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LM75CIM-5 Datasheet(PDF) 11 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza LM75CIM-5
Descripción Electrónicos  Digital Temperature Sensor and Thermal WATCHDOG with Two-Wire Interface
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM75CIM-5 Datasheet(HTML) 11 Page - National Semiconductor (TI)

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1.0 Functional Description (Continued)
1.11 POINTER REGISTER
(Selects which registers will be read from or written to):
P7
P6
P5
P4
P3
P2
P1
P0
0
00000
Register
Select
P0-P1: Register Select:
P1
P0
Register
0
0
Temperature (Read only) (Power-up default)
0
1
Configuration (Read/Write)
10
T
HYST (Read/Write)
11
T
OS (Read/Write)
P2–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
XXXXXX
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
0
0
Fault Queue
O.S.
Cmp/Int
Shutdown
Polarity
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.
Conversions take about 100 ms, typically, to complete.
D4
D3
Number of Faults
0
0
1 (Power-up default)
01
2
10
4
11
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
XXXXXX
X
D0–D6: Undefined
D7–D15: T
HYST Or TOS Trip Temperature Data. Power up
default is T
OS = 80˚C, THYST = 75˚C.
www.national.com
11


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