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.
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
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).
ꢁProtection includes 3 voltage supervisors that
detect voltage drops on VCC (card), VDD (digital),
and VPC (regulator) power supplies
ꢁThe VDD voltage supervisor threshold value can be
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.
externally adjusted
ꢁOver-current detection 150mA max.
ꢁCard clock stop high or low
ꢁ2 card detection inputs, 1 for each possible user
TDK
73S8004R
incorporates
an
ISO-7816-3
polarity
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.
ꢁ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
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.
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
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 VDD
(digital power supply), a VPC (regulator power supply), a
VCC (card power supply) or an over-heating fault.
•
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
Digital circuitry is separately powered by a digital power
supply VDD. The VDD 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 VDD voltage threshold value.
ADVANTAGES
APPLICATIONS
•
Traditional step-up converter is replaced by a
LDO regulator:
•
Set-Top-Box Conditional Access and Pay-per-
View
ꢀMore cost-effective
•
•
•
Point of Sales & Transaction Terminals
Control Access & Identification
Memory Card Reader
ꢀ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
Page 1
© 2002-2003 TDK Semiconductor Corporation
Proprietary and Confidential
Rev 1.1
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