Products > Integrated Circuits (ICs) > Communication & Networking ICs > PM8611-PI
  • PM8611-PI

Images are for reference only.


Telecom Interface ICs SBI Bus Serializer for One 77MHz SBI336 Bus

  • Package/Case :
  • BGA-160
  • Product Categories :
  • Communication & Networking ICs
  • RoHs Status:
  • Lead free / RoHS Compliant
  • In-stock:
  • 282


Request for Quotation

Warm Tips: Please fill out the below form and we will contact you as soon as possible.

PM8611-PI Product Details

The PM8611-PI SBI336 Bus Serializer, SBSLITE, is a monolithic integrated circuit that implements conversion between a byte-serial 77.76MHz SBI336 bus and redundant 777.6Mbps bit-serial 8B/10B-base SBI336S bus. In TelecomBus mode the SBSLITE implements conversion between a 77.76MHz TelecomBus format and redundant 777.6Mbps bit-serial 8B/10B-base serial TelecomBus format. In line with the bus conversion is a DS0 granular switch allowing any input DS0 to be output on any output DS0. 

The SBSLITE can be used to connect and switch high-density T1/E1 framer devices supporting an SBI bus with link layer devices supporting an SBI bus over a serial backplane. Putting the Narrowband Switch Element, NSE, between the framer and link layer devices allows construction of up to 20Gb/s NxDS0 switches. 

In the ingress direction, the SBSLITE connects an incoming 77.76MHz SBI336 stream to a pair of redundant serial SBI336S LVDS links through a DS0 memory switch. In TelecomBus mode an incoming 77.76MHz TelecomBus that has the J1 path fixed and all high order pointer justifications converted to tributary pointer justifications can be switched through a VT/TU granular switch to a pair of redundant serial LVDS TelecomBus format links. The incoming data is encoded into an extended set of 8B/10B characters and transferred onto two redundant 777.6 Mbps serial LVDS links. SBI or TelecomBus frame boundaries, pointer justification events and master timing controls are marked by 8B/10B control characters. Incoming SPEs may be optionally overwritten with the locally generated X23 + X18 + 1 PRBS pattern for diagnosis of downstream equipment. The PRBS processor is configurable to handle any combination of SPEs and can be inserted independently into either of the redundant LVDS links. A DS0 memory switch provides arbitrary mapping of streams on the incoming SBI336 bus stream to the working and protect LVDS links at DS0 granularity. In TelecomBus mode a VT/TU memory switch provides arbitrary mapping of tributaries on the incoming TelecomBus stream to the working and protect LVDS links. Multi-cast is supported. 

In the egress direction, the SBSLITE connects two independent 777.6 Mbps serial LVDS links to an outgoing SBI336 Bus. Each link contains a constituent SBI336S stream. Bytes on the links are carried as 8B/10B characters. The SBSLITE decodes the characters into data and control signals for a single 77.76MHz SBI336 bus. Alternatively the SBSLITE decodes two independent 777.6 Mbps TelecomBus formatted serial LVDS links characters into a single 77.76MHz TelecomBus. A pseudo-random bit sequence (PRBS) processor is provided to monitor the decoded payload for the X23 + X18 + 1 pattern in each SPE. The PRBS processor is configurable to handle any combination of SPEs in the serial LVDS link. Data on the outgoing SBI336 bus stream may be sourced from either of the LVDS links. 

An In-band signaling link over the serial LVDS links allows this device to be controlled by a companion-switching device, the Narrowband Switching Element, NSE20G. This link can be used as communication link between a central processor and the local microprocessor. 

Two loop backs are provided on the SBSLITE. The transmit 8b/10b to receive 8b/10b loop back allows data entering on the incoming bus to be looped back from the output of the TW8E and TP8E to the input of the RW8D and RP8D, respectively. Only the data looped back on the active link (working or protection) will make it back to the outgoing bus. The transmit to receive loop back allows data entering on the incoming bus to be looped back from the output of the ICASM to the input of the OCASE and then returned to the outgoing bus.


• SBI converter and TDM SBI switch 

• Byte wide 77.76MHz SBI336 bus to 777.6MHz serial SBI336S converter. 

• DS0, NxDS0, T1, E1, TVT1.5, TVT2, DS3 and E3 granular SBI336 to serial SBI336S switch. Supports sub-rate link switching with the restriction that sub-rate links must be symmetric in both the transmit and receive directions. 

• VT/TU channelized TelecomBus to TelecomBus converter and TDM switch. 

• Byte wide 77.76MHz TelecomBus to serial 777.6MHz TelecomBus converter. 

• VT/TU, STS/AU 77.76MHz TelecomBus to serial TelecomBus switch. 

• With the Narrowband Switch Element, NSE, the SBSLITE can be used to implement a DS0 granularity SBI Memory:Space:Memory switch scaleable to 20Gb/s. In TelecomBus mode a 20Gb/s VT/TU granularity Memory:Space:Memory switch can be implemented. 

• Integrates two independent DS0 granularity Memory Switches. One switch is placed between the incoming 77.76MHz byte wide SBI336 bus and the transmit working and protect Serial SBI336S link. The transmit working and protect links transmit the same data. The other switch is placed between the receive working or protect Serial SBI336S link and the outgoing 77.76MHz byte wide SBI336 bus. 

• Nominal latency through the SBSLITE in DS0 mode is 125uS. Channel Associated Signaling (CAS) latency through the SBSLITE in DS0 mode is two T1 multi-frame (6mS) or two E1 multi-frame (4mS). 

• In TelecomBus mode or SBI mode without DS0 level switching nominal latency through the SBSLITE is <15uS. 

• The Memory Switch permits any receive or incoming byte from an input port to be mapped to any outgoing or transmit byte, respectively, on the associated output port 

• Supports redundant working and protect serial SBI336S links in support of a redundant Memory:Space:Memory switch with the NSE. 

• Encodes and decodes byte wide SBI336 bus control signals for all SBI supported link types and clock modes for transport over the serial SBI336S interface. 

• Encodes data from the Incoming SBI336 bus or TelecomBus stream to a working and protect 777.6Mbps LVDS serial links with 8B/10B-based encoding. 

• Decodes data from a working and protect 777.6MHz LVDS serial links with 8B/10B-based encoding to the Outgoing SBI336 bus or TelecomBus stream. 

• In SBI mode switches Channel Associated Signaling bits, CAS, with all DS0 data. 

• Uses 8B/10B-based line coding protocol on the serial links to provide transition density guarantee and DC balance and to offer a greater control character vocabulary than the standard 8B/10B protocol. 

• Provides optional PRBS generation for each outgoing LVDS serial data link for off-line link verification. PRBS can be inserted with STS/AU granularity. 

• Provides PRBS detection for each incoming LVDS serial link for off-line link verification. PRBS is verified with STS/AU granularity. 

• Provides pins to coordinate updating of the connection map of the memory switch blocks in the local device, peer SBSLITE devices and companion NSE switch device. 

• Can communicate with the NSE switch device over an in-band communications channel in the LVDS links. This channel includes mechanisms for central control and configuration. 

• Derives all internal timing from a single 77.76MHz system clock. 

• Implemented in 1.8V/3.3V 0.18μm CMOS and packaged in a 160 ball 15mmx15mm PBGA. 

• Low power consumption of 0.95W (typical). 


• T1/E1 SONET/SDH Cross-connects 

• T1/E1 SONET/SDH Add-Drop Multiplexers 

• Multi-service Access Multiplexers 

• Multi-Service Switches (MSS) 

• Multi-service Provisioning Platforms (MSPP) 

• Serial Backplane Board Interconnect 

• Shelf to Shelf Cabled Serial Interconnect 

• Voice/Media Gateways 

PM8611-PI Pinout
(Picture: Pinout)

Technical Parameters

  • Manufacturer
  • PMC
  • Packing
  • Tape & Reel (TR)/Cut Tape (CT)/Tray/Tube
  • RoHs Status
  • Lead free / RoHS Compliant
  • Package/Case
  • BGA-160

PM8611-PI Documents

PM8611-PI Related Products

Ratings and Reviews (1)

  • 5 / 5
  • 5 Stars 100%
  • 4 Stars 0%
  • 3 Stars 0%
  • 2 Stars 0%
  • 1 Stars 0%
  • **김상구***

    Thank you very much!, 1A-supplier!

  • Ratings
  • Please rate the product!
Shipping More
Estimated Delivery Time: Jul 02 - Jul 07 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.We provide 90 days warranty.

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 PM8611-PI is the original manufacturer or agent of PMC?
We have a professional business development department to strictly test and verify the qualifications of PMC original manufacturers and agents. All PMC suppliers must pass the qualification review before they can publish their PM8611-PI devices; we pay more attention to the channels and quality of PM8611-PI products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of PM8611-PI chips? Including PMC original factory information, application, PM8611-PI pictures?
You can use Jotrin's intelligent search engine, or filter by Communication & Networking ICs category, or find it through PMC-Sierra, Inc (Microsemi) Information page.
Q: Are the PMC's PM8611-PI price and stock displayed on the platform accurate?
The PMC's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for PM8611-PI, 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 PM8611-PI?
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 PM8611PI we delivered, we will accept the replacement or return of the PM8611-PI 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 PM8611-PI.
(3)The PM8611-PI 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 PM8611-PI datasheet pdf, PM8611 pin diagram?
Need any After-Sales service, please feel free contact us:

PMC-Sierra, Inc (Microsemi)

PMC-Sierra is the premier Internet infrastructure semiconductor solution provider, offers its customers technical and sales support worldwide through a network of offices in North America, Europe, Israel and Asia. PMC-Sierra provides semiconductor solutions for Enterprise Storage, Wide Area Network...

Certificates & Honor

Certificates & Honor