ATTINY841-MMHR

Overview

The ATTINY841-MMHR is an 8-bit AVR microcontroller featuring 8KB of in-system programmable Flash, 512 bytes of EEPROM, and 512 bytes of SRAM. It operates at speeds up to 16 MHz with a supply voltage range of 1.7V to 5.5V. The device includes a 10-bit ADC with 12 external and 5 internal channels, two USARTs, SPI, and TWI interfaces. It utilizes a 20-pad VQFN package (3x3mm) and supports industrial temperatures from -40°C to +85°C.

Feature Summary

• Advanced RISC architecture delivering up to 1 MIPS throughput per MHz
• Integrated analog subsystem with 10-bit ADC and dual comparators
• Multiple communication peripherals including dual USARTs and SPI
• Four software-selectable low-power sleep modes

Applications

• Battery-powered sensor nodes
• Industrial control systems
• Consumer electronics
• Smart home devices

Procurement Notes

Verify the MMHR suffix indicates tape-and-reel packaging rather than tray. Confirm the specific speed grade matches the required operating frequency for your target voltage. Ensure the industrial temperature rating aligns with environmental conditions. Cross-reference the datasheet revision to confirm pinout compatibility.

Selection Notes

Select this model when 8KB program memory is required over the 4KB variant. Choose the VQFN package for compact board space requirements. Verify that the 12 I/O lines meet interface needs. Consider power consumption profiles if battery operation is critical compared to higher-speed MCUs.

Part Context

This component belongs to the ATtiny441/841 family of 8-bit AVR microcontrollers. It shares architectural similarities with the ATtiny84A but offers enhanced analog features and updated peripheral sets. The MMHR suffix specifically denotes the reel packaging format for automated assembly processes.

Replacement Considerations

ATtiny841-MMH serves as the tray-packaged equivalent. ATtiny841-MU provides the same functionality in a QFN/MLF package.