The ST8034HN and ST8034HC devices are complete low-cost analog interfaces for asynchronous and synchronous smartcards operating at a supply voltage of 5 V, 3 V or 1.8 V. The ST8034HN and ST8034HC devices can be placed between the card and the microcontroller to provide all supply, protection, detection and control functions, with just a few external components.
●Key Features
● Complete smartcard interface
● ISO 7816, NDS and EMV 4.3 payment systems compatible
● Three protected half-duplex bidirectional buffered I/O lines to the smartcard
● 5 V, 3 V or 1.8 V supply voltage for the smartcard (VCC ), pin-selectable. Ensures controlled VCC rise and fall times and provides smart overload detection with glitch immunity.
● Very low power consumption in deep shutdown mode
● Chip select function allows the device interface to be isolated from the microcontroller signals - allows parallel combination of the card interface devices (ST8034HC)
● Card clock generation by integrated crystal oscillator or from external clock source
● Card clock frequency up to 20 MHz, programmable by CLKDIV1 and CLKDIV2 pins (ST8034HN) or by CLKDIV pin (ST8034HC), with synchronous frequency changes
● Automatic activation and deactivation sequences initiated by the microcontroller
● Emergency deactivation sequences initiated by a card supply short-circuit, card take-off, falling VDD , VDDP , or VDD(INTF) or by the interface device overheating
● Voltage supply supervisors
● with a fixed threshold (VDD , VDDP )
● with an external resistor divider to set the VDD(INTF) threshold (PORADJ pin)
● Multipurpose card status signalOFF
● Non-inverted card reset pin RST driven by the RSTIN input
● Thermal and short-circuit protection of all card contacts
● Card presence detection contacts debounced
● Enhanced card side ESD protection of 8 kV
● Space saving QFN24 4 x 4 x 0.8 mm package
● Temperature range -25 to +85 °C
