ATTINY461A-MU

Overview

The ATTINY461A-MU 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 speeds up to 20 MHz with a supply voltage range of 1.8V to 5.5V. The device includes an 11-channel 10-bit ADC, three high-frequency PWM outputs, and a programmable dead time generator. It utilizes a fully static advanced RISC architecture for efficient power management.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle
• High endurance non-volatile memory segments with software security lock
• Integrated 10-bit analog-to-digital converter with multiple channel options
• Programmable watchdog timer with separate on-chip oscillator

Applications

• Low-power embedded control systems
• Industrial sensor interfaces
• Battery-operated devices requiring extended data retention
• Motor control applications utilizing PWM and dead time generation

Procurement Notes

Verify the specific speed grade and package configuration against project requirements before ordering. Confirm that the industrial temperature range meets environmental specifications. Ensure programming tools support the SPI interface for in-system programming. Check for any specific handling requirements associated with the MLF package type.

Selection Notes

Select this component when 4K program memory and 256 bytes of data storage are sufficient for the application logic. Consider the 20 MHz maximum throughput for timing-critical tasks. Evaluate the 1.8V minimum operating voltage for low-power battery designs. Verify that the 32-pad MLF package fits within the available PCB footprint constraints.

Part Context

This part belongs to the ATtiny461A family within the broader ATtiny261A/461A/861A series. It shares the same core architecture and peripheral set as its siblings but differs in memory capacity. The -MU suffix indicates the 32-pad Micro Lead Frame (MLF) package variant designed for surface-mount assembly.

Replacement Considerations

ATtiny461A-SU

FAQ

What is the data retention period for the non-volatile memory?

The data retention is specified as 20 years at 85°C or 100 years at 25°C.

How many general purpose working registers does the CPU have?

The device features 32 x 8 general purpose working registers directly connected to the ALU.