ESD/EMI Device Protects Smartphone SIM Card Interfaces

 

The EClamp™2465T from Semtech Corporation is a combination EMI filter and line termination device with integrated TVS diodes for use on SIM card interfaces on cellular phones and other portable electronics. This device utilizes solid-state silicon-avalanche technology for superior clamping performance and DC electrical characteristics and a bidirectional EMI/RFI filter with integrated TVS for ESD protection. 

The device consists of three circuits that include series impedance matching resistors for proper termination of the SIM card interface. Termination resistor value of 100 ohms is included on the Reset and Data lines and 47 ohms on the CLK line. TVS diodes are also included on each line for ESD protection in excess of ±15 kV (air discharge) and ±8 kV (contact discharge) per IEC 61000-4-2, Level 4. An additional TVS diode connection is included for protection of the voltage (V_cc) bus. The EClamp2465T is in an 8-pin, RoHS/WEEE compliant SPL171P8T package and measures 1.7 x 1.3 mm with a nominal height of 0.4 mm. Find more product information on the Semtech website.

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