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参数资料
| 型号： | DS18B20-PAR+T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/19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
13 of 19
1-WIRE SIGNALING
The DS18B20-PAR uses a strict 1-Wire communication protocol to insure data integrity. Several signal
types are defined by this protocol: reset pulse, presence pulse, write 0, write 1, read 0, and read 1. All of
these signals, with the exception of the presence pulse, are initiated by the bus master.
INITIALIZATION PROCEDURE: RESET AND PRESENCE PULSES
All communication with the DS18B20-PAR begins with an initialization sequence that consists of a reset
pulse from the master followed by a presence pulse from the DS18B20-PAR. This is illustrated in
Figure 12. When the DS18B20-PAR sends the presence pulse in response to the reset, it is indicating to
the master that it is on the bus and ready to operate.
During the initialization sequence the bus master transmits (T
X
) the reset pulse by pulling the 1-Wire bus
low for a minimum of 480 約. The bus master then releases the bus and goes into receive mode (R
X
).
When the bus is released, the 5k pullup resistor pulls the 1-Wire bus high. When the DS18B20-PAR
detects this rising edge, it waits 1560 約 and then transmits a presence pulse by pulling the 1-Wire bus
low for 60240 約.
INITIALIZATION TIMING Figure 12
READ/WRITE TIME SLOTS
The bus master writes data to the DS18B20-PAR during write time slots and reads data from the
DS18B20-PAR during read time slots. One bit of data is transmitted over the 1-Wire bus per time slot.
WRITE TIME SLOTS
There are two types of write time slots: Write 1 time slots and Write 0 time slots. The bus master
uses a Write 1 time slot to write a logic 1 to the DS18B20-PAR and a Write 0 time slot to write a logic 0
to the DS18B20-PAR. All write time slots must be a minimum of 60 約 in duration with a minimum of a
1 約 recovery time between individual write slots. Both types of write time slots are initiated by the
master pulling the 1-Wire bus low (see Figure 13).
To generate a Write 1 time slot, after pulling the 1-Wire bus low, the bus master must release the 1-Wire
bus within 15 約. When the bus is released, the 5k pullup resistor will pull the bus high. To generate a
Write 0 time slot, after pulling the 1-Wire bus low, the bus master must continue to hold the bus low for
the duration of the time slot (at least 60 約).
LINE TYPE LEGEND
Bus master pulling low
DS18B20-PAR pulling low
Resistor ullu
V
PU
GND
1-WIRE BUS
480 ?/SPAN>s minimum
480 s minimum
DS18B20-PAR T
X
presence pulse
60-240 ?/SPAN>s
MASTER T
X
RESET PULSE
MASTER R
X
DS18B20-PAR
waits 15-60 ?/SPAN>s
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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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