ATTINY44A-MMH

Overview

The ATTINY44A-MMH is an 8-bit microcontroller from the AVR ATtiny family, manufactured by Microchip Technology. It features 4KB of In-System Programmable Flash memory, 256 bytes of EEPROM, and 256 bytes of SRAM. The device operates on a supply voltage range of 1.8V to 5.5V and supports clock speeds up to 20MHz at 4.5V–5.5V. It includes one 8-bit and one 16-bit Timer/Counter with PWM channels, an 8-channel 10-bit ADC with programmable gain, and a Universal Serial Interface (USI). The component is housed in a 20-VQFN package with dimensions of 3x3 mm and is rated for industrial temperatures between -40°C and +85°C.

Feature Summary

• Advanced RISC architecture delivering nearly 1 MIPS per MHz throughput with single-clock cycle instruction execution.
• Integrated non-volatile memory segments including self-programmable Flash, EEPROM, and SRAM with high endurance ratings.
• Comprehensive peripheral set featuring dual timer/counters with PWM, a 10-bit ADC with differential inputs, and USI communication interface.
• Supports multiple low-power sleep modes including Idle, ADC Noise Reduction, Standby, and Power-down to optimize energy consumption.

Applications

• Battery-powered consumer electronics requiring low active and standby current consumption.
• Industrial control systems utilizing the industrial temperature range and robust reset circuits.
• Sensor interfaces leveraging the 10-bit ADC with programmable gain for signal conditioning.
• Embedded applications using the Universal Serial Interface for simplified serial communication protocols.

Procurement Notes

Verify the specific suffix MMH corresponds to the 20-VQFN (3x3) package when ordering. Confirm that the industrial temperature grade (-40°C to +85°C) meets your environmental requirements. Ensure programming tools support the SPI-based In-System Programming interface. Check for any recent Product Change Notifications regarding marking or packaging updates from the manufacturer.

Selection Notes

Select this model if your design requires exactly 4KB of Flash memory; other variants in the series offer different capacities. Consider the 20-pin QFN package constraints for PCB layout and thermal dissipation. Evaluate the 1.8V minimum supply voltage against your system's power rails. Verify that the 12 available I/O lines are sufficient for your peripheral connections.

Part Context

This component belongs to the ATtiny24A/44A/84A series, which shares a common core architecture and peripheral set. The '44' designation indicates the 4KB Flash capacity variant within this family. These devices are designed as low-cost, low-power solutions for embedded control tasks, offering a balance of processing speed and energy efficiency suitable for resource-constrained applications.

Replacement Considerations

Direct substitutes within the same package and pinout include the ATTINY44A-MU and ATTINY44A-SSFR. Cross-series replacements like the ATTINY84A require verification of memory size compatibility and pin function mapping. Ensure any replacement maintains the required operating voltage and temperature specifications.