PESDXL2BT_SER_2

© NXP B.V. 2009. All rights reserved.

Product data sheet

Rev. 02 — 25 August 2009

10 of 14

NXP Semiconductors

PESDxL2BT series

Low capacitance double bidirectional ESD protection diodes in SOT23

7.

Application information

The PESDxL2BT series is designed for the protection of two bidirectional signal lines from

the damage caused by ESD and surge pulses. The PESDxL2BT series may be used on

lines where the signal polarities are above and below ground. The PESDxL2BT series

provides a surge capability of up to 350 W per line for an 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 PESDxL2BT as close to the input terminal or connector as possible.

2. The path length between the PESDxL2BT 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 10. Application diagram

006aaa163

GND

PESDxL2BT

line 2 to be protected

line 1 to be protected