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NXP Semiconductors
PESD9X5.0L; PESD9X7.0L
Unidirectional ESD protection diodes
7. Application information
The PESD9X5.0L and the PESD9X7.0L are designed for the protection of one
unidirectional data or signal line from the damage caused by ESD and surge pulses.
Both devices may be used on lines where the signal polarities are either positive or
negative with respect to ground. The devices provide a surge capability of 150 W
per line for an 8/20 μ s waveform.
line to be protected
(positive signal polarity)
PESD9X5.0/7.0L
GND
line to be protected
(negative signal polarity)
PESD9X5.0/7.0L
GND
unidirectional protection of one line
006aac498
Fig 9.
Application diagram
Circuit board layout and protection device placement
Circuit board layout is critical for the suppression of ESD, Electrical Fast Transient (EFT)
and surge transients. The following guidelines are recommended:
1. Place the device as close to the input terminal or connector as possible.
2. The path length between the device and the protected line should be minimized.
3. Keep parallel signal paths to a minimum.
4. Avoid running protected conductors in parallel with unprotected conductors.
5. Minimize all Printed-Circuit Board (PCB) conductive loops including power and
ground loops.
6. Minimize the length of the transient return path to ground.
7. Avoid using shared transient return paths to a common ground point.
8. Ground planes should be used whenever possible. For multilayer PCBs, use ground
vias.
8. Test information
8.1 Quality information
This product has been qualified in accordance with the Automotive Electronics Council
(AEC) standard Q101 - Stress test qualification for discrete semiconductors , and is
suitable for use in automotive applications.
PESD9XXL_SER
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 16 December 2010
? NXP B.V. 2010. All rights reserved.
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