|Information||Rugged 3.3V, 20Mbps, 8 Channel Multiprotocol Transceiver with Programmable DCE/DTE and Termination Resistors|
|Supported Protocols||RS232, RS449, EIA530, EIA530A, V.10, V.11, V.28, V.35, V.36, X.21|
|Supply Voltage (Nom) (V)||3.3|
|No. of Tx||8|
|No. of Rx||8|
|Data Rate (Mbps)||20|
|HBM ESD (kV)||2|
|Temperature Range (°C)||0 to 70, -40 to 85|
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.
- 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
Documentation & Design Tools
Quality & RoHS
|Part Number||RoHS | Exempt||RoHS||Halogen Free||REACH||TSCA||MSL Rating / Peak Reflow||Package|
|SP3508CF-L||N||Y||Y||Y||Y||L3 / 260ᵒC||LQFP100|
|SP3508EF-L||N||Y||Y||Y||Y||L3 / 260ᵒC||LQFP100|
Click on the links above to download the Certificate of Non-Use of Hazardous Substances.
Parts & Purchasing
|Part Number||Pkg Code||Min Temp||Max Temp||Status||Suggested Replacement||Buy Now||Order Samples||PDN|
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.
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 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.