The SP3508 is a monolithic device that supports eight (8) popular serial interface standards for Wide Area Network (WAN) connectivity. The SP3508 is fabricated using a low power BiCMOS process technology, and incorporates a regulated charge pump allowing +3.3V only operation. Exar's patented charge pump provides a regulated output of +5.5V, which will provide enough voltage for compliant operation in all modes. Eight (8) drivers and eight (8) receivers can be configured via software for any of the above interface modes at any time. The SP3508 requires no additional external components for compliant operation for all of the eight (8) modes of operation other than six capacitors used for the internal charge pump. All necessary termination is integrated within the SP3508 and is switchable when V.35 drivers and V.35 receivers, or when V. receivers are used. The SP3508 provides the controls and transceiver availability for operating as either a DTE or DCE.
Additional features with the SP3508 include internal loopback that can be initiated in any of the operating modes by use of the LOOPBACK pin. While in loopback mode, receiver outputs are internally connected to driver inputs creating an internal signal path bypassing the serial communications controller for diagnostic testing. The SP3508 also includes a latch enable pin with the driver and receiver address decoder. The internal V. or V.35 termination can be switched off using a control pin (TERM_OFF) for monitoring applications. All eight (8) drivers and receivers in the SP3508 include separate enable pins for added convenience. The SP3508 is ideal for WAN serial ports in networking equipment such as routers, access concentrators, network muxes, DSU/CSU's, networking test equipment, and other access devices.
For technical support or help choosing a product please email Exar’s Serial Technical Support group at: email@example.com.
- Fast 20Mbps Differential Transmission Rates
- Internal Transceiver Termination Resistors for V.11 & V.35
- Interface Modes:
- RS-232 (V.28)
- EIA-530 (V.10 & V.11)
- EIA-530A (V.10 & V.11)
- X.21 (V.11)
- V.35 (V.35 & V.28)
- Protocols are Software Selectable with 3-Bit Word
- Eight (8) Drivers and Eight (8) Receivers
- Termination Network Disable Option
- Internal Line or Digital Loopback for Diagnostic Testing
- Certified conformance to NET1/NET2 and TBR-1
- TBR-2 by TUV Rheinland (TBR2/30451940.001/04)
- Easy Flow-Through Pinout
- +3.3V Only Operation
- Individual Driver and Receiver Enable/Disable Controls
- Operates in either DTE or DCE Mode
Parts & Purchasing
|Part Number||Pkg Code||RoHS||Min Temp||Max Temp||Status||Buy Now||Order Samples|
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.
|04/04/2017||Qualification of alternate assembly subcon, Greatek, Taiwan.||PCN16-1149-01 Greatek-1033.pdf|
|01/11/2016||Alternate foundry Addition of Silan as an alternate foundry.||pcn 15-0940-02 silan-1033.pdf|
|10/03/2013||Addition of an alternate qualified assembly site, ASE Chung-Li (Taiwan). Material change and alternate assembly site.||PCN_13-0623-03-1033.pdf|
|03/08/2012||Wafer Fabrication Facility Wafer foundry request.||PCAN_12-0206-01-1033.pdf|
|08/10/2011||Material change and a new assembly & test supplier (ASE, Kunshan). Business consolidation.||PCN_11-0724-01-1033.pdf|
|07/30/2010||Process Change. Capacity enhancement.||PCN_10-0715-01-1033.pdf|
|01/30/2009||Notice of Last-time Buy and Obsolescence Package Discontinuation Notice||PDN_090130-01-1033.pdf|
|01/08/2008||Change of assembly subcontractor for all Sipex part numbers packaged in the 100 lead LQFP packages from Carsem to Unisem’s Batam plant (formerly AIT), and conversion of all Sipex part number in 80 lead MQFP packages built at Carsem to 80 lead LQFP packages built at Unisem’s Batam plant (formerly AIT). Current subcontractor, Carsem, is discontinuing the packages.||pcn07-1102-06a-1033.pdf|
|02/28/2007||Product Obsolescence Letter and Discontinuation Notification. Discontinued.||POL_022807-1033.pdf|
|06/26/2006||Amendment of PCN transferring certain Power Management and Interface Products from Hillview fabrication and facility to wafer foundary Episil instead of Silan. See attached Product List Power Management and Interface products as listed are being transfer to external wafer foundry, due to cessation of operations of the sipex Hillview Fabrication manufacturing site||PCN 06-0130-10b-1033.pdf|
|05/08/2006||Announcing transfer of certain Power Management and Interface Products from Hillview fabrication and facility to wafer foundary Silan. See attached Product List Power Management and Interface products as listed are being transfer to external wafer foundry, due to cessation of operations of the sipex Hillview Fabrication manufacturing site||PCN-06-0130-10a-1033.pdf|
|02/02/2006||Announcing transfer of certain Power Management and Interface Products from Hillview fabrication and facility to wafer foundary Silan. See attached Product List Power Management and Interface products as listed are being transfer to external wafer foundry, due to cessation of operations of the sipex Hillview Fabrication manufacturing site||PCN-06-0130-10-1033.pdf|
Frequently Asked Questions
In this example, we looked for XRA1201. When you hover over it, it will turn grey and you can click anywhere in the grey box. This brings you to the product page. For example:
Click on Parts & Purchasing, highlighted in yellow 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:
Another method to find out if a part is OBS or EOL is to click on SUPPORT:
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.