73S8024RN Product Brief
Low-Cost Smart Card Interface IC
• Approved for use with NDS Videoguard
®
and EMVco
• General Purpose, High Performance ISO-7816 Electrical Interface
• Replacement for Industry-Standard TDA8004
The 73S8024RN is a single smart card interface IC, compliant to the electrical requirements of
ISO-7816-3, EMV 4.0 and NDS electrical specifications. It is available either in a standard SO28
package, or in a 32-pin QFN package, or in a 20 QFN package (4x4 mm), the latter making it
the smallest solution available today in the market. It can be used in conjunction with any host
microcontroller that can support the smart card protocol layer.
In its SO28 package option, the TDK 73S8024RN is an advantageous replacement for the
industry-standard device TDA8004 since it offers better performance and requires fewer
external components.
A significant advantage of the 73S8024RN over existing IC solutions is the use of a Low
Drop-Out (LDO) voltage regulator to generate the card power supply (VCC) from a nomi-
nal power supply source (VPC) of 5V (or 3V when using 3V cards only). Digital circuitry is
separately powered by a digital power supply VDD, typically 3.3V, which is independent
from the 5V supply of the LDO regulator. The LDO exhibits improved noise performance
when compared to typical step-up converter based ICs, which generate a lot of undesired
noise and ripple causing problems when trying to comply with applicable standards. The
LDO architecture also allows the 73S8024RN to be the highest card current capable smart
card interface IC available today in the market, with up to 90mA minimum provided to the
card. Finally, the LDO regulator IC solution, with fewer external components, makes the
73S8024RN a more cost effective solution for high-volume smart card readers in consum-
er electronics applications such as set-top-boxes, digital TVs, or personal video recorders.
The 73S8024RN includes an ISO-7816 sequencer that controls the card activation/deactiva-
tion. The card itself is also better protected, compared with existing ICs, since the emergency
card deactivation is initiated upon 5 possible hardware faults. These faults are card extraction,
card over-current, VDD fault, VPC fault (LDO regulator power supply), VCC fault (card power
supply, output of the LDO regulator) or a die over-heating fault. The card over-current is a
true current detection circuit, as opposed to the traditional VCC voltage drop detector that is
implemented in most of the available ICs in the market. It guarantees a much cleaner card
deactivation upon current fault.
The VDD fault detection has a threshold voltage that can be adjusted with an external resistor
or resistor network, allowing automated card deactivation at a customized VDD voltage
threshold. This allows, for instance, customizing the automated card deactivation to match
the operating voltage range of the host microcontroller.
Key Applications
Conditional Access (NDS Approved):
for Set-Top-Boxes, DVD or HDD
recorders (Personal Video Recorders)
and Digital TVs
Payment Slot (EMV pre-Certified):
Point of Sales & Transaction Terminals
Control Access & Identification
Key Advantages
NDS-approved
Traditional step-up converter is
replaced by a LDO regulator:
•
Better noise performance
(typical factor 10:1 with existing
converter based ICs)
•
Highest card current interface in the
market: With 90mA for the ICC, it is
suitable for high-performance
smart cards and Secure Access
Modules
•
More cost-effective
True card over-current detection
Pin-to-pin compatible with industry
standards TDA8004
Requires fewer external components
than typical ICC interface ICs
•
Card clock STOP (high and low) mode
•
20 QFN (4 x 4 mm) package option:
The smallest card interface IC of the
industry!
ISO/IEC
7816-3
Features
Card Interface
Complies with ISO-7816, EMV4.0,
GSM11-11 and NDS specifications
Provides at least 90mA to the card
LDO voltage regulator provides 3V/5V
to the card from an external power
supply input
ISO-7816-3 Activation/Deactivation
sequencer
Emergency card deactivation upon
hardware fault:
•
Card removal
•
Voltage supervision faults: Detection
of voltage drops on VCC (card), VDD
(digital) and VPC (regulator) power
supplies
•
Adjustable power supply (VDD) fault
detection (2 resistors needed*)
•
Card over-current (true current
detection)
•
Die over-heating fault
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
[*] Features not available in the QFN20 package option.
73S8024RN Block Diagram
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Power Supply
LDO Regulator (VPC)
•
4.75V to 5.5V (ISO7816/EMV 4.0)
•
4.85V to 5.5V (NDS)
Digital Interfacing (VDD): 2.7V to 5.5V
6KV ESD Protection on the card
interface
Package:
SO28, QFN32 or QFN20
IC Packaging
SO28
Actual Size
32QFN
Actual Size
QFN20
Actual Size
For immediate technical information and the name of a local representative or distributor,
visit www.teridian.com,
send an e-mail to support@teridian.com or call (714) 508-8800.
No responsibility is assumed by Teridian Semiconductor Corporation for use of this product nor for any infringements of patents and trade-
marks or other rights of third parties resulting from its use. No license is granted under any patents, patent rights or trademarks of Teridian
Semiconductor Corporation, and the company reserves the right to make changes in specifications at any time without notice. Accordingly,
the reader is cautioned to verify that the data sheet is current before placing orders.
© 2005 Teridian Semiconductor Corporation
8/05 - rev 2.0
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