Low-Power IC Card Interface


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Product Details


  • I²C-bus controlled IC card interface in TSSOP28
  • Supply voltage from 2.7 V to 6.5 V
  • Independant supply voltage VDD(INTF) for interface signals with the microcontroller
  • Shutdown input for very low power consumption when the part is not used
  • Power reduction modes when the card is active
  • DC-to-DC converter for VCC generation (capacitive doubler, tripler, or inductive, or follower automatically selected according to supply voltage and card voltage)
  • 1 specific protected half duplex bidirectional buffered I/O line, with current limitation at ±15 mA, maximum frequency 1 MHz
  • 2 auxiliary card I/O lines controlled by I²C-bus (C4 and C8)
  • VCC regulation: 5 V, 3 V or 1.8 V ±8%, ICC< 55 mA, current spikes of 40 nAs up to 20 MHz, with controlled rise and fall times, filtered overload detection approximately 80 mA, current limitation about 120 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, VDD or VDD(DCDC) drop-out
  • Enhanced ElectroStatic Discharge (ESD) protection on card side (> 6 kV)
  • 20 MHz clock input
  • Clock generation for the card up to 10 MHz (CLKIN divided by 1, 2, 4 or 5) with synchronous frequency changes; stop HIGH or LOW or free running 1 MHz in cards Low-power mode; current limitation on pin CLK (C3)
  • RST signal (C2) with current limitation at 20 mA, controlled by an embedded programmable CLK pulse counter on asynchronous cards or by a register on synchronous cards
  • ISO 7816-3, GSM 11.11 and EMVCo 4.3 compatibility
  • Supply voltage supervisor for spike killing during power-on and emergency deactivation at power-off: threshold internally fixed or set via an external resistor bridge; pulse width internally fixed or set via an external capacitor
  • Card presence input with 10 ms built-in debouncing system
  • One interrupt signal INT


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