MAX7324 is a 2-wire serial interface peripheral with 16 I/O ports that are divided into eight push-pull outputs and eight inputs. Its applications include cell phones, notebooks, SAN/NAS, automotive servers, satellite radio, etc.
The MAX7324 is a 2‑wire serial‑interfaced port expander that provides 16 I/O ports, split into eight push‑pull outputs and eight inputs. Each input features selectable internal pull‑ups, over‑voltage protection to +6 V, and transition detection with an interrupt output. The device operates from a supply voltage of 1.71 V to 5.5 V and supports up to 400 kHz I²C communication.
The datasheet includes absolute maximum ratings, DC electrical characteristics, timing diagrams, pin descriptions, package dimensions, and address mapping. It also describes power‑up behavior, standby mode, and the address‑selection scheme that allows 16 possible I²C slave addresses.
| I2C Serial Clock Frequency | up to 400 kHz |
|---|---|
| Push‑Pull Output Sink Current | 20 mA per pin |
| Operating Temperature Range | -40 °C to +125 °C |
| Package Options | 24‑pin QSOP or 4 mm×4 mm TQFN |
Each push‑pull output can sink up to 20 mA.
Yes, the input ports are over‑voltage protected up to +6 V.