ATMEGA32-16AC Equivalent & Substitute Parts

Part Overview

The ATMEGA32-16AC is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 32KB FLASH memory, 2KB RAM, and 1KB EEPROM. This device integrates 32 I/O pins, multiple communication interfaces (I2C, SPI, UART/USART), and operates at 16MHz with an internal oscillator. The ATMEGA32-16AC is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

ATMEGA32-16AC

Microchip TechnologyIn Stock: 1922ATMEGA32-16AC Datasheet

Current PartRFQ

ATMEGA32-16AU

Microchip TechnologyIn Stock: 10033ATMEGA32-16AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ATMEGA32-16AC is determined by strict equivalence across the following critical parameters:

• Core processor architecture (AVR)
• Core size (8-Bit)
• Operating frequency (16MHz)
• Memory configuration (32KB FLASH, 2KB RAM, 1KB EEPROM)
• I/O pin count (32)
• Connectivity interfaces (I2C, SPI, UART/USART)
• Peripheral feature set (Brown-out Detect/Reset, POR, PWM, WDT)
• Data converter specifications (A/D 8x10b)
• Supply voltage range (4.5V ~ 5.5V)
• Package type (44-TQFP)
• Mounting configuration (Surface Mount)

The ATMEGA32-16AU meets all substitution criteria as a direct functional equivalent with identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The ATMEGA32-16AU is the direct substitute for the obsolete ATMEGA32-16AC. Both devices share identical core functionality, memory architecture, I/O configuration, and package specifications. The ATMEGA32-16AU is classified as active product status with current manufacturing availability.

Key differentiation factors:

• ATMEGA32-16AU carries ROHS3 compliance certification, whereas ATMEGA32-16AC is RoHS non-compliant
• ATMEGA32-16AU supports extended operating temperature range (-40°C ~ 85°C) compared to ATMEGA32-16AC (0°C ~ 70°C)
• ATMEGA32-16AU is supplied in Tray packaging with verified programmability status
• ATMEGA32-16AU maintains 9952 units in current inventory stock

For applications requiring RoHS compliance or extended temperature operation, the ATMEGA32-16AU is the appropriate selection. Electrical and functional compatibility is complete across all specified parameters.

Frequently Asked Questions (FAQ)

Q: Are ATMEGA32-16AC and ATMEGA32-16AU pin-compatible?

A: Yes. Both devices utilize the 44-TQFP (10x10) package with identical pin assignments, I/O configuration, and signal definitions. Direct PCB footprint compatibility is confirmed.

Q: What is the primary reason for substitution?

A: The ATMEGA32-16AC is classified as obsolete. The ATMEGA32-16AU provides identical functionality with active product status and current manufacturing availability.

Q: Do the devices have different memory specifications?

A: No. Both devices feature 32KB FLASH program memory, 2KB RAM, and 1KB EEPROM with identical organization and access characteristics.

Q: Is the operating temperature range difference significant for substitution?

A: The ATMEGA32-16AU supports -40°C ~ 85°C operation, while ATMEGA32-16AC operates 0°C ~ 70°C. Applications requiring extended low-temperature operation must use ATMEGA32-16AU. Standard industrial temperature range applications (0°C ~ 70°C) are compatible with both devices.

Q: What is the RoHS compliance difference?

A: ATMEGA32-16AC is RoHS non-compliant. ATMEGA32-16AU is ROHS3 compliant. Applications subject to RoHS regulations must use ATMEGA32-16AU.

Q: Are communication interfaces identical?

A: Yes. Both devices provide I2C, SPI, and UART/USART connectivity with identical protocol support and peripheral integration.

Q: Can firmware developed for ATMEGA32-16AC run on ATMEGA32-16AU without modification?

A: Yes. Identical core processor architecture, instruction set, memory organization, and peripheral configuration ensure complete software compatibility.