NXP Semiconductors TDA8024
The TDA8024 is a complete and cost-efficient analog interface for asynchronous 3 V or 5 V smart cards. It can be placed between the card and the microcontroller to perform all supply, protection and control functions. The TDA8024AT is a direct replacement for the TDA8004AT.FEATURES AND BENEFITS
● IC card interface● 3 V or 5 V supply for the IC (VDD and GND)
● Three specifically protected half-duplex bidirectional buffered I/O lines to card contacts C4, C7 and C8
● DC-to-DC converter for VCC generation separately powered from a 5 V 20% supply (VDDP and PGND)
● 3 V or 5 V 5% regulated card supply voltage (VCC) with appropriate decoupling has the following capabilities:
● ICC < 80 mA at VDDP = 4 V to 6.5 V
● Handles current spikes of 40 nAs up to 20 MHz
● Controls rise and fall times
● Filtered overload detection at approximately 120 mA
● Thermal and short-circuit protection 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, VDD or VDDP drop-out
● Enhanced ESD protection on card side (>6 kV)
● 26 MHz integrated crystal oscillator
● Clock generation for cards up to 20 MHz (divided by 1, 2, 4 or 8 through CLKDIV1 and CLKDIV2 signals) wit...