Smart Card Interface ICs

General Description

The 73S801R is a single smart card interface IC, compliant to the electrical requirements of ISO-7816-3 and EMV 4.0 (EMV2000) electrical specifications. It is controllable by an I2C bus, that makes it particularly suitable for applications that require several card interfaces, such as multiple SAM (Secure Access Modules) configurations in Point-of-Sales and payment terminals. For smart card reader applications traditionally using TDA8004 or TDA8002 type of devices, the Teridian 73S8010R and its I2C host interface is an advantageous replacement that requires fewer controller interface signals. It can be used in conjunction with any host microcontroller that can support the smart card protocol layer.

It is available either in a standard SO28 package, or in a 32-pin QFN package (5 x 5 x 0.8mm), making it the smallest solution available today in the market.

A significant advantage of the 73S8010R over existing IC solutions is the use of a Low Drop-Out (LDO) voltage regulator to generate the card power supply (VCC) from a nominal power supply source (VPC) of 5V (or 3V when using 3V cards only). Digital circuitry is separately powered by a digital power supply (VDD) typically 3.3V, which is independent from the 5V supply of the LDO regulator. The LDO exhibits improved noise performance when compared to typical step-up converter based ICs, which generate a lot of undesired noise and ripple causing problems when trying to comply with applicable standards. The LDO architecture also allows the 73S8010R to be the highest card current capable smart card interface IC available today in the market, with up to 90mA minimum provided to the card. Finally, the LDO regulator IC solution a with fewer external components makes the 73S8010R a more cost effective solution for high-volume smart card readers in consumer electronics applications such as set-top-boxes, digital TVs, or personal video recorders.


  • Card Interface
    Complies with ISO-7816-3 and EMV 4.0 and NDS Specifications
    Provides at least 90mA to the card
    LDO voltage regulator provides 3V / 5V to the card from an external power supply input
    ISO-7816-3 Activation / Deactivation sequencer
    Emergency card deactivation upon hardware fault:
  • Card removal
  • Voltage supervision faults: Detection of voltage drops on VCC (card), VDD (digital) and VPC (regulator) power supplies
  • Adjustable power supply (VDD) fault detection (2 resistors needed)
  • Card over-current (true current detection)
  • Die over-heating fault
    1 card detection input
    Auxiliary I/O lines, for C4 / C8 contact signals
  • System Controller Interface
    Fast mode, 400kbps I2C slave bus
    8 possible devices in parallel with different I2C addresses
    One control register and one status register
    Interrupt output to the host for fault detection
    3 Digital inputs control the card activation / deactivation, card reset and card voltage
    Digital inputs control the card clock (division rate and card clock stop modes)
    1 Digital output (interrupt) to the system controller, allows the system controller to monitor the card presence and faults
  • Power Supply
    LDO Regulator (VPC): 4.75V to 5.5V
    Digital Interfacing (VDD): 2.7V to 5.5V
  • ESD Protection on the card interface
  • Package: SO28 or 32QFN