PESDXS5UD_SER NXP Semiconductors, PESDXS5UD_SER Datasheet - Page 8

• Manufacturer Part Number: PESDXS5UD_SER
• Description: Fivefold ElectroStatic Discharge (ESD) protection diode arrays in a SOT457 (SC-74) smallSurface-Mounted Device (SMD) plastic package designed to protect up to five signal linesfrom the damage caused by ESD and other transients
• Manufacturer: NXP Semiconductors

NXP Semiconductors
7. Application information
PESDXS5UD_SER_2
Product data sheet
The PESDxS5UD series is designed for the protection of up to five unidirectional data
lines from the damage caused by ESD and surge pulses. The PESDxS5UD series may be
used on lines where the signal polarities are both, positive and negative with respect to
ground. The PESDxS5UD series provides a surge capability of 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 PESDxS5UD as close to the input terminal or connector as possible.
2. The path length between the PESDxS5UD and the protected line should be
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
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 10. Application diagram
minimized.
ground loops.
vias.
unidirectional protection of 5 lines
1
2
3
PESDxS5UD
Rev. 02 — 7 December 2006
6
5
4
bidirectional protection of 4 lines
PESDxS5UD series
1
2
3
Fivefold ESD protection diode arrays
PESDxS5UD
6
5
4
© NXP B.V. 2006. All rights reserved.
high-speed
data lines
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