SPECIAL FEATURES
• 512 bits (DS2501-UNW) or 1024 bits (DS2502-UNW)
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, 36-bit serialization, 12-bit
UniqueWare Identifier 5E7H, 8-bit CRC-tester)
assures absolute traceability because no two parts are
alike. Family code 91H for the DS2501-UNW, 89H for
the DS2502-UNW
• Built-in multidrop controller ensures compatibility with
other MicroLANTM products
• EPROM partitioned into two (DS2501-UNW) or four
(DS2502-UNW) 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
• Reduces control, address, data, power and programming signals to a single pin
• Directly connects to a single port pin of a microprocessor and communicates at up to 16.3k bits per second
• Presence detector acknowledges when reader first
applies voltage
• Low cost TO-92 or 8-pin SOIC and TSOC surface
mount packages
• Reads ovover 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