The ST8024L is a complete low-cost analog interface for asynchronous Class A, B, and C smartcards. It can be placed between the card and the microcontroller with few external components to perform all supply protection and control functions. The ST8024LCDR and ST8024LCTR are compatible with the ST8024 (with the exception of Vth(ext)rise/fallvalue).Designed to be compatible with the NDS conditional access system (except ST8024LTR)ISO 7816, GSM11.11 and EMV 4.2 (payment systems) compatibleIC card interface3 V or 5 V supply for the ST8024L device (VDD)Three specifically protected half-duplex bi-directional buffered I/O lines to card contacts C4, C7 and C8Step-up converter for VCCgeneration separately powered by a 5 V ± 20% supply (VDDPand PGND)1.8 V ± 6.5%, 3 V or 5 V ± 5% regulated card supply voltage (VCC) with appropriate decoupling has the following capabilities:ICC< 80 mA at VDDP= 4.75 to 6.5 VHandles current spikes of 40 nA up to 20 MHzControls rise and fall timesFiltered overload detection at ~120 mAThermal and short-circuit protection on all card contactsAutomatic activation and deactivation sequences; initiated by software or by hardware