6-Channel DS3/E3 Line Interface Unit (LIU) with Jitter Attenuator, SONET Desynchronizer and R³ Technology™
OBS (Obsolete)
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Information 6-Channel DS3/E3 Line Interface Unit (LIU) with Jitter Attenuator, SONET Desynchronizer and R³ Technology™
Package BGA-217
Temperature Range (°C) Ind.
# of Channels 6
Clk Rec Yes
Data Rate(s) DS3, E3, STS-1
Op Pwr Sup/Max Cur 3V ±5%
SH/LH n/a
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The XRT75R06D is a six-channel DS3/E3 Line Interface Unit (LIU) with desynchronizer with R3 TechnologyTM. It incorporates an independent receiver for each channel, transmitter and jitter attenuator, and supports E3 (34.368.Mbps), DS3 (44.736Mbps) and STS-1 (51.84 Mbps) modes of operation. The device has a differential receiver, which provides a high noise interference margin capable of receiving data from cables of over 1,000 feet or up to 12dB of cable attenuation. It contains an onboard Pseudo Random Binary Sequence (PRBS) generator and detector with the ability to insert and detect single bit error. This function can be used for diagnostic purposes. The device meets jitter and wander specifications described in the T1.105.03b, and ETSI TBR-24, and is compliant with jitter transfer templates outlined in ITU G.751, G.752 and G.755. It also provides a serial microprocessor interface as well as hardware mode for configuration and control.

R3 TechnologyTM Overview

Exar's R3 TechnologyTM (Reconfigurable, Relayless Redundancy), first introduced in 2002 as a breakthrough capability delivering key benefits to customers designing T1/E1/J1 interface cards has now been extended to the higher speed DS3/E3 environment. Already 3 and 12 channel devices have been announced incorporating this revolutionary technology. The devices are frequency Reconfigurable enabling customers to build one board with a single bill-of-materials. In addition, 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.


  • R3 TechnologyTM (Reconfigurable, Relayless, Redundancy)
  • On chip Clock and Data Recovery for high-input jitter tolerance
  • Meets DS3/E3/STS-1 Jitter Tolerance Requirements
  • Detects and Clears LOS as per G.775
  • Tri-state Transmit output capability for redundancy applications
  • Compliant with Bellcore GR-499, GR-253 and ANSI T1.102 Specification for transmit pulse
  • Transmitters can be turned on or off
Jitter Attenuator
  • On-chip advanced crystal-less Jitter Attenuator for each channel
  • 16 02 32 bits selectable FIFO size
  • Meets ETSI TBR Jitter Transfer Requirements
Control and Diagnostics:
  • Parallel Microprocessor Interface for control ands configuration
  • Each Channel supports Analog, Remote and Digital Loop-backs
  • Single 3.3V ± 5% power supply
  • Pb-Free, RoHS Compliant Versions Offered

  • Digital Access and Cross Connect Systems
  • Routers
  • DSLAMs
  • Fiber Optic Terminals

Documentation & Design Tools

Type Title Version Date File Size
Application Notes TAN-200, MaxLinear APIs - OS Portability 1.0.0 August 2007 88.5 KB
Application Notes TAN-075, DS-3/E3 LIU Layout Recommendations 1.0.0 February 2007 29.8 KB
Simulation Models
Package Type Vcc Temp Mode Version File
BGA 3.3V Industrial 2
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Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package

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

Additional Quality Documentation may be available, please Contact Support.

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Suggested Replacement PDN
XRT75R06DIB-F PBGA217 -40 85 OBS
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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.


Pkg Code Details Quantities Dimensions PDF
  • JEDEC Reference: MO-219
  • MSL Pb-Free: L4 @ 245ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 21.6ºC/W
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: n/a
  • Quantity per Tube: n/a
  • Quantity per Tray: 126
  • Reel Size (Dia. x Width x Pitch): n/a
  • Tape & Reel Unit Orientation: n/a
  • Dimensions: mm
  • Length: 15.00
  • Width: 15.00
  • Thickness: 1.56
  • Lead Pitch: 0.80
  • JEDEC Reference: n/a
  • MSL Pb-Free: L4 @ 245ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 17.5ºC/W
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: n/a
  • Quantity per Tube: n/a
  • Quantity per Tray: 60
  • Reel Size (Dia. x Width x Pitch): n/a
  • Tape & Reel Unit Orientation: n/a
  • Dimensions: mm
  • Length: 23.00
  • Width: 23.00
  • Thickness: 2.51
  • Lead Pitch: 1.27


Distribution Date Description File
02/03/2022 Product Discontinuation Notice
03/20/2017 Material Change: Substrate material are changed from halogen type to halogen free type.
10/03/2013 Product Discontinuation Notification Discontinued.

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The -F suffix indicates ROHS / Green compliance: