The SP508E is a monolithic device that supports eight (8) popular serial interface standards for Wide Area Network (WAN) connectivity. The SP508E is fabricated using a low power BiCMOS process technology, and incorporates an Exar regulated charge pump allowing +5V only operation. Exar's patented charge pump provides a regulated output of +5.8V, 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 SP508E requires no additional external components for compliant operation for all of the eight (8) modes of operation other than four capacitors used for the internal charge pump. All necessary termination is integrated within the SP508E and is switchable when V.35 drivers and V.35 receivers, or when V.11 receivers are used. The SP508E provides the controls and transceiver availability for operating as either a DTE or DCE.
Additional features with the SP508E 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 SP508E also includes a latch enable pin with the driver and receiver address decoder. The internal V.11 or V.35 receiver termination can be switched off using a control pin (TERM_OFF) for monitoring applications. All eight (8) drivers and receivers in the SP508E include separate enable pins for added convenience. The SP508E 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.
Applicable U.S. Patents-5,306,954; and others patents pending.
For technical support or help choosing a product please email Exar’s Serial Technical Support group at: email@example.com.
- 20Mbps Differential Transmission Rates
- 15kV ESD Tolerance for Analog I/Os
- Internal Transceiver Termination Resistors for V.11/V.35
- Interface Modes:
- RS-232 (V.28)
- EIA-530 (V.10 & V.11)
- X.21 (V.11)
- EIA-530A (V.10 & V.11)
- RS-449/V.36 – V.35 (V.10 & V.11)
- Software Selectable Protocols with 3-Bit Word
- Eight Drivers and Eight Receivers
- V.35/V.11 Receiver Termination Network Disable Option
- Internal Line or Digital Loopback Testing
- Adheres to NET1/NET2 and TBR-2 Requireme
- Easy Flow-Through Pinout
- +5V Only Operation
- Individual Driver/Receiver Enable/Disable Controls
- Operates in DTE or DCE Mode
- Frame Relay
- Secure Communication Terminals
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|
|03/14/2016||Foundry line qualification. Addition of qualified 6 inch wafer processing line in Silan.||PCN 16-0207-04 Silan 6 inch-1033.pdf|
|12/05/2013||Addition of an alternate qualified assembly site, ASE Chung-Li (Taiwan). Alternate assembly site.||PCN_13-0623-03A-1033.pdf|
|10/03/2013||Qualification of SiO2 5KÅ + SiN 7KÅ passivation to replace PSG 10KÅ passivation. Material & Process Changes.||PCN_13-0522-02-1033.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|
|05/06/2013||Change in wafer fabrication foundry and part numbers. Qualification of an alternate qualified wafer foundry, Silan, in addition to the current wafer foundry, Episil Technologies. Process & datasheet changes.||PCN_12-0522-04-1033.pdf|
|03/08/2012||Wafer Fabrication Facility Wafer foundry request.||PCAN_12-0206-01-1033.pdf|
|10/28/2009||Design and datasheet changes. To improve device performance and to center the propagation delay.||PCN_091020-01-1033.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|
|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 06-0130-02a-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-06-0130-02-1033.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.