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| 型號(hào)： | LM75AD,112 |
| 廠商： | NXP Semiconductors |
| 文件頁(yè)數(shù)： | 11/24頁(yè) |
| 文件大?。?/td> | 137K |
| 描述： | IC TEMP SENSOR DIGITAL 8-SOIC |
| 特色產(chǎn)品： | NXP - I2C Interface |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 功能： | 溫度監(jiān)視系統(tǒng)（傳感器），監(jiān)視器 |
| 傳感器類(lèi)型： | 內(nèi)部 |
| 感應(yīng)溫度： | -55°C ~ 125°C |
| 精確度： | ±3°C（最小值） |
| 拓?fù)洌?/td> | ADC（三角積分型），比較器，振蕩器，寄存器庫(kù) |
| 輸出類(lèi)型： | 2 線串行，I²C? |
| 輸出警報(bào)： | 無(wú) |
| 輸出風(fēng)扇： | 是 |
| 電源電壓： | 2.8 V ~ 5.5 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁(yè)面： | 846 (CN2011-ZH PDF) |
| 配用： | 568-4002-ND - DEMO BOARD I2C |
| 其它名稱(chēng)： | 568-4226-5 935269775112 LM75AD LM75AD-ND |
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LM75A_4
?NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 04 10 July 2007
11 of 24
NXP Semiconductors
LM75A
Digital temperature sensor and thermal watchdog
When the power supply voltage is dropped below the device power-on reset level of
approximately 1.9 V (POR) and then rises up again, the device will be reset to its default
condition as listed above.
7.10 Protocols for writing and reading the registers
The communication between the host and the LM75A must strictly follow the rules as
dened by the I
2
C-bus management. The protocols for LM75A register read/write
operations are illustrated in
Figure
5 to
Figure
10 together with the following denitions:
1. Before a communication, the I
2
C-bus must be free or not busy. It means that the SCL
and SDA lines must both be 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 a 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 the 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 notify the device that the rst 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 the device
acknowledgement signal to the bus.
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 the master
acknowledgement signal to the bus.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM75ADP | 制造商:NXP Semiconductors 功能描述:Digital Temp Sensor 2-Wire,LM75ADP |
| LM75ADP,118 | 功能描述:板上安裝溫度傳感器 TEMP SENSOR DIGITAL RoHS:否 制造商:Omron Electronics 輸出類(lèi)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 |
| LM75ADP,118 | 制造商:NXP Semiconductors 功能描述:IC, TEMP SENSOR, 0.125C, 3C, TSSOP-8 |
| LM75ADP,118-CUT TAPE | 制造商:NXP 功能描述:LM75A Series SMD 5.5 mA Digital Temperature Sensor w/ Thermal Watchdog TSSOP-8 |
| LM75ADP/DG,118 | 功能描述:板上安裝溫度傳感器 DIGITAL TEMP SENSOR AND THERMAL WATCHDOG RoHS:否 制造商:Omron Electronics 輸出類(lèi)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 |
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