ATMEGA165PA-MN Equivalent & Substitute Parts

Part Overview

The ATMEGA165PA-MN is an 8-bit AVR microcontroller manufactured by Microchip Technology, designed for embedded applications requiring moderate processing capability and integrated peripherals. This device features 16KB of Flash program memory, 1KB of RAM, and 512 bytes of EEPROM, operating at 16MHz with a supply voltage range of 1.8V to 5.5V. The part is currently in active production status with full RoHS3 compliance and REACH unaffected designation. Identifying equivalent and substitute parts is essential for supply chain continuity, design flexibility, and procurement optimization.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	16MHz
Program Memory Size	16KB (8K x 16)
Program Memory Type	FLASH
EEPROM Size	512 x 8
RAM Size	1K x 8
Voltage - Supply (Vcc/Vdd)	1.8V ~ 5.5V
Number of I/O	54
Data Converters	A/D 8x10b
Connectivity	SPI, UART/USART, USI
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Oscillator Type	Internal
Operating Temperature	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount
Package / Case	64-VFQFN Exposed Pad
Supplier Device Package	64-QFN (9x9)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the ATMEGA165PA-MN is determined by strict equivalence across the following critical parameters:

Core Architecture: AVR 8-bit processor
Memory Configuration: 16KB Flash, 1KB RAM, 512 bytes EEPROM
Operating Frequency: 16MHz
Supply Voltage Range: 1.8V ~ 5.5V
I/O Count: 54 pins
Package Format: 64-QFN (9x9) with exposed pad
Peripheral Set: SPI, UART/USART, USI connectivity with Brown-out Detect/Reset, POR, PWM, and WDT
Data Conversion: 8-channel 10-bit analog-to-digital converter
Compliance: RoHS3 and REACH requirements

Parts meeting all these parameters are classified as direct parametric equivalents. No parameter deviation is permitted for substitution classification.

Parameter Comparison

Parameter	ATMEGA165PA-MN (Main Part)	ATMEGA165PA-MN (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Core Processor	AVR	AVR
Core Size	8-Bit	8-Bit
Speed	16MHz	16MHz
Program Memory Size	16KB (8K x 16)	16KB (8K x 16)
EEPROM Size	512 x 8	512 x 8
RAM Size	1K x 8	1K x 8
Voltage - Supply (Vcc/Vdd)	1.8V ~ 5.5V	1.8V ~ 5.5V
Number of I/O	54	54
Data Converters	A/D 8x10b	A/D 8x10b
Connectivity	SPI, UART/USART, USI	SPI, UART/USART, USI
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Oscillator Type	Internal	Internal
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	64-VFQFN Exposed Pad	64-VFQFN Exposed Pad
Supplier Device Package	64-QFN (9x9)	64-QFN (9x9)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The ATMEGA165PA-MN maintains active product status with full regulatory compliance including RoHS3 certification and REACH unaffected classification. Selection of equivalent parts should prioritize devices with identical parametric specifications and matching compliance certifications. The 64-QFN package format with exposed pad requires PCB layout compatibility verification. Surface mount assembly processes must accommodate the 9x9mm footprint and thermal management requirements of the exposed pad design. Moisture sensitivity level 3 (168 hours) necessitates appropriate storage and handling protocols during manufacturing.

Frequently Asked Questions (FAQ)

Q: What defines a direct substitute for the ATMEGA165PA-MN? A: A direct substitute must match all electrical parameters including 8-bit AVR core architecture, 16MHz operation, 16KB Flash memory, 1KB RAM, 512 bytes EEPROM, 54 I/O pins, and identical peripheral configuration. The package format must be 64-QFN (9x9) with exposed pad, and compliance certifications must be equivalent.

Q: Are there parametric variants of the ATMEGA165PA-MN with different memory configurations? A: Based on the provided specifications, only the ATMEGA165PA-MN with 16KB Flash, 1KB RAM, and 512 bytes EEPROM is documented. Variants with different memory sizes would constitute different part numbers and are not substitutes.

Q: What is the significance of the 64-QFN (9x9) package format? A: The 64-QFN package is a surface mount quad flat no-lead package with 9x9mm dimensions and an exposed thermal pad. This package format is critical for thermal dissipation and electrical performance. Substitutes must use identical package geometry to ensure PCB compatibility without redesign.

Q: Does the exposed pad require special PCB design considerations? A: Yes. The exposed pad on the 64-VFQFN package must be properly connected to ground or power planes as specified in the device datasheet to ensure thermal management and electrical performance. PCB layout must accommodate the pad dimensions and connection requirements.

Q: What does RoHS3 compliance indicate? A: RoHS3 compliance certifies that the device meets Restriction of Hazardous Substances Directive requirements, restricting the use of lead, cadmium, mercury, and other hazardous materials. Substitute parts must maintain equivalent RoHS3 certification for regulatory compliance in target markets.

Q: Is the REACH unaffected status important for substitution? A: Yes. REACH unaffected status indicates the device does not contain substances of very high concern (SVHC) requiring authorization. Substitute parts must maintain equivalent REACH status to ensure compliance with European chemical regulations.

Q: What does Moisture Sensitivity Level 3 mean for handling? A: MSL 3 indicates the device requires storage at controlled humidity (not exceeding 60% RH) for a maximum of 168 hours before soldering. Exceeding this exposure period requires baking at 125°C for 24 hours. Substitute parts with identical MSL ratings require the same handling protocols.

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