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STMicroelectronics ST8024L Smartcard Interface ICs

STMicroelectronics ST8024L Smartcard Interface ICs are a complete analog interface for asynchronous Class A, B, and C smartcards. These ICs can be placed between the card and the microcontroller with few external components to perform all supply protection and control functions. STMicroelectronics ST8024L Smartcard Interface ICs are compatible with the ST8024 (with the exception of Vth[ext] rise/fall value). These devices are designed to be compatible with the NDS conditional access system as well as the ISO 7816, GSM11.11 and EMV 4.2 payment systems.

Features

  • Designed to be compatible with the NDS conditional access system (except ST8024LTR)
  • ISO 7816, GSM11.11 and EMV 4.2 (payment systems) compatible
  • 3V or 5V supply for the ST8024L device (VDD)
  • Three specifically protected half-duplex bidirectional buffered I/O lines to card contacts C4, C7 and C8
  • Step-up converter for VCC generation separately powered by a 5V ± 20% supply (VDDP and PGND)
  • 1.8V ± 6.5%, 3V or 5V ± 5% regulated card supply voltage (VCC) with appropriate decoupling has the following capabilities:
    • ICC <80mA at VDDP = 4.75V to 6.5V
    • Handles current spikes of 40nA up to 20MHz
    • Controls rise and fall times
    • Filtered overload detection at ~120mA
  • 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 dropout
  • Enhanced ESD protection on card side (>6kV)
  • 26MHz integrated crystal oscillator
  • Built-in debounce on card presence contacts
  • One multiplexed status signal OFF
  • Non-inverted control of RST via pin RSTIN
  • Clock generation for cards up to 20MHz (divided by 1, 2, 4 or 8 through CLKDIV1 and CLKDIV2 signals) with synchronous frequency changes
  • Supply supervisor for spike-killing during power-on and power-off and power-on reset (threshold fixed internally or externally by a resistor divider)

Applications

  • Smartcard readers for set-top boxes
  • IC card readers for banking, identification, or pay TV

Additional Resource

Published: 2012-03-12 | Updated: 2022-03-11