ATMEGA325-16AUR

Microcontrollers Overview

The ATMEGA325-16AUR is an 8-bit AVR microcontroller featuring 32KB of In-System Programmable Flash, 1KB EEPROM, and 2KB SRAM. It operates at speeds up to 16MHz with a supply voltage range of 4.5V to 5.5V. The device includes 54 programmable I/O lines, an 8-channel 10-bit ADC, JTAG interface, and multiple timers. It is housed in a 64-lead TQFP package and supports industrial temperature ranges from -40°C to 85°C.

Microcontrollers Feature Summary

• Advanced RISC architecture achieving up to 16 MIPS throughput at 16MHz
• In-System Programmable Flash with Read-While-Write capabilities
• JTAG interface for boundary-scan and on-chip debugging support
• Five software selectable power saving modes including Power-down

Microcontrollers Applications

• Embedded control systems requiring non-volatile memory reprogramming
• Applications utilizing capacitive touch sensing via QTouch library
• Industrial environments operating within extended temperature ranges
• Systems requiring hardware debugging through JTAG interfaces

Microcontrollers Procurement Notes

Verify the specific speed grade suffix against the required operational frequency. Confirm that the 16AUR designation aligns with the necessary voltage and thermal specifications for the target application environment. Ensure compatibility with existing PCB footprints for the 64-lead TQFP package before finalizing procurement orders.

Microcontrollers Selection Notes

Select this component when 32KB program memory and 54 I/O lines are sufficient for the design requirements. Consider the 16MHz maximum clock speed for processing performance needs. Evaluate the 4.5V to 5.5V operating voltage range against available power supplies. Verify that the TQFP package dimensions fit the mechanical constraints of the assembly.

Microcontrollers Part Context

This part belongs to the ATmega325 family, which shares architectural similarities with the ATmega3250, ATmega645, and ATmega6450. Differences primarily involve memory sizes and pin counts. The ATmega325 variant specifically provides 32KB Flash and 54 I/O pins, distinguishing it from higher capacity or pin-count siblings within the same series.

Microcontrollers Replacement Considerations

ATMEGA325-AU

Microcontrollers FAQ

Does the ATMEGA325-16AUR support On-Chip Debugging?

Yes, the device includes a JTAG interface compliant with IEEE std. 1149.1, which supports extensive on-chip debugging and programming capabilities.

What is the data retention period for the Flash memory?

The projected data retention is 20 years at 85°C or 100 years at 25°C based on reliability qualification results.