ATTINY3226-XFR

Overview

The ATTINY3226-XFR is an 8-bit microcontroller from the Microchip tinyAVR® 2 family, featuring a 20 MHz AVR CPU with hardware multiplier. It includes 32 KB Flash, 3 KB SRAM, and 256 B EEPROM. The device offers 18 general-purpose I/O pins in a 20-pin package. Key peripherals include a 12-bit differential ADC with PGA, two USARTs, SPI, TWI, four CCL LUTs, one TCA, two TCBs, and an RTC. Operating voltage ranges from 1.8 V to 5.5 V across industrial (-40°C to +85°C) and extended (-40°C to +125°C) temperature grades.

Feature Summary

• Features a high-performance low-power AVR CPU running at up to 20 MHz with single-cycle I/O access and a two-cycle hardware multiplier.
• Includes advanced analog features such as a 12-bit differential ADC with Programmable Gain Amplifier (PGA) and multiple internal voltage references.
• Supports flexible inter-peripheral signaling through an Event System and Configurable Custom Logic (CCL) with four programmable Look-Up Tables.
• Provides comprehensive communication interfaces including dual USARTs, Host/Client SPI, and TWI with Fast mode plus support.

Applications

• Industrial control systems requiring robust peripheral integration
• Battery-powered devices utilizing low-power sleep modes
• Automotive applications using AEC-Q100 qualified variants
• Sensor interface nodes leveraging the differential ADC

Procurement Notes

Verify the specific suffix 'XFR' against official Microchip documentation to confirm the exact package type (TSSOP/SSOP) and carrier configuration (Tape & Reel). Ensure the required temperature grade (industrial or extended) matches the project specifications, as performance limits vary by operating range. Confirm availability of the Tape & Reel option directly with authorized distributors.

Selection Notes

Select this component for designs needing vertical migration within the tinyAVR 2 family without code modification. Consider the 20-pin form factor if 18 I/O lines are necessary but 24-pin options are too large. Evaluate the 12-bit ADC resolution and PGA capabilities for precision sensing tasks. Check speed grade requirements against the supply voltage to ensure the target clock frequency is supported.

Part Context

This part belongs to the tinyAVR® 2 family, which shares pin and feature compatibility for easy vertical migration. The ATtiny3226 specifically provides 32 KB Flash and 18 I/Os, bridging the gap between smaller 14-pin devices and larger 24-pin variants. It utilizes the Unified Program and Debug Interface (UPDI) for programming and debugging.

Replacement Considerations

ATtiny3227-XFR (24-pin variant)

FAQ

What is the maximum operating frequency at 1.8V?

At a supply voltage of 1.8V to 5.5V, the device supports operation up to 5 MHz in the industrial temperature range (-40°C to +85°C).

Does the device support external interrupts on all pins?

Yes, the ATtiny3226 provides external interrupt capability on all 18 general-purpose I/O pins.