GENERAL DESCRIPTION
The TDA8007B is a low cost card interface for dual smart card readers. Controlled through a parallel bus, it takes care of all ISO 7816, EMV and GSM11-11 requirements.

FEATURES
• Control and communication through an 8-bit parallel interface, compatible with multiplexed or non-multiplexed memory access
• Specific ISO UART with parallel access on I/O for automatic convention processing, variable baud rate through frequency or division ratio programming, error management at character level for T = 0, extra guard time register
• 1 to 8 characters FIFO in reception mode
• Parity error counter in reception mode
• Dual VCC generation (5 V ±5%, 65 mA (max.) or 3 V ±8%, 50 mA (max.) with controlled rise and fall times)
• Dual cards clock generation (up to 10 MHz), with two times synchronous frequency doubling
• Cards clock STOP HIGH, clock STOP LOW or 1.25 MHz (from internal oscillator) for cards Power-down mode
• Automatic activation and deactivation sequence through an independent sequencer
• Supports the asynchronous protocols T = 0 and T = 1 in accordance with ISO 7816 and EMV
• Versatile 24-bit time-out counter for Answer To Reset (ATR) and waiting times processing
• 22 Elementary Time Unit (ETU) counter for Block Guard Time (BGT)
• Supports synchronous cards
• Current limitations in the event of short-circuit
• Special circuitry for killing spikes during power-on/-off
• Supply supervisor for power-on/-off reset
• Step-up converter (supply voltage from 2.7 to 6 V), doubler, tripler or follower according to VCC and VDD
• Additional I/O pin allowing use of the ISO UART for another analog interface (pin I/OAUX)
• Additional interrupt pin allowing detection of level toggling on an external signal (pin INTAUX)
• Fast and efficient swapping between the 3 cards due to separate buffering of parameters for each card
• Chip select input allowing use of several devices in parallel and memory space paging
• Enhanced ESD protections on card side [6 kV (min.)]
• Software library for easy integration within the application
• Power-down mode for reducing current consumption when no activity.

APPLICATIONS
• Multiple smart card readers for multiprotocol applications (EMV banking, digital pay TV, access control, etc.).