LTC4556 Smart Card Interface with Serial Control Fea T Descrip T n Electrical Specifications Are ISO7816-3 and EMV The LTC 4556 provides all necessary power control, level Compatible translation and supervisory functions for a smart card or n Control/Status Serial Port May be Daisy-Chained S.A.M. card interface. The part contains a low noise charge for Multicard Applications pump plus LDO for generating V power, as well as all CC n Automatic Shutdown on Electrical Faults necessary level shifting circuitry. n Buck Boost Charge Pump Generates 5V, 3V or 1.8V The card voltage can be set to either 1.8V, 3V or 5V. The Outputs (Smart Card Classes A, B and C) LTC4556 includes a card detection channel with automatic n Automatic Level Translation debounce circuitry. To reduce wiring costs, the LTC4556 n Dynamic Pull Ups Deliver Fast Signal Rise Times interfaces to a microcontroller via a simple 4wire serial n Supervisory Functions Prevent Smart Card Faults interface. Multiple devices may be connected in daisy chain n Low Operating Current: 250A Typical fashion so that the number of wires to the card socket n V : 2.7V to 5.5V IN board is independent of the number of sockets. Status n Ultralow Shutdown Current data is returned over the same interface. n >10kV ESD on Smart Card Pins n Extensive security features ensure proper deactivation Small 24 Lead 4mm 4mm QFN Package sequencing in the event of a supply fault or a smart card a T electrical fault. The smart card pins can withstand greater than 10kV ESD in situ with no additional components. n Handheld Payment Terminals The LTC4556 is available in a small, low profile (0.75mm), n Pay Telephones 4mm 4mm QFN package. n ATM Machines L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n POS Terminals ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6356140, 6411531. n Computer Keyboards n Multiple S.A.M. Sockets Typical a T 240k 180k 20 Deactivation Sequence UNDERV 1 19 DV PRES CC 10 V BATT INPUT POWER 0.1F 1F LTC4556 18 RST 8 C8 GND 5V/DIV 17 C4 16 6 I/O FAULT 15 CLK RST 21 14 5V/DIV D CLK IN 22 13 SMART CARD 4-WIRE V D OUT CC 23 COMMAND SCLK 1F I/O INTERFACE 24 LD 5V/DIV 4556 TA01 V 2 CC DATA 5V/DIV 3 4-WIRE R IN 4556 G11.eps 10s/DIV CARD 4 SYNC INTERFACE 5 ASYNC + C C CPO 11 9 12 1F 1F 4556fb 1 For more information www.linear.com/LTC4556 ion pplica ions pplica ion uresLTC4556 a Te Maxi Mu M r a T p in c F T (Note 1) V , DV , CPO, FAULT, TOP VIEW BATT CC UNDERV to GND ....................................... 0.3V to 6.0V PRES, DATA, R , SYNC, ASYNC, IN 24 23 22 21 20 19 LD, D , SCLK to GND ................ 0.3V to (DV + 0.3V) IN CC DV 1 18 C8 I/O, CLK ........................................0.3V to (V + 0.3V) CC CC DATA 2 17 C4 I (Note 5) ............................................................65mA CC R 3 16 I/O IN 25 V Short Circuit Duration ............................... Indefinite CC SGND SYNC 4 15 RST Operating Temperature Range (Note 4)....40C to 85C ASYNC 5 14 CLK Storage Temperature Range .................. 65C to 125C FAULT 6 13 V CC 7 8 9 10 11 12 UF PACKAGE 24-LEAD (4mm 4mm) PLASTIC QFN T = 125C, = 160C/W JMAX JA EXPOSED PAD (PIN ) IS GND, MUST BE SOLDERED TO PCB o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4556EUF PBF LTC4556EUF TRPBF 4556 24 Lead (4mm x 4mm) Plastic QFN 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: