PESD1FLEX NXP Semiconductors, PESD1FLEX Datasheet - Page 7

• Manufacturer Part Number: PESD1FLEX
• Description: PESD1FLEX in a small SOT23 (TO-236AB) Surface-Mounted Device (SMD) plasticpackage designed to protect two automotive FlexRay bus lines from the damage causedby ElectroStatic Discharge (ESD) and other transients
• Manufacturer: NXP Semiconductors

NXP Semiconductors
7. Application information
PESD1FLEX_2
Product data sheet
The PESD1FLEX is designed for the protection of two automotive FlexRay data lines from
the damage caused by ESD and surge pulses. The device supports a FlexRay data rate
of 10 Mbit/s. The PESD1FLEX provides a surge capability of up to 200 W per line for an
8/20 s waveform.
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 PESD1FLEX as close to the input terminal or connector as possible.
2. The path length between the PESD1FLEX and the protected line should be
3. Keep parallel signal paths to a minimum.
4. Avoid running protection conductors in parallel with unprotected conductors.
5. Minimize all Printed-Circuit Board (PCB) conductive loops including power and
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
Fig 8. Typical application: ESD protection of two automotive FlexRay bus lines
minimized.
ground loops.
vias.
TRANSCEIVER
Rev. 02 — 15 February 2008
FlexRay
BM
BP
mode choke
(optional)
common
C G
R T/2
R T/2
2
FlexRay bus ESD protection diode
3
1
PESD1FLEX
FlexRay
006aab053
bus
PESD1FLEX
© NXP B.V. 2008. All rights reserved.
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