73S8023C
Smart Card Interface
Simplifying System Integration™
DATA SHEET
April 2009
DESCRIPTION
FEATURES
The Teridian 73S8023C is a low-power, high efficiency,
single smart card interface IC suitable for 3V and 5V
cards. It provides full electrical compliance with ISO-
7816-3 and EMV 4.0 (EMV2000) specifications.
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Card Interface:
. Complies with ISO-7816-3, EMV 4.0
. A DC-DC Converter provides 3V / 5V to the card
from an external power supply input
Hardware support for any type of synchronous cards
(memory cards) is provided.
. High-efficiency converter: > 80% @ VDD=3.3 V,
VCC=5 V and ICC = 65 mA
. Up to 100 mA supplied to the card
Interfacing with the system controller is done through the
control bus; composed of digital inputs to control the
interface, and one interrupt output to inform the system
controller of the card presence and faults. Data exchange
with the card is managed from the system controller using
the I/O line (and eventually the auxiliary I/O lines).
. ISO-7816-3 Activation / Deactivation sequencer
with emergency automated deactivation
. Protection includes 2 voltage supervisors which
detect voltage drops on card VCC and on VDD
power supply
. The VDD voltage supervisor threshold value can be
externally adjusted
A chip select input allows multiple 73S8023C ICs to share
the same control bus. When chip select is set low, the
host microcontroller inputs are latched and outputs are
taken to a high impedance state.
. True over-current detection (150 mA max.)
. 2 card detection inputs, 1 for either possible switch
configuration
The card clock signal can be generated by an on-chip
oscillator using an external crystal or by connecting an
external clock signal.
. Full support of synchronous cards
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System Controller Interface:
. 3 Digital inputs control the card activation /
deactivation, card reset and card voltage
The 73S8023C device incorporates an ISO-7816-3
activation/deactivation sequencer that controls the card
signals. Emergency card deactivation is initiated upon
card extraction or upon any fault generated by the
protection circuitry.
. 3 Digital inputs control the card clock (division rate
and card clock source selection)
. 1 Digital output, interrupt to the system controller,
allows the system controller to monitor the card
presence and faults
. 1 Power down digital input (places the 73S8023C
in a very low-power mode (card deactivated)
The 73S8023C requires only a single 2.7 V to 3.6 V power
supply, and features a high-efficiency embedded DC-DC
converter. This architecture, plus a Power Down digital
input that allow placing the IC in a very low-power mode
making the 73S8023C particularly suitable for low-power
applications (cell-phones, PDAs, payphones, hand-held
POS terminals…).
. 1 Chip select digital input for parallel operation of
several 73S8023C ICs.
. 1 External clock input (STROBE), used for
synchronous operation
. 1 Digital output clock, buffered version of signal on
XTALIN
ADVANTAGES
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Supports both synchronous and asynchronous smart
cards
. Crystal oscillator or host clock (XTALIN), up to
27 MHz
Replacement for TDA8002, with up to 600 mW in
power savings (@ EMV ICCmax condition) !
•
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Power Supply: VDD 2.7 V to 3.6 V
The inductor-based DC-DC converter provides higher
current and efficiency
6 kV ESD Protection on the card interface
Ideal for battery-powered applications
APPLICATIONS
Suitable for high current cards and SAMs: (100 mA
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Point of Sales and Transaction Terminals
Payphones
max)
Single 2.7 V to 3.6 V power supply allows removal
Set-Top-Boxes, DVD / HDD Recorders
of 5 V from the system
Payment card interfaces in portable devices (PDAs,
mobile phones…)
•
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Power down mode: 2 µA typical
Package: Small Format (5x5mm) 32-QFN
Rev. 1.5
© 2009 Teridian Semiconductor Corporation
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