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MAX7300：2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander

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 MAX7300ATL have 28 ports and are available in 36-pin SSOP and 40-pin thin QFN packages, respectively. The MAX7300AAI and MAX7300ATI have 20 ports and are available in 28-pin SSOP and thin QFN packages. For an SPI™-interfaced version, refer to the MAX7301 data sheet. For a pin-compatible port expander with additional 24mA constant-current LED drive capability, refer to the MAX6956 data sheet.

Key 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

MAX7300: Typical Operating Circuit Applications/Uses Industrial Controllers System Monitoring White Goods

DataSheet

Parametrics

Quality and Environmental Data

• MAX7300.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
• MAX6956：2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander
• MAX7301：4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port 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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