MAX7300ATL+

Overview

The MAX7300ATL+ is a compact, serial-interfaced I/O expansion peripheral providing 28 user-configurable ports (P4–P31). It operates on a 2.5V to 5.5V supply with a maximum shutdown current of 11µA. The device features an I²C-compatible 2-wire interface supporting up to 400kHz clock frequency and allows 16 unique addresses via two select pins. Each port functions as a push-pull output (sinking 10mA, sourcing 4.5mA) or a Schmitt-trigger input with optional internal pullup. Seven ports support configurable transition detection logic that triggers an interrupt upon state changes.

Feature Summary

• Configurable I/O Ports: Individual ports can be set as push-pull outputs or Schmitt-trigger inputs with selectable internal pullups.
• Transition Detection: Monitors seven specific ports for logic level changes and generates an interrupt signal when transitions occur.
• I²C Interface: Utilizes a standard 2-wire serial interface with four-level address selection to support multiple devices on the same bus.

Applications

• White Goods
• Industrial Controllers
• System Monitoring

Procurement Notes

Verify the component matches the exact part number MAX7300ATL+. Confirm the package type is 40-pin TQFN-EP and the temperature range is -40°C to +125°C. Ensure the suffix '+' indicates lead-free/RoHS compliance as specified in the ordering information.

Selection Notes

Select this model if 28 I/O ports are required within a 40-pin TQFN footprint. Compare against the MAX7300AAX for a 36-pin SSOP option or the MAX7300AAI/ATI for 20-port configurations. Consider the MAX7301 if SPI interfacing is preferred over I²C.

Part Context

The MAX7300 series serves as a general-purpose GPIO peripheral for microprocessors. The MAX7300ATL+ specifically denotes the 28-port variant housed in a 40-pin Thin Quad Flatpack No-lead (TQFN) package with an exposed pad for thermal management.

Replacement Considerations

The MAX7300AAX provides a pin-compatible alternative in a 36-pin SSOP package. For applications requiring fewer ports, the MAX7300AAI (28-pin SSOP) or MAX7300ATI (28-pin TQFN) offer 20-port solutions.