T89C51CC02UA-SITIM Equivalent & Substitute Parts

Part Overview

The T89C51CC02UA-SITIM is an 80C51-based 8-bit microcontroller manufactured by Microchip Technology, featuring 16KB FLASH program memory, 2KB EEPROM, and 512 bytes of RAM. This device integrates CANbus and UART/USART connectivity with a 40MHz operating frequency in a 28-PLCC surface mount package. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Core Processor	80C51
Core Size	8-Bit
Speed	40MHz
Program Memory Size	16KB (16K x 8)
Program Memory Type	FLASH
EEPROM Size	2K x 8
RAM Size	512 x 8
Voltage Supply (Vcc/Vdd)	3V ~ 5.5V
Connectivity	CANbus, UART/USART
Peripherals	POR, PWM, WDT
Number of I/O	20
Data Converters	A/D 8x10b
Oscillator Type	External
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	28-LCC (J-Lead)
Supplier Device Package	28-PLCC (11.51x11.51)

Substitute Part Grouping Explanation

Substitute parts for the T89C51CC02UA-SITIM are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Core Substitution Parameters:

Identical core processor architecture (80C51)
Matching core size (8-Bit)
Identical operating frequency (40MHz)
Identical program memory configuration (16KB FLASH)
Identical EEPROM capacity (2K x 8)
Identical RAM capacity (512 x 8)
Matching voltage supply range (3V ~ 5.5V)
Identical connectivity interfaces (CANbus, UART/USART)
Identical peripheral set (POR, PWM, WDT)
Matching I/O count (20)
Identical data converter specification (A/D 8x10b)
Identical package type (28-PLCC, 28-LCC J-Lead)
Matching operating temperature range (-40°C ~ 85°C)

The substitute parts AT89C51CC02CA-SISUM and AT89C51CC02UA-SISUM meet all electrical and mechanical parameters required for direct substitution. Differences exist only in product status, RoHS compliance, and packaging format (Tube vs. unspecified for main part).

Parameter Comparison

Parameter	T89C51CC02UA-SITIM	AT89C51CC02CA-SISUM	AT89C51CC02UA-SISUM
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology
Core Processor	80C51	80C51	80C51
Core Size	8-Bit	8-Bit	8-Bit
Speed	40MHz	40MHz	40MHz
Program Memory Size	16KB (16K x 8)	16KB (16K x 8)	16KB (16K x 8)
Program Memory Type	FLASH	FLASH	FLASH
EEPROM Size	2K x 8	2K x 8	2K x 8
RAM Size	512 x 8	512 x 8	512 x 8
Voltage Supply (Vcc/Vdd)	3V ~ 5.5V	3V ~ 5.5V	3V ~ 5.5V
Connectivity	CANbus, UART/USART	CANbus, UART/USART	CANbus, UART/USART
Peripherals	POR, PWM, WDT	POR, PWM, WDT	POR, PWM, WDT
Number of I/O	20	20	20
Data Converters	A/D 8x10b	A/D 8x10b	A/D 8x10b
Oscillator Type	External	External	External
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	28-LCC (J-Lead)	28-LCC (J-Lead)	28-LCC (J-Lead)
Supplier Device Package	28-PLCC (11.51x11.51)	28-PLCC (11.51x11.51)	28-PLCC (11.51x11.51)
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

Both AT89C51CC02CA-SISUM and AT89C51CC02UA-SISUM are functionally equivalent substitutes for the obsolete T89C51CC02UA-SITIM based on complete electrical and mechanical parameter alignment.

AT89C51CC02CA-SISUM is classified as Active product status with ROHS3 compliance verification. This part carries DiGi-Electronics Programmable verification status.

AT89C51CC02UA-SISUM is classified as Active product status with ROHS3 compliance. This part does not carry DiGi-Electronics Programmable verification status.

Both substitute parts exhibit higher moisture sensitivity levels (MSL 3, 168 Hours) compared to the main part (MSL 2, 1 Year), requiring appropriate handling and storage protocols during component management.

Frequently Asked Questions (FAQ)

Q: Can AT89C51CC02CA-SISUM and AT89C51CC02UA-SISUM be used interchangeably with T89C51CC02UA-SITIM?

A: Yes. Both substitute parts match all electrical and mechanical parameters of the main part, including processor architecture, memory configuration, operating frequency, voltage supply range, connectivity interfaces, peripheral set, I/O count, package type, and operating temperature range.

Q: What are the differences between the substitute parts?

A: AT89C51CC02CA-SISUM carries DiGi-Electronics Programmable verification status, while AT89C51CC02UA-SISUM does not. Both are Active products with ROHS3 compliance. Moisture sensitivity levels are identical between the two substitutes (MSL 3, 168 Hours).

Q: Why is the main part classified as obsolete?

A: The T89C51CC02UA-SITIM is marked as obsolete. The substitute parts AT89C51CC02CA-SISUM and AT89C51CC02UA-SISUM are Active products, ensuring ongoing availability and support.

Q: Are there package compatibility considerations?

A: Both substitute parts use identical package specifications: 28-PLCC (11.51x11.51) with 28-LCC (J-Lead) case type. Direct PCB footprint compatibility is maintained.

Q: What is the impact of different RoHS compliance status?

A: The main part is RoHS non-compliant, while both substitute parts are ROHS3 compliant. This affects material composition and environmental regulatory compliance for new designs and manufacturing processes.

Q: How do moisture sensitivity levels affect component handling?

A: The main part has MSL 2 (1 Year shelf life), while substitutes have MSL 3 (168 Hours shelf life). Substitutes require more stringent moisture control during storage and require baking before reflow soldering if exposed to ambient humidity for extended periods.

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