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Product data sheet

Rev. 01 — 26 October 2004

7 of 12

Philips Semiconductors

PESD1LIN

LIN bus ESD protection diode in SOD323

7.

Application information

The PESD1LIN is designed for protection of one LIN bus signal line from the damage

caused by ElectroStatic Discharge (ESD) and surge pulses. The PESD1LIN provides a

surge capability of up to 160 W per line for a 8/20

µs 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 protection device as close to the input terminal or connector as possible.

2. The path length between the protection device and the protected line should be

minimized.

3. Keep parallel signal paths to a minimum.

4. Avoid running protection conductors in parallel with unprotected conductor.

5. Minimize all printed-circuit board 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 printed-circuit

boards, use ground vias.

Fig 6.

Typical application: ESD protection of one automotive LIN bus line.

006aaa167

ground

PESD1LIN

24 V

15 V

line to be protected