ATTINY1634-MFR

Overview

The ATtiny1634-MFR is an 8-bit AVR microcontroller featuring a 20-pad QFN/MLF package. It includes 16 KB of in-system programmable Flash, 1 KB of SRAM, and 256 bytes of EEPROM. The device supports a maximum clock frequency of 12 MHz at 4.5–5.5 V. It provides 18 programmable I/O lines, two USARTs, a slave TWI interface, a USI, and a 12-channel 10-bit ADC. Operating voltage ranges from 1.8 V to 5.5 V with an industrial temperature range of -40°C to +85°C.

Feature Summary

• Supports capacitive touch sensing via dedicated hardware and QTouch library integration
• Includes calibrated internal oscillators for 8MHz main clock and 32kHz ultra-low power operation
• Features on-chip debug system (debugWIRE) and in-system programming via SPI port

Applications

• Capacitive touch sensing interfaces
• Low-power embedded control systems
• General-purpose microcontroller applications requiring serial communication

Procurement Notes

Verify the specific speed grade suffix and temperature range code associated with the MFR designation against official Microchip ordering tables. Confirm that the MLF package variant matches the required footprint dimensions and thermal pad soldering specifications. Ensure compatibility with existing design tools and development kits supporting the ATtiny1634 architecture.

Selection Notes

Select this component when a balance of memory capacity and peripheral richness is needed within a compact 20-pin form factor. Consider the 12 MHz performance limit at higher supply voltages and the availability of multiple communication interfaces including dual USARTs and TWI. Evaluate power consumption requirements across different sleep modes if battery operation is intended.

Part Context

This part belongs to the tinyAVR family, utilizing the enhanced RISC architecture known for single-cycle instruction execution. The ATtiny1634 variant specifically targets applications requiring moderate program storage and analog input capabilities without the complexity of larger MCU families.

Replacement Considerations

ATtiny1634-MU

FAQ

What is the data retention capability of the non-volatile memory?

The Flash and EEPROM data retention is specified as 20 years at 85°C or 100 years at 25°C.

How many general purpose working registers does the CPU core contain?

The AVR core contains 32 general purpose working registers directly connected to the Arithmetic Logic Unit.