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