Datasheet Summary
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Features s s
LTC1955 Dual Smart Card Interface with Serial Control DESCRIPTIO
The LTC®1955 provides all necessary supervisory and power control functions for two smart cards, two S.A.M. cards or a bination of S.A.M. and smart cards. It provides a charge pump for battery powered applications as well as all necessary level shifting circuitry. The card voltages can be independently set to 1.8V, 3V or 5V. Both card interfaces include a card detection channel with automatic debounce circuitry. To reduce wiring costs, the LTC1955 interfaces to a microcontroller via a simple 4-wire serial interface. Multiple devices may be connected in daisy-chain fashion so that the...