MAX7359BETG+T

Specialized Overview

The MAX7359BETG+T is a low-EMI key switch controller manufactured by Analog Devices Inc./Maxim Integrated. It provides I2C interfaced management for up to 64 key switches, generating unique codes for each press and release event. The device operates on a supply voltage ranging from +1.62V to +3.6V and supports metallic or resistive switches with resistance up to 5kΩ. It features static matrix monitoring to minimize electromagnetic interference. Key inputs are debounced and queued in a 16-byte FIFO. The component includes autosleep and autowake capabilities to reduce power consumption, drawing under 1µA in sleep mode. It is housed in a 24-pin TQFN package.

Specialized Feature Summary

• Static matrix monitoring ensures low-EMI operation suitable for sensitive portable electronics
• Autosleep and autowake functions minimize current consumption during idle periods
• Hardware interrupt output configurable at FIFO level or specific time intervals
• Up to seven open-drain logic outputs available for general-purpose use or LED driving

Specialized Applications

• Cell phones
• PDAs
• Handheld games
• Portable consumer electronics

Specialized Procurement Notes

Verify the suffix 'T' indicates tape-and-reel packaging when sourcing this specific part number. Confirm the manufacturer is Analog Devices Inc./Maxim Integrated. Ensure the component matches the 24-pin TQFN form factor. Check RoHS compliance status as indicated by the '+' designation. Validate the operating temperature range requirements against your application environment.

Specialized Selection Notes

Select this component when managing up to 64 keys with low electromagnetic interference requirements. It is suitable for battery-powered devices due to its ultra-low sleep current. Consider the 24-pin TQFN package size constraints. Ensure the host microcontroller supports the required I2C interface speed. Verify that the supply voltage range aligns with the system power rails.

Specialized Part Context

The MAX7359 series includes variants such as the MAX7359ETG+ and MAX7359EWA+. These parts share identical functional specifications but differ in package type. The ETG variant uses a 24-pin TQFN package, while the EWA variant utilizes a 25-bump WLP package. Both operate within the same -40°C to +85°C temperature range and support the same key scanning and I2C interface features.

Specialized Replacement Considerations

Public confirmed substitute part numbers include MAX7359ETG+ and MAX7359EWA+. These alternatives offer identical functionality with different packaging options. Verify pin compatibility and package dimensions before substitution. Ensure the replacement part meets the same electrical and environmental specifications.