DESCRIPTION
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 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. 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).

FEATURES
• Smart Card Interface:
 Smart card voltage VCC:
     o Selectable: 1.8V, 3V or 5V
     o Generated by an internal voltage regulator
     o Provides up to 65mA to 3V and 5V cards and up to 40mA to 1.8V cards
 ISO-7816-3 card emergency deactivation
 Voltage supervisor detects voltage drop on VCC (card supply)
 True card over-current detection 150mA max.
 1 input for a card presence detection switch
 Auxiliary I/O lines for synchronous and ISO-7816-12 USB card support
 Proper isolation of smart card signals depending on smart card type
 Card CLK clock frequency up to 20MHz
 6kV ESD and short circuit protection on the card interface
• System Controller Interface:
 Digital logic level: 3.3V
 5 signal images of the card signals (RSTIN, CLKIN, I/OUC, AUX1UC and AUX2UC)
 1 control signal to switch between synchronous / asynchronous and ISO-7816-12 USB smart card modes
 2 inputs activate and select the card voltage (CMDVCC% and CMDVCC#)
 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
 1 Chip Select input
 2 handshaking signals (OFF_REQ, OFF_ACK) for proper shutdown sequencing of all smart card signals
• ON/OFF Input for a Main System Switch
• DC-DC Step-up Converter:
 Generates an intermediary voltage VP
 Requires a single 10µH Inductor (rated for 400mA maximum peak current)
• VDD power supply output available to power up external circuitry: 3.3V ±0.3V, 40mA
• Industrial temperature range (-40 °C to +85 °C)
• Small format QFN32 package: 5x5mm
• RoHS compliant (6/6) lead-free package