General Description

The MAX7314 I2C-compatible serial interfaced peripheral provides microprocessors with 16 I/O ports plus one output-only port and one input-only port. Each I/O port can be individually configured as either an open-drain current-sinking output rated at 50mA and 5.5V, or a logic input with transition detection. The output-only port can be assigned as an interrupt output for transition detection. The outputs are capable of driving LEDs, or providing logic outputs with external resistive pullup up to 5.5V.

Features

♦ 400kbps, 2-Wire Serial Interface, 5.5V Tolerant

♦ 2V to 3.6V Operation

♦ Overall 8-Bit PWM LED Intensity Control

   Global 16-Step Intensity Control

   Individual 16-Step Intensity Controls

♦ 2-Phase LED Blinking

♦ 50mA Maximum Port Output Current

♦ Supports Hot Insertion

♦ Outputs are 5.5V-Rated Open Drain

♦ Inputs are Overvoltage Protected to 5.5V

♦ Transition Detection with Interrupt Output

♦ 1.2µA (typ), 3.6µA (max) Operating Current

♦ Small 4mm x 4mm, Thin QFN Package

♦ -40°C to +125°C Temperature Range

Applications

   LCD Backlights

   LED Status Indication

   Relay Drivers

   Keypad Backlights

   RGB LED Drivers

   System I/O Ports