参数资料
| 型号： | DS24B33+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/23页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 4KBIT TO92-3 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 4K (256 x 16) |
| 接口： | 1 线 |
| 电源电压： | 2.8 V ~ 5.25 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | TO-226-3、TO-92-3（TO-226AA）成形引线 |
| 供应商设备封装： | TO-92-3 |
| 包装： | 带卷 (TR) |
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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