73S8014RT Datasheet, PDF (1/29 Pages) Teridian Semiconductor Corporation – Smart Card Interface

Simplifying System Integration™
73S8014RT
Smart Card Interface
DATA SHEET
December 2008
DESCRIPTION
The Teridian 73S8014RT is a single smart card (ICC)
interface circuit. It is derived from the 73S8024RN
industry-standard electrical interface but adds support
for 1.8V smart card applications. The 73S8014RT has
been optimized to match most of the typical Set-Top
Box / A/V Conditional Access applications.
Optimization essentially involved a smaller pin-count
and support for single I/O.
The 73S8014RT has been designed to provide full
electrical compliance with ISO 7816-3, EMV 4.0.
Interfacing with the system controller is done through a
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.
The card clock can be generated by an on-chip
oscillator using an external crystal or by connection to
an externally supplied clock signal. In addition, the
clock divider provides divisor values of divide by 1, 2, 4
and 6.
The 73S8014RT incorporates an ISO 7816-3
activation/deactivation sequencer that controls the card
signals. Level-shifters drive the card signals with the
selected card voltage (1.8V, 3V or 5V), coming from an
internal Low Drop-Out (LDO) voltage regulator. This
LDO regulator is powered by a dedicated power supply
input V_PC. Digital circuitry is powered separately by a
digital power supply V_DD. With its embedded LDO
regulator, the 73S8014RT is a cost-effective solution for
any application where a 5V (typically -5% +10%) power
supply is available.
Emergency card deactivation is initiated upon card
extraction or upon any fault detected by the protection
circuitry. The fault can be a card over-current, V_CC
undervoltage or power supply fault (V_DD). The card
over-current circuitry is a true current detection function,
as opposed to V_CC voltage drop detection, as usually
implemented in non-Teridian 8024 interface ICs.
The V_DD voltage fault has a threshold voltage that can
be adjusted with an external resistor network. It allows
automated card deactivation at a customized V_DD
voltage threshold value. It can be used, for instance, to
match the system controller operating voltage range.
APPLICATIONS
• Set-Top Box Conditional Access and Pay-per-
View
• General purpose smart card readers
ADVANTAGES
• Same advantages as the Teridian 73S80xxR
family:
ƒ Card V_CC generated by an LDO regulator
ƒ Very low power dissipation (saves up to 1/2W)
ƒ Fewer external components are required
ƒ Better noise performance
• True card over-current detection
• Small format 20SO package
FEATURES
• Card Interface:
ƒ Complies with ISO 7816-3, EMV 4.0
ƒ 73S801RT device supports 3V / 5V cards up to
65mA and 1.8V up to 40mA
ƒ ISO 7816-3 Activation / Deactivation sequencer
ƒ Automated deactivation upon hardware fault (i.e.
upon drop on V_DD power supply or card
overcurrent)
ƒ The V_DD voltage supervisor threshold value (fault)
can be externally adjusted
ƒ Over-current detection 130mA max
ƒ Card CLK clock frequency up to 20MHz
• System Controller Interface:
ƒ 3 Digital inputs control the card activation /
deactivation, card reset and card voltage
ƒ 2 Digital inputs control the card clock frequency
ƒ 1 Digital output, interrupt to the system controller,
reports to the host the card presence and faults
ƒ Crystal oscillator or host clock, up to 27MHz
• Regulator Power Supply:
ƒ 4.75V to 5.5V (EMV 4.0)
• Digital Interfacing: 2.7V to 5.5V
• 6kV ESD protection on the card interface
• Package: SO 20-pin
• RoHS compliant (6/6) lead-free package
Rev. 1.0
© 2008 Teridian Semiconductor Corporation
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