DESCRIPTION

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.

FEATURES

▪ 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

   15.3kbits 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 UCSP

   surface mount package

▪ Reads and writes over a wide voltage range of

   2.8V to 5.25V from -40°C to +85°C