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DS24B33
1-Wire 4Kb EEPROM
Pin Description
PIN
SFN
2
1
—
TDFN-EP
3
2
1, 4, 5, 6
TO-92
1
2
3
SO
4
3
1, 2, 5 –8
NAME
GND
IO
N.C.
FUNCTION
Ground Reference
1-Wire Bus Interface. Open-drain pin that requires external pullup
Not Connected
Exposed Pad (TDFN only). Solder evenly to the board ’s ground plane for
—
—
—
—
EP
proper operation. Refer to Application Note 3273: Exposed Pads: A Brief
Introduction for additional information.
Detailed Description
The DS24B33 combines 4Kb of data EEPROM with a
fully featured 1-Wire interface in a single chip. The
memory is organized as 16 pages of 256 bits each. A
volatile 256-bit memory page called the scratchpad
acts as a buffer when writing data to the EEPROM to
ensure data integrity. Data is first written to the scratch-
pad, from which it can be read back for verification
before transferring it to the EEPROM. The operation of
the DS24B33 is controlled over the single-conductor
1-Wire bus. Device communication follows the standard
1-Wire protocol. The energy required to read and write
the DS24B33 is derived entirely from the 1-Wire com-
munication line. Each DS24B33 has its own unalterable
and unique 64-bit registration number. The registration
number guarantees unique identification and is used to
address the device in a multidrop 1-Wire net environ-
ment. Multiple DS24B33 devices can reside on a com-
mon 1-Wire bus and be operated independently of
each other. Applications of the DS24B33 include cali-
bration data storage, PCB identification, and storage of
product revision status. The DS24B33 provides a high
degree of backward compatibility with the DS2433,
including having the same family code.
Overview
Figure 1 shows the relationships between the major
control and memory sections of the DS24B33. The
DS24B33 has four main data components: 64-bit
PARASITE POWER
1-Wire NET
1-Wire FUNCTION
CONTROL
MEMORY
FUNCTION
CONTROL UNIT
CRC-16
64-BIT REGISTRATION
NUMBER
DS24B33
GENERATOR
32-BYTE
SCRATCHPAD
DATA MEMORY
16 PAGES OF
32 BYTES EACH
Figure 1. Block Diagram
Maxim Integrated
5
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相关代理商/技术参数
DS24B33G+U 功能描述:电可擦除可编程只读存储器 1-WIRE 4KB 电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
DS24B33Q+T&R 制造商:Maxim Integrated Products 功能描述:1-WIRE 4KB EEPROM - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC EEPROM 4KBIT 6TDFN 制造商:Maxim Integrated Products 功能描述:EEPROM 1-Wire 4kbit EEPROM
DS24B33Q+T&R 功能描述:电可擦除可编程只读存储器 1-Wire 4kbit 电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
DS24B33Q+U 功能描述:电可擦除可编程只读存储器 1-WIRE 4KB 电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
DS24B33S 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Wire 4Kb EEPROM
DS24B33S R 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Wire 4Kb EEPROM
DS24B33S T 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Wire 4Kb EEPROM
DS24B33S TR 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Wire 4Kb EEPROM