ATTINY85-20SUR

Overview

The ATTINY85-20SUR is an 8-bit AVR microcontroller featuring 8K bytes of In-System Programmable Flash, 512 bytes of EEPROM, and 512 bytes of SRAM. It operates at a maximum clock frequency of 20 MHz within the 4.5V to 5.5V supply range, or up to 10 MHz across the 2.7V to 5.5V range. The device utilizes an 8-pin SOIC package with tape-and-reel packaging (indicated by the 'R' suffix). It includes six programmable I/O lines, a 10-bit ADC, and supports industrial temperature ranges.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput efficiency.
• Non-volatile memory system with high endurance specifications for both program Flash and data EEPROM.
• Integrated peripheral set including a Universal Serial Interface, analog comparator, and multiple timer/counters.
• Supports low-power operation through selectable Idle, ADC Noise Reduction, and Power-down modes.

Applications

• In-system programming via SPI serial interface
• Battery-powered embedded systems requiring low active and standby current
• Applications utilizing the Universal Serial Interface for communication protocols
• Sensor nodes employing the internal 10-bit ADC

Procurement Notes

Verify the specific ordering code against the manufacturer's official documentation to ensure correct speed grade and voltage compatibility. Confirm that the tape-and-reel packaging designation matches the automated assembly requirements of the production line. Cross-reference the industrial temperature range specifications with the operational environment constraints of the final application design.

Selection Notes

Select this component when 8KB of program memory is required alongside robust non-volatile storage capabilities. The 20MHz speed grade is suitable for applications demanding higher processing throughput within the standard 5V logic domain. Ensure the design accommodates the 8-pin physical footprint and utilizes the available Port B pins for necessary I/O expansion and peripheral control functions.

Part Context

This device belongs to the ATtiny family of 8-bit AVR microcontrollers manufactured by Microchip Technology. It shares architectural similarities with the ATtiny25 and ATtiny45 variants, primarily distinguished by its larger 8KB Flash memory capacity. The series is designed for cost-sensitive applications requiring compact form factors and efficient power management.

Replacement Considerations

ATtiny85-20SU

FAQ

What does the 'R' suffix indicate in the part number ATTINY85-20SUR?

The 'R' suffix denotes that the device is supplied in tape-and-reel packaging format.

How many general-purpose I/O lines are available on this microcontroller?

The device provides six programmable I/O lines accessible through Port B.

Is the ATTINY85-20SUR capable of in-system programming?

Yes, the device supports In-System Programming (ISP) via the SPI port.