The DS2430A 256-bit 1-Wire® EEPROM 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 DS2430A 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 (14h) plus 256 bits of user-programmable EEPROM and a 64-bit one-time programmable application register. The power to read and write the DS2430A is derived entirely from the 1-Wire communication line. Data is
transferred serially via the 1-Wire protocol, which requires only a single data lead and a ground return. The 48-bit serial number that is factory-lasered into each DS2430A provides a guaranteed unique identity that allows for absolute traceability. The TO-92 and TSOC packages provide a compact enclosure that
allows standard assembly equipment to handle the device easily for attachment to printed circuit boards or wiring. Typical applications include storage of calibration constants, board identification, and product
revision status.
Key Features
Applications/Uses
256-bit Electrically Erasable Programmable Read Only Memory (EEPROM) plus 64-bit one-time programmable application register
Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48-bit serial number + 8-bit CRC tester) assures absolute identity because no two parts are alike
Built-in multidrop controller ensures compatibility with other MicroLAN products
EEPROM organized as one page of 32 bytes for random access
Reduces control, address, data, and power to a single data pin
Directly connects to a single port pin of a microprocessor and communicates at up to 16.3kbits per second
8-bit family code specifies DS2430A communication requirements to reader
Presence detector acknowledges when reader first applies voltage
Low cost TO-92 or 6-pin TSOC and Flip Chip surface mount package
Reads and writes over a wide voltage range of 2.8V to 6.0V from -40°C to +85°C
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