PESDXS1UL_SER

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© NXP B.V. 2011. All rights reserved.

Product data sheet

Rev. 3 — 25 October 2011

9 of 15

NXP Semiconductors

PESDxS1UL series

Unidirectional ESD protection diodes

7.

Application information

The PESDxS1UL series is designed for protection of one unidirectional data line from the

damage caused by ESD and surge pulses. The PESDxS1UL series may be used on lines

where the signal polarities are either positive or negative with respect to ground. The

PESDxS1UL series provides a surge capability of 150 W 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 PESDxS1UL as close to the input terminal or connector as possible.

2. The path length between the PESDxS1UL 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.

8.

Test information

8.1 Quality information

This product has been qualified in accordance with the Automotive Electronics Council

(AEC) standard Q101 - Stress test qualification for discrete semiconductors, and is

suitable for use in automotive applications.

Fig 10. Application diagram

006aaa681

ground

line to be protected

(positive signal polarity)

PESDxS1UL

unidirectional protection of one line

ground

line to be protected

(negative signal polarity)

PESDxS1UL