LTC1755EGN#TRPBF Analog Devices

LTC1755/LTC1756 Smart Card Interface FEATURES DESCRIPTIO n The LTC 1755/LTC1756 universal Smart Card interfaces Fully ISO 7816-3 and EMV Compliant (Including Auxiliary I/O Pins) are fully compliant with ISO 7816-3 and EMV specifica- n Buck-Boost Charge Pump Generates 3V or 5V tions. The parts provide the smallest and simplest inter- n face circuits between a host microcontroller and general 2.7V to 6.0V Input Voltage Range (LTC1755) n Very Low Operating Current: 60m A purpose Smart Cards. n >10kV ESD on All Smart Card Pins An internal charge pump DC/DC converter delivers regu- n Dynamic Pull-Ups Deliver Fast Signal Rise Times lated 3V or 5V to the Smart Card, while on-chip level n Soft-Start Limits Inrush Current at Turn On shifters allow connection to a low voltage controller. All n 3V 5V Signal Level Translators Smart Card contacts are rated for 10kV ESD, eliminating n Shutdown Current: <1m A the need for external ESD protection devices. n Short-Circuit and Overtemperature Protected Input voltage may range from 2.7V to 6.0V, allowing direct n Alarm Output Indicates Fault Condition connection to a battery. Internal soft-start mitigates start- n Multiple Devices May Be Paralleled for up problems that may result when the input power is Multicard Applications (LTC1755) provided by another regulator. Multiple devices may be n Available in 16- and 24-Pin SSOP Packages paralleled and connected to a single controller for multicard U applications. APPLICATIO S Battery life is maximized by 60m A operating current and n Handheld Payment Terminals 1m A shutdown current. The narrow SSOP packages mini- n Pay Telephones mize PCB area for compact portable systems. n ATMs , LTC and LT are registered trademarks of Linear Technology Corporation. n Key Chain Readers n Smart Card Readers TYPICAL APPLICATIO 3.3V SMART CARD PRESENT SWITCH 1 24 PRES 5V/3V 2 23 PWR CARD 3 22 CS ALARM 4 21 NC/NO READY 5 20 C2 GND DV CC C3 10m F 6 19 10m F m CONTROLLER V LTC1755 C IN C1 7 18 + 0.68m F GND V V C CC CC 8 17 AUX1 AUX1 AUX1IN 9 16 AUX2 AUX2 AUX2IN SMART CARD 10 15 I/O I/O DATA 11 14 RST RST RIN 12 13 CLK CLK CIN 17556 TA01 1 U ULTC1755/LTC1756 ABSOLUTE AXI U RATI GS (Note 1) V to GND (LTC1755) ............................. 0.3V to 6.5V CLK, RST, I/O, AUX1, IN V to GND (LTC1756) ............................. 0.3V to 6.0V AUX2 to GND.............................. 0.3V to V + 0.3V IN CC DV to GND (LTC1755).......................... 0.3V to 5.5V V Short-Circuit Duration............................... Indefinite CC CC V to GND .............................................. 0.3V to 5.5V Operating Temperature Range (Note 2) .. 40 C to 85 C CC Digital Inputs to GND Storage Temperature Range ................ 65 C to 150 C (LTC1755) .............................. 0.3V to DV + 0.3V Lead Temperature (Soldering, 10 sec)................. 300 C CC Digital Inputs to GND (LTC1756) ................................. 0.3V to V + 0.3V IN UUW PACKAGE/ORDER I FOR ATIO TOP VIEW ORDER PART ORDER PART NUMBER NUMBER 1 24 5V/3V PRES TOP VIEW 2 23 CARD PWR LTC1755EGN LTC1756EGN 3 22 ALARM CS PRES 1 16 5V/3V 4 21 READY NC/NO PWR 2 15 CARD 5 20 DV GND CC GND 3 14 READY 6 19 C V IN V 4 13 C IN + + 7 18 C V CC V 5 12 C CC 8 17 AUX1IN AUX1 I/O 6 11 DATA PART MARKING 9 16 AUX2IN AUX2 RST 7 10 RIN 10 15 DATA I/O CLK 8 9 CIN 1756 11 14 RIN RST GN PACKAGE 12 13 CIN CLK 16-LEAD NARROW PLASTIC SSOP T = 125 C, q = 135 C/W JMAX JA GN PACKAGE 24-LEAD NARROW PLASTIC SSOP T = 125 C, q = 150 C/W JMAX JA Consult factory for Industrial and Military grade parts. 2 U WWW