MAX7300AGL-T

Overview

The MAX7300AGL-T 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-compatible 2-wire serial interface with a maximum clock frequency of 400 kHz. It features logic transition detection for seven ports and includes an interrupt output capability. The component is housed in a 40-pin TQFN package and is rated for operation across a temperature range of -40°C to +125°C.

Feature Summary

• Configurable push-pull outputs and Schmitt trigger inputs with optional internal pullups
• Logic transition detection on seven specific I/O ports generating interrupt signals
• Four-level logic addressing allowing multiple devices on a single bus via two select pins

Applications

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

Procurement Notes

Verify the exact suffix 'GL' against official manufacturer documentation, as standard listings typically reference 'ATL' or 'AAI'. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may be restricted. Ensure the ordering part number matches the specific pin count and package variant required for the design.

Selection Notes

Select this component when a microprocessor requires expanded I/O capabilities via a standard I2C interface. It is suitable for designs needing configurable input/output states and interrupt-driven state changes. Consider the MAX7301 if SPI interfacing is preferred over I2C, or the MAX6956 if constant-current LED drive capabilities are necessary alongside I/O expansion.

Part Context

The MAX7300 series belongs to Maxim Integrated's family of compact serial I/O expanders. This specific model extends the functionality of earlier generations by offering flexible port configuration and low-power shutdown modes. It serves as a bridge between high-speed processors and slower peripheral devices, reducing pin count requirements on the main controller.

Replacement Considerations

The MAX7301AAI+T offers similar I/O expansion but utilizes an SPI interface instead of I2C. For applications requiring LED driving capabilities, the MAX6956 is a pin-compatible alternative with additional constant-current drivers. Verify pinout compatibility before substituting any cross-model components.