DIO74559

Version 1.1, Oct 2024

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© 2024 DIOO MICROCIRCUITS CO., LTD.

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The RST and CLK channels just contain single direction drivers without the holding mechanism of the I/O

channel, as these are just driven from the host to the SIM card side.

9.4. EMI filter

EMI filters at the input/output driver stages reduce interference to sensitive mobile communications.

9.5. ESD protection

The DIO74559 has strong ESD protections on all SIM card pins as well as on the VCCB pin. The feature prevents

any stress for the host: the voltage converter releases any stress to the supply floor.