General description
The TDA8007BHL is a cost-effective card interface for dual smart card readers.

FEATUREs and benefits
■ Control and communication through an 8-bit parallel interface, compatible with non-multiplexed memory access, TDA8007BHL/C3 can be also addressed through a multiplexed memory access
■ Specific ISO UART with parallel access input/output for automatic convention processing, variable baud rate through frequency or division ratio programming, error management at character level for T = 0 and extra guard time register
■ FIFO for 1 to 8 characters in reception mode
■ Parity error counter in reception mode and in transmission mode with automatic re-transmission
■ Dual VCC generation: 5 V ± 5 %, 65 mA (max.); 3 V ± 8 %, 50 mA (max.) or 1.8 V ± 10 %, 30 mA (max.); with controlled rise and fall times
■ Dual cards clock generation (up to 10 MHz), with three times synchronous frequency doubling (fXTAL, 1⁄2fXTAL, 1⁄4fXTAL and 1⁄8fXTAL)
■ Cards clock stop (at high or low level) 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 EMV4.2
■ Versatile 24-bit time-out counter for Answer To Reset (ATR) and waiting times processing
■ Specific Elementary Time Unit (ETU) counter for Block Guard Time (BGT): 22 in T = 1 and 16 in T = 0
■ Minimum delay between two characters in reception mode:
    – in Protocol T = 0: 11.8 ETU
    – in Protocol T = 1: 10.8 ETU
■ Supports synchronous cards
■ Current limitations in the event of short-circuit (pins I/O1, I/O2, VCC1, VCC2, RST1 and RST2)
■ Special circuitry for killing spikes during power-on/power-off
■ Supply supervisor for power-on/power-off reset
■ Step-up converter (supply voltage from 2.7 V to 6 V), doubler, tripler or follower according to VCC and VDD
■ Additional input/output 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 three 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 (except C4x, C8x): 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 multiprocessor applications (EMV banking, digital pay TV and access control, etc.).