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