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ATMEGA3290-16AI Equivalent & Substitute Parts
Part Overview
The ATMEGA3290-16AI is an 8-bit AVR microcontroller from Microchip Technology's ATmega series, featuring 32KB FLASH memory, 2KB RAM, and 1KB EEPROM. This device integrates 69 I/O pins, operates at 16MHz, and supports multiple connectivity protocols including SPI, UART/USART, and USI. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 16MHz |
| Program Memory Size | 32KB (16K x 16) |
| Program Memory Type | FLASH |
| EEPROM Size | 1K x 8 |
| RAM Size | 2K x 8 |
| Number of I/O | 69 |
| Voltage Supply (Vcc/Vdd) | 2.7V ~ 5.5V |
| Data Converters | A/D 8x10b |
| Connectivity | SPI, UART/USART, USI |
| Peripherals | Brown-out Detect/Reset, LCD, POR, PWM, WDT |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 100-TQFP (14x14) |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution of the ATMEGA3290-16AI is determined by strict equivalence across core electrical and mechanical parameters. The substitute part must maintain identical specifications in processor architecture, memory configuration, I/O count, operating voltage range, temperature rating, and package form factor. The ATMEGA3290-16AU qualifies as a direct substitute based on complete parameter alignment across all critical dimensions. The only differentiating factors are product status (obsolete vs. active) and packaging format (tube vs. tray), neither of which affects functional compatibility or electrical performance in circuit applications.
Parameter Comparison
| Parameter | ATMEGA3290-16AI | ATMEGA3290-16AU | Match |
|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Yes |
| Core Processor | AVR | AVR | Yes |
| Core Size | 8-Bit | 8-Bit | Yes |
| Speed | 16MHz | 16MHz | Yes |
| Program Memory Size | 32KB (16K x 16) | 32KB (16K x 16) | Yes |
| Program Memory Type | FLASH | FLASH | Yes |
| EEPROM Size | 1K x 8 | 1K x 8 | Yes |
| RAM Size | 2K x 8 | 2K x 8 | Yes |
| Number of I/O | 69 | 69 | Yes |
| Voltage Supply (Vcc/Vdd) | 2.7V ~ 5.5V | 2.7V ~ 5.5V | Yes |
| Data Converters | A/D 8x10b | A/D 8x10b | Yes |
| Connectivity | SPI, UART/USART, USI | SPI, UART/USART, USI | Yes |
| Peripherals | Brown-out Detect/Reset, LCD, POR, PWM, WDT | Brown-out Detect/Reset, LCD, POR, PWM, WDT | Yes |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | Yes |
| Package / Case | 100-TQFP (14x14) | 100-TQFP (14x14) | Yes |
| Mounting Type | Surface Mount | Surface Mount | Yes |
| Product Status | Obsolete | Active | Different |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | Different |
Engineering Selection Recommendations
The ATMEGA3290-16AU is the direct functional equivalent of the ATMEGA3290-16AI. Both devices share identical electrical specifications, memory architecture, I/O configuration, and package geometry. The primary distinction is product lifecycle status: the ATMEGA3290-16AI is obsolete, while the ATMEGA3290-16AU is active production. Additionally, the ATMEGA3290-16AU achieves ROHS3 compliance, whereas the ATMEGA3290-16AI does not. For new designs or production continuity, the ATMEGA3290-16AU is the appropriate selection. Existing designs using the ATMEGA3290-16AI can transition to the ATMEGA3290-16AU without circuit modification, as all functional and electrical parameters remain unchanged.
Frequently Asked Questions (FAQ)
Q: Can ATMEGA3290-16AU replace ATMEGA3290-16AI in existing designs? A: Yes. All electrical specifications, memory configuration, I/O count, operating voltage, temperature range, and package dimensions are identical. No circuit redesign is required.
Q: What is the difference between ATMEGA3290-16AI and ATMEGA3290-16AU? A: The devices are electrically and functionally identical. The ATMEGA3290-16AI is obsolete; the ATMEGA3290-16AU is in active production. The ATMEGA3290-16AU meets ROHS3 compliance standards, while the ATMEGA3290-16AI does not.
Q: Are there any pin compatibility concerns? A: No. Both parts use the 100-TQFP (14x14) package with identical pinout and 69 I/O pins. PCB footprints and assembly processes are interchangeable.
Q: Does the packaging format affect compatibility? A: Packaging format (tube vs. tray) affects supply chain and handling procedures but does not impact electrical performance or circuit functionality. Component selection and soldering processes remain unchanged.
Q: What compliance certifications apply to each part? A: The ATMEGA3290-16AU is ROHS3 compliant and REACH unaffected. The ATMEGA3290-16AI is RoHS non-compliant but also REACH unaffected. Both carry EAR99 export classification.
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