Smart Card Interface 16-Pin SO T/R

The TDA8034T/TDA8034AT is a cost-effective analog interface for asynchronous and synchronous smart cards operating at 5 V or 3 V. Using few external components, the TDA8034T/TDA8034AT provides all supply, protection and control functions between a smart card and the microcontroller.

• Integrated circuit smart card interface in an SO16 package
• 5 V or 3 V smart card supply
• One protected half-duplex bidirectional buffered I/O line (C7)
• V_CC regulation:
  • 5 V ± 5 % or 3 V ± 5 % using two low ESR multilayer ceramic capacitors: one of 220 nF and one of 470 nF
  • current spikes of 40 nA/s (V_CC = 5 V and 3 V) or 15 nA/s (V_CC =1.8 V) up to 20 MHz, with controlled rise and fall times and filtered overload detection of approximately 120 mA
• Thermal and short-circuit protection for all card contacts
• Automatic activation and deactivation sequences triggered by a short-circuit, card take-off, overheating, falling V_DD, V_DD(INTF) or V_DDP
• Enhanced card-side ElectroStatic Discharge (ESD) protection of > 6 kV
• External clock input up to 26 MHz connected to pin XTAL1
• Card clock generation up to 20 MHz using pin CLKDIV1 with synchronous frequency changes of:
  • ¹/₂ f_xtal or ¹/₄ f_xtal on TDA8034T
  • f_xtal or ¹/₂ f_xtal on TDA8034AT
• Non-inverted control of pin RST using pin RSTIN
• Compatible with ISO 7816, NDS and EMV 4.2 payment systems
• Supply supervisor for killing spikes during power on and off:
  • using a fixed threshold
  • using an external resistor bridge with threshold adjustment
• Built-in debouncing on card presence contacts (typically 4.5 ms)
• Multiplexed status signal using pin OFFN