ISDN

S-Interface

Remote

Power

DC/DC

Converter

U-Interface

TISP4145M3BJR-S

TISP4145M3BJR-S

Data

Voice

MF-RX018/250-0

MF-RX018/250-0

TISP4145M3BJR-S

TISP4145M3BJR-S

MF-RX018/250-0

MF-RX018/250-0

The schematic above illustrates the application protection and does not constitute the complete circuit design.

Customers should verify actual device performance in their specific applications.

TISP4145M3BJR-S

MF-RX018/250-0

COPYRIGHT© 2011 • BOURNS, INC. • 08/11 • e/CPK1067 • “PortNote”is a registered service mark of Bourns, Inc.

“Bourns”and“Multifuse”are registered trademarks of Bourns, Inc. in the U.S. and other countries.

Solution Products

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

Fax +1-951 781-5700

Fax +41-(0)41 768 55 10

Compliance

ITU-T K.21

Alternate Recommendations

For GR-1089-CORE designs, the TISP4145H3 and

B1250T are recommended.

Benefit

This solution provides a high level of protection

within a small amount of PCB area.

Objective

Integrated Services Digital Network

(ISDN) simultaneously transmits voice,

video, and data over public switched

telephone network circuits. This solution

protects ISDN circuit interfaces against

surge and power contact threats.

Solution

4 Thyristors: TISP4145M3BJR-S

4 Multifuse® PTCs: MF-RX018/250-0

PN-DESIGNKIT 10

Design Kit