73S8023C

www.DataSheet4U.com 73S8023C Smart Card Interface Simplifying System Integration™ DATA SHEET April 2009 DESCRIPTION The Teridian 73S8023C is a low-power, high efficiency, single smart card interface IC suitable for 3V and 5V cards. It provides full electrical compliance with ISO7816-3 and EMV 4.0 (EMV2000) specifications. Hardware support for any type of synchronous cards (memory cards) is provided. 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). A chip select input allows multiple 73S8023C ICs to share the same control bus. When chip select is set low, the host microcontroller inputs are latched and outputs are taken to a high impedance state. The card clock signal can be generated by an on-chip oscillator using an external crystal or by connecting an external clock signal. The 73S8023C device incorporates an ISO-7816-3 activation/deactivation sequencer that controls the card signals. Emergency card deactivation is initiated upon card extraction or upon any fault generated by the protection circuitry. The 73S8023C requires only a single 2.7 V to 3.6 V power supply, and features a high-efficiency embedded DC-DC converter. This architecture, plus a Power Down digital input that allow p...