Products > Integrated Circuits (ICs) > Interface ICs > SI32171-B-FMR
  • SI32171-B-FMR

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Telecom IC Subscriber Line Interface Concept (SLIC), CODEC 42-QFN (5x7)

Manufacturer : Silicon Laboratories Inc
Package/Case : QFN42
Product Categories : Interface ICs
Datasheet: SI32171-B-FMR Datasheet (PDF)
RoHs Status: Lead free/RoHS Compliant
In-stock: 995


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SI32171-B-FMR Product Details

The SI32171-B-FMR ProSLIC subscriber line interface (SLIC) devices are the industry's first two-chip FXS+FXO solution. These SLIC solutions also offer the lowest power consumption in the industry.


  • Single-chip FXS solution
  • 5 mm x 7 mm QFN package enables smallest board area
  • Lowest power consumption
  • Tracking dc-dc controller
  • Internal balanced or unbalanced ringing
  • Patented low-power ringing
  • Global programmability
  • Simplified configuration and diagnostics supported by ProSLIC API
  • Ringing frequency, amplitude, cadence, and waveshape
  • Transhybrid balance
  • DC current loop feed (10–45 mA)
  • Loop closure and ring trip thresholds
  • Ground key detection threshold
  • Integrated test load
  • Wideband voice support
  • On-hook transmission
  • Loop or ground start operation
  • High voltage line feed option (-140 V: Si32170/3/7; -136 V Si32179)
  • DTMF detection option (Si32170/1/5/8/9)
  • Two-chip FXS+FXO option (Si32178/9)
  • Uses industry-leading voice DAA technology from Si3050
  • Global programmability
  • Greater than 5 kV isolation
  • Up to +6 dBm TX/RX level
  • Parallel handset detection
  • Type I and II caller ID support
  • Integrated ring detector
  • Programmable digital hybrid

SI32171-B-FMR Block Diagram
(Picture: Diagram)

Technical Parameters

  • Function
  • Subscriber Line Interface Concept (SLIC), CODEC
  • Interface
  • Number of Circuits
  • 1
  • Voltage Supply
  • 3.3V
  • Operating Temperature
  • 0??C ~ 70??C
  • Mounting Type
  • Surface Mount
  • Package / Case
  • 42-WFQFN Exposed Pad
  • Supplier Device Package
  • 42-QFN (5x7)

SI32171-B-FMR Datasheet

  • Si3217x + Si32911/19 Single-Chip ProSLIC
  • Si3217x + Si32911/19 Single-Chip ProSLIC
  • Si3217x + Si32911/19 Single-Chip ProSLIC

SI32171-B-FMR Related Products

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    Alles sehr positiv, insbesondere der Preis

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Estimated Delivery Time: Jun 19 - Jun 24 days (choose Expedited at checkout).

Shipping & Payment


  • Shipping Type
  • Ship Fee
  • Lead Time
  • $20.00-$40.00 (0.50 KG)
  • 2-5 days
  • $20.00-$40.00 (0.50 KG)
  • 3-7 days
  • $20.00-$45.00 (0.50 KG)
  • 2-5 days
  • $25.00-$65.00 (0.50 KG)
  • 2-5 days
  • $25.00-$45.00 (0.50 KG)
  • 5-14 days
  • $2.00-$3.00 (0.10 KG)
  • 7-30 days

Processing Time:Shipping fee depend on different zone and country.


  • Terms of payment
  • Hand Fee
  • Payment Site
  • charge US$30.00 banking fee.
  • charge 4.0% service fee.
  • charge 3.5% service fee.
  • charge US$0.00 banking fee.
  • charge US$0.00 banking fee.

We provide high quality products, thoughtful service and after sale guarantee

  • We have rich products, can meet your various needs.

    We have rich products, can meet your various needs.

  • Minimum order quantity starts from 1pcs.

    Minimum order quantity starts from 1pcs.

  • Lowest international shipping fee starts from US$2.00.

    Lowest international shipping fee starts from US$2.00.

  • 90 days quality guarantee for all products.

    90 days quality guarantee for all products.


  • Step1:Product

    Step1: Products

  • Step2:Vacuum packaging

    Step2: Vacuum Packaging

  • Step3:Anti-static bag

    Step3: Anti-Static Bag

  • Step4:Individual packaging

    Step4: Individual Packaging

  • Step5:Packaging boxes

    Step5: Packaging Boxes

  • Step6:bar-code shipping tag

    Step6: Bar-Code Shipping Tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

Jotrin ESD packing


1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


Q: How does Jotrin guarantee that SI32171-B-FMR is the original manufacturer or agent of SILICON LABS?
We have a professional business development department to strictly test and verify the qualifications of SILICON LABS original manufacturers and agents. All SILICON LABS suppliers must pass the qualification review before they can publish their SI32171-B-FMR devices; we pay more attention to the channels and quality of SI32171-B-FMR products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of SI32171-B-FMR chips? Including SILICON LABS original factory information, Interface ICs application, SI32171-B-FMR pictures?
You can use Jotrin's intelligent search engine, or filter by voice ; slic category, or find it through Silicon Laboratories Inc Information page.
Q: Are the SILICON LABS's SI32171-B-FMR price and stock displayed on the platform accurate?
The SILICON LABS's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for SI32171-B-FMR, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
Q: Can I place an order offline?
Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online.
Q: What forms of payment can I use in Jotrin?
TT Bank, Paypal, Credit Card, Western Union, and Escrow is all acceptable.
Q: How is the shipping arranged and track my package?
Customers can choose industry-leading freight companies, including DHL, FedEx, UPS, TNT, and Registered Mail.
Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
Q: What is the process for returns or replacement of SI32171-B-FMR?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the SI32171BFMR we delivered, we will accept the replacement or return of the SI32171-B-FMR only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of SI32171-B-FMR.
(3)The SI32171-B-FMR is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
Q: How to contact us and get support, such as SI32171-B-FMR datasheet pdf, Si3217 pin diagram?
Need any After-Sales service, please feel free contact us:

Silicon Laboratories Inc

Silicon Labs, Inc. is a leading provider of networking, software and system solutions for the Internet of Things, Internet infrastructure, industrial control, consumer electronics and automotive markets. We solve the toughest problems in the electronics industry, providing customers with significant...
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