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参数资料
| 型号： | DS18B20-PAR+T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/19页 |
| 文件大小： | 221K |
| 描述： | IC THERM MICROLAN PROG-RES TO-92 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 功能： | 温度计，恒温计 |
| 传感器类型： | 内部 |
| 感应温度： | -55°C ~ 100°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： | 是 |
| 输出风扇： | 无 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -55°C ~ 100°C |
| 安装类型： | 通孔 |
| 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) |
DS18B20-PAR
14 of 19
The DS18B20-PAR samples the 1-Wire bus during a window that lasts from 15 約 to 60 約 after the
master initiates the write time slot. If the bus is high during the sampling window, a 1 is written to the
DS18B20-PAR. If the line is low, a 0 is written to the DS18B20-PAR.
READ/WRITE TIME SLOT TIMING DIAGRAM Figure 13
READ TIME SLOTS
The DS18B20-PAR can only transmit data to the master when the master issues read time slots.
Therefore, the master must generate read time slots immediately after issuing a Read Scratchpad [BEh]
command, so that the DS18B20-PAR can provide the requested data. In addition, the master can generate
read time slots after issuing a Recall E
2
[B8h] command to find out the recall status as explained in the
DS18B20-PAR FUNCTION COMMAND section.
All read time slots must be a minimum of 60 約 in duration with a minimum of a 1 約 recovery time
between slots. A read time slot is initiated by the master device pulling the 1-Wire bus low for a
minimum of 1 約 and then releasing the bus (see Figure 13). After the master initiates the read time slot,
the DS18B20-PAR will begin transmitting a 1 or 0 on bus. The DS18B20-PAR transmits a 1 by leaving
the bus high and transmits a 0 by pulling the bus low. When transmitting a 0, the DS18B20-PAR will
release the bus by the end of the time slot, and the bus will be pulled back to its high idle state by the
pullup resister. Output data from the DS18B20-PAR is valid for 15 約 after the falling edge that initiated
45 ?/SPAN>s
15 ?/SPAN>s
V
PU
GND
1-WIRE BUS
60 ?/SPAN>s < T
X
0 < 120
1 ?/SPAN>s < T
REC
<
DS18B20-PAR samples
MIN TYP MAX
15 ?/SPAN>s
30 s
> 1 s
MASTER WRITE 0 SLOT
MASTER WRITE 1 SLOT
DS18B20-PAR samples
MIN TYP MAX
V
PU
GND
1-WIRE BUS
15 s
MASTER READ 0 SLOT
MASTER READ 1 SLOT
Master samples
Master samples
START
OF SLOT
START
OF SLOT
> 1 s
1 ?/SPAN>s < T
REC
<
15 ?/SPAN>s
15 s
30 ?/SPAN>s
15 s
LINE TYPE LEGEND
Bus master pulling low
DS18B20-PAR pulling low
Resistor pullup
> 1 ?/SPAN>s
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相关代理商/技术参数 |
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| DS18B20-SL | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Programmable Resolution 1-Wire Digital Thermometer |
| DS18B20-SL/T&R | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS18B20-SL+T&R | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL SERL (1-WIRE) - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERM MICROLAN PROG-RES TO-92 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
| DS18B20-SL+T&R | 功能描述:板上安装温度传感器 Prgmble Resolution 1-Wire Parasite Pwr RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS18B20U | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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