ATTINY85-20MU

Overview

The ATTINY85-20MU is an 8-bit AVR microcontroller featuring 8K bytes of In-System Programmable Flash, 512 bytes of EEPROM, and 512 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 a 10-bit ADC with four single-ended channels, two timers/counters, and six programmable I/O lines. It utilizes a 20-pad QFN/MLF package (4 x 4 x 0.8 mm) and supports industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Advanced RISC architecture executing most instructions in a single clock cycle for high throughput efficiency.
• Integrated non-volatile memory systems including ISP Flash, EEPROM, and SRAM with data security lock bits.
• Comprehensive peripheral set comprising a 10-bit ADC, dual timer/counters, USI interface, and analog comparator.
• Multiple software-selectable power-saving modes including Idle, ADC Noise Reduction, and Power-down.

Applications

• Sensor interfacing utilizing the integrated 10-bit ADC and low-power consumption characteristics.
• Simple programmable logic implementation in embedded circuits requiring minimal pin count.
• Wearable devices and activity trackers prioritizing ultra-low static power consumption during sleep modes.
• Automated control systems employing the on-chip watchdog timer and reset capabilities.

Procurement Notes

Verify the specific ordering code against the manufacturer's official documentation to ensure correct speed grade and package configuration. Confirm that the MLF variant matches the required thermal and mechanical specifications for the target PCB layout. Cross-reference the RoHS compliance status and lead finish requirements with current manufacturing standards before finalizing procurement orders.

Selection Notes

Select this component when design constraints require a balance between processing capability and physical footprint. The 20MHz speed grade is suitable for applications needing efficient instruction execution within the 2.7V to 5.5V operating range. Consider the 20-pad MLF package for surface-mount assembly where space optimization is critical compared to through-hole alternatives.

Part Context

This microcontroller belongs to the ATtiny family, which provides low-cost, low-power solutions based on the AVR enhanced RISC architecture. The ATTINY85 variant specifically offers higher memory capacity than its smaller counterparts while maintaining the same compact form factor and peripheral integration suitable for resource-constrained embedded designs.

Replacement Considerations

Compatible substitutes include other variants within the ATtiny25/45/85 series, such as ATTINY85-10MU or ATTINY85-20PU, provided the speed grade and package type align with the existing hardware design constraints.