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LTC4558EUD +BOM

Smart Card Interface 10MHz 2.5V 20-Pin QFN EP

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LTC4558EUD General Description

The LTC4558 provides the power conversion and signal level translation needed for advanced cellular telephones to interface with 1.8V or 3V subscriber identity modules (SIMs). The device meets all requirements for 1.8V and 3V SIMs and 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. A channel select pin determines which channel is open for communication. Separate enable pins for each channel allow both cards to be powered at once and allow for faster transition from one channel to the other.Internal level translators allow controllers operating with supplies as low as 1.4V to interface with 1.8V or 3V Smart Cards. Battery life is maximized by a low operating current of 65μA and a shutdown current of less than 1μA. Board area is minimized by the low pro? le 3mm × 3mm × 0.75mm leadless QFN package.

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Key Features

  • Power Management and Control for Two SIM Cards or Smart Cards
  • Independent 1.8V/3V V
  • CC
  • Supports Simultaneous Powering of Both Cards
  • Fast Channel Switching
  • Automatic Level Translation
  • Dynamic Pull-Ups Deliver Fast Signal Rise Times*
  • Built-In Fault Protection Circuitry
  • Automatic Activation/Deactivation Sequencing Circuitry
  • Low Operating/Shutdown Current
  • Meets EMV Fault Tolerance Requirements
  • Low Pro? le 20-Lead (3mm × 3mm) QFN Package
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Application

  • GSM, TD-SCDMA and other 3G+ Cellular Phones
  • Wireless Point-of-Sale Terminals
  • Multiple SIM Card Interfaces
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Specifications

Product Category: ADI
Deactivation Sequence Product Package 1

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LTC4558EUD Datasheet PDF

Preliminary Specification LTC4558EUD PDF Download

LTC4558EUD PDF Preview

In Stock: 7,527

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