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LM81 Datasheet(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
No. de pieza LM81
Descripción Electrónicos  Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor
Download  33 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM81 Datasheet(HTML) 7 Page - National Semiconductor (TI)

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DC Electrical Characteristics (Continued)
The following specifications apply for +2.8V
DC ≤ V
+
≤ +3.8V
DC,RS = 500Ω, unless otherwise specified. Boldface limits apply
for T
A =TJ =TMIN to TMAX; all other limits TA =TJ = 25˚C. (Note 8)
Symbol
Parameter
Conditions
Typical
Limits
LM81BIM
Limits
LM81CIM
Units
(Note 9)
(Note 10)
(Note 10)
(Limits)
DIGITAL OUTPUTS (NTEST_OUT)
V
OUT(1)
Logical “1” Output Voltage
I
OUT = ±3.0 mA at
V
+ = +2.8V
2.4
2.4
V (min)
V
OUT(0)
Logical “0” Output Voltage
I
OUT = ±3.0 mA at
V
+ = +3.8V
0.4
0.4
V (max)
OPEN- DRAIN DIGITAL OUTPUTS (SMBData, RESET, CI, INT, T_CRIT_A)
V
OUT(0)
Logical “0” Output Voltage
I
OUT = −3.0 mA
0.4
0.4
V (min)
I
OH
High Level Output Current
V
OUT =V
+
0.1
100
100
µA (max)
RESET and Chassis Intrusion
45
20
20
ms (min)
Pulse Width
DIGITAL INPUTS: VID0–VID4, NTEST_IN, A0/NTEST_OUT, A1, Chassis Intrusion (CI)
V
IN(1)
Logical “1” Input Voltage
2.0
2.0
V (min)
V
IN(0)
Logical “0” Input Voltage
0.8
0.8
V (max)
SMBus DIGITAL INPUTS (SMBCLK, SMBData)
V
IN(1)
Logical “1” Input Voltage
2.1
1.4
V (min)
V
IN(0)
Logical “0” Input Voltage
0.8
0.6
V (max)
Tach Pulse Logic Inputs (FAN1, FAN2)
V
IN(1)
Logical “1” Input Voltage
0.7xV
+
0.7xV
+
V (min)
V
IN(0)
Logical “0” Input Voltage
0.3xV
+
0.3xV
+
V (max)
ALL DIGITAL INPUTS
I
IN(1)
Logical “1” Input Current
V
IN =V
+
−0.005
−1
−1
µA (min)
I
IN(0)
Logical “0” Input Current
V
IN =0 VDC
0.005
11
µA (max)
C
IN
Digital Input Capacitance
20
pF
www.national.com
7


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