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MAX7301：4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander

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. The MAX7301AAX and MAX7301ATL have 28 ports and are available in 36-pin SSOP and 40-pin TQFN packages, respectively. The MAX7301AAI has 20 ports and is available in a 28-pin SSOP package. For a 2-wire I²C-interfaced version, refer to the MAX7300 data sheet. For a pin-compatible port expander with additional 24mA constant-current LED drive capability, refer to the MAX6957 data sheet.

Key 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

MAX7301: Functional Diagram Applications/Uses Gaming Machines Industrial Controllers System Monitoring White Goods

DataSheet

Parametrics

Quality and Environmental Data

• MAX7301.pdf

Related Products

• MAX7318：2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection
• MAX7317：10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection
• MAX6964：17-Output LED Driver/GPO with Intensity Control and Hot-Insertion Protection
• MAX7314：18-Port GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection
• MAX7316：10-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
• MAX7315：8-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
• MAX7313：16-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
• MAX7312：2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection
• MAX6965：9-Output LED Driver with Intensity Control and Hot-Insertion Protection
• MAX7311：2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection
• MAX7310：2-Wire-Interfaced 8-Bit I/O Port Expander with Reset
• MAX7300：2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander
• MAX6956：2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander
• MAX6957：4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander
• MAX1608：Octal, SMBus-to-Parallel I/O Expanders
• MAX1609：Octal, SMBus-to-Parallel I/O Expanders

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