ATMEGA6450-16AI Equivalent & Substitute Parts

Part Overview

The ATMEGA6450-16AI is an 8-bit AVR microcontroller from Microchip Technology featuring 64KB FLASH memory, 4KB RAM, and 2KB EEPROM. This device operates at 16MHz with a supply voltage range of 2.7V to 5.5V and is housed in a 100-TQFP package. The part is currently listed as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.

Substiute Parts

ATMEGA6450-16AI

Microchip TechnologyIn Stock: 2046ATMEGA6450-16AI Datasheet

Current PartRFQ

ATMEGA6450-16AU

Microchip TechnologyIn Stock: 824ATMEGA6450-16AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATMEGA6450-16AI is determined by strict equivalence across the following critical parameters:

• Core Architecture: AVR processor family
• Memory Configuration: 64KB FLASH, 4KB RAM, 2KB EEPROM
• Operating Frequency: 16MHz
• Supply Voltage Range: 2.7V ~ 5.5V
• I/O Count: 68 pins
• Package Format: 100-TQFP (14x14)
• Peripheral Set: SPI, UART/USART, USI connectivity with Brown-out Detect/Reset, POR, PWM, WDT
• Data Conversion: 8-channel 10-bit A/D converter
• Temperature Range: -40°C ~ 85°C

The ATMEGA6450-16AU meets all these criteria and qualifies as a direct substitute. The primary distinction between these parts is packaging type and product status, not functional or electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The ATMEGA6450-16AU is the direct functional equivalent of the ATMEGA6450-16AI. Both devices share identical electrical specifications, memory configurations, and peripheral sets. Selection between these parts should be based on the following factors:

Product Status: The ATMEGA6450-16AI is obsolete, while the ATMEGA6450-16AU maintains active product status. For new designs or long-term production requirements, the ATMEGA6450-16AU is the appropriate choice.

Regulatory Compliance: The ATMEGA6450-16AU is ROHS3 compliant, whereas the ATMEGA6450-16AI is RoHS non-compliant. Applications subject to RoHS regulations require the ATMEGA6450-16AU.

Packaging Considerations: The ATMEGA6450-16AI is supplied in tube packaging, while the ATMEGA6450-16AU is supplied in tray packaging. Packaging selection depends on production volume and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the ATMEGA6450-16AU directly replace the ATMEGA6450-16AI in existing designs?

A: Yes. Both parts are electrically and functionally identical across all specified parameters including memory, speed, I/O count, voltage range, and peripheral configuration. No circuit modifications are required for substitution.

Q: What is the difference between the ATMEGA6450-16AI and ATMEGA6450-16AU?

A: The primary differences are product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), and packaging format (tube vs. tray). All electrical and functional specifications are identical.

Q: Why is the ATMEGA6450-16AI listed as obsolete?

A: Microchip Technology has discontinued this part number. The ATMEGA6450-16AU serves as the active replacement with identical functionality.

Q: Are there any pin compatibility issues between these parts?

A: No. Both parts use the 100-TQFP (14x14) package with 68 I/O pins in identical configurations. Pin-for-pin compatibility is complete.

Q: Does the packaging type affect electrical performance?

A: No. Tube and tray packaging are handling and storage formats only. They do not affect device electrical characteristics, performance, or reliability.

Q: What supply voltage range do these microcontrollers support?

A: Both the ATMEGA6450-16AI and ATMEGA6450-16AU operate across a supply voltage range of 2.7V to 5.5V, supporting both 3.3V and 5V system designs.

Q: Are these parts suitable for industrial temperature applications?

A: Both parts operate across the temperature range of -40°C to 85°C (TA), which covers industrial and extended commercial temperature requirements.