LTC4556

PRODUCTION

LTC4556

Smart Card Interface with Serial Control

PRODUCTION

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Features

Electrical Specifications Are ISO7816-3 and EMV Compatible
Control/Status Serial Port May be Daisy-Chained for Multicard Applications
Automatic Shutdown on Electrical Faults
Buck Boost Charge Pump Generates 5V, 3V or 1.8V Outputs (Smart Card Classes A, B and C)
Automatic Level Translation
Dynamic Pull-Ups Deliver Fast Signal Rise Times
Supervisory Functions Prevent Smart Card Faults
Low Operating Current: 250μA Typical
V_IN: 2.7V to 5.5V
Ultralow Shutdown Current
>10kV ESD on Smart Card Pins
Small 24-Lead 4mm × 4mm QFN Package

Additional Details

The LTC4556 provides all necessary power control, level translation and supervisory functions for a smart card or S.A.M. card interface. The part contains a low noise charge pump plus LDO for generating VCC power, as well as all necessary level shifting circuitry.

The card voltage can be set to either 1.8V, 3V or 5V. The LTC4556 includes a card detection channel with automatic debounce circuitry. To reduce wiring costs, the LTC4556 interfaces to a microcontroller via a simple 4‑wire serial interface. Multiple devices may be connected in daisy-chain fashion so that the number of wires to the card socket board is independent of the number of sockets. Status data is returned over the same interface.

Extensive security features ensure proper deactivation sequencing in the event of a supply fault or a smart card electrical fault. The smart card pins can withstand greater than 10kV ESD in-situ with no additional components. The LTC4556 is available in a small, low profile (0.75mm), 4mm × 4mm QFN package.

Applications

Handheld Payment Terminals
Pay Telephones
ATM Machines
POS Terminals
Computer Keyboards
Multiple S.A.M. Sockets

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 2

1ku List Price Starting From $2.53

Technical Documents 4

LTC4556: Smart Card Interface with Serial Control Data Sheet 02/12/2014

R527 Reliability Data 03/26/2018

DC564A - Demo Manual 09/24/2009

Smart Card Interfaces Made Easy 05/01/2004

Design Resources 2

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC4556EUF#PBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4556EUF#TRPBF	24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys