73S8009CN
Combo ISO-7816 and USB Universal
Smart Card Interface IC
Simplifying System Integration™
DS_8009C_026
DATA SHEET
August 2009
FEATURES
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.
•
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
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Rev. 1.4
© 2009 Teridian Semiconductor Corporation
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TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
