7-Channel E1 Line Interface Unit
Data Sheet EOL (End of Life)


Information 7-Channel E1 Line Interface Unit
Package TQFP-100
# of Channels 7
Clk Rec No
Data Rate(s) E1
Op Pwr Sup/Max Cur 3.3V ±5%, 175mA
Show more

The XRT5997 is a seven-channel E1 Line Interface Unit (LIU), and, along with the XRT59L91 single-channel E1 transceiver, provide a wide array of design options, and capabilities for leading-edge, high-speed data transmission -- including Synchronous Digital Hierarchy (SDH) -- applications.

The XRTL91 and XRT5997 are primarily targeted toward manufacturers of E1 equipment. Some of the primary target applications include telecommunications manufacturers utilizing multi-channel line cards, as well as, network multiplexers, central office switches and digital cross connects.

Typical of SDH applications, E1 line cards have 21 channels. By virtue of Exar's innovative seven-channel design (XRT5997), only three devices, instead of the customary seven, are needed for a standard Analog Front End (AFE). This device count reduction improves both board real estate, and system costs allowing OEMs to offer the latest, most competitive systems to their customers.

For each device, there is an independent driver and receiver circuitry for each channel, allowing seamless Pulse Code Modulation (PCM) interfacing. Each of the drivers can be independently disabled giving designers' greater flexibility in developing optimal power management and back-up redundancy solutions.

Because both devices are based upon standard CMOS process, conversion of AMI line coded signals to TTL/CMOS logic levels is virtually automatic. In addition, designers have the flexibility to interface to either 75 or 120-Ohm lines for transformer coupled configurations.

The XRT59L91ID is available in a 16-lead JEDEC SOIC package. Similarly, the XRT5997IV is available in a 100-pin TQFP package. Both products are designed for industrial temperature ranges.

  • Complete Single or Seven Channel E1 Transceiver
  • Low Power 3.3V Operations
  • TCLK Duty Cycle Adjust Circuitry
  • Pb-Free, RoHS Compliant Versions Offered

  • Network Mulitplexers
  • Central Office Switch
  • Digital Cross Connext
  • Telecommunications

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets XRT5997 Seven-Channel E1 Line Interface Unit 1.0.0 November 1999 367.7 KB
Application Notes TAN-200, MaxLinear APIs - OS Portability 1.0.0 August 2007 88.5 KB
Application Notes TAN-058, DS-1/E1 GR-1089 Surge Protection 1.0.1 September 2006 69.4 KB
Product Brochures Interface Brochure October 2019 1.3 MB
Register for a myMxL account or Login to myMxL to view all Technical Documentation & Design Tools.

Quality & RoHS

Part Number RoHS | Exempt RoHS Halogen Free REACH TSCA MSL Rating / Peak Reflow Package
XRT5997IVTR-F N Y Y Y Y L3 / 260ᵒC TQFP100

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 Buy Now PDN
XRT5997IV-F LQFP100 -40 85 OBS XRT5997IVTR-F
XRT5997IVTR-F LQFP100 -40 85 EOL
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.


Pkg Code Details Quantities Dimensions PDF
  • JEDEC Reference: MS-026
  • MSL Pb-Free: L3 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 45.7ºC/W
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 1000¹
  • Quantity per Tube: n/a
  • Quantity per Tray: 90
  • Reel Size (Dia. x Width x Pitch): 330 x 24 x 20
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole.
  • Dimensions: mm
  • Length: 14.00
  • Width: 14.00
  • Thickness: 1.60
  • Lead Pitch: 0.50


Distribution Date Description File
02/03/2022 Product Discontinuation Notice
10/26/2018 Product Discontinuation Notice
04/04/2017 Qualification of alternate assembly subcon, Greatek, Taiwan.
07/18/2014 Elimination of back mark. Eliminate back mark; consolidate information in top mark.
10/03/2013 Addition of an alternate qualified assembly site, ASE Chung-Li (Taiwan). Material change and alternate assembly site.

FAQs & Support

Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
For ordering information and general customer service visit our Contact Us page.

Submit a Technical Support Question As a New Question

The -F suffix indicates ROHS / Green compliance:

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.