C8051F320-GQ Equivalent & Substitute Parts

Part Overview

The C8051F320-GQ is an 8-bit microcontroller from Silicon Labs' C8051F32x series, featuring a 25MHz 8051 core with 16KB FLASH memory and 32-LQFP packaging. This device is classified as Not For New Designs, indicating it has reached end-of-life status. Organizations currently using this microcontroller in production or maintenance applications require equivalent alternatives that maintain functional compatibility while meeting current component availability and compliance standards.

Substiute Parts

C8051F320-GQ

Silicon LabsIn Stock: 2264C8051F320-GQ Datasheet

Current PartRFQ

STM32F103C4T6A

STMicroelectronicsIn Stock: 2827STM32F103C4T6A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the C8051F320-GQ is determined by the following critical parameters:

• Program Memory Capacity: 16KB FLASH minimum requirement
• Voltage Supply Range: 2.7V ~ 3.6V compatibility
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Package Type: Surface mount LQFP configuration
• RoHS Compliance: ROHS3 Compliant status
• Connectivity Interfaces: UART/USART, SPI, I2C/SMBus support
• Peripheral Features: Brown-out Detect/Reset, POR, PWM, Temperature Sensor, WDT

The STM32F103C4T6A meets these substitution criteria through equivalent memory capacity, overlapping voltage supply range, matching operating temperature specifications, and surface mount packaging. Both devices maintain ROHS3 compliance and provide the required peripheral feature set for functional replacement in embedded applications.

Parameter Comparison

Engineering Selection Recommendations

The STM32F103C4T6A serves as an active substitute for the C8051F320-GQ based on the following engineering criteria:

Product Status Alignment: The STM32F103C4T6A maintains Active product status, ensuring long-term availability and continued manufacturer support, whereas the C8051F320-GQ is classified as Not For New Designs.

Compliance Certifications: Both devices maintain ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for electronic component procurement and deployment.

Memory and Voltage Specifications: Equivalent 16KB FLASH program memory and overlapping voltage supply ranges (2V ~ 3.6V for STM32F103C4T6A encompasses the 2.7V ~ 3.6V requirement of C8051F320-GQ) satisfy core functional requirements.

Operating Environment: Matching -40°C ~ 85°C operating temperature ranges ensure thermal compatibility across industrial and commercial applications.

Interface Compatibility: Both devices provide UART/USART, SPI, and I2C connectivity, supporting standard embedded communication protocols. The STM32F103C4T6A offers extended connectivity options including CANbus and IrDA.

Frequently Asked Questions (FAQ)

Q: Can the STM32F103C4T6A directly replace the C8051F320-GQ in existing designs?

A: The STM32F103C4T6A provides functional substitution based on memory capacity, voltage supply range, operating temperature, and connectivity interfaces. However, the architectural difference between 8051 and ARM Cortex-M3 cores requires firmware adaptation and validation. Package differences (32-LQFP versus 48-LQFP) necessitate PCB layout modifications.

Q: What are the key differences between these microcontrollers?

A: The primary differences are processor architecture (8051 versus ARM Cortex-M3), clock speed (25MHz versus 72MHz), RAM capacity (2.25K versus 6K), package pin count (32 versus 48), and data converter specifications (17x10-bit A/D versus 10x12-bit A/D). The STM32F103C4T6A provides enhanced processing capability and expanded I/O capacity.

Q: Are there packaging considerations for substitution?

A: Yes. The C8051F320-GQ uses 32-LQFP (7x7mm) packaging, while the STM32F103C4T6A uses 48-LQFP packaging. This difference requires PCB redesign to accommodate the additional pins and modified footprint. Mechanical and electrical layout validation is necessary before implementation.

Q: Do both devices meet current compliance standards?

A: Both the C8051F320-GQ and STM32F103C4T6A are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The STM32F103C4T6A maintains Active product status, ensuring ongoing compliance updates and manufacturer support.

Q: What connectivity interfaces are common between these parts?

A: Both devices support UART/USART, SPI, and I2C/SMBus interfaces, along with USB connectivity. The STM32F103C4T6A provides additional interfaces including CANbus, IrDA, and LINbus, offering expanded communication options for embedded applications.