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PESD3V3V4UG Datasheet(PDF) 7 Page - NXP Semiconductors |
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PESD3V3V4UG Datasheet(HTML) 7 Page - NXP Semiconductors |
7 / 11 page 9397 750 14479 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Product data sheet Rev. 02 — 7 April 2005 7 of 11 Philips Semiconductors PESDxV4UG series Very low capacitance quadruple ESD protection diode arrays 7. Application information The PESDxV4UG series is designed for protection of up to four unidirectional data lines from the damage caused by ESD and surge pulses. The PESDxV4UG series may be used on lines where the signal polarities are above or below ground. The PESDxV4UG series provides a surge capability of 16 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 PESDxV4UG as close to the input terminal or connector as possible. 2. The path length between the PESDxV4UG 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 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 8. Application diagram 5 Unidirectional protection of 4 lines Bidirectional protection of 3 lines n.c. 4 3 2 1 PESDxV4UG 006aaa018 5 Data- or transmission lines 4 3 2 1 PESDxV4UG |
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