ATTINY261A-MU

Overview

The ATTINY261A-MU is an 8-bit AVR microcontroller featuring 2 KByte of In-System Programmable Flash, 128 Bytes of EEPROM, and 128 Bytes of SRAM. It operates at a maximum clock frequency of 20 MHz with a supply voltage range of 1.8 V to 5.5 V. The device includes 16 programmable I/O lines, an 11-channel 10-bit ADC, two timers/counters, and a Universal Serial Interface (USI). It is housed in a 32-pad Micro Lead Frame Package (MLF) with dimensions of 5 x 5 mm.

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 analog peripherals comprising a 10-bit ADC with differential channels and an on-chip analog comparator.
• Supports multiple power-saving sleep modes including Idle, Power-down, Standby, and ADC Noise Reduction.

Applications

• Battery-powered systems requiring low active and standby current consumption.
• Applications utilizing capacitive touch sensing interfaces via QTouch Library support.
• Systems requiring hardware-based solutions with timer/counter PWM outputs.
• Devices needing in-system programming capabilities through SPI serial interface.

Procurement Notes

Verify the specific speed grade and package variant when ordering, as the base part number covers multiple configurations. Confirm that the MLF package requires soldering the center pad to ground for mechanical stability. Ensure compatibility with development tools such as debugWIRE for debugging purposes. Check RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select this component for designs prioritizing code efficiency and low power operation within the industrial temperature range. Consider the 2 KByte Flash limit for larger applications where ATtiny461A or ATtiny861A might be more suitable. Evaluate the need for differential ADC inputs which are available on this device but not all variants. Ensure the 32-pin MLF footprint fits the PCB layout constraints.

Part Context

This device belongs to the ATtinyx61A family of 8-bit microcontrollers based on the AVR enhanced RISC architecture. The family includes variants with different memory sizes, such as the ATtiny461A and ATtiny861A, sharing similar peripheral sets and core functionalities. The ATTINY261A-MU specifically denotes the 2 KByte Flash version in the 32-pad MLF package.

Replacement Considerations

ATtiny461A-MU

FAQ

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

The projected data retention failure rate is much less than 1 PPM over 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 Arithmetic Logic Unit.