General Description

The MAX6965 I2C-compatible serial interfaced peripheral provides microprocessors with nine additional output ports. Each output is an open-drain current-sinking output rated to 50mA at 7V. All outputs are capable of driving LEDs, or providing logic outputs with external resistive pullup up to 7V.

Eight-bit PWM current control is also integrated. Four of the bits are global control and apply to all LED outputs to provide coarse adjustment of current from fully off to fully on with 14 intensity steps. Additionally each output then has an individual 4-bit control, which further divides the globally set current into 16 more steps. Alternatively, the current control can be configured as a single 8-bit control that sets all outputs at once.

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

♦ Two-Phase LED Blinking

♦ High Port Output Current—Each Port 50mA (max)

♦ RST Input Clears Serial Interface and Restores

   Power-Up Default State

♦ Supports Hot Insertion

♦ Outputs are 7V-Rated Open Drain

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

♦ Tiny 3mm x 3mm, Thin QFN Package

♦ -40°C to +125°C Temperature Range

Applications

   LCD Backlights

   LED Status Indication

   Keypad Backlights

   RGB LED Drivers