ATTINY841-MU

Overview

The ATTINY841-MU is an 8-bit AVR microcontroller featuring 8K bytes of in-system programmable Flash, 512 bytes of EEPROM, and 512 bytes of SRAM. It utilizes a fully static architecture with up to 16 MIPS throughput at 16 MHz. The device includes one 8-bit and two 16-bit Timer/Counters, a 10-bit ADC with differential channels, dual USARTs, SPI, and I2C interfaces. Operating voltage ranges from 1.7V to 5.5V across speed grades. It is housed in a 20-pad MLF/QFN package.

Feature Summary

• Advanced RISC core executing most instructions in a single clock cycle
• Non-volatile memory with high endurance for Flash and EEPROM
• Integrated analog subsystem with differential ADC and comparators
• Multiple communication interfaces including dual USART and SPI

Applications

• Low power embedded control systems
• Sensor interface nodes requiring ADC conversion
• Serial communication gateways using dual USART
• Battery operated devices utilizing low power modes

Procurement Notes

Verify the specific speed grade suffix matches the required operating frequency for the target supply voltage. Confirm the MLF/QFN package dimensions align with PCB footprint requirements. Check RoHS compliance documentation if environmental regulations apply. Ensure ESD handling procedures are followed during assembly due to moisture sensitivity classification.

Selection Notes

Select this component when 8KB program memory and dual serial interfaces are necessary within a compact 20-pin form factor. Consider the 16MHz maximum frequency against the available supply voltage range to ensure timing requirements are met. Evaluate the integrated analog features if signal conditioning or measurement is required without external components.

Part Context

This part belongs to the ATtiny441/841 family of 8-bit AVR microcontrollers. It shares architectural similarities with other members like the ATtiny84A but offers enhanced analog capabilities such as differential ADC inputs and additional timer channels. The MLF/QFN package provides a small footprint suitable for space-constrained designs compared to larger DIP or SOIC variants.

Replacement Considerations

ATtiny841-MMH is a verified alternative in the VQFN package.