ATTINY1634-UUR

Overview

The ATtiny1634-UUR 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 operates within a voltage range of 1.8 to 5.5 V and covers an extended temperature range from -40°C to +105°C.

Feature Summary

• Supports capacitive touch sensing via dedicated hardware and the QTouch Library
• Includes two full-duplex USARTs with start frame detection capabilities
• Features a 10-bit analog-to-digital converter with multiple input channels
• Provides on-chip debugWIRE interface for programming and debugging

Applications

• Capacitive touch sensing interfaces
• Industrial control systems requiring extended temperature operation
• Battery-powered devices utilizing low-power sleep modes
• Communication modules using dual USART peripherals

Procurement Notes

Verify that the ordering suffix 'UUR' corresponds to the specified 20-pad MLF package and tape & reel delivery format. Confirm the speed grade matches the required operational frequency for the target supply voltage. Ensure the component meets the extended industrial temperature range specifications if operating in harsh environments.

Selection Notes

Select this model when a compact 20-pin surface-mount package is required alongside high non-volatile memory capacity. It is suitable for applications needing dual serial communication ports and integrated touch sensing support. Consider the specific oscillator accuracy requirements, as the standard version offers ±10% calibration tolerance.

Part Context

This component belongs to the tinyAVR family, designed for high-performance, low-power embedded applications. It utilizes an advanced RISC architecture allowing most instructions to execute in a single clock cycle. The device integrates various peripheral interfaces and power-saving modes to optimize system efficiency.

Replacement Considerations

ATtiny1634-MU: Identical electrical specifications but supplied in a tube instead of tape and reel.

FAQ

What is the impact of disabling the ULP oscillator on port pins?

Port pin PB3 is not guaranteed to function as a reliable input when the Ultra Low Power oscillator is disabled. Activating the watchdog timer automatically enables the ULP oscillator to resolve this issue.

Can Flash or EEPROM be written at low supply voltages?

Write operations to Flash and EEPROM may fail if the supply voltage drops below 2.4V. Programming should only occur when the voltage is maintained above this threshold.