What is a cross-reference page for C8051F221?
This page groups mapped replacement options for C8051F221 so buyers and engineers can compare alternatives before requesting a quote or approving a substitute.
Alternative part analysis
C8051F221 replacements, alternatives, and cross reference
Compare mapped replacement and alternative options for C8051F221, then verify package, specifications, and application fit before approval.
Compare C8051F221 against mapped replacement options
Review package, lifecycle, stock, and MOQ in one view
Move from engineering screening to RFQ without leaving the page
No mapped replacement parts yet
This product currently does not show a published cross-reference list. Use RFQ support if your team needs an alternative part review.
Specification view
Parameter Comparison Chart
A side-by-side view of the source part and its mapped alternatives so buyers and engineers can screen package, availability, lifecycle, and key descriptors before RFQ.
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| Parameter Comparison Chart | Current part C8051F221 Silicon Labs |
|---|---|
| Part Number | C8051F221 |
| Manufacturer | Silicon Labs |
| Category | Integrated Circuits (ICs) |
| Subcategory | Embedded - Microcontrollers |
| Package | LQFP |
| Series | C8051F2xx |
| Key Attributes | - |
| Description | IC MCU 8BIT 8KB FLASH 32LQFP |
| Lifecycle | - |
| Stock | 72,030 |
| Available | 25,064 |
| Min Order | 1 |
| Datasheet | Available |
| Height Seated (Max) | 1.6mm |
| RoHS Status | RoHS non-compliant |
| JESD-609 Code | e0 |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
| HTSUS | 8542.31.0001 |
| Memory Size | 8kB |
| Oscillator Type | Internal |
| Connectivity | SPI, UART/USART |
| RAM Size | 256 x 8 |
| Core Size | 8-Bit |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER |
| ROM (words) | 8192 |
| Program Memory Size | 8KB 8K x 8 |
| Peripherals | Brown-out Detect/Reset, POR, WDT |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Number of Timers/Counters | 3 |
| Bit Size | 8 |
| Program Memory Type | FLASH |
| DMA Channels | NO |
| Data Bus Width | 8b |
| Has ADC | YES |
| DAC Channels | NO |
| PWM Channels | NO |
| Supply Voltage-Min (Vsup) | 2.7V |
| Voltage - Supply (Vcc/Vdd) | 2.7V~3.6V |
| Core Processor | 8051 |
| Access Time | 25 μs |
| Data Converter | A/D 22x8b |
| Packaging | Tray |
| ECCN | EAR99 |
| Lead Free | Contains Lead |
| Mounting Type | Surface Mount |
| Part Status | Obsolete |
| Published | 2000 |
| Categories | Integrated Circuits (ICs) |
| Terminal Form | GULL WING |
| Technology | CMOS |
| Terminal Pitch | 0.8mm |
| Terminal Position | QUAD |
| Interface | SPI, UART, USART |
| Operating Temperature | -40°C~85°C TA |
| Supply Voltage | 3V |
| Subcategory | Microcontrollers |
| Sub-Categories | Embedded - Microcontrollers |
| Max Power Dissipation | 1W |
| Package / Case | 32-LQFP |
| Surface Mount | YES |
| Radiation Hardening | No |
| Number of I/O | 22 |
| Frequency | 25MHz |
| Length | 7mm |
| Number of Terminations | 32 |
| Number of Pins | 32 |
| Pin Count | 32 |
| Manufacturer | Silicon Labs |
| Series | C8051F2xx |
| Base Part Number | C8051F2 |
| Manufacturer's Part No. | C8051F221 |
| Actions |
Cross-reference FAQ
Replacement Part Questions
Short answers for teams reviewing C8051F221 replacement and equivalent-part options.
Does a mapped alternative mean a guaranteed drop-in replacement for C8051F221?
Not automatically. Cross-reference mapping helps shortlist candidates, but package, electrical behavior, qualification scope, and approval rules still need to be checked before release.
Which parameters should teams compare first for C8051F221 alternatives?
Start with package, series, key attributes, lifecycle status, stock position, datasheet access, and the mapped pin-to-pin or cross-reference note. Then confirm application-specific requirements in the datasheet and RFQ stage.
Can I request a quote for an alternative to C8051F221?
Yes. Use the product links or RFQ actions on this page to request pricing, availability, documentation, and sourcing support for any listed alternative part.
Is C8051F221 obsolete, and what replacement should buyers review first?
Check the lifecycle row on this page first. If buyers need a fast starting point, the strongest mapped replacement currently surfaced here is , followed by the other alternatives shown in the comparison table.
Engineering support
Need help validating the replacement path?
If your team is unsure whether a mapped alternative to C8051F221 from Silicon Labs is really usable, contact us for help on package fit, pin compatibility, key parameter gaps, and qualification-facing review questions.
Contact a hardware engineer
Email our engineering support contact at [email protected], or use the contact page if the question should be routed across sourcing, engineering, and support.
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Package and pin compatibility
Review whether the alternate path looks credible from package, footprint, and pin-level perspectives.
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Parameter and function gaps
Surface the electrical, interface, or application-fit questions that still need confirmation before approval.
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Qualification and approval prep
Organize the documentation, datasheet evidence, and validation checkpoints your internal team may still require.