73S8009C

The 73S8009C is controlled by the ON_OFF pin in the manner of a "push-on/push-off" button action. The OFF_REQ and OFF_ACK signals provide handshaking and control of the power "off" function by the controller. A SPST momentary switch to ground connected to ON_OFF is all that is required for power control. Alternatively, the "off" state can be initiated from the host controller through OFF_ACK. When the 73S8009C is "off," the current is less than 1 A. When power is supplied via the V BUS pin, the 73S8009C is unconditionally in the "power-on" state regardless of the action of the ON/OFF switch or OFF_ACK signal. Power supply current operating from the V BUS power when V CC is off is less than 500 A to conform to USB "SUSPEND" requirements. The Teridian 73S8009C is a versatile power management and single smart card interface circuit that is ideally suited for smart card reader products that are battery and/or USB bus-powered. In addition to its EMV 4.1 and ISO-7816-3 compliant smart card-to-host interface circuitry; it provides control, conversion, and regulation of power for a companion host processor circuit and power for the smart card. The 73S8009C can operate from a single 2.7 V to 6.5 V source supply, or a combination of battery power (4.0 V to 6.5 V) and USB power (4.4 V to 5.5 V). The 73S8009C supports 5 V, 3 V, and 1.8 V smart cards. The smart card signals for RST, CLK, IO, and auxiliary signals AUX1 and AUX2 are level-shifted to the selected V CC value. Although the host controller is required to handle the detailed signal timing for activation and de- activation under normal conditions, the 73S8009C blocks any spurious signals on CLK, RST and IO during power-up (as V CC rises) and power-down. The VBAT and VBUS pins provide inputs from alternate power sources as required. An internal switch in the 73S8009C acts as a single-pole, double-throw switch that selects either V BAT or V BUS to be connected to V PC. When the voltage on V BUS is zero, V BAT is connected to V PC. When voltage is applied to V BUS , the switch selects V BUS as the source for power. When power is supplied by V PC or V BAT. The 73S8009C contains two handshaking signals for the controller. OFF indicates that a card is present, and RDY indicates that V CC is at an acceptable value. The 73S8009C will perform emergency deactivation upon card removal, voltage faults, or over-current events The power management circuitry of the 73S8009C allows operation from a wide range of voltages from multiple sources. V PC is converted by using an inductive, step-up power converter to the intermediate voltage, V P. V P is used by linear voltage regulators and switches to create the voltages V DD and as required, V CC. V DD is used by the 73S8009C and is also made available for the companion controller circuit or other external circuits.

The absolute maximum ratings of 73S8009C are (1)complies with ISO-7816-3 and EMV 4.1 and derivative standards; (2)A DC-DC Converter provides 1.8 V/3 V/5 V to the card from a wide range of external power supply inputs; (3)provides up to 65 mA to the card; (4)ISO-7816-3 Card emergency deactivation sequencer; (5)2 voltage supervisors detect voltage drops on the V CC (card) and V DD (digital) power supplies; (6)card over-current detection 150 mA max.; (7)2 card detection inputs, 1 for either user polarity; (8)auxiliary I/O lines for synchronous and ISO-7816-12 USB card support; (9)card CLK clock frequency up to 20 MHz; (10)6 kV ESD and short circuit protection on the card interface; (11)5 signal images of the card signals (RSTIN, CLKIN, I/OUC, AUX1UC and AUX2UC); (12)2 inputs activate and select the card voltage (CMDVCC% and CMDVCC#); (13)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; (14)1 chip Select input; (15)2 handshaking signals for proper shutdown sequencing of all output supply voltages; (16)(OFF_REQ, OFF_ACK).

The features of 73S8009C can be summarized as (1)supply voltage V BUS: -0.5 to 6.6 VDC; (2)supply voltage V BAT: -0.5 to 6.6 VDC; (3)sup: ply voltag: e V PC: -0.5 to 6.6 VDC; (4)V DD: -0.5 to 4.0 VDC; (5)input voltage for digital inputs: -0.3 to (V DD +0.5) VDC; (6)storage temperature: -60 to 150°C; (7)pin voltage (except card interface): -0.3 to (V DD + 0.5) VDC; (8)pin voltage (card interface): -0.3 to (V CC + 0.3) VDC; (9)pin voltage, LIN pin: 0.3 to 6.5 VDC; (10)ESD tolerance card interface pins: +/- 6 kV; (11)ESD tolerance other pins: +/- 2 kV; (12)pin current, except LIN: ± 200 mA; (13)pin current, LIN : + 500 mA in, -200 mA out.