C8051F301 Equivalent & Substitute Parts

Part Overview

The C8051F301 is an 8-bit microcontroller from Silicon Labs' C8051F30x series, featuring an 8051 core processor operating at 25MHz with 8KB FLASH program memory and 256 bytes of RAM. The device integrates SMBus (2-Wire/I2C) and UART/USART connectivity, along with peripherals including Power-On Reset (POR), Pulse Width Modulation (PWM), and Watchdog Timer (WDT). Housed in an 11-QFN (3x3) surface mount package, this microcontroller is classified as obsolete. Due to its discontinued status, identifying functionally equivalent substitute parts is essential for ongoing system support and new design considerations.

Substiute Parts

C8051F301

Silicon LabsIn Stock: 3788C8051F301 Datasheet

Current PartRFQ

C8051F301-GM

Silicon LabsIn Stock: 2493C8051F301-GM Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the C8051F301 are identified based on strict electrical and mechanical parameter matching. The primary substitution criterion is functional equivalence across core architecture, memory configuration, operating voltage, connectivity interfaces, and package form factor. The C8051F301-GM variant maintains identical electrical specifications including 8051 core processor, 25MHz clock speed, 8KB FLASH memory, 256 bytes RAM, 2.7V to 3.6V supply voltage range, SMBus/I2C and UART/USART connectivity, and 11-QFN (3x3) surface mount packaging. Substitution is valid when all these parameters remain constant across the part variants.

Parameter Comparison

Engineering Selection Recommendations

The C8051F301-GM serves as a direct functional substitute for the C8051F301, with all electrical and mechanical parameters held constant. The primary distinction between these variants lies in regulatory compliance and product lifecycle status. The C8051F301-GM achieves ROHS3 compliance, whereas the original C8051F301 is RoHS non-compliant. The C8051F301-GM is designated "Not For New Designs," indicating it remains available for legacy system support but is not recommended for new product development. For applications requiring ongoing component availability with improved environmental compliance, the C8051F301-GM is the appropriate selection. Both variants maintain identical core functionality, memory architecture, and interface specifications, ensuring direct substitution at the circuit level.

Frequently Asked Questions (FAQ)

Q: Can C8051F301-GM replace C8051F301 in existing designs? A: Yes. The C8051F301-GM maintains identical electrical specifications, memory configuration, operating voltage range, connectivity interfaces, and 11-QFN (3x3) package form factor. Direct substitution is functionally valid.

Q: What is the difference between C8051F301 and C8051F301-GM? A: The variants are electrically and mechanically identical. The C8051F301-GM offers ROHS3 compliance, whereas the C8051F301 is RoHS non-compliant. The C8051F301-GM carries a "Not For New Designs" status, indicating legacy support availability.

Q: Are there packaging differences between these parts? A: No. Both parts use the 11-QFN (3x3) surface mount package with identical pin configuration and mechanical dimensions.

Q: What connectivity options are available on these microcontrollers? A: Both variants integrate SMBus (2-Wire/I2C) and UART/USART serial communication interfaces, supporting standard embedded system communication protocols.

Q: What is the operating voltage range for these devices? A: Both C8051F301 and C8051F301-GM operate within a 2.7V to 3.6V supply voltage range, suitable for low-power embedded applications.

Q: Are these parts suitable for new product designs? A: The C8051F301 is classified as obsolete. The C8051F301-GM is designated "Not For New Designs." For new development, alternative current-generation microcontrollers should be evaluated.