MAX7347ATE+TG104

Specialized Overview

The MAX7347ATE+TG104 is a microprocessor peripheral providing I2C interfaced management for up to 24 key switches. It operates on a 2.4V to 3.6V supply with under 10µA shutdown current. The device features static matrix monitoring for low-EMI operation, an 8-deep FIFO for debounced key events, and user-configurable debounce times from 9ms to 40ms. It includes a tone generator capable of producing 14 programmable musical frequencies and supports hardware interrupts or general-purpose open-drain outputs.

Specialized Feature Summary

• Static key-switch monitoring ensures low electromagnetic interference during operation.
• Integrated piezo sounder controller generates automatic key-click sounds or alarm tones.
• Configurable interrupt output alerts the processor to key presses or FIFO levels.

Specialized Applications

• Medical Instruments
• Instrumentation Panels
• Security and Access Systems

Specialized Procurement Notes

Verify the package marking matches the TQFN-EP configuration and confirm the suffix indicates lead-free construction. Ensure the supplier provides traceability documentation consistent with Maxim Integrated manufacturing standards. Cross-reference the part number against official distributor catalogs to validate authenticity before purchase.

Specialized Selection Notes

Select this model when the application requires monitoring exactly 24 keys within a 16-pin footprint. Choose the TQFN variant for applications needing exposed paddle thermal dissipation. Verify that the required I2C address combinations are supported by the AD0 pin configuration relative to other bus devices.

Specialized Part Context

This component belongs to the MAX7347/MAX7348/MAX7349 family of 2-wire interfaced key switch controllers. The MAX7347 specifically handles up to 24 switches in a 16-pin package, whereas the MAX7348 and MAX7349 support 40 and 64 switches respectively. All variants share similar interface protocols and sounder capabilities.

Specialized Replacement Considerations

Direct functional substitutes include the MAX7348 and MAX7349 if additional key inputs are required, though pin counts differ. No identical 16-pin replacement exists within the same series; redesign may be necessary for alternative vendors.