The MAX7323 is an 8-channel I/O expander with four push-pull outputs and the other four are open-drain I/O ports. The device supports 400kHz I2C serial interface, operating voltage range is +1.71V~+5.5V, and operating temperature range is -40℃~+125℃.
The MAX7323 is a general‑purpose I2C port expander that provides eight I/O ports: four push‑pull outputs and four open‑drain I/Os. It operates from a 1.71 V to 5.5 V supply and supports up to 400 kHz serial‑clock frequency. The device includes over‑voltage protection to +6 V on the I/O ports and a latched interrupt output for input‑change detection.
Key features include 20 mA sink capability per output, selectable 16‑slave I²C addresses via ADO/AD2 pins, low standby current (≈0.6 µA), and automotive‑grade temperature range (‑40 °C to +125 °C). The part is offered in 16‑pin QSOP and 16‑pin TQFN packages.
| Operating Supply Voltage (V+) | 1.71 V to 5.5 V |
|---|---|
| Serial‑Clock Frequency | 400 kHz |
| Output Sink Current | 20 mA per port |
| Over‑voltage Protection | +6 V on I/O ports |
| Package Options | 16‑pin QSOP, 16‑pin TQFN |
The MAX7323 can be addressed with any of the 16 slave addresses from 0x60 to 0x6F.
The device provides eight I/O ports: four push‑pull outputs and four open‑drain I/Os.
Each output pin can sink up to 20 mA.