ATTINY3224-SSF

Overview

The ATtiny3224-SSF is a 14-pin microcontroller from the tinyAVR 2 family, featuring a high-performance AVR CPU with hardware multiplier running at up to 20 MHz. It includes 32 KB of in-system self-programmable Flash memory, 3 KB of SRAM, and 256B of EEPROM. The device supports a supply voltage range of 1.8V to 5.5V and offers various clock options including internal oscillators and external crystal inputs. Key peripherals include an Event System, Configurable Custom Logic (CCL), two USARTs, SPI, TWI, and a 12-bit differential ADC with Programmable Gain Amplifier.

Feature Summary

• High-performance low-power AVR CPU with single-cycle I/O access and two-level interrupt controller
• Advanced analog features including a 12-bit differential ADC with Programmable Gain Amplifier
• Flexible peripheral set with Event System for CPU-independent inter-peripheral signaling
• Robust memory architecture with write/erase endurance and data retention capabilities

Applications

• Industrial control systems requiring reliable operation across wide temperature ranges
• Battery-powered devices benefiting from low-power sleep modes and efficient power management
• Sensor interfaces utilizing the high-resolution differential ADC and programmable gain amplifier
• Communication nodes employing USART, SPI, or TWI interfaces for data exchange

Procurement Notes

Verify the specific ordering suffix SSF corresponds to the SOIC 150mil package and standard temperature range as defined in Microchip's official documentation. Confirm that the VAO suffix is not required if automotive qualification per AEC-Q100 is not needed. Ensure compatibility with existing design footprints for 14-pin SOIC packages before finalizing procurement decisions.

Selection Notes

Select this component when 32 KB of Flash memory and 22 general-purpose I/O pins are required in a compact 14-pin form factor. Consider the ATtiny3224 over smaller variants like the ATtiny1624 if larger code space or more I/O resources are necessary. Evaluate the need for the 12-bit ADC with PGA for precision analog applications compared to simpler comparator-based solutions.

Part Context

This device belongs to the tinyAVR 2 family, which emphasizes vertical migration compatibility within the series. The ATtiny3224 shares architectural similarities with the ATtiny3226 and ATtiny3227 but differs in pin count and available I/O resources. It serves as a scalable solution for applications needing increased memory and peripheral density compared to lower-end members of the same family.

Replacement Considerations

Direct substitutes within the same family include the ATtiny3226 and ATtiny3227, provided pin count differences are accommodated. For downward migration, verify feature compatibility with the ATtiny1624 or ATtiny824, noting potential reductions in Flash memory and I/O availability.