PRELIMINARY
DS2433
4k-Bit 1-Wire
TM
EEPROM
www.dalsemi.com
FEATURES
§
4096 bits Electrically Erasable Programmable
Read Only Memory (EEPROM)
§
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
§
Memory partitioned into sixteen 256-bit pages
for packetizing data
§
256-bit scratchpad with strict read/write
protocols ensures integrity of data transfer
§
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
16.3k bits per second
§
Overdrive mode boosts communication speed
to 142k bits per second
§
8-bit family code specifies DS2433
communication requirements to reader
§
Presence detector acknowledges when reader
first applies voltage
§
Low cost PR-35 or 8-pin SOIC surface mount
package
§
Reads and writes over a wide voltage range of
2.8V to 6.0V from -40°C to +85°C
PIN ASSIGNMENT
NC
NC
DATA
GND
1
2
3
4
8
7
6
5
NC
NC
NC
NC
8-PIN SOIC (208 MIL)
1
2
3
1 2
3
PR-35
BOTTOM VIEW
PIN DESCRIPTION
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5-8
PR-35
Ground
Data
NC
--
--
SOIC
NC
NC
Data
Ground
NC
ORDERING INFORMATION
DS2433
DS2433S
DS2433T
DS2433Y
DS2433X
PR-35 package
8-pin SOIC package
Tape & Reel version of DS2433
Tape & Reel version of DS2433S
Chip Scale Pkg., Tape & Reel
SILICON LABEL DESCRIPTION
The DS2433 4K-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 DS2433 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 (23h) plus
4096 bits of user-programmable EEPROM. The power to read and write the DS2433 is derived entirely
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062299
DALLAS [ DALLAS SEMICONDUCTOR ]
