Chapter 382

Single interface chip controls two smart cards

Steven Martin


The LTC1955, a dual smart card interface that provides all of the required power management, control, ESD and fault detection circuitry for two smart cards, is described.


Smart card interface



There are considerable challenges to smart card interfacing, including various voltage levels (both input and output) and stringent fault handling requirements. To produce a robust card reading system, designers must comply with extensive and often difficult software as well as hardware standards. Furthermore, there are other complications like in-circuit ESD and pin-to-pin shorts to contend with.

The LTC1955 dual smart card interface ...

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