Microchip ATTINY402-SSFR: A Comprehensive Datasheet and Application Guide

The Microchip ATTINY402-SSFR represents a powerful and versatile entry in the growing family of modern 8-bit AVR microcontrollers. Designed for space-constrained and cost-sensitive applications, this device packs a surprising amount of performance and peripheral integration into a minimal footprint. This guide delves into the core specifications, key features, and practical application considerations for this potent MCU.

Core Architecture and Specifications

At its heart, the ATTINY402 is built on the low-power AVR processor core, capable of running at up to 20 MHz. It features 4 KB of Flash memory for program storage, 256 bytes of SRAM for data handling, and 128 bytes of EEPROM for non-volatile parameter storage. This memory configuration makes it ideal for managing dedicated tasks in embedded control systems, sensor nodes, and consumer electronics.

The device comes in an 8-pin SOIC package (SSFR denotes the tape and reel packaging), making it exceptionally suitable for applications where board real estate is at a premium. Despite its small size, it operates over a wide voltage range (1.8V to 5.5V), enabling deployment in everything from battery-powered devices to mains-powered systems.

Key Features and Peripheral Integration

The true strength of the ATTINY402 lies in its rich set of integrated peripherals, which help minimize external component count and reduce total system cost.

Advanced Peripherals: It includes a Event System (EVSYS) and Configurable Custom Logic (CCL), allowing for hardware-based inter-peripheral communication and logic operations without CPU intervention. This significantly boosts efficiency and reduces power consumption.

Communication Interfaces: It is equipped with multiple serial communication modules, including a Universal Serial Interface (USI) that can be configured for SPI or I2C, and a Universal Asynchronous Receiver/Transmitter (UART).

Analog Capabilities: A 10-bit Analog-to-Digital Converter (ADC) with up to 11 channels and a 16-bit Timer/Counter Type B (TCB) provide essential tools for sensor interfacing and precise timing control.

Robust Operation: Features like the Window Watchdog Timer (WWDT), Power-On Reset (POR), and Brown-Out Detection (BOD) ensure reliable operation in electrically noisy environments.

Application Guide and Design Considerations

The ATTINY402-SSFR excels in a multitude of applications. Its combination of low power, small size, and intelligent peripherals makes it a perfect fit for:

IoT Sensor Nodes: Its low-power sleep modes and robust communication interfaces allow it to collect and transmit sensor data efficiently.

Consumer Electronics: Used in remote controls, toys, and smart accessories for button control, LED dimming, and simple logic tasks.

System Management: Functions as a dedicated companion IC for power sequencing, fan control, and GPIO expansion in larger systems.

When designing with the ATTINY402, leverage the Microchip MPLAB X IDE and the AVR-GCC compiler for software development. Programming and debugging are facilitated through the UPDI (Unified Program and Debug Interface) using a single GPIO pin, simplifying the hardware design. Always consult the official datasheet for detailed electrical characteristics and timing diagrams to ensure a robust design.

ICGOOODFIND

The Microchip ATTINY402-SSFR is a highly integrated, compact, and cost-effective 8-bit MCU that punches well above its weight. Its blend of core AVR performance, advanced peripherals like CCL and EVSYS, and ultra-low-power operation makes it an exceptional choice for modern embedded designs where efficiency, size, and cost are critical drivers.

Keywords:

ATTINY402, Microcontroller, Low-Power, Embedded Systems, CCL