General Description

The MAX7370 I2C-interfaced peripheral provides microprocessors with management of up to 64 key switches,

with optional GPIO and PWM-controlled LED drivers.

Features

MonitorUp to 64 Keys

Integrated High-ESD Protection

    ±8kV IEC 61000-4-2 Contact Discharge

    ±14kV IEC 61000-4-2 Air-Gap Discharge

Keyscan UseStatic Matrix Monitoring for Low-EMI Operation

Four LED Driver Pinon COL7?COL4

5V Tolerant, Open-Drain I/O PortCapable of Constant-Current LED Drive

256-Step PWM Individual LED Intensity-Control Accuracy

Individual LED Blink Rateand Common LED

    Fade In/Out Ratefrom 256mto 4096ms

FIFO QueueUp to 16 Debounced Key Events

User-Configurable Keypresand Release

    Debounce Time (2mto 32ms)

Key-Switch Interrupt (INT) on Each Debounced

    Event/FIFO Level, or End-of-Definable Time Period

1.62V to 3.6V Operating Supply Voltage

Individually Programmable GPIOto Two Logic Levels

8-Channel Individual Programmable Level Translators

ProvideOptional GPIOon all ROW_ and COL_ Pins

SupportHot Insertion

400kbps, 5.5V Tolerant I2C Serial Interface with Selectable Bus Timeout

Applications

Cell Phones

Notebooks

PDAs

Handheld Games

Portable Consumer Electronics