MAX7300ATI+

Overview

The MAX7300ATI+ is a serial-interfaced I/O expansion peripheral manufactured by Analog Devices Inc. under the Maxim Integrated brand. It provides 20 user-configurable ports in a 40-pin TQFN package. The device operates on a supply voltage range of 2.5V to 5.5V and supports an I2C-compatible interface with a maximum clock frequency of 400 kHz. Each port can be configured as a push-pull logic output capable of sinking 10 mA or sourcing 4.5 mA, or as a Schmitt trigger input with optional internal pullups. Seven ports feature configurable transition detection logic that generates an interrupt signal upon detecting a change in logic level.

Feature Summary

• Configurable I/O ports supporting push-pull outputs and Schmitt trigger inputs
• I2C-compatible two-wire serial interface allowing multiple address configurations
• Hardware interrupt generation based on logic level transitions for specific ports

Applications

• White goods control systems
• Industrial controller interfaces
• Automotive system monitoring

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and lead times prior to order placement. Ensure storage conditions meet moisture sensitivity requirements for surface-mount packages.

Selection Notes

Select this model when 20 I/O ports are required within a compact TQFN footprint. Verify compatibility with existing I2C bus addresses using the select pins. Consider the MAX7300AAX variant if 28 ports are needed in a different package style.

Part Context

This component belongs to the MAX7300 series of I/O expanders designed for microprocessor systems. It serves as a peripheral interface solution for expanding digital input and output capabilities without consuming additional processor pins.

Replacement Considerations

The MAX7300AAI+ offers identical functionality in a 28-pin SSOP package with 20 ports. For applications requiring 28 ports, the MAX7300AAX (36-pin SSOP) or MAX7300ATL (40-pin TQFN) are pin-compatible alternatives within the same family.