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

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

Smart Card Interface

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-5257; Rev 0; 4/10

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.

PART

TEMP RANGE

PIN-PACKAGE

DS8005-RRX+

-40

°C to +85°C

28 SO

+

Denotes a lead(Pb)-free/RoHS-compliant package.

Typical Application Circuit appears at end of data sheet.

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be

EMV is a registered trademark of EMVCo LLC.

Selector Guide

PART

CARD VOLTAGES

SUPPORTED

LOW STOP-MODE

POWER

LOW ACTIVE-

MODE POWER

PRES_ POLARITY

DS8005-RRX+

1.8V, 3V, 5V

Yes

Yes

Positive

2