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LM95231BIMM-1 Datasheet(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM95231BIMM-1
Description  Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technology
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM95231BIMM-1 Datasheet(HTML) 5 Page - National Semiconductor (TI)

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Temperature-to-Digital Converter Characteristics (Continued)
Unless otherwise noted, these specifications apply for V
DD=+3.0Vdc to 3.6Vdc. Boldface limits apply for TA =TJ =
T
MIN
≤T
A
≤T
MAX; all other limits TA=TJ=+25˚C, unless otherwise noted. TJ is the junction temperature of the LM95231. TD is the
junction temperature of the remote thermal diode.
Parameter
Conditions
Typical
LM95231
BIMM
LM95231
CIMM
Units
(Note 6)
Limits
(Note 7)
Limits
(Note 7)
(Limit)
Diode Source Current
(V
D+ −VD−) = + 0.65V;
high-level
176
300
300
µA (max)
100
100
µA (min)
Low-level
11
µA
Power-On Reset Threshold
Measure on V
DD input, falling
edge
2.7
1.8
2.7
1.8
V (max)
V (min)
Logic Electrical Characteristics
Digital DC Characteristics
Unless otherwise noted, these specifications apply for V
DD=+3.0 to 3.6 Vdc. Boldface limits apply for TA =TJ =TMIN to
T
MAX; all other limits TA=TJ=+25˚C, unless otherwise noted.
Symbol
Parameter
Conditions
Typical
Limits
Units
(Note 6)
(Note 7)
(Limit)
SMBDAT, SMBCLK INPUTS
V
IN(1)
Logical “1” Input Voltage
2.1
V (min)
V
IN(0)
Logical “0”Input Voltage
0.8
V (max)
V
IN(HYST)
SMBDAT and SMBCLK Digital Input
Hysteresis
400
mV
I
IN(1)
Logical “1” Input Current
V
IN =VDD
0.005
±10
µA (max)
I
IN(0)
Logical “0” Input Current
V
IN = 0 V
−0.005
±10
µA (max)
C
IN
Input Capacitance
5
pF
SMBDAT OUTPUT
I
OH
High Level Output Current
V
OH =VDD
10
µA (max)
V
OL
SMBus Low Level Output Voltage
I
OL = 4mA
I
OL = 6mA
0.4
0.6
V (max)
SMBus Digital Switching Characteristics
Unless otherwise noted, these specifications apply for V
DD=+3.0 Vdc to +3.6 Vdc, CL (load capacitance) on output lines = 80
pF. Boldface limits apply for T
A =TJ =TMIN to TMAX; all other limits TA =TJ = +25˚C, unless otherwise noted. The switching
characteristics of the LM95231 fully meet or exceed the published specifications of the SMBus version 2.0. The following pa-
rameters are the timing relationships between SMBCLK and SMBDAT signals related to the LM95231. They adhere to but are
not necessarily the SMBus bus specifications.
Symbol
Parameter
Conditions
Typical
Limits
Units
(Note 6)
(Note 7)
(Limit)
f
SMB
SMBus Clock Frequency
100
10
kHz (max)
kHz (min)
t
LOW
SMBus Clock Low Time
from V
IN(0)max to VIN(0)max
4.7
25
µs (min)
ms (max)
t
HIGH
SMBus Clock High Time
from V
IN(1)min to VIN(1)min
4.0
µs (min)
t
R,SMB
SMBus Rise Time
(Note 12)
1
µs (max)
t
F,SMB
SMBus Fall Time
(Note 13)
0.3
µs (max)
t
OF
Output Fall Time
C
L = 400pF,
I
O = 3mA, (Note 13)
250
ns (max)
t
TIMEOUT
SMBDAT and SMBCLK Time Low for Reset of
Serial Interface (Note 14)
25
35
ms (min)
ms (max)
t
SU;DAT
Data In Setup Time to SMBCLK High
250
ns (min)
www.national.com
5


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