DS1963L

The DS1963L Monetary iButton can store encrypted data which represents money. The unique registration number, the page write cycle counters, CRC generator and tamper-detect bits prevent unauthorized refilling of the purses. Four independent change purses can be randomly accessed from the on-chip directory. Tamper-detect bits report if the purses have experienced physical tampering. Each write cycle ("Monetary Transaction") generates a unique number to audit the dispensing and refilling of the purses. A change purse can be decremented with less than 100 ms touch dwell time for rapid processing in crowded public facilities.

The DS1963L Monetary iButton is a rugged read/write data carrier that acts as a localized database that can be easily accessed with minimal hardware. The nonvolatile memory offers a simple solution to storing and retrieving information pertaining to the object to which the iButton is associated. Data is transferred serially via the 1-Wire protocol which requires only a single data lead and a ground return.

The scratchpad is an additional page that acts as a buffer when writing to memory. Data is first written to the scratchpad where it can be read back. After the data has been verified, a copy scratchpad command will transfer the data to memory. This process ensures data integrity when modifying the memory. A 48-bit serial number is factory lasered into each DS1963L to provide a guaranteed unique identity which allows for absolute traceability. The durable MicroCan package is highly resistant to environmental hazards such as dirt, moisture, and shock. Its compact coin-shaped profile is self-aligning with mating receptacles, allowing the DS1963L to be easily used by human operators. Accessories permit the DS1963L to be mounted on almost any surface including plastic key fobs, photo-ID badges and printed circuit boards.