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CM1214-02MS Datasheet(PDF) 6 Page - List of Unclassifed Manufacturers |
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CM1214-02MS Datasheet(HTML) 6 Page - List of Unclassifed Manufacturers |
6 / 10 page © 2005 California Micro Devices Corp. All rights reserved. 6 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.calmicro.com 03/25/05 CM1214 PRELIMINARY Application Information The CM1214-01ST/SO and the CM1214-01DF/DE protect a single bipolar signal line, such as is found in RF circuits. One I/O pin (pin 1 for example) is con- nected to the signal line to be protected, and the other I/O pin is tied to GND. It is important to have a solid ground connection in order to reduce the clamping volt- age. Pin 3 of the 3-lead SOT23 (Pin 1 of the 3-lead DFN) must be left open (not connected on the PCB). The CM1214-02MS/MR protects two bipolar lines, such as for Gbit Ethernet. The PCB traces underneath the package connect across to the corresponding pins, i.e., pin 1 to pin 8 etc. Any disturbance on the line above or below the stand- off voltage is clamped. Figure 6. Typical Application - RF Switch and Amplifier Protection, CM1214-01ST/SO/DF/DE in 3-lead DFN or SOT23 Figure 7. Typical Application - Ethernet Protection, CM1214-02MS/MR in 8-lead MSOP 3-Lead DFN or SOT23-3 C L SIGNAL LINE GND SWITCH LNA PA RF ANTENNA ESD ESD N.C. I/O1 I/O2 I/O3 I/O4 TX+ TX- RX+ RX- CM1214-02MS |
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