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NXP Semiconductors
PESD5V0S1UJ; PESD12VS1UJ
Unidirectional ESD protection for transient voltage suppression
8. Application information
PESD5V0S1UJ and PESD12VS1UJ are designed for the protection of one unidirectional
data or signal line from the damage caused by ESD and transient overvoltage.
The devices may be used on lines where the signal polarities are either positive or
negative with respect to ground.
The PESD5V0S1UJ provides a surge capability of 890 W and the PESD12VS1UJ
provides a surge capability of 600 W per line for an 8/20 μ s waveform.
line to be protected
(positive signal polarity)
DUT
GND
line to be protected
(negative signal polarity)
DUT
GND
unidirectional protection of one line
006aab251
Fig 9.
Application diagram
Circuit board layout and protection device placement
Circuit board layout is critical for the suppression of ESD and Electrical Fast
Transient (EFT). 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.
PESD5V0S1UJ_PESD12VS1UJ_1
? NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 3 June 2009
9 of 14
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