AT89C51CC03C-SLRIM Equivalent & Substitute Parts

Part Overview

The AT89C51CC03C-SLRIM 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 operates at 40MHz with a supply voltage range of 3V to 5.5V and is housed in a 44-PLCC surface mount package.

The AT89C51CC03C-SLRIM carries an obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements 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
Connectivity	CANbus, UART/USART
Peripherals	POR, PWM, WDT
Number of I/O	36
Data Converters	A/D 8x10b
Oscillator Type	External
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	44-LCC (J-Lead)
Supplier Device Package	44-PLCC (16.6x16.6)

Substitute Part Grouping Explanation

Substitution eligibility for the AT89C51CC03C-SLRIM is determined by strict parametric equivalence across the following critical criteria:

Core Architecture & Processing: Identical 80C51 core processor and 8-bit core size ensure instruction set compatibility and software portability.

Memory Configuration: Matching 64KB FLASH program memory, 2K x 8 EEPROM, and 2.25K x 8 RAM ensure code and data storage capacity equivalence.

Electrical Specifications: Identical 3V to 5.5V supply voltage range and 40MHz operating speed maintain timing and power delivery compatibility.

Connectivity & Peripherals: Matching CANbus and UART/USART connectivity, along with identical POR, PWM, and WDT peripherals, ensure functional feature parity.

I/O & Data Conversion: 36 I/O pins and 8x10-bit A/D converters provide identical signal processing and interface capabilities.

Package & Mounting: 44-PLCC (16.6x16.6) surface mount package ensures mechanical and electrical PCB compatibility.

Operating Environment: Identical -40°C to 85°C temperature range supports equivalent thermal performance.

Parameter Comparison

Parameter	AT89C51CC03C-SLRIM (Main)	AT89C51CC03CA-SLRUM (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
Connectivity	CANbus, UART/USART	CANbus, UART/USART
Peripherals	POR, PWM, WDT	POR, PWM, WDT
Number of I/O	36	36
Data Converters	A/D 8x10b	A/D 8x10b
Oscillator Type	External	External
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	44-LCC (J-Lead)	44-LCC (J-Lead)
Supplier Device Package	44-PLCC (16.6x16.6)	44-PLCC (16.6x16.6)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The AT89C51CC03CA-SLRUM is a direct parametric equivalent to the AT89C51CC03C-SLRIM. Both devices share identical core architecture, memory configuration, electrical specifications, connectivity features, and package geometry.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The AT89C51CC03C-SLRIM is classified as obsolete, while the AT89C51CC03CA-SLRUM maintains active product status with current manufacturing support. The substitute part achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. Both parts maintain REACH Unaffected status.

For new designs or production continuity requiring this microcontroller class, the AT89C51CC03CA-SLRUM is the appropriate selection due to active availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Are the AT89C51CC03C-SLRIM and AT89C51CC03CA-SLRUM pin-compatible?

A: Yes. Both devices use the 44-PLCC (16.6x16.6) surface mount package with identical pinout, I/O configuration (36 pins), and electrical characteristics. Direct PCB substitution is supported without layout modification.

Q: Can firmware developed for the AT89C51CC03C-SLRIM run on the AT89C51CC03CA-SLRUM?

A: Yes. Both microcontrollers implement the identical 80C51 core processor architecture with matching instruction sets. Firmware compatibility is maintained across memory, peripheral, and connectivity specifications.

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

A: The AT89C51CC03CA-SLRUM achieves ROHS3 compliance, meeting current environmental and material restriction standards. The AT89C51CC03C-SLRIM does not meet these requirements. For applications subject to RoHS regulations or customer specifications, the substitute part is required.

Q: Are there supply chain differences between these parts?

A: The AT89C51CC03C-SLRIM is obsolete with limited availability. The AT89C51CC03CA-SLRUM maintains active production status with established supply channels and current inventory levels.

Q: Do these parts require different power supply designs?

A: No. Both devices operate within the identical 3V to 5.5V supply voltage range and share equivalent power delivery requirements. Existing power supply designs require no modification.

Q: Are the oscillator requirements identical?

A: Yes. Both parts require external oscillator configuration. No changes to clock circuit design are necessary when substituting between these devices.

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