73S8023C Smart Card Interface Simplifying System Integration DATA SHEET April 2009 DESCRIPTION FEATURES The Teridian 73S8023C is a low-power, high efficiency, Card Interface: single smart card interface IC suitable for 3V and 5V Complies with ISO-7816-3, EMV 4.0 cards. It provides full electrical compliance with ISO- A DC-DC Converter provides 3V / 5V to the card 7816-3 and EMV 4.0 (EMV2000) specifications. from an external power supply input Hardware support for any type of synchronous cards High-efficiency converter: > 80% V =3.3 V, DD (memory cards) is provided. V =5 V and I = 65 mA CC CC Up to 100 mA supplied to the card Interfacing with the system controller is done through the ISO-7816-3 Activation / Deactivation sequencer control bus composed of digital inputs to control the with emergency automated deactivation interface, and one interrupt output to inform the system controller of the card presence and faults. Data exchange Protection includes 2 voltage supervisors which with the card is managed from the system controller using detect voltage drops on card V and on V CC DD the I/O line (and eventually the auxiliary I/O lines). power supply The V voltage supervisor threshold value can be DD A chip select input allows multiple 73S8023C ICs to share externally adjusted the same control bus. When chip select is set low, the True over-current detection (150 mA max.) host microcontroller inputs are latched and outputs are taken to a high impedance state. 2 card detection inputs, 1 for either possible switch configuration The card clock signal can be generated by an on-chip Full support of synchronous cards oscillator using an external crystal or by connecting an external clock signal. System Controller Interface: 3 Digital inputs control the card activation / The 73S8023C device incorporates an ISO-7816-3 deactivation, card reset and card voltage activation/deactivation sequencer that controls the card signals. Emergency card deactivation is initiated upon 3 Digital inputs control the card clock (division rate card extraction or upon any fault generated by the and card clock source selection) protection circuitry. 1 Digital output, interrupt to the system controller, allows the system controller to monitor the card The 73S8023C requires only a single 2.7 V to 3.6 V power presence and faults supply, and features a high-efficiency embedded DC-DC 1 Power down digital input (places the 73S8023C converter. This architecture, plus a Power Down digital in a very low-power mode (card deactivated) input that allow placing the IC in a very low-power mode 1 Chip select digital input for parallel operation of making the 73S8023C particularly suitable for low-power several 73S8023C ICs. applications (cell-phones, PDAs, payphones, hand-held 1 External clock input (STROBE), used for POS terminals). synchronous operation 1 Digital output clock, buffered version of signal on ADVANTAGES XTALIN Supports both synchronous and asynchronous smart Crystal oscillator or host clock (XTALIN), up to cards 27 MHz Replacement for TDA8002, with up to 600 mW in Power Supply: V 2.7 V to 3.6 V DD power savings ( EMV ICCmax condition) The inductor-based DC-DC converter provides higher 6 kV ESD Protection on the card interface current and efficiency Ideal for battery-powered applications APPLICATIONS Suitable for high current cards and SAMs: (100 mA Point of Sales and Transaction Terminals max) Payphones Single 2.7 V to 3.6 V power supply allows removal Set-Top-Boxes, DVD / HDD Recorders of 5 V from the system Payment card interfaces in portable devices (PDAs, Power down mode: 2 A typical mobile phones) Package: Small Format (5x5mm) 32-QFN Rev. 1.5 2009 Teridian Semiconductor Corporation 1 73S8023C Data Sheet DS 8023C 019 FUNCTIONAL DIAGRAM VDD VDDF ADJ LIN VDD 3 20 17 2 6 6 4 NC 21 1 I FAULT CC VDD VOLTAGE SUPERVISOR GND GND VOLTAGE REFERENCE VDD FAULT V FAULT CC 12 DC-DC GND CONVERTER 5 15 PWRDN VCC R-C 8 CS OSC. ICC RESET 14 18 CMDVCC BUFFER DIGITAL RST Int Clk CIRCUITRY 19 RSTIN & 31 FAULT LOGIC ICC CLOCK 5V/3V 13 22 BUFFER CLK OFF 29 25 CLKDIV1 STROBE 30 16 ISO-7816-3 CLKDIV2 CLKSEL SEQUENCER 7 23 XTALIN PRES XTAL CLOCK 6 24 OSC PRES GENERATION XTALOUT OVER 32 TEMP CLKOUT TEMP FAULT 9 26 I/O IOUC 11 ICC I/O BUFFERS 27 AUX1 AUX1UC 10 28 AUX2 AUX2UC Figure 1: 73S8023C Block Diagram 2 Rev. 1.5