SI4032-B1-FMR is available for purchase but is not normally stocked.
Available Substitutes:

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Texas Instruments
In Stock: 3.641
Unit Price: €1.57000
Datasheet
RF Transmitter FSK, GFSK, OOK 240MHz ~ 930MHz 20dBm 256kbps PCB, Surface Mount Antenna 20-VFQFN Exposed Pad
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SI4032-B1-FMR

DigiKey Part Number
SI4032-B1-FMR-ND - Tape & Reel (TR)
Manufacturer
Manufacturer Product Number
SI4032-B1-FMR
Description
RF TX IC FSK 240-930MHZ 20VFQFN
Customer Reference
Detailed Description
RF Transmitter FSK, GFSK, OOK 240MHz ~ 930MHz 20dBm 256kbps PCB, Surface Mount Antenna 20-VFQFN Exposed Pad
Datasheet
 Datasheet
Product Attributes
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Category
Power - Output
20dBm
Manufacturer
Silicon Labs
Current - Transmitting
30mA
Series
Data Interface
PCB, Surface Mount
Packaging
Tape & Reel (TR)
Antenna Connector
PCB, Surface Mount
Part Status
Not For New Designs
Voltage - Supply
1.8V ~ 3.6V
DigiKey Programmable
Not Verified
Operating Temperature
-40°C ~ 85°C
Frequency
240MHz ~ 930MHz
Mounting Type
Surface Mount
Applications
General Purpose
Package / Case
20-VFQFN Exposed Pad
Modulation or Protocol
FSK, GFSK, OOK
Supplier Device Package
20-QFN (4x4)
Data Rate (Max)
256kbps
Base Product Number
Environmental & Export Classifications
Product Questions and Answers
Additional Resources
Substitutes (1)
Part NumberManufacturerQuantity AvailableDigiKey Part NumberUnit PriceSubstitute Type
CC115LRGPRTexas Instruments3.641296-35721-1-ND€1.57000Similar
Available To Order
Not recommended for new design, minimums may apply View Substitutes or Alternative Package Types
All prices are in EUR
Tape & Reel (TR)
QuantityUnit PriceExt Price
2.500€3.93023€9,825.57
Manufacturers Standard Package
Unit Price without VAT:€3.93023
Unit Price with VAT:€4.75558