32321 Datasheet 32321 | P1-P3

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IS23SC4442 Smart Card (#32321)

The IS23SC4442 Smart Card provides 256 bytes of serial EEPROM accessible by Parallax’s Smart Card

Reader (#32320). This smart card also provides a 3-bit error counter and 3-byte programmable security

code to prevent unauthorized write/erase operations to the card.

Smart cards are used in a variety of applications ranging from telecommunications to personal finance.

The IS23SC4442 Smart Card is 256 x 8 bits of EEPROM main memory embedded in a plastic card, the

size of a standard credit card. The pins of the IS23SC4442 are accessible through the gold plated contact

pads embedded in the card, and when paired with the Smart Card Reader (#32320) can be connected to

the I/O pins of a microcontroller.

Features

Memory Organization: 256 x 8-bit

y 2.5 ms write time

y 3-byte Programmable Security Code for memory

write/erase protection

y 1,000,000 erase/write cycles guaranteed with 10 year

data retention

y Compatible with BASIC Stamp & Propeller

microcontrollers

Key Specifications

Power Requirements: 2.7–5 VDC; 3 mA typical active

current

y Communication: I

C (CMOS)

y Operating temperature: -22 to +167 °F (-30 to +75 °C)

y Dimensions: 2.5 x 3 in (6.35 x 7.62 cm)

Application Ideas

Security systems

y Data storage

y Tracking systems

y Identity authentication

Caution!

The IS23SC4442 smart card does have a programmable security code (PSC) to prevent unauthorized

erase/write operations to the card. By default, this code is set to $FFFFFF. A 3-bit error counter (EC) is

used to track the number of unsuccessful verifications of the PSC. After three unsuccessful attempts, the

EC will lock the chip from further access, and data can only be read and never written or erased from the

card again. Please refer to the manufacturer’s datasheet for the complete communication protocol.

Card Contact Definitions and Functions

Card Contact Name Type Function

C1 VCC P Supply Voltage

C2 RST I Reset

C3 CLK I Clock Input

C4 NC No Connect

C5 GND G Ground

C6 NC No Connect

C7 I/O IO Bidirectional Data I/O

C8 NC No Connect

Pin Type: P = Power, G = Ground, I = Input, O = Output

Connection Diagram

In order to interface with the smart card, a smart card reader must be used. The diagram below

demonstrates how to connect the Smart Card Reader (#32320) from Parallax to your microcontroller for

use with the example programs included on the IS23SC4442 product page. When inserting the smart

card into the reader, be sure the gold contact pads are facing down.

Resources and Downloads

Check for the latest version of this document, manufacturer’s datasheet, and example programs from the

IS23SC4442 Smart Card product page. Go to www.parallax.com and search 32321.

BASIC Stamp

Example Code

Example code for the BASIC Stamp 2 can be found on the IS23SC4442 product page. This code

demonstrates how to read and write data to the smart card, as well as how to verify the PSC.

This program also uses the Debug Terminal, which is built into the BASIC Stamp Editor software. The

software is a free download from www.parallax.com/basicstampsoftware

Propeller

™

P8X32A Example Code

Example code for the Propeller can be found on the IS234442 product page. This code demonstrates

how to read and write data to the smart card, as well as how to verify the PSC.

This program also uses the Parallax Serial Terminal to display the device output. The object and the

Parallax Serial Terminal itself are included with the with the Propeller Tool v1.2.7 or higher, which is

available from the Downloads link at www.parallax.com/Propeller

P1-P3

32321

Mfr. #:

Buy 32321

Manufacturer:

Parallax

Description:

RFID Transponder Tools Smart Card IS23SC4442

Lifecycle:

New from this manufacturer.

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32321