ATTINY461-20SUR

Overview

The ATTINY461-20SUR is an 8-bit AVR microcontroller featuring 4K bytes of In-System Programmable Flash, 256 bytes of EEPROM, and 256 bytes of SRAM. It operates at a maximum clock frequency of 20 MHz with a supply voltage range of 2.7V to 5.5V. The device includes an 11-channel 10-bit ADC, two timers/counters, and a Universal Serial Interface. It utilizes a 20-pin SOIC package 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 systems including self-programmable Flash and EEPROM with specified endurance ratings.
• Integrated analog peripherals comprising a 10-bit ADC with multiple channels and an on-chip analog comparator.
• Comprehensive power management capabilities supporting multiple low-power sleep modes.

Applications

• Battery-powered embedded systems requiring low active and standby current consumption.
• Industrial control applications utilizing the industrial temperature range and robust I/O lines.
• Sensor interface circuits leveraging the multi-channel ADC and programmable gain amplifier options.
• Communication nodes employing the Universal Serial Interface for data exchange.

Procurement Notes

Verify the specific suffix 'SUR' corresponds to the 20-pin SOIC package variant when sourcing components. Confirm that the operating voltage requirements align with the 2.7V to 5.5V specification for standard ATtiny461 devices rather than the V-series variants. Ensure compatibility with existing PCB footprints designed for the SOIC-20 form factor during procurement planning.

Selection Notes

Select this component when a balance of processing speed up to 20 MHz and moderate memory capacity is required. Consider the ATTINY461-20SUR over smaller variants if the application demands more Flash space or additional I/O lines compared to the ATtiny261 series. Evaluate the need for the specific SOIC package style versus through-hole alternatives based on assembly constraints.

Part Context

This part belongs to the ATtiny461 family within Microchip's 8-bit AVR microcontroller portfolio. It shares architectural similarities with the ATtiny261 and ATtiny861, differing primarily in memory sizes. The device represents a mature technology node optimized for cost-sensitive applications requiring reliable performance in compact packages.

Replacement Considerations

Direct pin-compatible substitutes include the ATtiny261-20SUR and ATtiny861-20SUR, provided memory size adjustments are acceptable. Verify electrical specifications such as maximum clock frequency and voltage ranges when cross-referencing with other AVR families.