 selectable slave addresses.
The device is offered in 24‑pin SO, SSOP, TSSOP, and thin QFN packages and operates from 2.0 V to 5.5 V over an automotive temperature range of –40 °C to +125 °C. Electrical characteristics include a 400 kHz SCL clock limit, low standby current (5.4 pA typ), and open‑drain interrupt output.
| Supply Voltage (V+) | 2.0 V – 5.5 V |
|---|---|
| Operating Temperature Range | -40 °C to +125 °C |
| Number of I/O Pins | 16 |
| Interrupt Output Type | Open‑Drain |
| Standby Current | 5.4 pA typ |
| Maximum SCL Clock Frequency | 400 kHz |
| Slave ID Addresses | 64 |
| Package Options | 24‑pin SO, SSOP, TSSOP, Thin QFN |
The device operates from 2.0 V to 5.5 V.
It provides 16 I/O pins that default to inputs on power‑up.
Up to 64 slave ID addresses can be configured.
The maximum SCL clock frequency is 400 kHz.