73S8004R
Low Cost Smart Card Interface
September 2003
DESCRIPTION
The TDK 73S8004R is a single smart card interface IC
that can be controlled by a dedicated control bus. The
TDK 73S8004R provides full electrical compliance with
ISO-7816-3 and EMV 4.0 (EMV2000) specifications.
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).
The card clock signal can be generated by an on-chip
oscillator using an external crystal or connection to a clock
signal coming from the system controller.
TDK
73S8004R
incorporates
an
ISO-7816-3
activation/deactivation sequencer that controls the card
signals. Level-shifters drive the card signals with the
selected card voltage (3V or 5V), coming from an internal
Low Drop-Out (LDO) voltage regulator. This LDO regulator
is powered by a dedicated power supply input VPC.
With its embedded LDO regulator, the TDK 73S8004R is a
cost-effective solution for any application where a 5V
(typically -5% +10%) power supply is available.
Hardware support for auxiliary I/O lines, C4 / C8 contacts,
is provided.
Emergency card deactivation is initiated upon card
extraction or upon any fault generated by the protection
circuitry. The fault can be a card over-current, a V
DD
(digital power supply), a V
PC
(regulator power supply), a
V
CC
(card power supply) or an over-heating fault.
Digital circuitry is separately powered by a digital power
supply V
DD
. The V
DD
voltage fault has a threshold voltage
that can be adjusted with an external resistor or resistor
network. It allows automated card deactivation at a
customized V
DD
voltage threshold value.
FEATURES
•
Card Interface:
Complies with ISO-7816-3 and EMV 4.0
A LDO voltage regulator provides 3V / 5V to the
card from an external power supply input
Provides at least 65mA to the card
ISO-7816-3 Activation / Deactivation sequencer
with emergency automated deactivation on card
removal or fault detected by the protection circuitry
Protection includes 3 voltage supervisors that
detect voltage drops on V
CC
(card), V
DD
(digital),
and V
PC
(regulator) power supplies
The V
DD
voltage supervisor threshold value can be
externally adjusted
Over-current detection 150mA max.
Card clock stop high or low
2 card detection inputs, 1 for each possible user
polarity
Auxiliary I/O lines, for C4 / C8 contact signals
System Controller Interface:
3 Digital inputs control the card activation /
deactivation, card reset and card voltage
4 Digital inputs control the card clock (division
rate and card clock stop modes)
1 Digital output, interrupt to the system controller,
allows the system controller to monitor the card
presence and faults.
Crystal oscillator or host clock, up to 26MHz
Regulator Power Supply:
4.75V to 5.5V (EMV 4.0)
Digital Interfacing: 2.7V to 5.5V
6kV ESD Protection on the card interface
Package: SO28
•
•
•
•
•
ADVANTAGES
•
Traditional step-up converter is replaced by a
LDO regulator:
More cost-effective
Better noise performance
Pin-to-pin compatible with industry-standard TDA-
8004
Requires fewer external components than usual
ICC interface ICs
Card clock STOP (high and low) mode
APPLICATIONS
•
•
•
Set-Top-Box Conditional Access and Pay-per-
View
Point of Sales & Transaction Terminals
Control Access & Identification
Memory Card Reader
•
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Page 1
©
2002-2003 TDK Semiconductor Corporation
Rev 1.1
Proprietary and Confidential
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
