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參數(shù)資料
| 型號(hào)： | LM75A |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Digital temperature sensor and thermal Watchdog |
| 中文描述： | 數(shù)字溫度傳感器和熱看門狗 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 126K |
| 代理商： | LM75A |
Philips Semiconductors
Product data sheet
LM75A
Digital temperature sensor and thermal Watchdog
2004 Oct 05
12
Data communication
The communication between the host and the LM75A must strictly
follow the rules as defined by the I
2
C-bus management. The
protocols for LM75A register read/write operations are illustrated by
the Figures as follows with these definitions:
1. Before a communication, the I
2
C-bus must be free or not busy. It
means that the SCL and SDA lines must be both released by all
devices on the bus, and they become HIGH by the bus pull-up
resistors.
2. The host must provide SCL clock pulses necessary for the
communication. Data is transferred in sequence of 9 SCL clock
pulses for every 8-bit data byte followed by 1-bit status of the
acknowledgement.
3. During data transfer, except the Start and Stop signals, the SDA
signal must be stable while the SCL signal is HIGH. It means
that SDA signal can be changed only during the LOW duration
of the SCL line.
4.
S:
Start signal, initiated by the host to start a communication,
the SDA goes from HIGH-to-LOW while the SCL is HIGH.
5.
RS:
Re-start signal, same as the Start signal, to start a read
command that follows a write command.
6.
P:
Stop signal, generated by the host to stop a communication,
the SDA goes from LOW-to-HIGH while the SCL is HIGH. The
bus becomes free thereafter.
7.
W:
Write bit, when the Write/Read bit = LOW in a write
command.
8.
R:
Read bit, when the Write/Read bit = HIGH in a read
command.
9.
A:
Device Acknowledge bit, returned by the LM75A. It is LOW if
the device works properly and HIGH if not. The host must
release the SDA line during this period in order to give the
device the control on the SDA line.
10.
A
′
:
Master Acknowledge bit, not returned by the device, but set
by the master or host in reading 2-byte data. During this clock
period, the host must set the SDA line to LOW in order to notice
the device that the first byte has been read for the device to
provide the second byte onto the bus.
11.
NA:
Not-Acknowledge bit. During this clock period, both the
device and host release the SDA line at the end of a data
transfer, the host is then enabled to generate the Stop signal.
12.In a write protocol, data is sent from the host to the device and
the host controls the SDA line, except during the clock period
when the device sends to the bus the device acknowledgement
signal.
13.In a read protocol, data is sent to the bus by the device and the
host must release the SDA line during the time that the device is
providing data onto the bus and controlling the SDA line, except
during the clock period when the master sends to the bus the
master acknowledgement signal.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM75AD | 制造商:NXP Semiconductors 功能描述: |
| LM75AD,112 | 功能描述:板上安裝溫度傳感器 I2C LOCAL +/- 2OC TS RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM75AD,118 | 功能描述:板上安裝溫度傳感器 I2C LOCAL +/- 2OC TS RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM75AD.112 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital temperature sensor and thermal watchdog |
| LM75AD/G-T | 功能描述:IC I2C TEMP SNSR/WATCHDOG 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報(bào):無 輸出風(fēng)扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
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