MAX7300AAI+

Overview

The MAX7300AAI+ is a serial-interfaced I/O expansion peripheral providing 20 ports in a 28-pin SSOP package. It operates on a 2.5V to 5.5V supply with a maximum shutdown current of 11µA and supports a 400kHz I2C-compatible interface. Each port functions as a push-pull output (sinking 10mA, sourcing 4.5mA) or a Schmitt logic input with an optional internal pullup. Seven ports feature configurable transition detection logic that triggers an interrupt upon logic level changes.

Feature Summary

• Configurable I/O ports supporting push-pull outputs and Schmitt-trigger inputs with selectable internal pullups
• Transition detection logic for seven specific ports generating interrupts on state changes
• Four-level address logic enabling up to 16 devices on a single two-wire serial bus

Applications

• White Goods
• Industrial Controllers
• System Monitoring

Procurement Notes

Verify the component against official manufacturer documentation to confirm pinout compatibility and electrical specifications. Ensure the ordering suffix matches the required lead-free/RoHS-compliant status. Cross-reference the datasheet revision to validate timing characteristics and absolute maximum ratings before finalizing procurement.

Selection Notes

Select this device when a microprocessor requires expanded general-purpose I/O via an I2C-compatible interface. The MAX7300AAI+ provides 20 ports in a compact 28-pin SSOP package. Consider the MAX7300AAX if 28 ports are necessary, or the MAX7301 if SPI interfacing is preferred over the standard two-wire serial protocol.

Part Context

The MAX7300 series includes variants such as the MAX7300AAX (36-pin SSOP), MAX7300ATI (28-pin TQFN-EP), and MAX7300ATL (40-pin TQFN-EP). These alternatives offer different port counts and package footprints while maintaining identical core functionality and electrical characteristics within the same temperature range.

Replacement Considerations

The MAX7300AAX serves as a direct functional substitute offering 28 ports instead of 20, though it utilizes a 36-pin SSOP package rather than the 28-pin configuration.