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參數(shù)資料
| 型號： | LM77CIMM-5 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | 9-Bit Sign Digital Temperature Sensor and Thermal Window Comparator with Two-Wire Interface |
| 中文描述： | 9位注冊數(shù)字溫度傳感器和熱窗口比較器的兩線接口 |
| 文件頁數(shù)： | 8/17頁 |
| 文件大小： | 373K |
| 代理商： | LM77CIMM-5 |
1.0 Functional Description
(Continued)
terrupts just after reprogramming setpoints. Typically, sys-
tem Interrupt inputs are masked prior to reprogramming trip
points. By doing a read just after resetting trip points, but
prior to unmasking, unexpected Interrupts are prevented.
Avoid programming setpoints so close that their hysteresis
values overlap.An example would be that with a T
value
of 2C then setting T
and T
to within 4C of each
other will violate this restriction. To be more specific, with
T
set to 2C assume T
set to 64C. If T
is set
equal to, or higher than 60C this restriction is violated.
1.2 DEFAULT SETTINGS
The LM77 always powers up in a known state. LM77 power
up default conditions are:
1.
Comparator Interrupt Mode
2.
T
LOW
set to 10C
3.
T
HIGH
set to 64C
4.
T_CRIT set to 80C
5.
T
HYST
set to 2C
6.
INT and T_CRIT_A active low
7.
Pointer set to “00”; Temperature Register
The LM77 registers will always reset to these default values
when the power supply voltage is brought up from zero volts
as the supply crosses the voltage level plotted in the follow-
ing curve. The LM77 registers will reset again when the
power supply drops below the voltage plotted in this curve.
1.3 SERIAL BUS INTERFACE
The LM77 operates as a slave on the Serial Bus, so the SCL
line is an input (no clock is generated by the LM77) and the
SDA line is a bi-directional serial data line. According to
Serial Bus specifications, the LM77 has a 7-bit slave ad-
dress. The five most significant bits of the slave address are
hard wired inside the LM77 and are “10010”. The two least
significant bits of the address are assigned to pins A1–A0,
and are set by connecting these pins to ground for a low, (0);
or to +V
S
for a high, (1).
Therefore, the complete slave address is:
1
0
0
1
0
A1
A0
LSB
MSB
Average Power on Reset Voltage
vs Temperature
DS100136-18
L
www.national.com
8
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM77CIMM-5/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| LM77CIMMX-3 | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| LM77CIMMX-3/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| LM77CIMMX-5 | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| LM77CIMMX-5/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
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