AT89C51CC03C-S3RIM Equivalent & Substitute Parts

Part Overview

The AT89C51CC03C-S3RIM is an 80C51-based 8-bit microcontroller manufactured by Microchip Technology, featuring 64KB FLASH program memory, 2.25KB RAM, and integrated CANbus connectivity. This device is packaged in a 52-PLCC (19.15x19.15mm) surface mount configuration and operates across a -40°C to 85°C temperature range with supply voltage from 3V to 5.5V.

The AT89C51CC03C-S3RIM is classified as obsolete. Identifying equivalent substitute parts is necessary to support ongoing system maintenance, design updates, and procurement continuity for applications currently utilizing this microcontroller.

Key Parameters

Parameter	Value
Core Processor	80C51
Core Size	8-Bit
Speed	40MHz
Program Memory Size	64KB (64K x 8)
Program Memory Type	FLASH
EEPROM Size	2K x 8
RAM Size	2.25K x 8
Voltage Supply (Vcc/Vdd)	3V ~ 5.5V
Data Converters	A/D 8x10b
Number of I/O	36
Connectivity	CANbus, SPI, UART/USART
Peripherals	POR, PWM, WDT
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	52-LCC (J-Lead)
Supplier Device Package	52-PLCC (19.15x19.15)
Oscillator Type	External

Substitute Part Grouping Explanation

Substitution of the AT89C51CC03C-S3RIM is determined by strict equivalence across the following critical parameters:

Core processor architecture (80C51)
Core size (8-Bit)
Operating speed (40MHz)
Program memory capacity and type (64KB FLASH)
RAM and EEPROM capacity (2.25K x 8 RAM, 2K x 8 EEPROM)
Supply voltage range (3V ~ 5.5V)
Data converter specifications (A/D 8x10b)
I/O count (36 pins)
Connectivity features (CANbus, UART/USART)
Peripheral set (POR, PWM, WDT)
Operating temperature range (-40°C ~ 85°C)
Mounting type (Surface Mount)

The AT89C51CC03UA-SLSUM meets these substitution criteria with one packaging variation: it uses a 44-PLCC (16.6x16.6mm) package instead of the 52-PLCC format. This represents a pin-count reduction from 52 to 44 pins, which may require PCB layout modifications and pin mapping verification.

Parameter Comparison

Parameter	AT89C51CC03C-S3RIM (Main)	AT89C51CC03UA-SLSUM (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Core Processor	80C51	80C51
Core Size	8-Bit	8-Bit
Speed	40MHz	40MHz
Program Memory Size	64KB (64K x 8)	64KB (64K x 8)
Program Memory Type	FLASH	FLASH
EEPROM Size	2K x 8	2K x 8
RAM Size	2.25K x 8	2.25K x 8
Voltage Supply (Vcc/Vdd)	3V ~ 5.5V	3V ~ 5.5V
Data Converters	A/D 8x10b	A/D 8x10b
Number of I/O	36	36
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Supplier Device Package	52-PLCC (19.15x19.15)	44-PLCC (16.6x16.6)
Package / Case	52-LCC (J-Lead)	44-LCC (J-Lead)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	3A991A2	3A991A2
HTSUS	8542.31.0001	8542.31.0001

Engineering Selection Recommendations

The AT89C51CC03UA-SLSUM is the qualified substitute for the AT89C51CC03C-S3RIM based on the following factors:

Product Status: The AT89C51CC03UA-SLSUM carries Active product status, ensuring ongoing manufacturer support and availability, whereas the main part is Obsolete.

Regulatory Compliance: The substitute part is ROHS3 Compliant, meeting current environmental and regulatory requirements. The main part is RoHS non-compliant.

Packaging Consideration: The substitute uses a 44-PLCC package versus the 52-PLCC package of the main part. This represents a reduction in pin count and physical footprint. PCB layout redesign and pin mapping verification are required for implementation.

Functional Equivalence: All core electrical parameters, memory specifications, connectivity features, and operating conditions are identical between the two parts.

Frequently Asked Questions (FAQ)

Q: Can the AT89C51CC03UA-SLSUM directly replace the AT89C51CC03C-S3RIM without PCB modifications?

A: No. The substitute part uses a 44-PLCC package compared to the 52-PLCC package of the main part. This packaging difference requires PCB layout redesign and pin mapping verification. The 44-pin configuration has fewer I/O connections than the 52-pin version, necessitating circuit board changes.

Q: Are the memory specifications identical between these two parts?

A: Yes. Both parts feature 64KB FLASH program memory, 2.25KB RAM, and 2KB EEPROM. Memory capacity and type are fully equivalent.

Q: What is the significance of the RoHS compliance difference?

A: The AT89C51CC03UA-SLSUM is ROHS3 Compliant, meeting current environmental regulations for hazardous substance restrictions. The main part is RoHS non-compliant. For new designs or systems requiring regulatory compliance, the substitute part is the appropriate selection.

Q: Are the connectivity and peripheral features the same?

A: The main part includes CANbus, SPI, and UART/USART connectivity. The substitute part includes CANbus and UART/USART. The SPI interface is not listed for the substitute. Verify SPI requirement compatibility with your application before selection.

Q: What is the moisture sensitivity level for both parts?

A: Both parts have MSL 3 (168 Hours) rating, indicating identical moisture handling and storage requirements.

Q: Is the operating temperature range the same?

A: Yes. Both parts operate across -40°C to 85°C (TA), providing identical thermal performance specifications.

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