- 您现在的位置：买卖IC网 > PDF目录178070 > LM75BIM-5/NOPB (NATIONAL SEMICONDUCTOR CORP) DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT PDF资料下载
参数资料
| 型号： | LM75BIM-5/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | Switch/Digital Output Temperature Sensor |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| 封装： | 0.150 INCH, SOP-8 |
| 文件页数： | 3/18页 |
| 文件大小： | 474K |
| 代理商： | LM75BIM-5/NOPB |
1.9 O.S. POLARITY
The O.S. output can be programmed via the configuration
register to be either active low (default mode), or active high.
In active low mode the O.S. output goes low when triggered
exactly as shown on the O.S. Output Temperature Response
Diagram, Figure 4. Active high simply inverts the polarity of
the O.S. output.
1.10 INTERNAL REGISTER STRUCTURE
1265808
There are four data registers in the LM75B and LM75C, and
an additional Product ID register in the LM75A, selected by
the Pointer register. At power-up the Pointer is set to “000”;
the location for the Temperature Register. The Pointer regis-
ter latches whatever the last location it was set to. In Interrupt
Mode, a read from the LM75, or placing the device in shut-
down mode, resets the O.S. output. All registers are read and
write, except the Temperature register and the LM75A's Prod-
uct ID register, which are read only.
A write to the LM75 will always include the address byte and
the Pointer byte. A write to the Configuration register requires
one data byte, and the T
OS and THYST registers require two
data bytes.
Reading the LM75 can take place either of two ways: If the
location latched in the Pointer is correct (most of the time it is
expected that the Pointer will point to the Temperature regis-
ter because it will be the data most frequently read from the
LM75), then the read can simply consist of an address byte,
followed by retrieving the corresponding number of data
bytes. If the Pointer needs to be set, then an address byte,
pointer byte, repeat start, and another address byte will ac-
complish a read.
The first data byte is the most significant byte with most sig-
nificant bit first, permitting only as much data as necessary to
be read to determine temperature condition. For instance, if
the first four bits of the temperature data indicates an overtem-
perature condition, the host processor could immediately take
action to remedy the excessive temperatures. At the end of a
read, the LM75 can accept either Acknowledge or No Ac-
knowledge from the Master (No Acknowledge is typically
used as a signal for the slave that the Master has read its last
byte).
An inadvertent 8-bit read from a 16-bit register, with the D7
bit low, can cause the LM75 to stop in a state where the SDA
line is held low as shown in Figure 5. This can prevent any
further bus communication until at least 9 additional clock cy-
cles have occurred. Alternatively, the master can issue clock
cycles until SDA goes high, at which time issuing a “Stop”
condition will reset the LM75.
1265809
FIGURE 5. Inadvertent 8-Bit Read from 16-Bit Register where D7 is Zero (“0”)
11
www.national.com
LM75
相关PDF资料 |
PDF描述 |
|---|---|
| LM75 | 2-Wire Serial Temperature Sensor and Monitor |
| LM80CIMTX-32 | Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor |
| LM9637EVAL-KIT | LM9637 Monochrome CMOS Image Sensor VGA 68 FPS |
| LM9647EVAL-KIT | LM9647 Color CMOS Image Sensor VGA 68 FPS |
| LM99-1CIMM | 【1C Accurate, High Temperature, Remote Diode Temperature Sensor with Two-Wire Interface |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM75BIMM-3 | 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 |
| LM75BIMM-3/NOPB | 功能描述:板上安装温度传感器 Digital Temp Sensor 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 |
| LM75BIMM-3/NOPB | 制造商:Texas Instruments 功能描述:Temperature Sensor IC |
| LM75BIMM-3+ | 功能描述:板上安装温度传感器 2-Wire Digital Temp Snsr & Thrml Wtchdog 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 |
| LM75BIMM-3+T | 功能描述:板上安装温度传感器 2-Wire Digital Temp Snsr & Thrml Wtchdog 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 |
发布紧急采购，3分钟左右您将得到回复。