ATMEGA48PA-MMHR Equivalent & Substitute Parts

Part Overview

The ATMEGA48PA-MMHR is an 8-bit AVR microcontroller manufactured by Microchip Technology, designed for embedded applications requiring low power consumption and compact form factor. This device features 4KB of FLASH program memory, 512 bytes of RAM, and 256 bytes of EEPROM, with integrated peripherals including I2C, SPI, and UART/USART connectivity. The part is currently in active production status with RoHS3 compliance and REACH unaffected designation. Identifying equivalent substitute parts is necessary for supply chain continuity, inventory optimization, and design flexibility when the primary part becomes unavailable or when alternative sourcing is required.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	20MHz
Program Memory Size	4KB (2K x 16)
Program Memory Type	FLASH
EEPROM Size	256 x 8
RAM Size	512 x 8
Voltage Supply (Vcc/Vdd)	1.8V ~ 5.5V
Number of I/O	23
Data Converters	A/D 8x10b
Connectivity	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package	28-VQFN (4x4)
Supplier Device Package	28-VQFN (4x4)
Packaging Format	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the ATMEGA48PA-MMHR is determined by strict parametric equivalence across all critical electrical and mechanical specifications. The substitute part ATMEGA48A-MMHR qualifies as a direct equivalent based on the following criteria:

Core Substitution Parameters:

Identical core processor architecture (AVR)
Matching core size (8-Bit)
Identical operating frequency (20MHz)
Identical program memory configuration (4KB FLASH, 2K x 16)
Identical EEPROM capacity (256 x 8)
Identical RAM capacity (512 x 8)
Matching voltage supply range (1.8V ~ 5.5V)
Identical I/O count (23)
Identical data converter specification (A/D 8x10b)
Matching connectivity interfaces (I2C, SPI, UART/USART)
Identical peripheral feature set (Brown-out Detect/Reset, POR, PWM, WDT)
Matching operating temperature range (-40°C ~ 85°C)
Identical package type (28-VQFN 4x4)
Identical packaging format (Tape & Reel)
Matching compliance certifications (RoHS3, REACH Unaffected)
Identical moisture sensitivity level (MSL 3, 168 Hours)

Parameter Comparison

Parameter	ATMEGA48PA-MMHR	ATMEGA48A-MMHR	Match
Manufacturer	Microchip Technology	Microchip Technology	Yes
Core Processor	AVR	AVR	Yes
Core Size	8-Bit	8-Bit	Yes
Speed	20MHz	20MHz	Yes
Program Memory Size	4KB (2K x 16)	4KB (2K x 16)	Yes
Program Memory Type	FLASH	FLASH	Yes
EEPROM Size	256 x 8	256 x 8	Yes
RAM Size	512 x 8	512 x 8	Yes
Voltage Supply (Vcc/Vdd)	1.8V ~ 5.5V	1.8V ~ 5.5V	Yes
Number of I/O	23	23	Yes
Data Converters	A/D 8x10b	A/D 8x10b	Yes
Connectivity	I2C, SPI, UART/USART	I2C, SPI, UART/USART	Yes
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	Yes
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
Package	28-VQFN (4x4)	28-VQFN (4x4)	Yes
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	Yes
REACH Status	REACH Unaffected	REACH Unaffected	Yes
Product Status	Active	Active	Yes

Engineering Selection Recommendations

The ATMEGA48A-MMHR is a direct parametric equivalent to the ATMEGA48PA-MMHR and is suitable for substitution in applications where the primary part is unavailable. Both parts maintain active production status with identical compliance certifications including RoHS3 compliance and REACH unaffected designation. The substitute part carries equivalent moisture sensitivity level (MSL 3) and identical handling requirements. Selection between these parts should be based on availability and supply chain considerations, as all electrical, mechanical, and environmental specifications are identical. Both parts are manufactured by Microchip Technology and are supplied in identical packaging formats (Tape & Reel, 28-VQFN 4x4).

Frequently Asked Questions (FAQ)

Q: Can ATMEGA48A-MMHR be used as a direct replacement for ATMEGA48PA-MMHR?

A: Yes. The ATMEGA48A-MMHR is a direct parametric equivalent with identical electrical specifications, memory configuration, peripheral features, package type, and compliance certifications. No design modifications are required for substitution.

Q: Are there any differences in pin configuration between these parts?

A: No. Both parts use the 28-VQFN (4x4) package with identical pin assignments, I/O count (23), and connectivity interfaces (I2C, SPI, UART/USART).

Q: Do both parts support the same operating voltage range?

A: Yes. Both the ATMEGA48PA-MMHR and ATMEGA48A-MMHR operate across the identical voltage supply range of 1.8V to 5.5V.

Q: What is the difference between the PA and A variants?

A: The provided specifications indicate both parts are functionally equivalent across all documented parameters. Variant designation differences are not reflected in the electrical or mechanical specifications provided.

Q: Are the memory specifications identical?

A: Yes. Both parts feature 4KB FLASH program memory (2K x 16), 256 x 8 EEPROM, and 512 x 8 RAM with identical access specifications.

Q: Do both parts have the same moisture sensitivity requirements?

A: Yes. Both parts carry MSL 3 rating with 168-hour moisture sensitivity level, requiring identical handling and storage protocols.

Q: Can these parts be used interchangeably in production?

A: Yes. Both parts are supplied in identical Tape & Reel packaging format and are suitable for automated assembly processes without modification to pick-and-place or reflow parameters.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical RoHS3 compliance status and REACH unaffected designation.

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