Obsolete

Product(s)

- Obsolete

Product(s)

Obsolete

Product(s)

- Obsolete

Product(s)

APPLICATION NOTE

13/24

The CLP270M is able to withstand all the first level AC power fault tests as required in the table 4-7 of

GR-1089-CORE standard, and then is suitable to protect the linecard.

As usual, for the second level AC power fault tests serial protection as PTC or fuse are needed.

All these curves, lightning and AC power fault represent the behavior of the CLP270M in worst case tests,

anyhow the CLP270M withstands all the others surges of the Bellcore GR1098 standard. For the second

level AC power fault test, the use of series protection elements (PTC or fuses) are needed.

The FS pin allows the system to monitor and record the number of surges occuring on the telecom line.

CONCLUSION

4

Ω

Ω

TIPL

TIPS

GND

1/2 CLP270M

50

SLIC

LCP1511D

-48V

V2

Rsense

Rp

V(RMS)

50 Hz

I1

Rs

Fig. 24: AC power fault test in Speech mode.

Fig. 25: Example of behavior when facing test 3

(400V, 600

Ω).

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of

use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by

implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to

change without notice. This publication supersedes and replaces all information previously supplied.

STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written ap-

proval of STMicroelectronics.

The ST logo is a registered trademark of STMicroelectronics

© 2000 STMicroelectronics - Printed in Italy - All rights reserved.

STMicroelectronics GROUP OF COMPANIES

Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia

Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.

http://www.st.com