Microchip ATTINY85V-10SH 8-bit AVR Microcontroller Datasheet and Design Guide

The Microchip ATTINY85V-10SH stands as a testament to the power of integration, packing a full-featured microcontroller into an ultra-compact 8-pin package. This high-performance, low-power 8-bit AVR RISC-based microcontroller is engineered for applications where space, power, and cost are critical constraints. This article delves into the core specifications and essential design considerations outlined in its official datasheet and design guide.

At the heart of the ATTINY85V-10SH is the powerful AVR RISC architecture, capable of executing most instructions in a single clock cycle. This allows the device to achieve a throughput of up to 10 MIPS (Million Instructions Per Second) when running at its maximum clock frequency of 10 MHz. Its 8K bytes of in-system programmable Flash memory provide ample space for application code, while 512 bytes of EEPROM and 512 bytes of SRAM handle non-volatile data storage and runtime variables, respectively.

A key feature of this microcontroller is its sophisticated on-chip debug system (debugWIRE), which enables easy in-circuit debugging and programming via a single pin, significantly simplifying the development process. Its robust peripheral set is impressive for its size, including:

Two 8-bit timers/counters with PWM capabilities.

A versatile 4-channel, 10-bit ADC (Analog-to-Digital Converter).

Universal Serial Interface (USI) that can be configured for I2C, SPI, or UART protocols.

An internal calibrated oscillator, eliminating the need for an external crystal in many applications.

The "V" in its part number signifies its wide operating voltage range of 1.8V to 5.5V, making it ideal for battery-powered and low-voltage applications. The device is characterized for operation from -40°C to +85°C, ensuring reliability in industrial environments. Designers must pay close attention to power management sections in the design guide. Utilizing sleep modes—Idle, ADC Noise Reduction, Power-down, and Standby—can reduce power consumption to sub-microamp levels, which is crucial for extending battery life.

When designing a PCB with the ATTINY85V-10SH, careful layout is paramount. Decoupling capacitors must be placed as close as possible to the VCC and GND pins to ensure stable operation. For applications using the ADC, proper isolation from digital noise and a clean, stable analog reference voltage are essential for accurate readings. The design guide strongly recommends a well-grounded layout and the use of the internal pull-up resistors on input pins to minimize component count and enhance noise immunity.

ICGOOODFIND: The Microchip ATTINY85V-10SH is an exceptionally capable microcontroller that delivers a high feature-to-size ratio. Its combination of processing power, versatile peripherals, ultra-low power consumption, and a wide voltage range makes it a superior choice for compact, intelligent designs in consumer electronics, IoT sensors, wearable technology, and automated systems. Its comprehensive support through debugWIRE and extensive application notes further solidifies its position as a go-to solution for engineers.

Keywords: Low-Power, AVR RISC, 8-bit Microcontroller, In-System Programmable, DebugWIRE