ATTINY84A-MU

Overview

The ATTINY84A-MU is an 8-bit AVR microcontroller featuring 8 KB 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 1.8 V to 5.5 V. The device includes 12 general-purpose I/O lines, an 8-channel 10-bit ADC with programmable gain, two timer/counters with PWM channels, and a Universal Serial Interface. It is housed in a 20-pad QFN/MLF package (20M1) and supports industrial temperature ranges.

Feature Summary

• High-performance 8-bit AVR architecture executing most instructions in a single clock cycle
• Non-volatile memory segments including self-programmable Flash and EEPROM with high endurance ratings
• Integrated analog peripherals including an 8-channel 10-bit ADC with differential inputs and programmable gain
• Multiple power-saving modes such as Idle, ADC Noise Reduction, Standby, and Power-down

Applications

• Battery-powered embedded systems requiring low active and standby current consumption
• Industrial control applications utilizing the Universal Serial Interface for communication
• Sensor interface circuits leveraging the on-chip analog comparator and programmable gain amplifier
• General-purpose logic control using pin change interrupts and internal calibrated oscillators

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and lead finish. Ensure the speed grade matches the intended operating voltage and temperature requirements. Confirm RoHS compliance status if required by the manufacturing process. Check for any recent product change notices regarding marking or packaging updates.

Selection Notes

Select this component when 8 KB of program memory and 12 I/O lines are sufficient for the application. Consider the 20-pin QFN package for space-constrained designs requiring surface-mount assembly. Evaluate the need for the 20 MHz performance level relative to the available supply voltage range. Verify that the industrial temperature range meets the environmental conditions of the target deployment.

Part Context

This part belongs to the ATtiny24A/44A/84A family of low-power CMOS 8-bit microcontrollers based on the AVR enhanced RISC architecture. The family shares core features including the instruction set, peripheral sets, and memory organization, differing primarily in Flash, EEPROM, and SRAM capacities. The ATTINY84A represents the highest memory configuration within this specific series.

Replacement Considerations

ATtiny84A-MMH

FAQ

What is the function of the bottom pad in the 20M1 package?

The bottom pad in the 20-pad QFN/MLF package must be soldered to ground to ensure proper thermal dissipation and electrical grounding.

How does the device handle reset conditions?

A low level on the RESET pin generates a reset if held longer than the minimum pulse length. This pin can also be used as a weak I/O pin if the RSTDISBL fuse is programmed.

What data retention capabilities does the non-volatile memory offer?

The Flash and EEPROM data retention is qualified for 20 years at 85°C or 100 years at 25°C based on reliability qualification results.