NUP1301U_15 Datasheet, PDF (8/14 Pages) NXP Semiconductors – Ultra low capacitance ESD protection array

NXP Semiconductors
NUP1301U
Ultra low capacitance ESD protection array
8. Application information
Protection of a single (high-speed) data line in rail-to-rail configuration. The protected data
line is connected to pin 3. Pin 1 is connected to ground (GND) and pin 2 is connected to
the supply rail (supply voltage V_CC). When the transient voltage exceeds the forward
voltage drop of one diode, the transient is directed either to the supply rail or to GND.
The advantages of these solutions are: low line capacitance (0.6 pF typically), fast
response time, and low clamping voltage.
V_CC
V_CC
Audio
interface
D1
NUP1301U
D2
NUP1301U
006aac518
Fig 8. Typical application for the protection of one signal line
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 NUP1301U as close to the input terminal or connector as possible.
2. The path length between the NUP1301U 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.
9. Test information
9.1 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.
NUP1301U
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 28 January 2011
© NXP B.V. 2011. All rights reserved.
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