73S8024C

www.DataSheet4U.com 73S8024C Smart Card Interface Simplifying System Integration™ DATA SHEET April 2009 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 specifications1. 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 V DD (digital power supply) or a V CC (card power supply) failure, a card over-current...