TDA8024
Standard smart card interface
Rev. 4.0 — 3 June 2016
Product data sheet
1. General description
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. Very few external components are required. The
TDA8024AT is a direct replacement for the TDA8004AT.
More information can be obtained from the NXP internet site (www.nxp.com) and from
“Application note AN10141”.
CAUTION
This device is sensitive to ElectroStatic Discharge (ESD). Observe precautions for handling
electrostatic sensitive devices.
Such precautions are described in the ANSI/ESD S20.20, IEC/ST 61340-5, JESD625-A or
equivalent standards.
2. 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) with synchronous frequency changes
Non-inverted control of RST via pin RSTIN
ISO 7816, GSM11.11 and EMV (payment systems) compatibility
