ATMEGA48-20PI Equivalent & Substitute Parts

Part Overview

The ATMEGA48-20PI is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 4KB of FLASH program 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 includes integrated peripherals such as I2C, SPI, UART/USART connectivity, PWM, watchdog timer, and brown-out detection. The ATMEGA48-20PI is packaged in a 28-pin DIP (0.300", 7.62mm) through-hole configuration with 23 I/O pins and 6-channel 10-bit analog-to-digital conversion capability.

The ATMEGA48-20PI carries an Obsolete product status. Equivalent and substitute parts are necessary for ongoing design support, production continuity, and component sourcing flexibility.

Substiute Parts

ATMEGA48-20PI

Microchip TechnologyIn Stock: 1093ATMEGA48-20PI Datasheet

Current PartRFQ

ATMEGA48-20PU

Microchip TechnologyIn Stock: 1685ATMEGA48-20PU Datasheet

DirectRFQ

ATMEGA48P-20PU

Microchip TechnologyIn Stock: 2459ATMEGA48P-20PU Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATMEGA48-20PI is determined by strict equivalence across the following critical parameters:

• Core Processor Architecture: AVR
• Core Size: 8-Bit
• Operating Speed: 20MHz
• Program Memory: 4KB FLASH (2K x 16)
• RAM: 512 x 8 bytes
• EEPROM: 256 x 8 bytes
• Supply Voltage Range: 2.7V ~ 5.5V
• I/O Count: 23 pins
• Connectivity Interfaces: I2C, SPI, UART/USART
• Peripheral Set: Brown-out Detect/Reset, POR, PWM, WDT
• A/D Converters: 6-channel 10-bit
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package: 28-DIP (0.300", 7.62mm)

Two substitute parts meet these criteria with identical electrical and mechanical specifications:

1. ATMEGA48-20PU (Direct Manufacturer Equivalent) – Differs only in packaging format (Tube vs. unspecified) and product status (Active vs. Obsolete)
2. ATMEGA48P-20PU (Parametric Equivalent) – Identical electrical and mechanical parameters; differs in product status (Obsolete vs. Obsolete) and packaging format (Tube)

Parameter Comparison

Engineering Selection Recommendations

ATMEGA48-20PU is the primary substitute for ATMEGA48-20PI. This part maintains identical electrical and mechanical specifications while offering Active product status and ROHS3 compliance. Increased inventory availability (1662 units) supports production continuity.

ATMEGA48P-20PU serves as a secondary parametric equivalent. All electrical and mechanical parameters are identical to ATMEGA48-20PI. This part carries ROHS3 compliance and the highest inventory availability (2400 units), though it retains Obsolete product status.

Selection between ATMEGA48-20PU and ATMEGA48P-20PU depends on supply chain requirements and compliance mandates. ATMEGA48-20PU is preferred for new designs and ongoing production due to Active status. ATMEGA48P-20PU is suitable for legacy system support where component sourcing is the primary constraint.

Frequently Asked Questions (FAQ)

Q: Can ATMEGA48-20PU directly replace ATMEGA48-20PI in existing designs?

A: Yes. ATMEGA48-20PU is electrically and mechanically identical to ATMEGA48-20PI. Both devices share the same core processor (AVR), operating speed (20MHz), memory configuration (4KB FLASH, 512 bytes RAM, 256 bytes EEPROM), I/O count (23 pins), peripheral set, and 28-DIP package. The primary difference is product status: ATMEGA48-20PU is Active while ATMEGA48-20PI is Obsolete.

Q: What is the difference between ATMEGA48-20PU and ATMEGA48P-20PU?

A: Both parts are parametrically equivalent with identical electrical specifications and 28-DIP packaging. The designation difference (ATMEGA48 vs. ATMEGA48P) reflects internal silicon revisions, but functional parameters remain unchanged. ATMEGA48-20PU carries Active product status, while ATMEGA48P-20PU is Obsolete. Both are ROHS3 compliant.

Q: Are there any compliance differences between these parts?

A: ATMEGA48-20PI is RoHS non-compliant. Both ATMEGA48-20PU and ATMEGA48P-20PU are ROHS3 compliant. All three parts are REACH Unaffected and carry EAR99 ECCN classification.

Q: Does packaging format affect substitution?

A: Packaging format (Tube vs. unspecified for ATMEGA48-20PI) does not affect electrical or mechanical compatibility. The 28-DIP (0.300", 7.62mm) package and through-hole mounting type are identical across all three parts. Packaging format affects only logistics and handling.

Q: Which substitute should be selected for new production?

A: ATMEGA48-20PU is the recommended choice for new production due to Active product status and ROHS3 compliance. This part ensures long-term supply availability and regulatory compliance for modern manufacturing environments.