CM1214 Datasheet, PDF (6/10 Pages) List of Unclassifed Manufacturers – 1 and 2 Channel PicoGuardTM AC Signal ESD Protector

PRELIMINARY
CM1214
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.
RF ANTENNA
CL
GND
SIGNAL LINE
ESD
SWITCH
N.C.
ESD
3-Lead DFN or SOT23-3
LNA
PA
Figure 6. Typical Application - RF Switch and Amplifier Protection,
CM1214-01ST/SO/DF/DE in 3-lead DFN or SOT23
TX+
I/O1
I/O2
TX-
I/O3
RX+
I/O4
RX-
CM1214-02MS
Figure 7. Typical Application - Ethernet Protection, CM1214-02MS/MR in 8-lead MSOP
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