PESD5V0U1BA_BB_BL_1 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 01 — 25 April 2007 6 of 12
NXP Semiconductors
PESD5V0U1BA/BB/BL
Ultra low capacitance bidirectional ESD protection diodes
7. Application information
The PESD5V0U1Bx series is designed for the bidirectional protection of one signal line
from the damage caused by ESD pulses. The PESD5V0U1Bx series may be used on
lines where the signal polarities are either positive or negative with respect to ground.
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 PESD5V0U1Bx as close to the input terminal or connector as possible.
2. The path length between the PESD5V0U1Bx 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.
Fig 5. Bidirectional protection of one line
006aab038
PESD5V0U1Bx
GND
signal line
