The Teridian 73S8024RN is a low-cost smart card interface IC that meets the ISO-7816-3, EMV 4.0, and NDS specifications. It can be controlled by a dedicated control bus and provides card presence and fault notification to the system controller. The card clock can be generated by an on-chip oscillator using an external crystal or a clock signal. The 73S8024RN includes an ISO-7816-3 activation/deactivation sequencer that controls the card signals. Level-shifters drive the card signals with the selected card voltage (3V or 5V) from an internal Low Drop-Out (LDO) voltage regulator. With its embedded LDO regulator, the 73S8024RN is a cost-effective solution for applications with a 5V power supply. Hardware support for auxiliary I/O lines, C4 / C8 contacts, is provided. Emergency card deactivation is initiated upon card extraction or any fault generated by the protection circuitry.