2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander

 

 

General Description

The MAX7300 compact, serial-interfaced, I/O expansion peripheral provides microprocessors with up to 28

ports. Each port is individually user configurable to

either a logic input or logic output.

Each port can be configured as either a push-pull logic

output capable of sinking 10mA and sourcing 4.5mA, or a

Schmitt logic input with optional internal pullup. Seven

ports feature configurable transition detection logic, which

generates an interrupt upon change of port logic level.

The MAX7300 is controlled through an I2C™-compatible

2-wire serial interface, and uses four-level logic to allow

16 I2C addresses from only two select pins.

The MAX7300AAX and MAX7300AGL have 28 ports

and are available in 36-pin SSOP and 40-pin QFN packages, respectively. The MAX7300AAI and MAX7300ANI

have 20 ports and are available in 28-pin SSOP and 28-

pin DIP packages, respectively.

 

 

 

Applications

White Goods Industrial Controllers

Automotive System Monitoring

 

 

Features

 400kbps I2C-Compatible Serial Interface

 2.5V to 5.5V Operation

 -40°C to +125°C Temperature Range

 20 or 28 I/O Ports, Each Configurable as

Push-Pull Logic Output

Schmitt Logic Input

Schmitt Logic Input with Internal Pullup

 11µA (max) Shutdown Current 

 Logic Transition Detection for Seven I/O Ports

 

 

 

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