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73S8024C Datasheet(PDF) 1 Page - Maxim Integrated Products |
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73S8024C Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 22 page  73S8024C Smart Card Interface Simplifying System Integration™ DATA SHEET April 2009 Rev. 1.3 © 2009 Teridian Semiconductor Corporation 1 DESCRIPTION The Teridian 73S8024C is a single smart card interface IC. It provides full electrical compliance with ISO-7816-3, EMV 4.0 and NDS specifications 1. Interfacing with the system controller is done through the control bus, composed of digital inputs to control the interface, and one interrupt output to inform the system controller of the card presence and faults. Data exchange with the card is managed from the system controller using the I/O line (and eventually the auxiliary I/O lines). Hardware support for auxiliary I/O lines, C4 / C8 contacts, is provided. The card clock signal can be generated by an on-chip oscillator using an external crystal or by connection to a clock signal coming from the system controller. The Teridian 73S8024C device incorporates an ISO-7816-3 activation/deactivation sequencer that controls the card signals. Level shifters drive the card signals with the selected card voltage (3 V or 5 V), coming from an internal DC-DC converter. With its high-efficiency DC-DC converter, the Teridian 73S8024C is a cost-effective solution for any smart card reader application to be powered from a single 2.7 V to 3.6 V power supply. Emergency card deactivation is initiated upon card extraction or upon any fault generated by the protection circuitry. The fault can be a VDD (digital power supply) or a VCC (card power supply) failure, a card over-current, or • The only smart card interface IC firmware compatible with the TDA8004 operating with a single 2.7 V to 3.6 V power supply (allows removal of 5 V from the system) an over-heating fault. ADVANTAGES • The inductor-based DC-DC converter provides higher current and efficiency than the usual charge-pump capacitor-based converters Ideal for battery-powered applications Suitable for high current cards and SAMs: (100 mA max) • Power down mode: 2 µA typical FEATURES • Card Interface: Complies with ISO-7816-3, EMV 4.0 and NDS 1 A DC-DC Converter provides 3V / 5V to the card from an external power supply input High-efficiency converter: > 80% @ VDD=3.3 V, VCC=5 V and ICC Up to 100 mA supplied to the card = 65 mA ISO-7816-3 Activation / Deactivation sequencer with emergency automated deactivation on card removal or fault detected by the protection circuitry Protection includes 2 voltage supervisors which detect voltage drops on card VCC and on VDD The V power supplies DD True over-current detection (150 mA max.) voltage supervisor threshold value can be externally adjusted 2 card detection inputs, 1 for each possible user polarity Auxiliary I/O lines, for C4/C8 contact signals Card clock up to 20 MHz • System Controller Interface: 3 Digital inputs control the card activation / deactivation, card reset and card voltage 4 Digital inputs control the card clock (division rate and card clock stop modes) 1 Digital output, interrupt to the system controller, allows the system controller to monitor the card presence and faults. Crystal oscillator or host clock, up to 27 MHz • Power Supply: VDD • Power Down mode 2.7 V to 3.6 V • 6 kV ESD Protection on the card interface • Package: SO28 APPLICATIONS • Set-Top-Boxes , DVD / HDD Recorders • Point of Sales and Transaction Terminals • Control Access and Identification 1 Pending NDS approval. |
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