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| 型號： | ADT7476AARQZ-R |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 10/66頁 |
| 文件大?。?/td> | 945K |
| 描述： | IC REMOTE THERMAL CTLR 24QSOP |
| 產(chǎn)品變化通告： | MFG CHG Notification ADI to ON Semi QSOP 24ld Pkg (MSL) Change 17/Jun/2010 |
| 標準包裝： | 2,500 |
| 系列： | dBCool® |
| 功能： | 風扇控制，溫度監(jiān)控器 |
| 傳感器類型： | 內(nèi)部和外部 |
| 感應溫度： | -40°C ~ 125°C |
| 精確度： | ±2.5% |
| 拓撲： | ADC，比較器，風扇速度計數(shù)器，多路復用器，寄存器庫 |
| 輸出類型： | SMBus? |
| 輸出警報： | 無 |
| 輸出風扇： | 是 |
| 電源電壓： | 3 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SSOP（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 24-QSOP |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | ADT7476AARQZ-R-ND ADT7476AARQZ-ROSTR |
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ADT7476A
http://onsemi.com
10
clock pulse to assert a stop condition. In read
mode, the master device overrides the
acknowledge bit by pulling the data line high
during the low period before the ninth clock pulse.
This is known as no acknowledge. The master then
takes the data line low during the low period
before the 10
th
clock pulse, and then high during
the 10
th
clock pulse to assert a stop condition.
Any number of bytes of data can be transferred over the
serial bus in one operation. However, it is not possible to mix
read and write in one operation because the type of operation
is determined at the beginning and cannot subsequently be
changed without starting a new operation. In the
ADT7476A, write operations contain either one or two
bytes, and read operations contain one byte.
To write data to one of the device data registers or read
data from it, the address pointer register must be set so the
correct data register is addressed. Then, data can be written
into that register or read from it. The first byte of a write
operation always contains an address stored in the address
pointer register. If data is to be written to the device, then the
write operation contains a second data byte that is written to
the register selected by the address pointer register.
This write operation is illustrated in Figure 18. The device
address is sent over the bus, and then R/W
is set to 0. This
is followed by two data bytes. The first data byte is the
address of the internal data register to be written to, which
is stored in the address pointer register. The second data byte
is the data to be written to the internal data register.
When reading data from a register, there are two
possibilities:
1. If the ADT7476As address pointer register value
is unknown, or not the desired value, then it must
first be set to the correct value before data can be
read from the desired data register. This is done by
performing a write to the ADT7476A as before,
but only the data byte containing the register
address is sent, because no data is written to the
register (see Figure 19).
A read operation is then performed consisting of
the serial bus address; R/W
bit set to 1, followed
by the data byte read from the data register (see
Figure 20.)
2. If the address pointer register is already known to
be at the desired address, data can be read from the
corresponding data register without first writing to
the address pointer register (see Figure 20).
It is possible to read a data byte from a data register
without first writing to the address pointer register, if the
address pointer register is already at the correct value.
However, it is not possible to write data to a register without
writing to the address pointer register, because the first data
byte of a write is always written to the address pointer
register.
In addition to supporting the send byte and receive byte
protocols, the ADT7476A also supports the read byte
protocol. See Intels System Management Bus Specifications
Revision 2 for more information.
If several read or write operations must be performed in
succession, the master can send a repeat start condition
instead of a stop condition to begin a new operation.
Figure 18. Writing a Register Address to the Address Pointer Register, then Writing Data to the Selected Register
0
SCL
SDA
1
0
1
1
A1 A0
D7 D6 D5 D4 D3 D2 D1 D0
ACK. BY
ADT7476A
START BY
MASTER
1
9
1
ACK. BY
ADT7476A
9
D7 D6 D5 D4 D3 D2 D1 D0
ACK. BY
ADT7476A
STOP BY
MASTER
1
9
SCL (CONTINUED)
SDA (CONTINUED)
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
ADDRESS POINTER REGISTER BYTE
FRAME 3
DATA BYTE
R/W
Figure 19. Writing to the Address Pointer Register Only
0
SCL
SDA
1
0
1
1
A1 A0
D7 D6 D5 D4 D3 D2 D1
D0
ACK. BY
ADT7476A
STOP BY
MASTER
START BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
ADDRESS POINTER REGISTER BYTE
1
1
9
ACK. BY
ADT7476A
9
R/W
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| ADT7476AARQZ-REEL | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標準包裝: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 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇: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 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADT7476AARQZ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標準包裝: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 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇: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 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADT7476AARQZ-RL7 | 功能描述:板上安裝溫度傳感器 MONITORS 5V/4 FANS 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 |
| ADT7476ARQH | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:dBCOOL Remote Thermal Controller and Voltage Monitor |
| ADT7476ARQH-REEL | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:dBCOOL Remote Thermal Controller and Voltage Monitor |
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