4-Channel T1/E1/J1 Framer and Line Interface Combination featuring R³ Technology™
Data Sheet


Building on Exar's heritage of delivering market-proven silicon solutions, the Company is capitalizing on its already established functional element devices: Line Interface Unit (LIU), framers, etc., and is combining them into one highly integrated product. The XRT86VL38 and XRT86VL34 greatly reduce board space requirements. They are targeted at telecommunications equipment including SONET/SDH and T1/E1/J1 multiplexers, digital cross-connect systems, wireless base stations, routers among others.

Product Details

The XRT86VL34 is offered in a four-channel version incorporating a T1/E1 (1.544 Mbit/s or 2.048 Mbt/s) framer and a LIU per channel. Each of the framers has its own framing synchronizer and transmit-receive slip buffers. The slip buffers can be independently enabled or disabled as required. Each framer also contains a transmit and overhead data input port, which permits data line terminal equipment direct access to the out-bound T1/E1/J1 frames. The device has a flexible microprocessor interface for easy configuration, control, and status monitoring. Furthermore, the device supports Channel Associated Signaling (CAS), Common Channel Signaling (CCS), supports ISDN primary Rate Interface (ISDN PRI) signaling and has three integrated HDLC Controllers with two 96-byte transmit HDLC buffers and two 96-byte receive buffers per channel. In addition, the XRT86VL34 includes a PRBS, QRSS and network loop code generator/receiver. It also detects OOF, LOF, LOS errors and COFA conditions.

R³ Technology™ Overview

Exar's R³ Technology™ (Reconfigurable, Relayless Redundancy) delivers key benefits to customers designing T1/E1/J1 interface cards. The devices are Reconfigurable with integrated termination supporting all common T1/E1/J1 line impedances enabling customers to build one board with a single bill-of-materials. (Conventional approaches require fixed settings - T1, or E1, or J1, forcing customers to estimate both market needs, and choose device settings before manufacturing.) Also, the series employs Relayless Redundancy eliminating the need for external relays for 1:1 and 1+1 applications by establishing a back-up channel that can be brought on-line in the event of failure.


  • Four-channel Independent, Full Duplex DS1 Tx and Rx Framers and LIUs
  • Interfaces with Leading Microprocessors: Intel, Motorola, MIPS, Power PC
  • Three Integrated HDLC Controllers with Two 96-byte Transmit HDLC Buffers and Two 96-byte Receive Buffers per Channel
  • Pb-Free, RoHS Compliant Versions Offered


  • Channel Service Units (CSUs)
  • Digital Access Cross-connect Systems (DACs)
  • Wireless Base Stations
  • Voice Over Packet Gateways
  • Framer Relay Switches and Access Devices (FRADS)

Design Tools

Simulation Models
Package Type Vcc Temp Mode Version File
PBGA 3.3V Industrial 3


Pkg Code Details Quantities Dimensions PDF
  • JEDEC Reference: MS-034
  • MSL Pb-Free: L4 @ 245ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 24ºC/W
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: 84
  • Quantity per Reel: n/a
  • Quantity per Tube: n/a
  • Quantity per Tray: 84
  • Reel Size (Dia. x Width x Pitch): n/a
  • Tape & Reel Unit Orientation: n/a
  • Dimensions: mm
  • Length: 17
  • Width: 17
  • Thickness: 2.1
  • Lead Pitch: 1.00

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Buy Now Order Samples
XRT86VL34IB PBGA225 -40 85 OBS Suggested:
XRT86VL34IB-F PBGA225 -40 85 Active Order
Show obsolete parts
Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.

Quality & Environmental Data

Part Number RoHS | Exempt RoHS Halogen Free REACH MSL Rating / Peak Reflow Package
XRT86VL34IB-F N Y Y Y L4 / 245ᵒC PBGA225

Click on the links above to download the Certificate of Non-Use of Hazardous Substances.

Additional Quality Documentation may be available, please Contact Support.
Distribution Date Description File
07/26/2016 Product discontinuation notification. Discontinued.


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For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
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Frequently Asked Questions

The best way to determine this is to go to maxlinear.com and type the part into the search function. At or near the top of the results you should see something that looks like:

In this example, we looked for XRA1201. Click on part number header or on the link at the bottom of the result.  This brings you to the product page. For example:


Click on Parts & Purchasing, highlighted with the blue arrow above. The screen changes to:


Notice the status column and the “Show obsolete parts” link.  A legend tells you the definition of the different statuses. Click on the “Show obsolete parts” link to see EOL or OBS part numbers along with the Active part numbers, the legend still present:


Another method to find out if a part is OBS or EOL is to click on SUPPORT at the top:


And then Product Change Notifications:


Type the part into the search, and click on one of the part numbers from the drop down menu. Then you can look for the Product Discontinuation Notice, which generally is at the top of the list, for example:


If you see this, it tells you that this particular orderable part has been discontinued and when the last order date is, or was. If you click on the file, then you can view the notice we sent about this if you purchased the part in the recent past. It may also advise of a replacement part. When an orderable part first becomes discontinued, Product Discontinuation Notices are sent are sent to those who have purchased the parts in the recent past, if purchased directly, with a dated opportunity to place a last order.

The -F suffix indicates ROHS / Green compliance:

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