MAX7300AGL

Overview

The MAX7300AGL is a serial-interfaced I/O expansion peripheral manufactured by Analog Devices Inc. (Maxim Integrated). It provides up to 28 user-configurable ports, each individually selectable as a logic input or output. The device operates within a supply voltage range of 2.5V to 5.5V and supports an I²C interface with a maximum clock frequency of 400 kHz. Each port can be configured as a push-pull output capable of sinking 10mA and sourcing 4.5mA, or as a Schmitt trigger input with optional internal pullups. Seven ports feature configurable transition detection logic that generates an interrupt upon a change in the port's logic level. The component is housed in a 28-pin SSOP package and is rated for operation between -40°C and +125°C.

Feature Summary

• Provides up to 28 individually configurable I/O ports via a compact serial interface.
• Features seven ports with configurable transition detection logic for generating interrupts on logic level changes.
• Supports flexible port configuration including push-pull outputs and Schmitt trigger inputs with optional internal pullups.

Applications

• Microprocessor systems requiring expanded general-purpose I/O capabilities.
• Embedded control applications utilizing I²C communication protocols.
• Industrial environments necessitating wide operating temperature ranges.

Procurement Notes

Verify the specific suffix 'GL' against official manufacturer documentation to confirm package type and commercial availability status. Ensure compatibility with existing system power supplies and I²C bus configurations before procurement. Check for lead times and obsolescence notices directly from authorized distributors.

Selection Notes

Select this component when a microcontroller requires additional digital I/O lines beyond its native capacity. Verify that the required number of ports does not exceed the available 28-port limit. Confirm that the system voltage falls within the 2.5V to 5.5V operational range and that the I²C bus speed requirements are met by the 400 kHz maximum clock frequency.

Part Context

The MAX7300 series belongs to Maxim Integrated's family of serial I/O expanders designed to reduce pin count on host processors. This specific model offers a balance of port density and configurability, suitable for space-constrained designs. It serves as a bridge between low-pin-count microcontrollers and external peripherals requiring multiple digital signals.

Replacement Considerations

Consult official cross-reference lists for direct replacements. Verify that any substitute part maintains identical pinout, voltage specifications, and I²C protocol compatibility to ensure seamless integration without hardware redesign.