Single Chip E1 Line Interface Unit
OBS (Obsolete)
Order Now


Information Single Chip E1 Line Interface Unit
Package SOIC-16
# of Channels 1
Clk Rec No
Data Rate(s) E1
Op Pwr Sup/Max Cur 3.3V ±5%, 56mA
Show more

The XRT59L91 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
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

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
XRT59L91ID-F WSOIC16 -40 85 OBS
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-013
  • MSL Pb-Free: L3 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 69.1ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 47
  • Quantity per Reel: 1500
  • Quantity per Tube: 47
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 16 x 12
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 10.30
  • Width: 7.50
  • Thickness: 2.65
  • Lead Pitch: 1.27


Distribution Date Description File
02/03/2022 Product Discontinuation Notice
08/10/2017 Qualification of alternate assembly subcon, ANST.
11/16/2015 Updated information subsequent to original published PCN 15-0625-02 on 09/29/2015. Addendum: Update to package marking.
09/29/2015 Greatek as alternate assembly site Addition of an alternate production site, Greatek, Taiwan for 16L, 24L and 28L SOICW
07/15/2010 Change in packing quantity per reel. Standardization
07/14/2010 Standardize packing quantity in tubes, NSOIC9 (97 to 98 units/tube), WSOIC16 (46 to 47 units/tube), TSSOP16 (94 to 95 units/tube) Standardization

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

Visit the product page for the part you are interested in.  The part's status is listed in the Parts & Purchasing section.  You can also view Product Lifecycle and Obsolescence Information including PDNs (Product Discontinuation Notifications).
To visit a product page, type the part into the search window on the top of the MaxLinear website.
In this example, we searched for XRA1201.  Visit the product page by clicking the part number or visit the orderable parts list by clicking "Orderable Parts". 



The Parts & Purchasing section of the product page shows the Status of all orderable part numbers for that product.  Click Show obsolete parts, to see all EOL or OBS products.



The -F suffix indicates ROHS / Green compliance: