General Description

The MAX7320 2-wire serial-interfaced peripheral fea-

tures eight push-pull outputs with selectable power-up

logic states.

The +5.5V tolerant RST input clears the serial interface,

MAX7320.

The MAX7320 uses two address inputs with four-level

address also determines the power-up state level for

the outputs in groups of four ports.

The MAX7320 supports hot insertion. The serial inter-

face SDA, SCL, AD0, AD2, and RST remain high

impedance in power-down (V+ = 0V) with up to +6V

asserted on them.

The MAX7320 is one device in a family of pin-compatible

port expanders with a choice of input ports, open-drain

I/O ports, and push-pull output ports (see Table 1).

The MAX7320 is available in 16-pin QSOP and 16-pin

TQFN packages, and is specified over the automotive

temperature range (-40°C to +125°C).

Applications

Features

♦ +1.71V to +5.5V Operating Voltage

♦ Eight Push-Pull Output Ports with Selectable

Power-Up Logic States

♦ RST Clears the Serial Interface, Terminating Any

Serial Transaction to or from the MAX7320

♦ AD0 and AD2 Inputs Select from 16 Slave

Addresses

♦ Low 0.6µA (typ) Standby Current

♦ -40°C to +125°C Temperature Range

________________________________________________________________ Maxim Integrated Products

1

19-3879; Rev 0; 10/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

EVALUATION

KIT

AVAILABLE

Ordering Information

PART

TEMP

RANGE

PIN-

PACKAGE

TOP

MARK

PKG

CODE

MAX7320AEE+

-40°C to

+125°C

16 QSOP

—

E16-4

MAX7320ATE+

-40°C to

+125°C

16 TQFN

3mm x 3mm

x 0.8mm

ADB

T1633-4

Pin Configurations, Typical Application Circuit, and

Functional Diagram appear at end of data sheet.

+Denotes lead-free package.

Selector Guide

PART

INPUTS

INTERRUPT MASK

OPEN-DRAIN OUTPUTS

PUSH-PULL OUTPUTS

MAX7319

8

Yes

—

—

MAX7320

—

—

—

8

MAX7321

Up to 8

—

Up to 8

—

MAX7322

4

Yes

—

4

MAX7323

Up to 4

—

Up to 4

4

MAX7328*

—

—

MAX7329**

Up to 8

—

Up to 8

—

*Second source to PCF8574.

**Second source to PCF8574A.

Cell Phones/PDAs

Satellite Radios

Notebooks

Automotive

RAID

Servers