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IS23SC4442 Smart Card

Product Code: 32321
Excl. VAT: £0.85 Incl. VAT: £1.02
The IS23SC4442 Smart Card provides 256 bytes of serial EEPROM accessible by Parallax’s Smart Card Reader (#32320). This Smart Card also features a 3-bit error counter and 3-byte programmable security code to prevent unauthorized write/erase operations to the card.

The IS23SC4442 Smart Card is the size of a standard credit card. The pins of the IS23SC4442 are accessible through the gold plated contact pads embedded in the card. When paired with the Smart Card Reader (#32320) connected to the I/O pins of a BASIC Stamp, Propeller, or other microcontroller, the Smart Card can be used for data storage, security systems, tracking systems, or identity authentication.

We also carry the IS24C16A Smart Card (#32322) and IS24C02A Smart Card (#32323).


  • Memory Organization: 256 x 8-bit
  • 2.5 ms write time 
  • 3-byte Programmable Security Code for memory write/erase protection 
  • 3-bit error counter 
  • 1,000,000 erase/write cycles guaranteed with 10 year data retention
  • Power requirements: 2.7–5 VDC; 3 mA typical active current 
  • Communication: I2C (CMOS) 
  • Dimensions:2.5 x 3 in (6.35 x 7.62 cm) 
  • Operating temp range: -22 to +167 °F ( 30 to +75 °C) 


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.

Product Attachments

View FileIS23SC4442 Smart Card Product Docs.    Size: (53.26 KB)
View FileIS23SC4442 Basic Stamp 2 Example Code    Size: (2.63 KB)
View FilePropeller P89X32A Example Code    Size: (9.77 KB)
View FileManufacturer Datasheet    Size: (133.57 KB)

Whenever possible, items which are in stock are dispatched the same day, or the next working day.

Large and/or heavy items are dispatched by UPS courier service and these orders must be placed before 15:00hrs (GMT) to ensure same day dispatch.

Small items are normally sent using a Royal Mail service for UK orders, and International Airmail or UPS for overseas orders

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IS23SC4442 Smart Card

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