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NXP Semiconductors
PESD5V0L2UU; PESD6V0L2UU
Low capacitance unidirectional ESD protection diodes
7. Application information
PESD5V0L2UU and PESD6V0L2UU are designed for the protection of up to two
unidirectional data or signal lines, or for the protection of one bidirectional data or signal
line, from the damage caused by ESD. For unidirectional protection, the devices may be
used on lines where the signal polarities are positive with respect to ground, and for
bidirectional protection, the devices may be used on lines where the signal polarities are
both, positive and negative with respect to ground.
For an 8/20 μ s waveform, the PESD5V0L2UU provides a surge capability of up to 70 W
per line, and the PESD6V0L2UU provides a surge capability of up to 60 W per line.
line 1 to be protected
DUT
GND
bidirectional protection
of one line
line 1 to be protected
line 2 to be protected
DUT
GND
unidirectional protection
of two lines
006aab252
Fig 8.
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 devices 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.
PESD5V0L2UU_PESD6V0L2UU_1
? NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 11 March 2009
8 of 13
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