SIM Card Power Supply Level Shifter

The FXLP4555 is a level-shifter analog circuit designed to translate the voltages between a SIM card and an external baseband. A built-in LDO-type DC-DC converter allows the FXLP4555 to drive 1.8V and 3.0V SIM cards. The device fulfills the ISO7816-3 smart-card interface standard as well as GSM 11.11 (11.12 and 11.18) and 3G mobile requirements (IMT-2000/3G UICC standard). The EN pin enables a low-current Shutdown Mode that extends battery life. The card power supply voltage (VCC_C) is selected using a single pin (VSEL).


  • Supports 1.8V or 3.0V SIM Cards
  • LDO Supplies >50mA Under 1.8V and 3.0V
  • Built-in Pull-up Resistor for I/O Pin in Both Directions
  • ESD Protection: 8kV (Human Body Model, According to ISO-7816 Specifications)
  • Supports Clock ≥5MHz
  • Supports "Clock Stop" Power Management per ISO7816-3 Specifications
  • Low-Profile 3x3mm MLP-16 Package
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Product Product &
Eco Status
Unit Price/
1K Order
Packing Method Convention Package Marking
FXLP4555MPX Full Production
Green as of Mar 2011

MLP 3x3 16L  -  Details
0.8 x 3 x 3mm,  TAPE REEL

PDF MLP 3x3 16L  Drawing
Last Update: Oct 2015 PDF MLP8L 3.0x3.0, Packing Drawing
Last Update: Oct 2015
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)

Line 2FXLP

Line 34555

FIT 0.9 @55°C
change temp

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260


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* Click here for further top mark packaging information for FXLP4555

This product is general usage and suitable for many different applications.
Application Note Description
AN-9740 PDFBi-Directional Translator Architectures
Last Update : 28-Jun-2014

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