Interface SIM Interface
Power Management Inductorless (Charge Pump) DC/DC Converters Regulated Step-Up Charge Pumps
 Power Management Inductorless (Charge Pump) DC/DC Converters Regulated Buck-Boost Charge Pumps

LTC1755 - Smart Card Interface

Features

  • Fully ISO 7816-3 and EMV Compliant (Including Auxiliary I/O Pins)
  • Buck-Boost Charge Pump Generates 3V or 5V
  • 2.7V to 6.0V Input Voltage Range (LTC1755)
  • Very Low Operating Current: 60µA
  • >10kV ESD on All Smart Card Pins
  • Dynamic Pull-Ups Deliver Fast Signal Rise Times
  • Soft-Start Limits Inrush Current at Turn On
  • 3V - 5V Signal Level Translators
  • Shutdown Current: <1µA
  • Short-Circuit and Overtemperature Protected
  • Alarm Output Indicates Fault Condition
  • Multiple Devices May Be Paralleled for Multicard Applications (LTC1755)
  • Available in 16- and 24-Pin SSOP Packages

Typical Application

LTC1755 Typical Application

Description

The LTC1755/LTC1756 universal Smart Card interfaces are fully compliant with ISO 7816-3 and EMV specifications. The parts provide the smallest and simplest interface circuits between a host microcontroller and general purpose Smart Cards.

An internal charge pump DC/DC converter delivers regulated 3V or 5V to the Smart Card, while on-chip level shifters allow connection to a low voltage controller. All Smart Card contacts are rated for 10kV ESD, eliminating the need for external ESD protection devices.

Input voltage may range from 2.7V to 6.0V, allowing direct connection to a battery. Internal soft-start mitigates start-up problems that may result when the input power is provided by another regulator. Multiple devices may be paralleled and connected to a single controller for multicard applications.

Battery life is maximized by 60µA operating current and 1µA shutdown current. The narrow SSOP packages minimize PCB area for compact portable systems.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LTC1755EGN#PBF SSOP-24 GN E 05-08-1641 (GN24) Yes
LTC1755EGN#TRPBF SSOP-24 GN E 05-08-1641 (GN24) Yes


Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LTC1755EGN#PBF SSOP-24 E $2.95 $2.55 Yes
LTC1755EGN#TRPBF SSOP-24 E $2.65 Yes
Buy Now • Request Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Handheld Payment Terminals
  • Pay Telephones
  • Key Chain Readers
  • Smart Card Readers

People Who Viewed This Product Also Viewed

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support