TDA8005A

` Smart card supply (5 and 3 V ±5%, 20 mA maximum with controlled rise and fall times)
` Smart card clock generation (up to 8 MHz), with two times synchronous frequency doubling
` Clock STOP HIGH, clock STOP LOW or 1.25 MHz (from internal oscillator) for cards power-down mode
` Specific UART on I/O for automatic direct/inverse convention settings and error management at character level
` Automatic activation and deactivation sequences through an independent sequencer
`Supports the protocol T = 0 in accordance with ISO 7816 GSM11.11 requirements (Global System for Mobile communication); approved for Final GSM11.11 Test Approval (FTA)
` Several analog options are available for different applications: doubler or tripler DC-to-DC converter, card presence, active HIGH or LOW, threshold voltage supervisor, etc.
` Overloads and take-off protections
` Current limitations in the event of short-circuit
` Special circuitry for killing spikes during power-on or off
` Supply supervisor
` Step-up converter (supply voltage from 2.5 to 6 V)
` Power-down and sleep mode for low power consumption
` Enhanced ElectroStatic Discharge (ESD) protections on card side (6 kV minimum)
` Control and communication through a standard RS232 full-duplex interface
` Optional additional I/O ports for:
keyboard
LEDs
display
etc.
` P80CL51 microcontroller core with 4-kbyte ROM and 256-byte RAM.

The TDA8005A is a low-cost card interface for portable smart card readers. Controlled through a standard serial interface, it takes care of all ISO 7816 and GSM11.11 requirements for both 5 and 3 V cards. It gives the card and the set a very high level of security, due to its special hardware against ESD, short-circuiting, power failure, etc.

Its integrated step-up converter TDA8005A allows operation within a supply voltage range of 2.5 to 6 V.

The very low power consumption in power-down and sleep modes saves battery power.

Development tools, application report and support (hardware and software) are available.