C8051F353R Equivalent & Substitute Parts

Part Overview

The C8051F353R 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 part is currently listed as obsolete, making substitute identification critical for ongoing system support and new design implementations. The C8051F353-GM provides a direct functional equivalent with improved product status and compliance certifications.

Substiute Parts

C8051F353R

Silicon LabsIn Stock: 1126C8051F353R Datasheet

Current PartRFQ

C8051F353-GM

Silicon LabsIn Stock: 8651C8051F353-GM Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The C8051F353-GM qualifies as a direct substitute for the C8051F353R based on identical electrical and mechanical parameters. Substitution is valid when the following criteria are met:

• Identical core processor architecture (8051)
• Matching core size (8-Bit)
• Identical clock speed (50MHz)
• Identical program memory capacity and type (8KB FLASH)
• Identical RAM configuration (768 x 8)
• Matching voltage supply range (2.7V ~ 3.6V)
• Identical data converter specifications (A/D 8x16b; D/A 2x8b)
• Identical I/O count (17)
• Identical connectivity interfaces (SMBus, SPI, UART/USART)
• Identical peripheral set (POR, PWM, Temp Sensor, WDT)
• Matching operating temperature range (-40°C ~ 85°C)
• Identical package form factor (28-VFQFN Exposed Pad, 28-MLP 5x5)

Parameter Comparison

Engineering Selection Recommendations

The C8051F353-GM is the appropriate substitute for the C8051F353R. The primary distinction between these parts is product lifecycle status and regulatory compliance. The C8051F353R is obsolete, whereas the C8051F353-GM maintains active product status with ROHS3 compliance certification. The C8051F353-GM also carries REACH Unaffected status, providing enhanced regulatory alignment for new designs and ongoing production requirements. All electrical and mechanical specifications remain identical, ensuring direct functional equivalence without design modification.

Frequently Asked Questions (FAQ)

Q: Can C8051F353-GM replace C8051F353R in existing designs? A: Yes. Both parts share identical electrical specifications, memory configuration, peripheral set, and package form factor. Direct substitution is valid without circuit modification.

Q: What is the primary advantage of C8051F353-GM over C8051F353R? A: The C8051F353-GM is an active product with ROHS3 compliance and REACH Unaffected status, whereas the C8051F353R is obsolete and RoHS non-compliant. For new designs and long-term production, C8051F353-GM provides superior supply chain stability and regulatory compliance.

Q: Are the package dimensions identical? A: Yes. Both parts use the 28-VFQFN Exposed Pad package with 28-MLP (5x5) form factor. PCB footprints are identical.

Q: Do the parts have the same moisture sensitivity rating? A: Yes. Both parts carry MSL 1 (Unlimited) classification.

Q: Is firmware compatibility guaranteed? A: Yes. Identical core processor architecture, memory configuration, and peripheral set ensure complete firmware compatibility without recompilation or modification.