ATTINY1634R-SUR

Overview

The ATtiny1634R-SUR is an 8-bit AVR microcontroller in a 20-pin SOIC package. It features 16K bytes of self-programmable Flash, 1K byte SRAM, and 256 bytes EEPROM. The device operates at speeds up to 12MHz at 4.5-5.5V, or 8MHz at 2.7-5.5V, and 2MHz across the full 1.8-5.5V range. It includes two USARTs, a 10-bit ADC with 12 channels, timers, and QTouch support. Operating voltage is 1.8V to 5.5V, with an industrial temperature range of -40°C to +105°C.

Feature Summary

• Supports capacitive touch sensing via dedicated hardware and QTouch library integration
• Includes dual full-duplex USARTs with start frame detection capabilities
• Features on-chip debug system (debugWIRE) for programming and debugging
• Provides multiple low-power operating modes including Idle, Standby, and Power-down

Applications

• Capacitive touch sensing interfaces
• Industrial control systems requiring robust communication
• Battery-powered devices utilizing low-power consumption modes
• Applications needing secure data storage with programming lock

Procurement Notes

Verify that the ordering suffix 'R' corresponds to the specific ±2% internal oscillator accuracy required for your design, as distinct from the standard ±10% variant. Confirm the 'SUR' suffix indicates tape and reel packaging if automated assembly is planned. Ensure the component meets RoHS compliance standards for hazardous substances.

Selection Notes

Select this model when precise internal clock calibration is critical due to the ±2% accuracy option. It is suitable for designs requiring dual serial communication ports and analog-to-digital conversion. Consider the 18 programmable I/O lines and available timer resources against application complexity. Evaluate power consumption requirements across different voltage and speed grades.

Part Context

This component belongs to the Atmel tinyAVR family, specifically the ATtiny1634 series. It utilizes the high-performance, low-power AVR 8-bit RISC architecture. The device integrates non-volatile memory segments with high endurance and supports in-system programming via SPI.

Replacement Considerations

ATtiny1634-MU

FAQ

What is the accuracy of the internal calibrated oscillator for this specific part number?

The ATtiny1634R-SUR features a calibrated 8MHz oscillator with ±2% accuracy.

How does the device handle capacitive touch sensing?

It provides dedicated hardware support and compatibility with the QTouch Library for implementing touch-sensitive interfaces.