Negative Battery Voltage SLIC Protection ITU-T Solution Solution Products Objective Compliance e STh LIC (Subscriber Line Interface ITU-T Basic K.20, K.21, K.45. Circuit) provides all the BORSCHT 230 V , 23 A, 900 seconds withstand. rms functions such as battery, ringing and 600 V , 1 A, 0.2 seconds withstand. rms supervision between the codec and Increased surge withstand to 4 kV 10/700 s TBU-PL085-200-WH telephone hand set. This PortNote without a primary protector. solution discusses negative battery voltage solutions against surge and Alternate Recommendations power contact threats. Other PortNote Solutions: Dual Supply Voltage SLIC Protection - ITU-T Solution Solution Negative Battery Voltage SLIC Protection - 1 TBU High-Speed Protector: GR-1089-CORE Intra-building Solution TBU-PL085-200-WH SLIC Protection - GR-1089-CORE Intra-building Solution 2 MOV Devices: MOV-10D391K MOV-10D391K Benefit This solution provides a high level of protection in a small PCB area. GND V DD SLIC Tip Tip MOV-10D391K RJ11 SLIC TBU-PL085-200-WH* MOV-10D391K SLIC Design Kit Ring Ring V SS -V BAT e sTh chematic above illustrates the application protection and does not constitute the complete circuit design. Customers should verify actual device performance in their specic afi pplications. *Note: The VE950 series (e.g. Le9500, Le9520, Le9530, Le9540) require a 200 mA I TBU High-Speed trigger PN-DESIGNKIT-42 Protector for normal operation. All other SLICs may use 100 mA I TBU HSP devices. REV 10/12 trigger Bourns PortNote solutions provide protection Americas: Tel +1-951 781-5500 recommendations for typical port threats. Fax +1-951 781-5700 Europe: Tel +41-(0)41 768 55 55 Asia-Pacific: Tel +886-2 256 241 17 For more information, go to: Fax +41-(0)41 768 55 10 Fax +886-2 256 241 16 www.bourns.com COPYRIGHT 2012 BOURNS, INC. 10/12 e/CPK1235 PortNote is a registered service mark of Bourns, Inc. or email: protection bourns.com Bourns and TBU are registered trademarks of Bourns, Inc. in the U.S. and other countries.