73S8009CN Datasheet, PDF (1/30 Pages) Teridian Semiconductor Corporation – Combo ISO-7816 and USB Universal Smart Card Interface IC

Simplifying System Integration™
DS_8009C_026
73S8009CN
Combo ISO-7816 and USB Universal
Smart Card Interface IC
DATA SHEET
August 2009
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).
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. For more design flexibility,
the host processor is responsible for handling the
signal timing for smart card activation and de-
activation under normal conditions.
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 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.
FEATURES
• Smart Card Interface:
 Smart card voltage V_CC:
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
V_CC (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 V_P
 Requires a single 10µH Inductor (rated for
400mA maximum peak current)
• V_DD 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
Rev. 1.4
© 2009 Teridian Semiconductor Corporation
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