LTC4557 - LTC4557是Dual SIM/Smart Card Power Supply and Interface

LTC4557是LINEAR凌力尔特公司的一款SIM 接口产品，LTC4557是LTC4557是Dual SIM/Smart Card Power Supply and Interface，本站介绍了LTC4557的封装应用图解、特点和优点、功能等，并给出了与LTC4557相关的LINEAR元器件型号供参考。

LTC4557 - LTC4557是Dual SIM/Smart Card Power Supply and Interface - SIM 接口 - 接口器件 - 凌力尔特

LTC4557 - Dual SIM/Smart Card Power Supply and Interface

LTC4557 - Dual SIM/Smart Card Power Supply and Interface - Linear Technology（凌力尔特）

功能描述

The LTC4557 provides power conversion and signal level translation needed for 2.5G and 3G cellular telephones to interface with 1.8V or 3V subscriber identity modules (SIMs). The part meets all requirements for 1.8V and 3V SIMs. The part contains LDO regulators to power 1.8V or 3V SIM cards from a 2.7V to 5.5V input. The output voltages can be set using the two voltage selection pins and up to 50mA of load current can be supplied.

Internal level translators allow controllers operating with supplies as low as 1.2V to interface with 1.8V or 3V smart cards. Battery life is maximized by a low operating current of less than 100μA and a shutdown current of less than 1μA. Board area is minimized by the low profile 3mm x 3mm x 0.75mm leadless QFN package.

*U.S. Patent No. 6,356,140

特点

Power Management and Signal Level Translators for Two SIM Cards or Smart Cards

Independent 1.8V/3V VCC Control for Both Cards

Automatic Level Translation

ISO7816, ETSI and EMV Compatible

Dynamic Pull-Ups Deliver Fast Signal Rise Times*

Built-In Fault Protection Circuitry

Automatic Activation/Deactivation Sequencing Circuitry

Low Operating/Shutdown Current

>10kV ESD on SIM Card Pins

Compatible with EMV Fault Tolerance Requirements