General Description

The MAX7316 I2C/SMBus™-compatible serial interfaced peripheral provides microprocessors with eight additional 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 to 50mA at 5.5V or as a logic input with transition detection. The output-only port can also be assigned as an interrupt output for transition detection. The outputs are capable of driving LEDs, or can provide 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

   Plus Individual 16-Step Intensity Controls

♦ 2-Phase LED Blinking

♦ High Output Current (50mA max per Port)

♦ Supports Hot Insertion

♦ Outputs are 5.5V-Rated Open Drain

♦ Inputs are Overvoltage Protected to 5.5V

♦ Transition Detection with Interrupt Output

♦ RST Input Clears Serial Interface and Restores

   Power-Up Default State

♦ Low Standby Current (1.2µA (typ), 3.3µA (max))

♦ Small 3mm x 3mm, 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