C8051F047 Equivalent & Substitute Parts

Part Overview

The C8051F047 is an 8-bit microcontroller from Silicon Labs' C8051F04x series, featuring a 25MHz 8051 core with 32KB FLASH program memory and integrated peripherals including CANbus, SPI, UART/USART, and SMBus connectivity. The device is classified as Obsolete, making substitute parts necessary for ongoing production and maintenance applications. Alternative models within the same series provide equivalent functionality with updated product status and compliance certifications.

Key Parameters

Parameter	Value
Core Processor	8051
Core Size	8-Bit
Speed	25MHz
Program Memory Size	32KB (32K x 8)
Program Memory Type	FLASH
RAM Size	4.25K x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 3.6V
Data Converters	A/D 13x10b
Number of I/O	32
Connectivity	CANbus, EBI/EMI, SMBus (2-Wire/I2C), SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	64-TQFP (10x10)
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the C8051F047 is based on electrical and mechanical parameter equivalence within the C8051F04x series. The substitute part C8051F047-GQ maintains identical core specifications:

Critical Matching Parameters:

8051 core processor architecture
8-bit core size
25MHz operating frequency
32KB FLASH program memory
4.25K x 8 RAM configuration
2.7V ~ 3.6V supply voltage range
13-bit 10-channel A/D converter
32 I/O pins
Complete peripheral set (CANbus, SPI, UART/USART, SMBus, PWM, WDT, temperature sensor, brown-out detection)
64-TQFP (10x10) surface mount package
-40°C ~ 85°C operating temperature range
MSL 3 (168 Hours) moisture sensitivity

The substitute differs only in packaging format (Tray vs. standard packaging) and product status/compliance certifications, with no impact on electrical or functional performance.

Parameter Comparison

Parameter	C8051F047	C8051F047-GQ	Match
Core Processor	8051	8051	✓
Core Size	8-Bit	8-Bit	✓
Speed	25MHz	25MHz	✓
Program Memory Size	32KB (32K x 8)	32KB (32K x 8)	✓
Program Memory Type	FLASH	FLASH	✓
RAM Size	4.25K x 8	4.25K x 8	✓
Voltage Supply (Vcc/Vdd)	2.7V ~ 3.6V	2.7V ~ 3.6V	✓
Data Converters	A/D 13x10b	A/D 13x10b	✓
Number of I/O	32	32	✓
Connectivity	CANbus, EBI/EMI, SMBus (2-Wire/I2C), SPI, UART/USART	CANbus, EBI/EMI, SMBus (2-Wire/I2C), SPI, UART/USART	✓
Peripherals	Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT	Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Package / Case	64-TQFP (10x10)	64-TQFP (10x10)	✓
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	✓
RoHS Status	RoHS non-compliant	RoHS Compliant	Different
Product Status	Obsolete	Not For New Designs	Different

Engineering Selection Recommendations

The C8051F047-GQ serves as a direct electrical and functional substitute for the C8051F047. Selection between these parts should be based on the following criteria:

For Existing Designs (Maintenance/Repair): The C8051F047-GQ provides identical electrical performance and pinout compatibility. Both parts are classified as end-of-life products (Obsolete vs. Not For New Designs), indicating limited long-term availability.

For RoHS Compliance Requirements: The C8051F047-GQ is RoHS Compliant, while the C8051F047 is RoHS non-compliant. Applications subject to RoHS regulations must use the C8051F047-GQ variant.

For New Production: Neither part is recommended for new designs due to product status. Evaluation of current-generation C8051F0xx alternatives from Silicon Labs is advised for new development.

Packaging Consideration: The C8051F047-GQ is supplied in Tray packaging, which may affect procurement and handling procedures compared to standard packaging formats.

Frequently Asked Questions (FAQ)

Q: Can C8051F047-GQ replace C8051F047 in existing circuit designs? A: Yes. The C8051F047-GQ is electrically and functionally identical to the C8051F047. All electrical parameters, pin assignments, memory configurations, and peripheral functions are equivalent. Direct substitution is possible without circuit modification.

Q: What is the difference between C8051F047 and C8051F047-GQ? A: The primary differences are packaging format (Tray for -GQ variant), RoHS compliance status (C8051F047-GQ is RoHS Compliant), and product lifecycle status (Obsolete vs. Not For New Designs). Electrical and functional specifications are identical.

Q: Are there any pin compatibility issues between these parts? A: No. Both parts use the 64-TQFP (10x10) package with identical pinout. Pin-for-pin compatibility is confirmed.

Q: Which part should be selected for RoHS-compliant applications? A: The C8051F047-GQ is RoHS Compliant and must be used for applications requiring RoHS compliance. The C8051F047 is RoHS non-compliant.

Q: What is the MSL rating for both parts? A: Both the C8051F047 and C8051F047-GQ have an MSL rating of 3 (168 Hours), indicating identical moisture sensitivity and storage requirements.

Q: Are both parts suitable for new product development? A: No. Both parts carry end-of-life designations (Obsolete or Not For New Designs). New designs should evaluate current-generation alternatives from Silicon Labs' microcontroller portfolio.

Q: What is the operating temperature range for these microcontrollers? A: Both parts operate across -40°C to 85°C (TA), suitable for industrial and extended temperature applications.

Q: Can these parts be used interchangeably in production? A: Yes, for existing designs. However, due to end-of-life status, long-term availability of either variant is limited. Inventory planning should account for potential supply constraints.

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