ATTINY861-15MZ

Overview

The ATTINY861-15MZ is an automotive-grade, low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. It features 8K bytes of in-system programmable Flash memory, 512 bytes of EEPROM, and 512 bytes of internal SRAM. The device operates within a voltage range of 2.7V to 5.5V and supports clock frequencies up to 16MHz at 4.5V to 5.5V. It includes 16 programmable I/O lines, a 10-bit ADC with multiple channels, timers, counters, and a universal serial interface. Designed for harsh environments, it meets AEC-Q100 Grade 1 standards and functions across an extended temperature range of –40°C to +125°C.

Feature Summary

• Automotive-grade reliability verified against AEC-Q100 Grade 1 standards and ISO-TS 16949 requirements.
• High-performance AVR CPU executing most instructions in a single clock cycle for efficient processing.
• Integrated non-volatile memories including Flash, EEPROM, and SRAM with high endurance ratings.
• Comprehensive peripheral set featuring a 10-bit ADC, analog comparator, and multiple timer/counter units.

Applications

• Automotive control systems requiring extended temperature operation
• Industrial control applications demanding high reliability
• Embedded systems utilizing debugWIRE for in-circuit debugging

Procurement Notes

Verify that the specific part number corresponds to the Automotive grade variant with the 'Z' temperature identifier. Confirm the package type matches the required PCB layout, as this model utilizes a 32-pad MLF package. Ensure design compliance with the specified operating voltage and frequency limits for the target supply conditions. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Selection Notes

Select this component when automotive qualification and wide temperature tolerance are mandatory. The 16MHz speed grade provides sufficient throughput for complex logic while maintaining low power consumption. Consider the 32-pad MLF package constraints regarding thermal dissipation and soldering requirements. Evaluate the available I/O count and ADC channels against system sensor and actuator interfaces before finalizing the selection.

Part Context

This microcontroller belongs to the ATtiny261/461/861 family, which shares a common core architecture but varies in memory sizes. The ATTINY861 specifically offers the largest memory configuration within this series. It is distinct from standard commercial variants by its rigorous automotive testing and extended temperature range specifications.

Replacement Considerations

Direct substitutes include other members of the ATtinyx61 automotive family, such as the ATTINY461 or ATTINY261, provided memory requirements allow. Verify that alternative packages match the physical footprint if board space is constrained.