ATTINY1634R-SU

Overview

The ATtiny1634R-SU is an 8-bit AVR microcontroller in a 20-lead SOIC package. It features 16 KB of self-programmable Flash, 1 KB SRAM, and 256 bytes 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, hardware QTouch support, and debugWIRE capabilities.

Feature Summary

• Supports capacitive touch sensing via dedicated hardware and QTouch library integration
• Provides dual full-duplex USARTs equipped with start frame detection
• Includes calibrated internal oscillators for both high-speed and ultra-low-power applications
• Features on-chip debug system accessible through the SPI programming port

Applications

• Capacitive touch interface implementations
• Serial communication systems requiring multiple data links
• Battery-powered devices utilizing low-power sleep modes
• Industrial control units operating in extended temperature environments

Procurement Notes

Verify that the ordering suffix 'SU' corresponds to the 20-lead Small Outline Integrated Circuit package. Confirm the 'R' designation indicates the specific ±2% accuracy grade for the internal oscillator calibration. Ensure the required speed grade aligns with the intended operating voltage and temperature conditions specified in the datasheet.

Selection Notes

Select this component when design requirements include precise timing due to the calibrated oscillator accuracy. Consider its suitability for applications needing robust serial connectivity alongside analog signal acquisition. Evaluate power consumption profiles against available sleep modes if battery life is a critical constraint.

Part Context

This part belongs to the ATtiny1634 family within the tinyAVR series. It shares architectural similarities with other members but is distinguished by its specific memory configuration and package type. The R suffix denotes a tighter tolerance for the internal clock source compared to standard variants.

Replacement Considerations

ATtiny1634-SU serves as the standard variant with ±10% oscillator accuracy. ATtiny1634-MU offers equivalent functionality in a QFN/MLF package format.