MAX7304_12 Datasheet, PDF(1/28 Page) Maxim Integrated Products – I2C-Interfaced 16-Port,Level-Translating GPIO and LED Driver

19-5949; Rev 1; 3/12

MAX7304

I2C-Interfaced 16-Port,

Level-Translating GPIO and LED Driver

with High Level of Integrated ESD Protection

General Description

Features

The MAX7304 consists of 16 port GPIOs, with 12 push-

pull GPIOs and four open-drain GPIOs configurable as

PWM-controlled LED drivers. The device supports a

1.62V to 3.6V separate power supply for level translation.

An address-select input (AD0) allows up to four unique

slave addresses for the device.

Each GPIO can be programmed to one of the two

externally applied logic voltage levels. PORT15âPORT12

can also be configured as LED drivers that feature

constant-current sinks and PWM intensity control with the

internal oscillator. The maximum constant-current level for

each open-drain LED port is 20mA. The intensity of the

LED on each open-drain port can be individually adjusted

through a 256-step PWM control. The port also features

LED fading.

The same index rows and columns in the device can be

used as a direct logic-level translator.

The device is offered in a 24-pin (3.5mm x 3.5mm) TQFN

package with an exposed pad, and a small 25-bump

(2.159mm x 2.159mm) wafer-level package (WLP) for

cell phones, pocket PCs, and other portable consumer

electronic applications.

The device operates over the -40NC to +85NC extended

temperature range.

Applications

Cell Phones

Notebooks

PDAs

Handheld Games

Portable Consumer Electronics

S Four LED Driver Pins on PORT15âPORT12

S Integrated High-ESD Protection

Â±8kV IEC 61000-4-2 Contact Discharge

Â±15kV IEC 61000-4-2 Air-Gap Discharge

S 5V Tolerant, Open-Drain I/O Ports Capable of

Constant-Current LED Drive

S 256-Step PWM Individual LED Intensity-Control

Accuracy

S Individual LED Blink Rates and Common LED

Fade-In /Out Rates from 256ms to 4096ms

S User-Configurable Debounce Time (1ms to 32ms)

S Configurable Edge-Triggered Port Interrupt (INT)

S 1.62V to 3.6V Operating Supply Voltage

S Individually Programmable GPIOs to Two Logic

Levels

S 8-Channel Individual Programmable Level

Translators

S Supports Hot Insertion

S 400kbps, 5.5V Tolerant I2C Serial Interface with

Selectable Bus Timeout

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part,

refer to www.maxim-ic.com/MAX7304.related.

Typical Operating Circuit

+1.8V +2.6V

VCC VLA

PORT0

PORT1

GPIO

+5V

INT MAX7304

MCU

SDA

SCL

PORT13

PORT14

AD0

GND PORT15

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maximâs website at www.maxim-ic.com.

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