ATTINY84A-SSU

Overview

The ATTINY84A-SSU is an 8-bit AVR microcontroller featuring 8KB of in-system programmable Flash, 512 bytes of EEPROM, and 512 bytes of SRAM. It operates within a voltage range of 1.8V to 5.5V and supports clock speeds up to 20MHz at the upper voltage limit. The device includes a 10-bit ADC with eight single-ended channels and twelve differential pairs, a 16-bit timer/counter, and an analog comparator. It utilizes a 14-lead SOIC package and functions across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Executes powerful RISC instructions in a single clock cycle for efficient processing.
• Provides non-volatile memory segments with high endurance for program and data storage.
• Integrates peripheral features including timers, counters, PWM channels, and a universal serial interface.
• Supports low power consumption through multiple software-selectable sleep modes.

Applications

• In-system programming via SPI port
• Touch sensing interfaces using QTouch Library
• Industrial control systems requiring wide temperature operation

Procurement Notes

Verify the specific speed grade suffix matches the required operating frequency for the target supply voltage. Confirm the package type corresponds to the design footprint. Ensure the industrial temperature rating aligns with environmental constraints. Check for any recent product change notices regarding marking or packaging updates before finalizing orders.

Selection Notes

Select this component when 8KB of Flash memory is sufficient for application code. Choose the SSU package for surface mount assembly on standard PCB layouts. Consider the 20MHz performance limit relative to the lowest expected supply voltage. Evaluate the 12 general-purpose I/O lines against pin count requirements.

Part Context

This device 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 functionality but differs in memory capacities. The ATtiny84A variant specifically provides the largest memory configuration within this series, offering 8KB Flash and 512 bytes each for EEPROM and SRAM.

Replacement Considerations

ATtiny84A-SSUR (Tape & Reel)

FAQ

What is the maximum operating speed at 1.8V?

The maximum operating speed at 1.8V is 4 MHz.

Does the device support external interrupts?

Yes, it supports internal and external interrupt sources, including pin change interrupts on all 12 I/O pins.

How many differential ADC channel pairs are available?

There are 12 differential ADC channel pairs with programmable gain options of 1x or 20x.