CM1454

CM1454 Data Port EMI Filter Array with ESD Protection Description The CM1454 is an EMI filter array with ESD protection in a CSP form factor for the data port of a mobile handset. The CM1454−08 is configured in an 8 channel format and combines both resistor−capacitor (R−C) and inductor−capacitor (L−C) filters in the chip. There are five C−R−C filters with component values of 30 pF − 100 W − 30 pF which are used for the microphone and data ports. There are also three C−L−C filters with values of 80 pF − 3 nH − 80 pF which are designed for the stereo speaker port. The CM1454’s C−RC filters have a cut−off frequency of 60 MHz and an attenuation of better than 35 dB over the 800 MHz to 2.7 GHz frequency range. The C−L−C filters have a cut−off frequency of 21 MHz with an attenuation of 40 dB at 1 GHz. The parts integrate ESD protection diodes on every pin that provide a very high level of protection for sensitive electronic components against possible electrostatic discharge (ESD). The ESD protection diodes connected to the filter ports are designed and characterized to safely dissipate ESD strikes of ±15 kV, which is beyond the Level 4 requirement of the IEC61000−4−2 international standard. In accordance with MIL−STD−883 (Method 3015) specification for Human Body Model (HBM) ESD, the pins are also protected for contact discharges at greater than ±30 kV. The CM1454 incorporates OptiGuardt which results in improved reliability at assembly. The CM1454 is available in a space saving...