参数资料
型号: DS18B20+
厂商: Maxim Integrated
文件页数: 14/22页
文件大小: 528K
描述: IC THERM MICROLAN PROG-RES TO-92
产品培训模块: 1-Wire Communications
Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 500
功能: 温度计,恒温计
传感器类型: 内部
感应温度: -55°C ~ 125°C
精确度: ±2°C(最小值)
拓扑: 寄存器库,变签式暂存器
输出类型: 1-Wire?
输出警报:
输出风扇:
电源电压: 3 V ~ 5.5 V
工作温度: -55°C ~ 125°C
安装类型: 通孔
封装/外壳: TO-226-3、TO-92-3 标准主体
供应商设备封装: TO-92-3
包装: 管件
产品目录页面: 1435 (CN2011-ZH PDF)
DS18B20
 
14 of 22 
Figure 12. DS18B20 Function Commands Flowchart  
 
MASTER T
X
 
FUNCTION
COMMAND
44h
CONVERT
TEMPERATURE
?
PARASITE
POWER
?
DS18B20 BEGINS
CONVERSION
DEVICE
CONVERTING
TEMPERATURE
?
MASTER
RX 0s
 
MASTER
RX 1s
MASTER ENABLES
STRONG PULLUP ON DQ
DS18B20 CONVERTS
MASTER DISABLES
STRONG PULLUP
48h
COPY
SCRATCHPAD
?
PARASITE
POWER
?
N
MASTER ENABLES
STRONG PULL-UP ON DQ
DATA COPIED FROM
MASTER DISABLES
STRONG PULLUP
MASTER
R
X
 0s
COPY IN
PROGRESS
?
Y
MASTER
R 1s
N
RETURN TO INITIALIZATION
SEQUENCE (FIGURE 11) FOR
NEXT TRANSACTION
B4h
READ
POWER SUPPLY
?
Y
PARASITE
POWERED
?
MASTER
R
X
 1s
 
MASTER
R
X
 0s
MASTER T
X
 T
H
 BYTE
TO SCRATCHPAD
4Eh
WRITE
SCRATCHPAD
?
MASTER T
X
 T
L
 BYTE
MASTER T
X
 CONFIG. BYTE
TO SCRATCHPAD
BEh
READ
SCRATCHPAD
?
AVE 8 BYTES
BEEN READ
N
MASTER
T
X
 RESET
MASTER R
X
 DATA BYTE
FROM SCRATCHPAD
MASTER R
X
 SCRATCHPAD
MASTER
R
X
 1s
B8h
RECALL E
2
 
?
MASTER BEGINS DATA
RECALL FROM E
2
 PROM
DEVICE
BUSY RECALLING
DATA
?
N
MASTER
R
X
 0s
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