ATTINY28L-4AI

Overview

The ATTINY28L-4AI is an 8-bit microcontroller based on the AVR RISC architecture, manufactured by Microchip Technology. It features 2K bytes of Flash program memory and operates at speeds up to 4 MHz. The device supports a supply voltage range of 2.7V to 5.5V and functions within an industrial temperature range of -40°C to +85°C. It includes 11 programmable I/O lines, an 8-bit Timer/Counter, an analog comparator, and a high-current LED driver.

Feature Summary

• Utilizes the AVR RISC architecture for high-performance processing with most instructions executing in a single clock cycle.
• Incorporates nonvolatile Flash program memory with endurable write/erase cycles and programming lock capabilities.
• Features specialized peripherals including an interrupt-on-low-level input, programmable watchdog timer, and built-in high-current LED driver.

Applications

• Embedded control applications requiring low-power operation
• IoT sensor nodes utilizing the high-current LED driver
• Industrial monitoring systems operating in extreme temperatures

Procurement Notes

Verify the specific suffix 'AI' confirms the industrial temperature rating (-40°C to +85°C) and 4 MHz speed grade. Confirm package type matches design requirements, as this part number corresponds to the 32-lead TQFP package. Ensure compatibility with existing firmware compiled for the ATtiny28L core before integration.

Selection Notes

Select this component when an industrial-grade environment requires reliable performance between -40°C and +85°C. The 4 MHz speed grade offers higher throughput compared to the 1.2 MHz variants suitable for lower power needs. Consider the 32-lead TQFP package if surface-mount assembly with a larger footprint is preferred over MLF or PDIP options.

Part Context

This device belongs to the ATtiny28 family, which provides a cost-effective solution for embedded control. The 'L' variant specifically denotes the 2.7V to 5.5V operating voltage range, distinguishing it from the 'V' series that supports lower voltages down to 1.8V. The 'I' suffix indicates the industrial temperature qualification.

Replacement Considerations

ATtiny28L-4AC (Commercial temp)

FAQ

What is the minimum operating voltage for the ATTINY28L-4AI?

The minimum operating voltage is 2.7V.

Does the ATTINY28L-4AI include an Analog-to-Digital Converter (ADC)?

No, the datasheet does not list an ADC; it features an on-chip Analog Comparator instead.