General Description

nized as 16 memory pages of 256 bits each. Data is

written to a 32-byte scratchpad, verified, and then

copied to the EEPROM memory. The DS24B33 commu-

nicates over a single-conductor 1-Wire bus. The com-

munication follows the standard 1-Wire protocol. Each

device has its own unalterable and unique 64-bit regis-

tration number that is factory programmed into the chip.

The registration number is used to address the device

in a multidrop 1-Wire net environment. The EEPROM

provides 200,000 cycles of write/erase endurance at

+25°C. The DS24B33 is software compatible to the

DS2433.

Applications

Storage of Calibration Constants

Board Identification

Storage of Product Revision Status

Features

♦ 4096 Bits of Nonvolatile EEPROM Partitioned Into

Sixteen 256-Bit Pages

♦ Read and Write Access is Highly Backward-

Compatible to the DS2433

♦ 256-Bit Scratchpad with Strict Read/Write

Protocols Ensures Integrity of Data Transfer

♦ 200,000 Write/Erase Cycle Endurance at +25°C

♦ Unique, Factory-Programmed, 64-Bit Registration

Number Ensures Error-Free Device Selection and

Absolute Part Identity

♦ Switchpoint Hysteresis to Optimize Performance

in the Presence of Noise

♦ Communicates to Host at 15.4kbps or 125kbps

Using 1-Wire Protocol

♦ Low-Cost Through-Hole and SMD Packages

♦ Operating Range: +2.8V to +5.25V, -40°C to +85°C

♦ IEC 1000-4-2 Level 4 ESD Protection (±8kV

Contact, ±15kV Air, Typical) for IO Pin

4Kb 1-Wire EEPROM with

200k Write/Erase Cycles

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

IO

μC

GND

DS24B33

Typical Operating Circuit

19-5759; Rev 0; 2/11

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

+

Denotes a lead(Pb)-free/RoHS-compliant package.

T&R = Tape and reel.

PART

TEMP RANGE

PIN-PACKAGE

DS24B33+

-40

°C to +85°C

TO-92

DS24B33+T&R

-40

°C to +85°C

TO-92

DS24B33S+

-40

°C to +85°C

8 SO (208 mils)

DS24B33S+T&R

-40

°C to +85°C

8 SO (208 mils)

1-Wire is a registered trademark of Maxim Integrated Products, Inc.