XRT7295AT

DS3/STS-1 Integrated Line Receiver
Data Sheet

Description

The XRT7295AT DS3/SONET STS-1 integrated line receiver is a fully integrated receive interface that terminates a bipolar DS3 (44.736Mbps) or Sonet STS-1 (51.84Mbps) signal transmitted over coaxial cable. (See Figure 13).

The device also provides the functions of receive equalization (optional), automatic-gain control (AGC), clock-recovery and data retiming, loss-of-signal and loss-of-frequency-lock detection. The digital system interface is dual-rail, with received positive and negative 1's appearing as unipolar digital signals on separate output leads. The on-chip equalizer is designed for cable distances of 0 to 450ft. from the cross-connect frame to the device. The receive input has a variable input sensitivity control, providing three different sensitivity settings, to adapt longer cables. High input sensitivity allows for significant amounts of flat loss within the system.

The XRT7295AT device is manufactured using linear CMOS technology. The XRT7295AT is available in a 20-pin plastic SOJ package for surface mounting. Two versions of the chip are available, one is for either DS3 or STS-1 operation (the XRT7295AT, this data sheet), and the other is for E3 operation (the XRT7295AE, refer to the XRT7295AE data sheet). Both versions are pin compatible.

For either DS3 or STS-1, an input reference clock at 44.736MHz or 51.84MHz provides the frequency reference for the device.

Features

  • Fully Integrated Receive Interface for DS3 and STS-1 Rate Signals
  • Integrated Equalization (Optional) and Timing Recovery
  • Loss-of-Signal and Loss-of-Lock Alarms
  • Variable Input Sensitivity Control
  • 5V Power Supply
  • Pin Compatible with XRT7295AE and XRT7295AC
  • Companion Device to T7296 Transmitter
  • Pb-Free, RoHS Compliant Versions Offered

Application

  • Interface to DS-3 Networks
  • Digital Cross-Connect Systems
  • CSU/DSU Equipment
  • PCM Test Equipment
  • Fiber Optic Terminals

Design Tools

Packaging

Pkg Code Details Quantities Dimensions PDF
SOJ20
  • JEDEC Reference: MO-088
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 53ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 1000
  • Quantity per Tube: 36
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 24 x 12
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole.
  • Dimensions: inch
  • Length: 0.504
  • Width: 0.296
  • Thickness: 0.13
  • Lead Pitch: 1.27

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
XRT7295ATIW OBS
XRT7295ATIW-F SOJ20 -40 85 Active Order
XRT7295ATIWTR-F SOJ20 -40 85 OBS Suggested:
XRT7295ATIW-F
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 Documents

Additional Quality Documentation may be available, please contact customersupport@maxlinear.com.
Distribution Date Description File
07/12/2017 Product Discontinuation Notice
02/28/2014 Qualification of the 20L SOJ production site, Greatek, Taiwan. Assembly site.
01/24/2014 Qualification of a 20L SOJ assembly site, Greatek, Taiwan. Alternate assembly site.

Frequently Asked Questions

The -F suffix indicates ROHS / Green compliance:
https://www.exar.com/quality-assurance-and-reliability/lead-free-program

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.