DS8005 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – Smart Card Intergace

19-5257; Rev 0; 4/10
Smart Card Interface
General Description
The DS8005 dual smart card interface is a low-cost,
dual analog front-end for an IC card reader interface
that needs to communicate with two smart cards in a
mutually exclusive fashion. The analog interface is
designed for use in ISO 7816, EMV^®, and B-CAS appli-
cations. The device is functionally similar to two
DS8024s with external multiplexing to select the active
interface, but also includes low power and 1.8V card
support. Additionally, the device is designed for appli-
cations where the C4/C8 (AUX1/AUX2) contacts are not
required on either card interface.
The device is provided in a 28-pin SO package. The
pinout is backwards compatible with the DS8313,
allowing applications to use the same footprint and
PCB for applications that communicate with either one
or two smart cards.
The device is designed to be used with microcon-
trollers that contain an ISO 7816 UART, or have the
bandwidth to run this protocol in software by bit-bang-
ing IO ports. If the microcontroller does not have the
capability of running the ISO 7816 UART, the DS8007 is
the more appropriate product selection.
Applications
Set-Top Box Conditional Access
Telecommunications
Pay Television
Access Control
Financial Terminals
Features
♦ Analog Interface and Level Shifting for IC Card
Communication
♦ ±8kV (min) ESD (HBM) Protection on Card Interfaces
♦ Ultra-Low Stop-Mode Current, Less than 10nA
Typical
♦ Internal IC Card Supply-Voltage Generation
5.0V ±5%, 80mA (max)
3.0V ±8%, 65mA (max)
1.8V ±10%, 30mA (max)
♦ Automatic Card Activation and Deactivation
Controlled by Dedicated Internal Sequencer
♦ I/O Lines from Host Directly Level Shifted for
Smart Card Communication
♦ Flexible Card Clock Generation, Supporting
External Crystal Frequency Divided by 1, 2, 4, or 8
♦ High-Current, Short-Circuit and High-Temperature
Protection
♦ Low Active-Mode Current
♦ Internal Multiplexing Allows One ISO 7816 UART
Implementation to Control Two Smart Card
Sockets
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS8005-RRX+
-40°C to +85°C
28 SO
+Denotes a lead(Pb)-free/RoHS-compliant package.
Selector Guide
PART
DS8005-RRX+
CARD VOLTAGES
SUPPORTED
1.8V, 3V, 5V
LOW STOP-MODE
POWER
Yes
LOW ACTIVE-
MODE POWER
Yes
PRES_ POLARITY
Positive
V_DDA INPUTS
2
Typical Application Circuit appears at end of data sheet.
EMV is a registered trademark of EMVCo LLC.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be
simultaneously available through various sales channels. For information about device errata, go to: www.maxim-ic.com/errata.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.