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參數(shù)資料
| 型號(hào)： | LM74CIM-3 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | IC PROCESSOR UART ONE CHANNEL 16 BYTE RX/TX FIFO |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 13BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | PLASTIC, SOP-8 |
| 文件頁數(shù)： | 10/15頁 |
| 文件大?。?/td> | 293K |
| 代理商： | LM74CIM-3 |
1.0 Functional Description
(Continued)
1.5 INTERNAL REGISTER STRUCTURE
The LM74 has three registers, the temperature register, the
configuration register and the manufacturer’s/device identifi-
cation register. The temperature and manufacturer’s/device
identification registers are read only. The configuration reg-
ister is write only.
1.5.1 Configuration Register
(Selects shutdown or continuous conversion modes):
(Write Only):
D15
X
D14
X
D13
X
D12
X
D11
X
D10
X
D9
X
D8
X
D7
D6
D5
D4
Shutdown
D3
D2
D1
D0
D0–D15 set to XX FF hex enables shutdown mode.
D0–D15 set to 00 00 hex sets Continuous conversion mode.
Note: setting D0-D15 to any other values may place the LM74 into a manufacturer’s test mode, upon which the LM74 will stop
responding as described. These test modes are to be used for National Semiconductor production testing only. See Section 1.2
Serial Bus Interface for a complete discussion.
1.5.2 Temperature Register (after power-up, before first complete temperature conversion)
(Read Only):
D15
1
D14
1
D13
1
D12
1
D11
1
D10
1
D9
1
D8
1
D7
0
D6
0
D5
0
D4
0
D3
0
D2
0
D1
X
D0
X
D0–D1: Undefined. TRI-STATE will be output on SI/0.
D2–D15: Power-on Reset (POR) values.
1.5.3 Temperature Register (after completion of first temperature conversion)
(Read Only):
D15
MSB
D14
Bit 11
D13
Bit 10
D12
Bit 9
D11
Bit 8
D10
Bit 7
D9
Bit 6
D8
Bit 5
D7
Bit 4
D6
Bit 3
D5
Bit 2
D4
Bit 1
D3
LSB
D2
1
D1
X
D0
X
D0–D1: Undefined. TRI-STATE will be output on SI/0.
D2: High.
D3–D15: Temperature Data. One LSB = 0.0625C. Two’s complement format.
1.5.4 Manufacturer’s Device ID Register
(Read Only):
D15
1
D14
0
D13
0
D12
0
D11
0
D10
0
D9
0
D8
0
D7
0
D6
0
D5
0
D4
0
D3
0
D2
0
D1
X
D0
X
D0–D1: Undefined. TRI-STATE will be output on SI/0.
D2–D15: Manufacturer’s/Device ID Data. This register is accessed whenever the LM74 is in shutdown mode.
L
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LM74CIM-3 T&R | 制造商:Texas Instruments 功能描述:Temp Sensor Digital Serial (3-Wire, SPI) 8-Pin SOIC T/R |
| LM74CIM-3/NOPB | 功能描述:板上安裝溫度傳感器 Digital Temp Sensor 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 |
| LM74CIM-3/NOPB | 制造商:Texas Instruments 功能描述:IC TEMP SENSOR |
| LM74CIM-3/NOPB | 制造商:Texas Instruments 功能描述:Temperature Sensor IC |
| LM74CIM-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(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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