深圳市勤思达科技有限公司

系统监控

Benefits and Features

● Industry-Standard 4-Wire Interface Simplifies

Expansion of I/O Ports to Up to 28 I/Os Independent

of Microprocessor Architecture

• High-Speed, 26MHz, SPI-/QSPI™-/MICROWIRE®-

Compatible Serial Interface

• 2.25V to 5.5V Operation

• 20 or 28 I/O Ports Configurable as Push-Pull Logic

Output, Schmitt Logic Input or Schmitt Logic Input

with Internal Pullup

• Logic Transition Detection for Seven I/O Ports

● Low Power Consumption Reduces Power-Supply

Requirements

• 11μA (max) Shutdown Current  

The MAX7301 compact, serial-interfaced I/O expander

(or general-purpose I/O (GPIO) 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 either as 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 MAX7301 is controlled through an SPI-compatible

4-wire serial interface