The MAX7314 is a 16-bit I/O expander from TI that supports I2C bus interface. This device can be configured as output ports or input ports, output ports can drive LEDs, and input ports can detect logic levels. The MAX7314 has a built-in 8-bit PWM current control that can be used to control the current of all 17 output ports.
The MAX7314 is an I²C‑compatible 18‑port GPIO peripheral that provides 16 configurable I/O ports plus one output‑only port that can serve as an interrupt. Each port can be set as an open‑drain output (up to 50 mA) or a logic input with transition detection, and includes per‑port PWM LED intensity control and two‑phase blinking.
The device operates from a 2 V to 3.6 V supply, supports hot‑insertion, and is offered in a thin 4 mm × 4 mm QFN package. Typical applications include LCD backlights, LED status indicators, relay drivers, keypad backlights, and RGB LED drivers.
| Operating Supply Voltage (V+) | 2 V to 3.6 V |
|---|---|
| Maximum Port Output Current | 50 mA |
| Input Over‑voltage Protection | 5.5 V |
| Package | Thin QFN 4 mm × 4 mm |
Each I/O port can sink up to 50 mA.
The device can be configured for up to four I²C slave addresses using the AD0 pin.
Yes, all pins remain high‑impedance in power‑down, allowing hot insertion.