MAX7300ANI

Overview

The MAX7300ANI is a compact, serial-interfaced I/O expansion peripheral manufactured by Analog Devices Inc./Maxim Integrated. It provides microprocessors with up to 28 ports, each individually configurable as a logic input or output. The device operates within a voltage range of 2.5V to 5.5V and supports an I2C-compatible 2-wire serial interface with a maximum clock frequency of 400 kHz. It features push-pull outputs capable of sinking 10mA and sourcing 4.5mA, along with Schmitt trigger inputs. The component functions across a temperature range of -40°C to +125°C and utilizes a 28-pin SSOP package.

Feature Summary

• Configurable transition detection logic for seven I/O ports generates interrupts upon logic level changes
• Four-level logic addressing allows sixteen unique I2C addresses using only two select pins
• Optional internal pullup resistors available for Schmitt trigger logic inputs

Applications

• White Goods
• Industrial Controllers
• Automotive System Monitoring

Procurement Notes

Verify the specific suffix 'ANI' against official manufacturer documentation, as standard listings typically utilize suffixes such as 'AAI' or 'ATL'. Confirm package type and port count match project requirements. Check RoHS compliance status and lead times through authorized distributors. Ensure the ordering suffix does not alter functional specifications unless explicitly stated in the datasheet.

Selection Notes

Select this component when a microprocessor requires expanded I/O capabilities via a standard I2C bus. Verify that the required number of ports fits within the 20 or 28-port configuration limits. Ensure the system voltage falls between 2.5V and 5.5V. Consider the interrupt capability if real-time state monitoring of specific ports is necessary for the application design.

Part Context

The MAX7300 belongs to a family of serial I/O expanders designed to reduce pin counts on host processors. Variants like the MAX7301 offer SPI interfaces, while others provide LED drive capabilities. This specific series focuses on general-purpose digital I/O expansion with flexible logic configuration options for embedded systems.

Replacement Considerations

The MAX7301 serves as a pin-compatible alternative with an SPI interface instead of I2C. For applications requiring higher current drive, the MAX6956 offers constant-current LED drive capabilities. Verify pinout compatibility and software register mapping before substituting these components.