ATMEGA165-16AI Equivalent & Substitute Parts

Part Overview

The ATMEGA165-16AI is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 16KB of FLASH program memory, 1KB of RAM, and 512 bytes of EEPROM. This device operates at 16MHz with a supply voltage range of 2.7V to 5.5V and is housed in a 64-TQFP package. The ATMEGA165-16AI is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and production continuity.

Substiute Parts

ATMEGA165-16AI

Microchip TechnologyIn Stock: 4201ATMEGA165-16AI Datasheet

Current PartRFQ

ATMEGA165P-16AU

Microchip TechnologyIn Stock: 1432ATMEGA165P-16AU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATMEGA165-16AI is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must maintain identical specifications for core processor architecture, memory configuration, operating frequency, supply voltage range, I/O count, peripheral set, temperature range, and physical package dimensions.

The ATMEGA165P-16AU qualifies as a direct substitute based on the following matching parameters:

• Core Processor: AVR (identical)
• Core Size: 8-Bit (identical)
• Speed: 16MHz (identical)
• Program Memory: 16KB FLASH (identical)
• EEPROM: 512 x 8 (identical)
• RAM: 1K x 8 (identical)
• Voltage Supply: 2.7V ~ 5.5V (identical)
• I/O Count: 54 (identical)
• Data Converters: A/D 8x10b (identical)
• Connectivity: SPI, UART/USART, USI (identical)
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT (identical)
• Operating Temperature: -40°C ~ 85°C (identical)
• Package: 64-TQFP (14x14) (identical)
• Mounting Type: Surface Mount (identical)
• MSL: 3 (168 Hours) (identical)

Parameter Comparison

Engineering Selection Recommendations

The ATMEGA165P-16AU is the direct substitute for the ATMEGA165-16AI. Both devices are electrically and mechanically identical across all specified parameters. The primary distinction is product lifecycle status: the ATMEGA165-16AI is obsolete, while the ATMEGA165P-16AU maintains active production status.

The ATMEGA165P-16AU offers improved regulatory compliance, meeting ROHS3 requirements compared to the non-compliant status of the original part. Both devices maintain identical REACH unaffected status and EAR99 export classification.

For new designs or production continuity, the ATMEGA165P-16AU is the appropriate selection due to its active availability and regulatory compliance posture.

Frequently Asked Questions (FAQ)

Q: Are the ATMEGA165-16AI and ATMEGA165P-16AU pin-compatible?

A: Yes. Both devices use the 64-TQFP (14x14) package with identical pin assignments, I/O configuration (54 I/O), and electrical characteristics.

Q: What is the difference between these two part numbers?

A: The ATMEGA165P-16AU is the active production equivalent of the obsolete ATMEGA165-16AI. Electrical and mechanical specifications are identical. The substitute part includes ROHS3 compliance certification.

Q: Can the ATMEGA165P-16AU be used as a direct replacement in existing designs?

A: Yes. The ATMEGA165P-16AU maintains full electrical and mechanical compatibility with the ATMEGA165-16AI across all specified parameters, including memory configuration, operating frequency, supply voltage range, I/O count, peripheral set, and package dimensions.

Q: Are there any differences in memory specifications?

A: No. Both parts feature identical memory configuration: 16KB FLASH program memory, 1KB RAM, and 512 bytes EEPROM.

Q: What is the operating temperature range for both devices?

A: Both the ATMEGA165-16AI and ATMEGA165P-16AU operate across -40°C to 85°C (TA).

Q: Are both parts suitable for industrial applications?

A: Yes. Both devices support the full industrial temperature range of -40°C to 85°C and maintain identical peripheral functionality including brown-out detection, power-on reset, PWM, and watchdog timer.