ATMEGA88A-MUR Equivalent & Substitute Parts

Part Overview

The ATMEGA88A-MUR is an 8-bit AVR microcontroller manufactured by Microchip Technology, designed for embedded applications requiring low-power operation and integrated peripheral functionality. This device features 8KB of Flash program memory, 1KB of RAM, and 512 bytes of EEPROM, operating across a wide voltage range of 1.8V to 5.5V. The part is currently in active production status with 6644 units available in inventory. Substitute parts are identified when equivalent electrical and mechanical parameters align with the main device specifications, enabling direct replacement in circuit designs without functional compromise.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	20MHz
Program Memory Size	8KB (4K x 16)
Program Memory Type	FLASH
RAM Size	1K x 8
EEPROM Size	512 x 8
Voltage Supply Range	1.8V ~ 5.5V
Number of I/O	23
Connectivity	I2C, SPI, UART/USART
Data Converters	A/D 8x10b
Mounting Type	Surface Mount
Package	32-VQFN (5x5)
Operating Temperature	-40°C ~ 85°C

Substitute Part Grouping Explanation

Substitute parts for the ATMEGA88A-MUR are identified based on strict parametric equivalence across core electrical and mechanical specifications. The substitution criteria are limited to the following parameters:

Core processor architecture (AVR)
Core size (8-Bit)
Operating frequency (20MHz)
Program memory capacity and type (8KB FLASH)
RAM and EEPROM capacity (1K x 8 and 512 x 8 respectively)
Voltage supply range (1.8V ~ 5.5V)
I/O count (23 pins)
Connectivity interfaces (I2C, SPI, UART/USART)
Peripheral features (Brown-out Detect/Reset, POR, PWM, WDT)
Data converter specifications (A/D 8x10b)
Package type and dimensions (32-VQFN 5x5)
Operating temperature range (-40°C ~ 85°C)

The ATMEGA88PA-MUR meets all these criteria and is classified as a parametric equivalent. Differences in packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and programmable verification status do not affect functional substitution capability.

Parameter Comparison

Parameter	ATMEGA88A-MUR	ATMEGA88PA-MUR
Manufacturer	Microchip Technology	Microchip Technology
Core Processor	AVR	AVR
Core Size	8-Bit	8-Bit
Speed	20MHz	20MHz
Program Memory	8KB (4K x 16) FLASH	8KB (4K x 16) FLASH
RAM	1K x 8	1K x 8
EEPROM	512 x 8	512 x 8
Voltage Supply	1.8V ~ 5.5V	1.8V ~ 5.5V
Number of I/O	23	23
Connectivity	I2C, SPI, UART/USART	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Data Converters	A/D 8x10b	A/D 8x10b
Oscillator Type	Internal	Internal
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Package	32-VQFN (5x5)	32-VQFN (5x5)
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8542.31.0001	8542.31.0001

Engineering Selection Recommendations

Both the ATMEGA88A-MUR and ATMEGA88PA-MUR are active production devices from Microchip Technology with identical electrical specifications and package configurations. Selection between these parts may be based on the following factors:

Both devices maintain ROHS3 compliance and REACH unaffected status, meeting environmental regulatory requirements.
Both devices carry identical ECCN (EAR99) and HTSUS classifications for export and tariff purposes.
The ATMEGA88PA-MUR is verified as programmable through DiGi-Electronics, whereas the ATMEGA88A-MUR programmable status is not verified.
Packaging format differs: ATMEGA88A-MUR is supplied in Tape & Reel format, while ATMEGA88PA-MUR is available in Cut Tape and Digi-Reel format.
Inventory availability should be evaluated based on project timeline and volume requirements.

Frequently Asked Questions (FAQ)

Q: Can ATMEGA88PA-MUR be used as a direct replacement for ATMEGA88A-MUR in existing designs?

A: Yes. The ATMEGA88PA-MUR is electrically and mechanically equivalent to the ATMEGA88A-MUR across all specified parameters. No circuit modifications are required for substitution.

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

A: No. Both devices use the 32-VQFN (5x5) package with identical pin assignments and I/O functionality.

Q: What is the significance of the packaging format difference?

A: Packaging format (Tape & Reel versus Cut Tape & Digi-Reel) affects supply chain logistics and handling procedures but does not impact electrical performance or circuit compatibility.

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

A: Yes. Both the ATMEGA88A-MUR and ATMEGA88PA-MUR operate across the identical voltage supply range of 1.8V to 5.5V.

Q: Are there temperature rating differences?

A: No. Both devices maintain the same operating temperature range of -40°C to 85°C.

Q: What does the "PA" designation in ATMEGA88PA-MUR indicate?

A: The "PA" suffix indicates a variant within the ATmega88 product line. Functionally, the ATMEGA88PA-MUR maintains parametric equivalence with the ATMEGA88A-MUR for all specified electrical and mechanical characteristics.

Q: Can these parts be used interchangeably in high-volume production?

A: Yes, provided that supply chain and packaging format requirements are compatible with production processes. Both parts are active production devices with established availability.

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