Microchip ATTINY804-SSNR: A Comprehensive Technical Overview

The Microchip ATTINY804-SSNR represents a powerful and versatile entry in the growing family of 8-bit AVR microcontrollers. Designed for space-constrained and power-sensitive applications, this device packs a considerable feature set into a minimal footprint, making it an ideal choice for consumer, industrial, and IoT applications.

At the core of the ATTINY804 lies the high-performance AVR® CPU running at up to 20 MHz, offering a robust computational foundation. It is built on the modern AVRxt architecture, which enhances code density and execution efficiency, allowing for more complex tasks to be executed with fewer clock cycles.

A standout feature of this microcontroller is its impressive memory configuration. It is equipped with 8 KB of Flash program memory, 512 Bytes of SRAM, and 128 Bytes of EEPROM. This balanced memory allocation supports a wide range of firmware applications, from simple control logic to more sophisticated data handling routines.

The ATTINY804-SSNR excels in its peripheral integration, significantly reducing the need for external components. It features a 12-channel, 10-bit ADC (Analog-to-Digital Converter), enabling precise analog sensor readings. For control applications, it includes two 16-bit Timer/Counters (TCA and TCB) and one 8-bit Timer/Counter (TCB), providing flexible waveform generation and timing capabilities. Communication is facilitated by a full suite of serial interfaces: I2C, SPI, and a Universal Synchronous and Asynchronous Receiver and Transmitter (USART). The inclusion of a Event System allows for peripheral-to-peripheral communication without CPU intervention, drastically reducing power consumption in interrupt-driven designs.

Power efficiency is a critical design parameter. The device operates within a voltage range of 1.8V to 5.5V, supporting direct battery operation. It features multiple sleep modes, including Power-Down, which reduces current consumption to just 20 nA, making it exceptionally suited for battery-powered and energy-harvesting applications.

Housed in a compact SOIC-14 package, the ‘SSNR’ suffix denotes the tape-and-reel packaging for high-volume automated manufacturing. The integrated CRC/SCAN and Window Watchdog Timer (WWDT) enhance system reliability and safety, which are paramount in critical applications.

ICGOOODFIND: The Microchip ATTINY804-SSNR is a highly integrated, power-efficient 8-bit MCU that successfully balances performance, cost, and size. Its rich set of analog and digital peripherals, combined with its ultra-low-power capabilities, makes it an outstanding solution for designing intelligent, connected, and efficient embedded systems.

Keywords: 8-bit AVR Microcontroller, Ultra-Low-Power, Peripheral Integration, 10-bit ADC, AVRxt Architecture.