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参数资料
| 型号： | LM75BIM-5/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | Switch/Digital Output Temperature Sensor |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| 封装： | 0.150 INCH, SOP-8 |
| 文件页数： | 4/18页 |
| 文件大小： | 474K |
| 代理商： | LM75BIM-5/NOPB |
1.11 POINTER REGISTER (Selects which registers will be
read from or written to):
P7
P6
P5
P4
P3
P2
P1
P0
0
Register Select
P0-P1: Register Select:
P2
P1
P0
Register
0
Temperature (Read only) (Power-up default)
0
1
Configuration (Read/Write)
0
1
0
T
HYST (Read/Write)
0
1
T
OS (Read/Write)
1
Product ID Register (LM75A Only)
P3–P7: Must be kept zero.
1.12 TEMPERATURE REGISTER (Read Only):
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
MSB
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
LSB
X
D0–D6: Undefined.
D7–D15: Temperature Data. One LSB = 0.5°C. Two's complement format.
1.13 CONFIGURATION REGISTER (Read/Write):
D7
D6
D5
D4
D3
D2
D1
D0
0
Fault Queue
O.S. Polarity
Cmp/Int
Shutdown
Power up default is with all bits “0” (zero).
D0: Shutdown: When set to 1 the LM75 goes to low power shutdown mode.
D1: Comparator/Interrupt mode: 0 is Comparator mode, 1 is Interrupt mode.
D2: O.S. Polarity: 0 is active low, 1 is active high. O.S. is an open-drain output under all conditions.
D3–D4: Fault Queue: Number of faults necessary to detect before setting O.S. output to avoid false tripping due to noise. Faults
are determind at the end of a conversion. See specified temperature conversion time in the electrical tables.
D4
D3
Number of Faults
0
1 (Power-up default)
0
1
2
1
0
4
1
6
D5–D7: These bits are used for production testing and must be kept zero for normal operation.
1.14 T
HYST AND TOS REGISTER (Read/Write):
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
MSB
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
LSB
X
D0–D6: Undefined
D7–D15: T
HYST Or TOS Trip Temperature Data. Power up default is TOS = 80°C, THYST = 75°C
1.15 PRODID: PRODUCT ID REGISTER (LM75A Only)
(Read Only) Pointer Address: 07h
D7
D6
D5
D4
D3
D2
D1
D0
1
0
1
0
1
D4--D7 Product Identification Nibble. Always returns Ah to uniquely identify this part as the LM75A.
D0--D3 Die Revision Nibble. Returns 1h to uniquely identify the revision level as one.
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LM75
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