MAX7300AGL-TG068

Overview

The MAX7300AGL-TG068 is a 20-port I/O expander from the MAX7300 series, manufactured by Analog Devices Inc. (Maxim Integrated). It interfaces via a 2-wire serial bus (I2C/SMBus) with a maximum clock frequency of 400 kHz. The device operates within a supply voltage range of 2.5 V to 5.5 V and supports an industrial temperature range from -40°C to +125°C. It features interrupt outputs for efficient status monitoring. The component is housed in a TQFN-40 package, suitable for surface-mount applications requiring high-density I/O expansion in space-constrained designs.

Feature Summary

• Provides 20 general-purpose digital input/output ports accessible through a standard two-wire serial interface.
• Includes dedicated interrupt output functionality to signal state changes without continuous polling.
• Operates reliably across a wide industrial temperature range and flexible voltage supply spectrum.

Applications

• Portable electronic devices requiring extended I/O capabilities in compact form factors
• Industrial control systems needing robust I/O expansion under harsh environmental conditions
• Consumer electronics utilizing low-power serial communication protocols

Procurement Notes

Verify the specific suffix TG068 against official Analog Devices documentation to confirm pinout and electrical characteristics, as suffixes often denote tape-and-reel packaging or specific manufacturing lot codes rather than functional differences. Ensure compatibility with your board's thermal management requirements given the TQFN-40 package. Cross-reference the manufacturer's latest datasheet for any updates on recommended operating conditions or end-of-life notices before finalizing procurement plans.

Selection Notes

Select this component when a design requires a high count of digital I/O lines controlled via a minimal number of microcontroller pins using I2C or SMBus protocols. It is appropriate for applications demanding operation at temperatures up to 125°C. Compare output drive currents and voltage levels against load requirements. Consider alternative packages like SSOP if board space allows for larger footprints but easier manual assembly.

Part Context

This part belongs to the MAX7300 family of I/O expanders, which are designed to add parallel I/O capability to serial buses. The MAX7300 series typically offers various port counts and package options to suit different integration needs. This specific model represents a high-port-count solution in a small outline package, fitting into Maxim's portfolio of interface and connectivity solutions for embedded systems.

Replacement Considerations

Direct replacements include other variants within the MAX7300 family such as MAX7300AAX+ or MAX7300AAI+, depending on the required package type (SSOP vs. TQFN). Verify that substitute parts maintain the same 20-port configuration and I2C compatibility. Check for any differences in interrupt polarity or register mapping between specific suffixes to ensure software compatibility.