ATTINY461-20MUR

Overview

The ATTINY461-20MUR 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 frequency of 20 MHz with a supply voltage range of 2.7V to 5.5V. The device includes 16 programmable I/O lines, an 11-channel 10-bit ADC, two timers/counters, and a Universal Serial Interface. It supports debugWIRE and SPI programming within the industrial temperature range.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput.
• Non-volatile memory segments including Flash, EEPROM, and SRAM with specified endurance ratings.
• Integrated peripheral suite comprising a 10-bit ADC, analog comparator, and multiple timer/counters.
• Low power consumption with selectable sleep modes including Idle, Power-down, and Standby.

Applications

• Battery-powered embedded systems requiring low active and standby current.
• Industrial control applications utilizing the industrial temperature range and robust I/O capabilities.
• Sensor interface designs leveraging the multi-channel 10-bit ADC and analog comparator.
• Communication nodes using the Universal Serial Interface (USI) for SPI or I2C protocols.

Procurement Notes

Verify the specific suffix 'MUR' against official Microchip documentation to confirm package type and tape-and-reel specifications. Ensure the operating voltage and speed grade requirements align with the 2.7V–5.5V range and 20MHz limit. Confirm RoHS compliance status through the manufacturer's latest release notes before finalizing procurement orders.

Selection Notes

Select this component when 4K Flash and 256 bytes of data memory are sufficient for the application logic. The 20-pin MLF package offers a compact footprint suitable for space-constrained designs. Consider the 20MHz speed grade if higher processing throughput is required compared to lower-speed variants. Verify that the 16 available I/O lines meet the pin count requirements for the target system.

Part Context

This part belongs to the ATtiny461 family of 8-bit AVR microcontrollers manufactured by Microchip Technology. It shares architectural similarities with the ATtiny261 and ATtiny861, differing primarily in memory sizes. The device utilizes the enhanced AVR RISC core, providing a balance of performance and power efficiency for general-purpose embedded control tasks.

Replacement Considerations

Direct substitutes include other members of the ATtiny461 series such as ATTINY461-20SU or ATTINY461-20PU, depending on the required package format. Cross-family replacements like the ATtiny861 offer increased memory but may require software adjustments. Always verify pin compatibility and electrical characteristics before substituting.