MAX7317 is a 10-port, SPI interface I/O expander with overvoltage and hot-plug protection, with features including high-speed, 26MHz, SPITM/QSPITM/MICROWIRETM compatible serial interface, 2.25V to 3.6V operating voltage, I/O port input overvoltage protection to 7V, 7V rated voltage open drain output, I/O port supports hot plug, 0.7µA (typical), 1.9µA (maximum) standby current, 3mm x 3mm, 0.8mm thick QFN package, -40°C to +125°C operating temperature range.
The MAX7317 is a 10‑bit general‑purpose I/O expander that communicates via a high‑speed SPI‑compatible serial interface. It provides ten configurable I/O pins (PO‑P9) that can be used as inputs or outputs and operate from a single supply voltage.
The device is offered in thin‑QFN (16‑pin) and QSOP (16‑pin) packages and supports operation from –40 °C to +125 °C. Detailed electrical, timing, and register specifications are provided for designers.
| Operating supply voltage (V+) | 2.25 V to 3.60 V |
|---|---|
| Operating temperature range | -40 °C to +125 °C |
| Maximum SCLK clock frequency | 26 MHz |
| Power‑on reset voltage (V_POR) | 2 V |
The MAX7317 provides ten I/O pins, labeled PO through P9.
It is offered in a 16‑pin Thin QFN package and a 16‑pin QSOP package.
The device can operate from –40 °C up to +125 °C.