- 您现在的位置：买卖IC网 > Datasheet目录39 > DS1821C+ (Maxim Integrated)IC THERMOMETER/STAT PROG 3-TO92 Datasheet资料下载
参数资料
| 型号： | DS1821C+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/19页 |
| 文件大小： | 793K |
| 描述： | IC THERMOMETER/STAT PROG 3-TO92 |
| 标准包装： | 500 |
| 系列： | 1-Wire® |
| 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： | ±1°C |
| 拓扑： | 比较器，寄存器库 |
| 输出类型： | 数字 |
| 输出警报： | 无 |
| 输出风扇： | 无 |
| 电源电压： | 2.7 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 |
DS1821
9 of 19
1-Wire BUS SYSTEM
The 1-Wire bus system uses a single bus master (i.e., a microprocessor) to control slave devices. The
DS1821 functions as a slave device when it is used in 1-Wire mode; however, since the DS1821 is not
addressable or multi-droppable, a single 1-Wire-mode DS1821 must be the only slave device on the bus.
All data and commands are transmitted least significant bit first over the 1-Wire bus.
The following discussion of the 1-Wire bus system is broken down into three topics: hardware
configuration, transaction sequence, and 1-Wire signaling (signal types and timing).
HARDWARE CONFIGURATION
The 1-Wire bus has by definition only a single data line. Each device (in this case, the master and one
DS1821) interfaces to the data line via an open drain or 3state port. This allows each device to release
the data line when the device is not transmitting data so that the bus is available for use by the other
device. The 1-Wire port of the DS1821 (the DQ pin) is open drain with an internal circuit equivalent to
that shown in Figure 6.
The 1-Wire bus requires an external pullup resistor of approximately 5 k&; thus, the idle state for the 1-
Wire bus is high. If for any reason a transaction needs to be suspended, the bus MUST be left in the idle
state if the transaction is to resume. Infinite recovery time can occur between bits so long as the 1-Wire
bus is in the inactive (high) state during the recovery period. If the bus is held low for more than 480 祍,
the DS1821 will be reset.
HARDWARE CONFIGURATION Figure 6
TRANSACTION SEQUENCE
The transaction sequence for accessing the DS1821 via the 1-Wire port is as follows:
" Initialization
" DS1821 Function Command
" Data Transmitted/Received
糀
yp.
X
D 1 21 1-WIRE P RT
100 &
R
X
= RECEIVE
T
X
= TRANSMIT
DD
.7K
-wire bus
Q
in
Micro-
processor
相关PDF资料 |
PDF描述 |
|---|---|
| DS1825U+T&R | IC THERMOMETER DIGITAL 8-USOP |
| DS1842N+T&R | IC CURRENT MONITOR 14TDFN |
| DS18B20+PAR | IC THERM MICROLAN PROG-RES TO-92 |
| DS18B20Z/T&R | IC THERM MICROLAN PROG-RES 8SOIC |
| DS2740U+T&R | IC CURRENT GAUGE(15BIT) 8UMAX |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1821C+ | 功能描述:恒温器 Programmable Digital Thermo-stat/monitor RoHS:否 制造商:Maxim Integrated 功能: 开路温度: 闭合温度: 准确性:+/- 1 C 温度范围:- 55 C to + 125 C 电流额定值:500 uA 电压额定值:2.7 V to 5.5 V 产品:Thermostats |
| DS1821-C02 | 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 |
| DS1821-C04 | 制造商:DSC 功能描述: |
| DS1821S | 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 |
| DS1821S/T&R | 制造商:Maxim Integrated Products 功能描述:PROGRAM THERMOSTAT 208ML 8-SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER/STAT PROG 8-SOIC |
发布紧急采购，3分钟左右您将得到回复。