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LTC4555 - SIM Power Supply and Level Translator

General Description

The LTC®4555 provides power conversion and signal level shifting needed for low voltage 2.5G and 3G cellular telephones to interface with 1.8V or 3V subscriber identity modules (SIMs).

The part meets all type approval requirements for 1.8V and 3V SIMs and smart cards.

Key Features

  • n SIM Power Supply: 1.8V/3V at 50mA n Input Voltage Range: 3V to 6V n Controller Voltage Range: 1.2V to 4.4V n 14kV ESD On All SIM Contact Pins n Meets All ETSI, IMT-2000 and ISO7816 SIM/Smart Card Interface Requirements n Level Translators to 1.8V or 3V n 20µA Operating Current n Logic-Controlled Shutdown (ISD < 1µA) n Available in a Low Profile, 16-Pin (3mm × 3mm) QFN Package.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LTC4555 SIM Power Supply and Level Translator Features n SIM Power Supply: 1.8V/3V at 50mA n Input Voltage Range: 3V to 6V n Controller Voltage Range: 1.2V to 4.4V n 14kV ESD On All SIM Contact Pins n Meets All ETSI, IMT-2000 and ISO7816 SIM/Smart Card Interface Requirements n Level Translators to 1.8V or 3V n 20µA Operating Current n Logic-Controlled Shutdown (ISD < 1µA) n Available in a Low Profile, 16-Pin (3mm × 3mm) QFN Package Applications n SIM Interface in 3G Cellular Telephones n Smart Card Readers Description The LTC®4555 provides power conversion and signal level shifting needed for low voltage 2.5G and 3G cellular telephones to interface with 1.8V or 3V subscriber identity modules (SIMs). The part meets all type approval requirements for 1.8V and 3V SIMs and smart cards.