ATTINY1634-SU

Overview

The ATtiny1634-SU is an 8-bit AVR microcontroller in a 20-pin SOIC package. It features 16 KB of in-system programmable Flash, 1 KB of SRAM, and 256 bytes of EEPROM. The device operates at speeds up to 12 MHz within the 4.5 V to 5.5 V supply range. It includes two USARTs, a 10-bit ADC with 12 external channels, and dedicated hardware support for capacitive touch sensing.

Feature Summary

• Supports capacitive touch sensing via dedicated hardware and QTouch library integration
• Features dual full-duplex USARTs with start frame detection capabilities
• Includes a calibrated 8MHz oscillator with temperature calibration options

Applications

• Capacitive touch interface implementations
• Multi-channel analog signal acquisition systems
• Dual serial communication gateway devices

Procurement Notes

Verify that the ordering code suffix 'SU' corresponds specifically to the 20-lead plastic gull wing small outline package (SOIC). Confirm the speed grade matches the required operating voltage and frequency specifications for your application environment.

Selection Notes

Select this component when dual independent serial interfaces are required alongside high-resolution analog input. The integrated touch sensing hardware reduces software overhead compared to standard GPIO-based solutions. Ensure the operating voltage remains above 4.5 V to achieve maximum clock frequencies.

Part Context

This part belongs to the tinyAVR family utilizing the enhanced RISC architecture. It provides high throughput approaching 1 MIPS per MHz while maintaining low power consumption across multiple sleep modes including idle, standby, and power-down configurations.

Replacement Considerations

ATtiny1634-MU: Identical core functionality housed in a 20-pad QFN/MLF package instead of SOIC.