ATMEGA323-8PI Equivalent & Substitute Parts

Part Overview

The ATMEGA323-8PI 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, internal oscillator, and communication interfaces including I2C, SPI, and UART/USART. The ATMEGA323-8PI is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity.

Substiute Parts

ATMEGA323-8PI

Microchip TechnologyIn Stock: 707ATMEGA323-8PI Datasheet

Current PartRFQ

ATMEGA32L-8PU

AtmelIn Stock: 5000199ATMEGA32L-8PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATMEGA323-8PI is based on strict equivalence of core functional parameters. The substitute part must maintain identical specifications across the following critical criteria:

• Core processor architecture (AVR)
• Core size (8-Bit)
• Operating frequency (8MHz)
• Memory configuration (32KB FLASH, 2KB RAM, 1KB EEPROM)
• I/O pin count (32)
• Peripheral feature set (I2C, SPI, UART/USART, Brown-out Detect/Reset, POR, PWM, WDT)
• Data converter specifications (A/D 8x10b)
• Package type and pin configuration (40-DIP)
• Operating temperature range (-40°C ~ 85°C)

The ATMEGA32L-8PU qualifies as a direct substitute based on these parameters. While the supply voltage range differs (2.7V ~ 5.5V versus 4.5V ~ 5.5V), the ATMEGA32L-8PU encompasses the original operating range and extends compatibility to lower voltage applications. Product status transition from obsolete to active ensures continued availability and manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The ATMEGA32L-8PU is the qualified substitute for the ATMEGA323-8PI based on functional equivalence and product availability. The transition from obsolete to active status ensures manufacturing continuity and supply chain reliability. The extended supply voltage range (2.7V ~ 5.5V) of the ATMEGA32L-8PU provides additional design flexibility while maintaining full compatibility with applications designed for the original 4.5V ~ 5.5V specification. Both devices share identical pinout, memory architecture, peripheral configuration, and operating temperature specifications, enabling direct replacement in existing PCB designs without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the ATMEGA32L-8PU replace the ATMEGA323-8PI in existing designs?

A: Yes. The ATMEGA32L-8PU provides functional equivalence across all specified parameters including memory configuration, I/O count, peripheral features, and package type. Direct PCB substitution is possible without design changes.

Q: What is the difference in supply voltage specifications?

A: The ATMEGA323-8PI operates at 4.5V ~ 5.5V, while the ATMEGA32L-8PU operates at 2.7V ~ 5.5V. The substitute part encompasses the original voltage range and extends compatibility to lower voltage applications. Designs operating within the 4.5V ~ 5.5V window remain fully compatible.

Q: Are the pin configurations identical?

A: Yes. Both devices use the 40-DIP package with identical pinout and pin assignments. No PCB layout modifications are required for substitution.

Q: Why is the ATMEGA323-8PI classified as obsolete?

A: Product obsolescence reflects manufacturing discontinuation by the original supplier. The ATMEGA32L-8PU represents the active equivalent within the AVR ATmega product line, ensuring continued availability for new production and design implementations.

Q: Are there any compliance or certification differences?

A: Both devices share identical ECCN (EAR99) and HTSUS (8542.31.0001) classifications. Compliance status remains consistent for export and regulatory purposes.