DS2430A 256-Bit 1-Wire EEPROM

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 16.3

kbits 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

 surface mount package Reads and writes over a wide voltage range of 2.8V to 6.0V from -40°C to +85°C

ORDERING INFORMATION

DS2430A      TO-92 package

DS2430AP    6-pin TSOC package

DS2430AT    Tape & Reel version of DS2430A

DS2430AV   Tape & Reel version of DS2430AP

DS2430AX   Chip Scale Pkg., Tape & Reel

SILICON LABEL 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. 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

which 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.