TDA8004AT

· 3 or 5 V supply for the IC (GND and V_DD)
· Step-up converter for V_CC generation (separately powered with a 5 V ±10% supply, VDDP and PGND)
· 3 specific protected half duplex bidirectional buffered I/O lines (C4, C7 and C8)
_· V_CC regulation (5 or 3 V ±5% on 2 ×100 nF or 1 ×100 nF and 1 ×220 nF multilayer ceramic capacitors with low ESR, I_CC < 65 mA at 4.5 V < V_DDP < 6.5 V, current spikes of 40 nAs up to 20 MHz, with controlled rise and fall times, filtered overload detection approximately 90 mA)
· Thermal and short-circuit protections on all card contacts
· Automatic activation and deactivation sequences (initiated by software or by hardware in the event of a short-circuit, card take-off, overheating or supply drop-out)
· Enhanced ESD protection on card side (>6 kV)
· 26 MHz integrated crystal oscillator
· Clock generation for the card up to 20 MHz (divided by 1, 2, 4 or 8 through CLKDIV1 and CLKDIV2 signals) with synchronous frequency changes
· Non-inverted control of RST via pin RSTIN
· ISO 7816, GSM11.11 and EMV (payment systems) compatibility
· Supply supervisor for spikes killing during power-on and power-off
· One multiplexed status signal OFF.

The TDA8004AT is a complete low cost analog interface for asynchronous 3 or 5 V smart cards. It can be placed between the card and the microcontroller with very few external components to perform all supply protection and control functions.