C8051F350 Equivalent & Substitute Parts

Part Overview

The C8051F350 is an 8-bit microcontroller from Silicon Labs' C8051F35x series, featuring a 50MHz 8051 core with 8KB Flash program memory and integrated peripherals including SMBus, SPI, and UART connectivity. The main part number (C8051F350) is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The C8051F350-GQ provides a direct functional equivalent with improved compliance status and active product availability.

Substiute Parts

C8051F350

Silicon LabsIn Stock: 1000209C8051F350 Datasheet

Current PartRFQ

C8051F350-GQ

Silicon LabsIn Stock: 1481C8051F350-GQ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The C8051F350-GQ qualifies as a direct substitute based on identical electrical and mechanical parameters across all critical specifications. Substitution is valid when the following parameters match:

• Core processor architecture (8051)
• Core size (8-Bit)
• Operating frequency (50MHz)
• Program memory capacity and type (8KB FLASH)
• RAM capacity (768 x 8)
• Supply voltage range (2.7V ~ 3.6V)
• Data converter specifications (A/D 8x24b; D/A 2x8b)
• I/O count (17)
• Connectivity interfaces (SMBus, SPI, UART/USART)
• Peripheral set (POR, PWM, Temp Sensor, WDT)
• Operating temperature range (-40°C ~ 85°C)
• Package type and dimensions (32-LQFP 7x7)

The C8051F350-GQ maintains complete functional equivalence with identical pinout and electrical characteristics, differing only in packaging format (Tray vs. standard) and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The C8051F350-GQ is the appropriate selection for new designs and production applications. While the original C8051F350 is classified as obsolete, the C8051F350-GQ maintains complete electrical and mechanical compatibility with identical core specifications, memory configuration, and peripheral set.

The C8051F350-GQ offers improved compliance status: it is ROHS3 compliant and REACH unaffected, compared to the non-compliant status of the original part. The substitute part is actively produced and stocked, ensuring supply chain continuity. Both parts share identical pinout and functional characteristics, enabling direct substitution without circuit redesign or firmware modification.

Frequently Asked Questions (FAQ)

Q: Can C8051F350-GQ replace C8051F350 in existing designs?

A: Yes. The C8051F350-GQ is a direct functional equivalent with identical electrical specifications, memory configuration, I/O count, peripheral set, and 32-LQFP package dimensions. No circuit modifications are required.

Q: What is the difference between C8051F350 and C8051F350-GQ?

A: The primary differences are product status and compliance certifications. C8051F350 is obsolete and RoHS non-compliant, while C8051F350-GQ is actively produced, ROHS3 compliant, and REACH unaffected. The packaging format differs (standard vs. Tray), but electrical and mechanical specifications are identical.

Q: Are there any pinout differences between these parts?

A: No. Both parts use the 32-LQFP (7x7) package with identical pinout and signal assignments.

Q: What supply voltage range do these microcontrollers support?

A: Both parts operate within 2.7V to 3.6V supply voltage range, suitable for battery-powered and low-voltage applications.

Q: What connectivity interfaces are available on these microcontrollers?

A: Both parts include SMBus (2-Wire/I2C), SPI, and UART/USART interfaces for serial communication and peripheral connectivity.

Q: Are firmware changes required when switching from C8051F350 to C8051F350-GQ?

A: No. Firmware compatibility is maintained due to identical core processor architecture, memory organization, and peripheral configuration.