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PSOT03LC-T13 Datasheet(PDF) 4 Page - Protek Devices |
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PSOT03LC-T13 Datasheet(HTML) 4 Page - Protek Devices |
4 / 5 page PSOT03LC thru PSOT36LC 4 05066.R6 3/07 www.protekdevices.com The PSOTxxLC Series are low capacitance TVS arrays designed to protect I/O or data lines from the damaging effects of ESD or EFT. This product series provides unidirectional & bidirectional protection, with a surge capability of 500 Watts P PP per line for an 8/20µs waveform and ESD protection > 40 kilovolts. BIDIRECTIONAL COMMON-MODE CONFIGRUATION (Figure 1) Two PSOTxxLC devices, when used in paralell, provide protection in a common-mode configuration as depicted in Figure 1. Circuit connectivity is as follows: ✔ I/O Line is connected to Device 1, Pin 1. ✔ I/O Line is connect to Device 2, Pin 2. ✔ Device 1, Pin 2 is connected to ground. ✔ Device 2, Pin 1 is connected to ground. ✔ Device 1 & 2, Pin 3 is not connected. BIDIRECTIONAL DIFFERENTIAL-MODE CONFIGRUATION (Figure 1) In addition, two PSOTxxLC devices, when used in paralell, provide protection in a differential-mode configuration for Ethernet applications as depicted in Figure 2. Circuit connectivity is as follows: ✔ I/O Line 1 is connected to Device 1, Pin 1. ✔ I/O Line 1 is connect to Device 2, Pin 2. ✔ I/O Line 2 is connected to Device 1, Pin 1. ✔ I/O Line 2 is connect to Device 2, Pin 2. ✔ Device 1 & 2, Pin 3 is not connected. CIRCUIT BOARD LAYOUT RECOMMENDATIONS Circuit board layout is critical for Electromagnetic Compatibility (EMC) protection. The following guidelines are recommended: ✔ The protection device should be placed near the input terminals or connectors, the device will divert the transient current immediately before it can be coupled into the nearby traces. ✔ The path length between the TVS device and the protected line should be minimized. ✔ All conductive loops including power and ground loops should be minimized. ✔ The transient current return path to ground should be kept as short as possible to reduce parasitic inductance. ✔ Ground planes should be used whenever possible. For multilayer PCBs, use ground vias. Figure 1 - Common-Mode I/O Port Protection 3 1 2 3 1 2 I/O LINE GND Figure 2 - Differential-Mode Ethernet Protection 3 1 2 3 1 2 I/O 1 I/O 2 APPLICATION NOTE |
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