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SMF24C データシート(PDF) 4 Page - Protek Devices |
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SMF24C データシート(HTML) 4 Page - Protek Devices |
4 / 5 page 4 www.protekdevices.com 05138.R8 6/05 SMF05C thru SMF24C APPLICATION NOTE 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. The SMFC Series are TVS arrays designed to protect I/O or data lines from the damaging effects of ESD or EFT. This product provides both unidirectional and bidirectional protection, with a surge capability of 100 Watts P PP per line for an 8/20µs waveshape and ESD protection > 25 kilovolts. UNIDIRECTIONAL COMMON-MODE CONFIGURATION (Figure 1) The SMFC Series provides up to four (4) lines of protection in a common-mode configuration as depicted in Figure 1. Circuit connectivity is as follows: ✔ Line 1 is connected to Pin 1. ✔ Line 2 is connected to Pin 3. ✔ Line 3 is connected to Pin 4. ✔ Line 4 is connected to Pin 6. ✔ Pin 2 is connected to ground. BIDIRECTIONAL DIFFERENTIAL-MODE CONFIGURATION (Figure 2) The SMFC Series provides up to five (5) lines of protection in a differential-mode configuration as depicted in Figure 2. Circuit connectivity is as follows: ✔ Line 1 is connected to Pin 1. ✔ Line 2 is connected to Pin 3. ✔ Line 3 is connected to Pin 4. ✔ Line 4 is connected to Pin 5. ✔ Line 5 is connected to Pin 6. ✔ Pin 2 is not connected. Figure 1 - Unidirectional Configuration Common-Mode I/O Port Protection 3 1 5 6 2 4 LINE 1 LINE 2 LINE 3 LINE 4 Figure 2 - Bidirectional Configuration Differential-Mode I/O Port Protection 3 1 5 6 2 4 LINE 1 LINE 2 LINE 3 LINE 4 LINE 5 |
同様の部品番号 - SMF24C |
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同様の説明 - SMF24C |
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