C8051F352R Equivalent & Substitute Parts

Part Overview

The C8051F352R is an 8-bit microcontroller from Silicon Labs' C8051F35x series, featuring a 50MHz 8051 core with 8KB Flash memory and integrated peripherals including SMBus, SPI, and UART connectivity. The device is currently classified as obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement.

Key Parameters

Parameter	Value
Core Processor	8051
Core Size	8-Bit
Speed	50MHz
Program Memory Size	8KB (8K x 8)
Program Memory Type	FLASH
RAM Size	768 x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 3.6V
Data Converters	A/D 8x16b; D/A 2x8b
Connectivity	SMBus (2-Wire/I2C), SPI, UART/USART
Peripherals	POR, PWM, Temp Sensor, WDT
Number of I/O	17
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	32-LQFP (7x7)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the C8051F352R is determined by strict equivalence across the following critical parameters:

Core Architecture: 8051 processor family
Memory Configuration: 8KB Flash, 768 x 8 RAM
Clock Speed: 50MHz operation
Supply Voltage: 2.7V ~ 3.6V range
Peripheral Set: SMBus, SPI, UART/USART, POR, PWM, Temp Sensor, WDT
I/O Count: 17 pins
Package: 32-LQFP (7x7) form factor
Operating Temperature: -40°C ~ 85°C

The C8051F352-GQ meets all electrical and mechanical substitution criteria, differing only in packaging format (Tray vs. standard) and compliance certifications.

Parameter Comparison

Parameter	C8051F352R	C8051F352-GQ	Match
Core Processor	8051	8051	✓
Core Size	8-Bit	8-Bit	✓
Speed	50MHz	50MHz	✓
Program Memory Size	8KB (8K x 8)	8KB (8K x 8)	✓
Program Memory Type	FLASH	FLASH	✓
RAM Size	768 x 8	768 x 8	✓
Voltage Supply (Vcc/Vdd)	2.7V ~ 3.6V	2.7V ~ 3.6V	✓
Data Converters	A/D 8x16b; D/A 2x8b	A/D 8x16b; D/A 2x8b	✓
Connectivity	SMBus (2-Wire/I2C), SPI, UART/USART	SMBus (2-Wire/I2C), SPI, UART/USART	✓
Peripherals	POR, PWM, Temp Sensor, WDT	POR, PWM, Temp Sensor, WDT	✓
Number of I/O	17	17	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
Package / Case	32-LQFP (7x7)	32-LQFP (7x7)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	✓
Product Status	Obsolete	Active	—
RoHS Status	RoHS non-compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

The C8051F352-GQ is a direct functional equivalent to the C8051F352R with identical electrical specifications and pinout. Selection between these parts should be based on the following factors:

Product Status: The C8051F352R is obsolete, while the C8051F352-GQ maintains active product status with verified programmability. For new designs or long-term supply requirements, the C8051F352-GQ is the appropriate choice.

Compliance Certifications: The C8051F352-GQ meets ROHS3 compliance and REACH unaffected status, whereas the C8051F352R is RoHS non-compliant. Applications subject to environmental or regulatory requirements should specify the C8051F352-GQ.

Packaging and Availability: Both devices are available in 32-LQFP (7x7) surface mount packages. The C8051F352-GQ is supplied in Tray packaging with higher inventory availability (1350 Pcs vs. 887 Pcs).

Frequently Asked Questions (FAQ)

Q: Can the C8051F352-GQ replace the C8051F352R in existing designs?

A: Yes. The C8051F352-GQ is electrically and mechanically identical to the C8051F352R across all functional parameters, including core architecture, memory configuration, clock speed, supply voltage, peripheral set, I/O count, and package form factor. No design modifications are required.

Q: What is the difference between C8051F352R and C8051F352-GQ?

A: The primary differences are product status (Obsolete vs. Active), compliance certifications (RoHS non-compliant vs. ROHS3 Compliant), packaging format (standard vs. Tray), and inventory availability. Electrical and mechanical specifications are identical.

Q: Are there any pin compatibility concerns?

A: No. Both devices use the 32-LQFP (7x7) package with 17 I/O pins and identical pinout. PCB layouts and socket designs are fully compatible.

Q: Which part should be specified for new production?

A: The C8051F352-GQ should be specified for new designs and production runs due to its active product status, ROHS3 compliance, and verified programmability.

Q: Is the moisture sensitivity level the same for both parts?

A: Yes. Both the C8051F352R and C8051F352-GQ have MSL 3 (168 Hours) rating, requiring identical handling and storage protocols.

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