SILICON LABEL DESCRIPTION
   The DS2506 64Kb Add-Only Memory identifies and stores relevant information about the product to which it is associated. This lot or product specific information can be accessed with minimal interface, for example a single port pin of a microcontroller. The DS2506 consists of a factory-lasered registration number that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit Family Code (0FH) plus 64Kb of user-programmable EPROM. 

FEATURES
◾ 65536 bits Electrically Programmable Read
   Only Memory (EPROM) communicates with
   the economy of one signal plus ground
◾ Unique, factory-lasered and tested 64-bit
   registration number (8-bit family code +
   48-bit serial number + 8-bit CRC tester)
   assures absolute traceability because no two
   parts are alike
◾ Built-in multidrop controller ensures
   compatibility with other MicroLAN products
◾ EPROM partitioned into 256-bit pages for
   randomly accessing packetized data records
◾ Each memory page can be permanently write
   protected to prevent tampering
◾ Device is an “add only” memory where
   additional data can be programmed into
   EPROM without disturbing existing data
◾ Architecture allows software to patch data by
   superseding an old page in favor of a newly
   programmed page
◾ Reduces control, address, data, power, and
   programming signals to a single data pin
◾ Directly connects to a single port pin of a
   microprocessor and communicates at up to
   16.3 kbits per second
◾ Overdrive mode boosts communication speed
   to 142 kbits per second
◾ 8-bit family code specifies DS2506
   communications requirements to reader
◾ Presence detector acknowledges when the
   reader first applies voltage
◾ Low cost PR35 or 8-pin SOIC surface mount
   package
◾ Reads over a wide voltage range of 2.8V to
   6.0V from -40°C to +85°C; programs at
   11.5V to 12.0V from -40°C to +50°C