ATTINY84-20MU

Overview

The ATTINY84-20MU is an 8-bit AVR microcontroller featuring 8K bytes of in-system programmable Flash, 512 bytes of EEPROM, and 512 bytes of SRAM. It operates at a maximum clock frequency of 20 MHz with a supply voltage range of 2.7V to 5.5V. The device includes one 8-bit and one 16-bit Timer/Counter with PWM channels, an 8-channel 10-bit ADC, and an analog comparator. It utilizes a 20-pin QFN/MLF package and supports industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput efficiency.
• Non-volatile memory with high endurance ratings for both Flash and EEPROM data retention.
• Integrated peripheral set including multi-channel ADC with programmable gain and universal serial interface.
• Multiple software-selectable power-saving modes to optimize energy consumption during operation.

Applications

• In-system programming via SPI port
• Industrial temperature range monitoring (-40°C to +85°C)
• Low-power embedded control systems

Procurement Notes

Verify the specific ordering code against the manufacturer's official documentation to ensure correct speed grade and package configuration. Confirm that the matte tin finish indicated by the suffix aligns with your assembly requirements. Cross-reference the datasheet revision history to identify any known errata or functional limitations relevant to your design implementation.

Selection Notes

Select this component when 8K program memory and 12 general-purpose I/O lines are required within a compact 20-pin footprint. Ensure the operating voltage environment remains within the 2.7V to 5.5V specification for the 20MHz speed grade. Consider the available timer and ADC resources for signal processing needs before finalizing the part choice.

Part Context

This device belongs to the ATtiny24/44/84 family of low-power CMOS 8-bit microcontrollers based on the AVR enhanced RISC architecture. The family shares common core features but varies in memory sizes and pin counts. The ATTINY84 variant specifically provides the largest memory capacity within the standard 20-pin package options.

Replacement Considerations

ATtiny84-20SSU

FAQ

What is the function of the bottom pad in the 20-pad QFN/MLF package?

The bottom pad should be soldered to ground to ensure proper thermal dissipation and electrical grounding.

How does the device handle reset conditions if the clock is not running?

A low level on the RESET pin for longer than the minimum pulse length will generate a reset, even if the clock is not running, provided the reset pin has not been disabled via fuse settings.

What are the available sleep modes for power optimization?

The device offers four software-selectable power saving modes: Idle, ADC Noise Reduction, Standby, and Power-Down.