Description
Product Overview
The Horinktor ATTINY85-20PU is a compact 8‑bit microcontroller designed for engineers, makers, and hobbyists who demand reliable performance in a small footprint. Featuring 8 KB of in‑system programmable flash memory, this device stores firmware securely while allowing rapid updates through a standard SPI interface. Its core is built on Microchip’s proven RISC architecture, delivering efficient instruction execution with minimal power draw, making it ideal for battery‑operated devices. The package includes two identical units, each weighing just 0.634 ounces and measuring 4 × 3 × 0.2 inches, ensuring easy integration into tight spaces. With a maximum operating frequency of 20 MHz, the ATTINY85‑20PU balances speed and energy efficiency, supporting a wide range of applications from wearable electronics to sensor nodes. The device operates seamlessly with popular real‑time operating systems such as FreeRTOS and Linux, providing developers with flexible software environments. Its robust design, backed by Microchip Technology, guarantees long‑term reliability, while the in‑system programmable (ISP) capability simplifies development cycles and reduces time‑to‑market.
![[Product front view showing all components]](https://www.drivenmart.store/wp-content/uploads/2026/07/18e400e2982f4550b4c1b20dfe96434d.jpg)
Usage
Designed for versatile deployment, the ATTINY85‑20PU excels in environments where size, power efficiency, and rapid programmability are critical. In wearable technology, the low‑power core extends battery life, enabling continuous monitoring of health metrics without frequent recharging. For IoT sensor nodes, the 8 KB flash provides ample space for custom firmware that can handle data acquisition, processing, and wireless transmission via external modules. The SPI‑based ISP interface allows developers to update code on‑the‑fly, which is especially useful in field‑deployed devices that require firmware upgrades without physical access. Hobbyists can integrate the microcontroller into DIY projects such as remote‑controlled toys, LED displays, and educational kits, benefiting from its straightforward programming model and extensive community support. Additionally, the device’s compatibility with FreeRTOS and Linux makes it suitable for prototyping embedded systems that require multitasking or lightweight operating system features. Whether embedded in a compact medical device, a smart home controller, or a robotics platform, the ATTINY85‑20PU delivers consistent performance across diverse use cases.
Why Choose Us
Choosing the Horinktor ATTINY85‑20PU means selecting a product that combines industry‑leading technology with meticulous quality control. Each unit undergoes rigorous testing to ensure it meets Microchip’s exacting standards for reliability and performance. Our two‑piece kit provides redundancy and flexibility, allowing developers to prototype multiple designs simultaneously or keep a spare for future projects. The microcontroller’s low‑power consumption translates to longer battery life, a critical factor for portable and remote applications. Moreover, the in‑system programmable SPI interface reduces development overhead by enabling quick firmware revisions without the need for external programmers. Horinktor offers comprehensive technical support, including detailed datasheets, reference designs, and responsive customer service to assist with integration challenges. With a proven track record reflected in a 5‑star rating from early adopters, the ATTINY85‑20PU stands out as a dependable choice for both professional engineers and hobbyist innovators seeking a balance of performance, efficiency, and ease of use.
Key Features
- Compact 8‑bit RISC core delivers high performance while consuming minimal power.
- 8 KB flash memory provides ample space for complex firmware and data storage.
- SPI‑based in‑system programming enables fast, hassle‑free code updates.
- Compatible with FreeRTOS and Linux, offering flexible software environments.
- Includes dedicated technical support and after‑sales service for seamless integration.
FAQ
What development tools are compatible with the ATTINY85‑20PU?
The ATTINY85‑20PU works with a wide range of development environments, including Microchip’s MPLAB X IDE, Atmel Studio, and Arduino IDE. It supports programming via standard SPI programmers such as the AVRISP mkII, USBasp, or any compatible ISP hardware. Additionally, the microcontroller can be integrated into FreeRTOS projects, allowing developers to leverage multitasking capabilities. For Linux‑based development, toolchains like avr‑gcc provide a robust command‑line interface for compiling and flashing code. The flexibility of these tools ensures that both beginners and seasoned engineers can efficiently develop, debug, and deploy applications on this platform.
How does the low‑power mode affect performance?
Low‑power mode is designed to reduce current consumption while maintaining essential functionality. In this mode, the microcontroller disables non‑essential peripherals and scales down the clock frequency, which can extend battery life by up to 10× compared to active operation. Despite the reduced power draw, the core can quickly resume full performance when required, making it suitable for applications that alternate between active processing and idle periods, such as sensor polling or periodic data transmission. The trade‑off is a slight increase in wake‑up latency, but this is typically negligible for most embedded use cases where power efficiency is a priority.
Can the ATTINY85‑20PU be used in safety‑critical applications?
While the ATTINY85‑20PU is a robust and reliable microcontroller, safety‑critical applications often require additional certification and validation processes. The device meets standard industrial reliability criteria and is built on Microchip’s proven architecture, which is widely used in commercial products. For safety‑critical deployments, designers should implement redundancy, error‑checking routines, and thorough testing to meet specific regulatory standards such as IEC 61508 or ISO 26262. The microcontroller’s deterministic behavior and low error rates make it a solid foundation, but additional system‑level safeguards are recommended to achieve full compliance.
What is the maximum operating temperature for this microcontroller?
The ATTINY85‑20PU is rated for an operating temperature range of –40 °C to +85 °C, covering most industrial and consumer environments. This wide temperature tolerance ensures reliable operation in harsh conditions, including outdoor installations, automotive interiors, and manufacturing facilities. For applications that may experience extreme temperatures beyond this range, additional thermal management solutions such as heat sinks or temperature‑controlled enclosures should be considered to maintain performance and longevity.
How does the two‑piece kit benefit prototyping?
Receiving two identical microcontrollers in a single package offers several practical advantages for developers. First, it allows simultaneous testing of multiple design iterations without the need to reorder components, accelerating the development cycle. Second, having a spare unit ensures continuity in case of accidental damage during soldering or handling, reducing downtime. Finally, the kit supports parallel projects, enabling teams to divide work efficiently—one unit can be dedicated to hardware validation while the other focuses on firmware refinement. This flexibility makes the two‑piece kit a cost‑effective solution for both individual makers and collaborative engineering teams.
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