73S8009CN

The 73S8009CN is ideally suited for applications such as desktop computers, laptops and general purpose smart card readers that require low power operation from a single 2.7V to 6.5V power supply voltage source. A power down mode ("OFF" mode) is available and exhibits a 10nA typical current consumption. The circuit provides control, conversion and regulation of power for the smart card. The 73S8009CN features an ON/OFF pin suitable to connect to a "push-on/push-off" main system switch. When the 73S8009CN is "OFF," the typical current drawn from VPC is 10nA. For applications that do not implement any ON/OFF system switch, the ON/OFF input pin can be driven from a digital output of the host processor. For more design flexibility, the host processor is responsible for handling the signal timing for smart card activation and deactivation under normal conditions. In addition, the circuit provides a 3.3V-regulated voltage that is used as an internal digital supply voltage to the host interface. It is also made available to supply power to some external circuitry (a host controller for instance). For asynchronous and synchronous smart card operation, the signals for RST, CLK, I/O and auxiliary signals AUX1 and AUX2 are directly controlled from the host processor and are level-shifted by the circuit to the selected V CC value. The Teridian 73S8009CN is the world's first single-chip smart card electrical interface circuit that supports all types of smart cards: 5V, 3V and 1.8V, including traditional ISO-7816-3 asynchronous and synchronous type 1 and type 2, as well as USB, ISO-7816-12 cards. The power management circuitry allows operation from a single power supply source V PC (2.7V to 6.5V). V PC is converted using an inductive, step-up power converter to the intermediate voltage, V P. V P is used by linear voltage regulators and switches internal to the IC to create the voltages V DD and as required, V CC. V DD is used by the 73S8009CN and is also made available for the companion host processor circuit or for other external circuits.

The features of 73S8009CN can be summarized as (1)smart card voltage V CC : selectable: 1.8V, 3V or 5V, generated by an internal voltage regulator, provides up to 65mA to 3V and 5V cards and up to 40mA to 1.8V cards; (2)ISO-7816-3 card emergency deactivation; (3)voltage supervisor detects voltage drop on V CC (card supply); (4)true card over-current detection 150mA max.; (5)1 input for a card presence detection switch; (6)auxiliary I/O lines for synchronous and ISO-7816-12 USB card support; (7)proper isolation of smart card signals depending on smart card type; (8)card CLK clock frequency of the 73S8009CN up to 20MHz; (9)6kV ESD and short circuit protection on the card interface; (10)digital logic level: 3.3V; (11)5 signal images of the card signals (RSTIN, CLKIN, I/OUC, AUX1UC and AUX2UC); (12)1 control signal to switch between synchronous / asynchronous and ISO-7816-12 USB smart card modes; (13)2 inputs activate and select the card voltage (CMDVCC% and CMDVCC#); (14)2 outputs, interrupt to the system controller (OFF and RDY), to inform the system controller of the card presence / faults and status of the interface; (15)1 chip select input; (16)2 handshaking signals (OFF_REQ, OFF_ACK) for proper shutdown sequencing of all smart card signals; (17)ON/OFF Input for a main system switch; (18)generates an intermediary voltage V P; (19)requires a single 10H Inductor (rated for 400mA maximum peak current); (20)V DD power supply output available to power up external circuitry: 3.3V ±0.3V, 40mA; (21)industrial temperature range (-40 °C to +85 °C); (22)small format QFN32 package: 5x5mm; (23)RoHS compliant (6/6) lead-free package:

The absolute maximum ratings of 73S8009CN are (1)supply voltage V PC: -0.5 to 7.0 VDC; (2)V DD: -0.5 to 4.0 VDC; (3)input voltage for Digital Inputs: -0.3 to (V DD +0.5) VDC; (4)storage temperature: -65 to 150°C; (5)pin voltage (except card interface): -0.3 to (V DD + 0.5) VDC; (6)pin voltage (card interface): -0.3 to (V CC + 0.3) VDC; (7)pin voltage, LIN pin: 0.3 to 6.5 VDC; (8)ESD tolerance card interface, DP and DM pins: +/- 6kV; (9)ESD tolerance other pins: +/- 2kV; (10)Pin current, except LIN: ± 200 mA; (11)Pin current, LIN: + 500 mA in, -200 mA out.