ATMEGA48-20AI Equivalent & Substitute Parts

Part Overview

The ATMEGA48-20AI is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 4KB Flash memory, 512 bytes of RAM, and 256 bytes of EEPROM. This device operates at 20MHz with a supply voltage range of 2.7V to 5.5V and is housed in a 32-TQFP package. The ATMEGA48-20AI is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity.

Substiute Parts

ATMEGA48-20AI

Microchip TechnologyIn Stock: 2119ATMEGA48-20AI Datasheet

Current PartRFQ

ATMEGA48-20AU

Microchip TechnologyIn Stock: 2940ATMEGA48-20AU Datasheet

DirectRFQ

ATMEGA48P-20AU

Microchip TechnologyIn Stock: 1894ATMEGA48P-20AU Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATMEGA48-20AI is determined by strict equivalence across the following critical parameters: core processor architecture (AVR), core size (8-Bit), operating frequency (20MHz), program memory capacity (4KB Flash), RAM and EEPROM sizes (512 x 8 and 256 x 8 respectively), supply voltage range (2.7V ~ 5.5V), peripheral feature set (I2C, SPI, UART/USART, Brown-out Detect/Reset, POR, PWM, WDT), I/O count (23), data converter specifications (A/D 8x10b), operating temperature range (-40°C ~ 85°C), and physical package format (32-TQFP 7x7 surface mount).

The substitute parts identified maintain identical electrical and functional specifications while differing in product status and compliance certifications. ATMEGA48-20AU serves as a direct manufacturer equivalent with active product status. ATMEGA48P-20AU provides parametric equivalence with enhanced voltage specifications and active availability.

Parameter Comparison

Engineering Selection Recommendations

ATMEGA48-20AU is the primary substitute for ATMEGA48-20AI, offering identical electrical and functional specifications with active product status and ROHS3 compliance. This part is suitable for direct replacement in new designs and production continuity applications.

ATMEGA48P-20AU provides parametric equivalence with active availability and ROHS3 compliance. Both substitute parts maintain full compatibility with existing designs based on the ATMEGA48-20AI.

Selection between ATMEGA48-20AU and ATMEGA48P-20AU should be based on supply chain availability and compliance requirements specific to the application. Both parts satisfy the electrical and functional requirements of the original ATMEGA48-20AI.

Frequently Asked Questions (FAQ)

Q: Can ATMEGA48-20AU directly replace ATMEGA48-20AI in existing designs? A: Yes. ATMEGA48-20AU maintains identical core processor architecture, memory configuration, operating frequency, supply voltage range, peripheral feature set, I/O count, and package format. No design modifications are required.

Q: What is the difference between ATMEGA48-20AU and ATMEGA48P-20AU? A: Both parts are parametrically equivalent with identical electrical specifications and package format. The primary differences are product status (both active), RoHS compliance (both ROHS3 compliant), and supply chain availability. Selection should be based on inventory and delivery requirements.

Q: Why is the ATMEGA48-20AI classified as obsolete? A: The ATMEGA48-20AI has reached end-of-life status. ATMEGA48-20AU and ATMEGA48P-20AU are the active production equivalents from Microchip Technology.

Q: Are there any package or pinout differences between these parts? A: No. All three parts use the 32-TQFP (7x7) surface mount package with identical pinout and mechanical dimensions.

Q: What compliance certifications apply to the substitute parts? A: ATMEGA48-20AU and ATMEGA48P-20AU are both ROHS3 compliant and REACH unaffected. Both carry EAR99 export classification.