Multiple Smart Card Slot Interface

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Product Details


  • I²C-bus controlled IC card interface in a TFBGA64 package
  • Supply voltage between 2.7 V and 5.5 V
  • Dedicated microcontroller interface supply voltage (VDD(INTF))
  • Shutdown mode ensures very low power consumption when the TDA8026 is inactive
  • Programmable power reduction modes triggered when the card slots are inactive
  • VCC(n) generation via DC-to-DC converter: two card slots can be fully loaded, the three others in reduced consumption mode
  • Two clock input pins: CLKIN1 for card slot 1 and CLKIN2 for card slots 2 to 5
  • Two transparent I/O lines on microcontroller side, one for card slot 1 and the other for card slots 2 to 5
  • Five protected, half-duplex, bidirectional, buffered I/O lines with current limitation at ± 15 mA and a maximum frequency 1 MHz
  • Two I²C-bus controlled auxiliary I/O lines
  • VCC(n) regulation on all card slots at ICC ≤ 55 mA:
    • 5 V, 3 V or 1.8 V ± 5 %
    • Current spikes of 40 nAs up to 20 MHz for 5 V cards with controlled rise and fall times
    • Current limitation of approximately 100 mA
  • Thermal protection and short-circuit protection on all card contacts
  • Automatic activation and deactivation sequences initiated by the software or hardware in the event of a short-circuit, card take-off or voltage drop-out for VDD(INTF), VDD or VUP
  • Enhanced ElectroStatic Discharge (ESD) protection on the card-side up to 6 kV
  • 20 MHz clock input
  • Card clock generation up to 20 MHz and dividable by 1, 2, 4 or 5 with synchronous frequency changes:
    • Stop, HIGH or LOW
    • Clock frequency between 1 MHz and 2.2 MHz in card low-power mode
    • Current limitation on pin CLK(n)
  • RST(n) signal lines with current limitation at 20 mA, controlled by an embedded programmable clock pulse counter on asynchronous cards or by a register on synchronous cards
  • ISO 7816-3 and EMV 4.3 payment systems compatibility
  • VDD(INTF) supply voltage supervisor ensures correct communication between microcontroller and circuit; threshold internally fixed or set using an external resistor bridge
  • VDD supply voltage supervisor for spike suppression during power-on and emergency deactivation at power-off; threshold internally fixed
  • Card presence input with a 17.8 ms (typical) built-in debouncing system on card slots 1 and 2
  • One interrupt signal (IRQN)

Part numbers include: TDA8026ET.


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