The MAX7302 is a I2C-/SMBus™-compatible, serial-interfaced peripheral from Maxim, featuring 9 level-translating I/Os, operating from a 1.62V to 3.6V power supply.
The MAX7302 is a serial‑interfaced 9‑port GPIO and LED driver that operates from a 1.62 V to 3.6 V supply and supports level‑translation up to 5.5 V on its ports. Each port can be configured as an input, push‑pull output, open‑drain output, or as part of a configurable logic array (CLA), and provides 33‑step PWM intensity control and programmable LED blink periods.
The device includes an internal oscillator for PWM, blink, and key‑debounce functions, and can be cascaded with multiple MAX7302s. It is offered in 16‑pin QSOP and 16‑pin TQFN packages and is rated for operation from –40 °C to +125 °C. Detailed electrical characteristics, timing specifications, and register maps are provided for system integration.
| Operating Supply Voltage (Vob) | 1.62 V – 3.6 V |
|---|---|
| Port Logic Supply Voltage (VLA) | 1.62 V – 5.5 V |
| Maximum Output Sink Current per Port | 25 mA |
| Maximum Output Source Current per Port (push‑pull) | 10 mA |
| Standby Current (interface idle) | typical 0.06 µA |
| PWM Resolution | 33 steps |
| Temperature Range | -40 °C to +125 °C |
The device operates from 1.62 V to 3.6 V on its main supply and up to 5.5 V on the port logic supply.
Each output can sink up to 25 mA.
The PWM controller provides 33 discrete steps for output intensity.
Yes, the internal oscillator can be used to cascade multiple MAX7302 devices.