The MAX7312 is a 16-bit parallel input/output (I/O) port expander. It supports 400kbps I2C-compatible serial interface, operates from 2V to 5.5V. Max input voltage is 5V, supports hot insertion. 16 I/O pins are default to inputs.
The MAX7312 is a 2‑wire‑interfaced 16‑bit I/O port expander that provides up to 16 I/O pins, interrupt output, bus timeout, and hot‑insertion protection. It is designed for SMBus™ and I²C‑compatible applications and supports 64 selectable slave addresses.
Key features include a supply voltage range of 2 V to 5.5 V, operation from –40 °C to +125 °C, low standby current (2.9 µA typ), and availability in 24‑pin SO, SSOP, TSSOP and thin QFN packages. The datasheet provides detailed electrical characteristics, timing diagrams, pin descriptions, and register maps for system designers.
| Operating Temperature Range | -40 °C to +125 °C |
|---|---|
| Package Types | 24‑pin SO, SSOP, TSSOP, 4 mm×4 mm Thin QFN |
| Standby Current | 2.9 µA typ |
| Bus Timeout Feature | Lock‑up‑free operation |
| Interrupt Output Type | Open‑Drain |
| Number of I/O Pins | 16 |
| Slave ID Addresses | 64 selectable |
It provides 16 I/O pins.
It can operate from –40 °C to +125 °C.
The device supports 64 user‑selectable slave ID addresses.