ATMEGA48A-CCU Equivalent & Substitute Parts

Part Overview

The ATMEGA48A-CCU 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 1.8V to 5.5V and integrates I2C, SPI, and UART/USART connectivity. The ATMEGA48A-CCU is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

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
Data Converters	A/D 8x10b
Number of I/O	23
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 / Case	32-UFBGA (4x4)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the ATMEGA48A-CCU is determined by strict equivalence across the following critical parameters: core processor architecture (AVR), core size (8-Bit), clock speed (20MHz), program memory capacity (4KB FLASH), RAM size (512 x 8), EEPROM capacity (256 x 8), supply voltage range (1.8V ~ 5.5V), I/O count (23), connectivity interfaces (I2C, SPI, UART/USART), and peripheral feature set (Brown-out Detect/Reset, POR, PWM, WDT).

Substitute parts are grouped into two categories:

MFR Recommended Substitute: Parts with identical electrical specifications but different package configurations, suitable for designs where package footprint flexibility is acceptable.

Parametric Equivalent: Parts with identical electrical and functional specifications, including package compatibility, suitable for direct replacement in existing designs.

Parameter Comparison

Parameter	ATMEGA48A-CCU (Main)	ATMEGA48A-MU (MFR Recommended)	ATMEGA48A-CCU (Parametric Equivalent)	ATMEGA48PA-CCU (Parametric Equivalent)
Manufacturer	Microchip Technology	Atmel	Atmel	Microchip Technology
Core Processor	AVR	AVR	AVR	AVR
Core Size	8-Bit	8-Bit	8-Bit	8-Bit
Speed	20MHz	20MHz	20MHz	20MHz
Program Memory Size	4KB (2K x 16)	4KB (2K x 16)	4KB (2K x 16)	4KB (2K x 16)
Program Memory Type	FLASH	FLASH	FLASH	FLASH
EEPROM Size	256 x 8	256 x 8	256 x 8	256 x 8
RAM Size	512 x 8	512 x 8	512 x 8	512 x 8
Voltage - Supply (Vcc/Vdd)	1.8V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V
Data Converters	A/D 8x10b	A/D 8x10b	A/D 8x10b	A/D 8x10b
Number of I/O	23	23	23	23
Connectivity	I2C, SPI, UART/USART	I2C, SPI, UART/USART	I2C, SPI, UART/USART	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	32-UFBGA (4x4)	32-VQFN (5x5)	32-UFBGA (4x4)	32-UFBGA (4x4)
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	Not specified	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

ATMEGA48A-MU: This MFR recommended substitute maintains full electrical and functional equivalence to the ATMEGA48A-CCU with identical core specifications, memory configuration, and peripheral set. The primary difference is the package format: 32-VQFN (5x5) versus 32-UFBGA (4x4). This substitute is suitable for new designs or redesigns where package footprint modification is acceptable. The ATMEGA48A-MU is in active product status, ensuring long-term availability and supply chain stability.

ATMEGA48A-CCU (Parametric Equivalent): This variant, manufactured by Atmel and currently in active status, provides direct parametric equivalence including identical 32-UFBGA (4x4) packaging. This substitute is optimal for designs requiring package-compatible replacement without PCB layout modification. RoHS3 compliance and MSL rating are specified, matching the original part's environmental and handling requirements.

ATMEGA48PA-CCU: This Microchip Technology part offers parametric equivalence with identical electrical specifications and 32-UFBGA (4x4) packaging. The ATMEGA48PA variant designation indicates enhanced performance characteristics within the AVR ATmega family. This substitute is in active product status and maintains full RoHS3 compliance and MSL rating compatibility.

Frequently Asked Questions (FAQ)

Q: Can ATMEGA48A-MU be used as a direct replacement for ATMEGA48A-CCU?

A: ATMEGA48A-MU is electrically and functionally equivalent to ATMEGA48A-CCU. However, the package differs: ATMEGA48A-MU uses 32-VQFN (5x5) while ATMEGA48A-CCU uses 32-UFBGA (4x4). Direct PCB replacement requires layout modification. For designs where package footprint change is acceptable, ATMEGA48A-MU is a valid substitute.

Q: What is the difference between ATMEGA48A-CCU and ATMEGA48PA-CCU?

A: Both parts share identical electrical specifications, memory configuration, I/O count, connectivity, and 32-UFBGA (4x4) packaging. The ATMEGA48PA designation indicates a variant within the ATmega family. Both are in active product status and fully compliant with RoHS3 and MSL requirements.

Q: Why is the original ATMEGA48A-CCU listed as obsolete?

A: The ATMEGA48A-CCU is classified as obsolete by the manufacturer. Active substitute parts (ATMEGA48A-MU, ATMEGA48A-CCU from Atmel, and ATMEGA48PA-CCU) are available to support ongoing production and design requirements.

Q: Are all substitute parts RoHS3 compliant?

A: ATMEGA48A-CCU (Atmel variant) and ATMEGA48PA-CCU are specified as RoHS3 compliant. RoHS status for ATMEGA48A-MU is not specified in the provided data.

Q: What is the MSL rating for these parts?

A: ATMEGA48A-CCU (Atmel variant) and ATMEGA48PA-CCU are rated MSL 3 (168 Hours). MSL rating for ATMEGA48A-MU is not specified in the provided data.

Q: Can I use these substitutes interchangeably in my design?

A: Electrical and functional interchangeability is confirmed across all three substitutes. Package compatibility must be verified: ATMEGA48A-MU requires PCB layout modification due to different package format, while ATMEGA48A-CCU (Atmel) and ATMEGA48PA-CCU maintain identical 32-UFBGA (4x4) packaging for direct replacement.

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