Not Recommended for New Designs: This part is Not Recommended for New Designs (NRND). For newer designs, we recommend you use:
Device/Module image

Si4421

Proprietary EZRadio Sub-GHz Wireless ICs

The Si4421 EZRadioPRO ISM Band is available in an TSSOP16 package.

 

Key Specs

 
Output Power (dBm)
7
Max Data Rate (FSK)
115
Max Data Rate (OOK)
0
RX Sensitivity (dBm)
Output Power (dBm)
7
Max Data Rate (FSK)
115
Max Data Rate (OOK)
0
RX Sensitivity (dBm)
EZRadio Block Diagram

Quality Assurance, Environmental and Packaging Information

Silicon Labs targets a minimum of a 10-year lifecycle for all of its standard producs and expects to produce the Si4421 until at least October 2022.

The longevity date shown above is for the preferred revision of this part number, for a complete list of part number revisions, use the search button below.

As part of its ongoing commitment to supply continuity, Silicon Labs may provide pin-compatible and functionally equivalent replacement products if Silicon Labs determines, at its discretion, that supply chain adjustments, product improvements, market conditions, or similar business or technical issues make this necessary or advisable.

If for business, technical or other reasons beyond Silicon Labs’ reasonable control, Silicon Labs finds that it is necessary to discontinue a product, our policy is to issue an EOL notice that provides 6 months from notice to place final orders and 12 months from notice for final shipments. This policy complies with the JEDEC standard EIA/JESD48 that is commonly used in the semiconductor industry. We provide the required support for a product for its full life cycle.

Find and download additional quality, environmental, device composition, test results, shipping and supply chain information for Silicon Labs devices.

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