LM87CIMT/NOPB National Semiconductor, LM87CIMT/NOPB Datasheet - Page 5

• Manufacturer Part Number: LM87CIMT/NOPB
• Description: IC INTERFACE SER MONITOR 24TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM87CIMT/NOPB

• Function: Hardware Monitor
• Topology: ADC (Sigma Delta), Comparator, Fan Speed Control, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 125°C, External Sensor
• Output Type: I²C™/SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 2.8 V ~ 3.8 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM87CIMT; *LM87CIMT/NOPB; LM87CIMT

FAN RPM-TO-DIGITAL CONVERTER
DIGITAL OUTPUTS (NTEST_OUT)
OPEN- DRAIN DIGITAL OUTPUTS (SMBData, RESET#, CI, INT#, THERM#)
DIGITAL INPUTS: VID0–VID4, NTEST_IN, ADD/NTEST_OUT, Chassis Intrusion (CI)
SMBus DIGITAL INPUTS (SMBCLK, SMBData)
Tach Pulse Logic Inputs (FAN1, FAN2)
ALL DIGITAL INPUTS
Symbol
V
V
V
V
V
V
V
V
V
V
V
I
I
OUT(1)
OUT(0)
OUT(0)
OUT(0)
I
C
HYST
IN(1)
IN(0)
R
C
IN(1)
IN(0)
IN(1)
IN(0)
IN(1)
IN(0)
OH
IN
L
L
DAC Error
Output Load Resistance
Output Load Capacitance
Fan RPM Error
Full-scale Count
FAN1 and FAN2 Nominal Input
RPM (See Section 6.0)
Logical “1” Output Voltage
Logical “0” Output Voltage
Logical “0” Output Voltage (SMBData)
Logical “0” Output Voltage (Others)
High Level Output Current
RESET# and Chassis Intrusion
Pulse Width
Logical “1” Input Voltage
Logical “0” Input Voltage
Logical “1” Input Voltage
Logical “0” Input Voltage
Input Hysteresis Voltage
Logical “1” Input Voltage
Logical “0” Input Voltage
Logical “1” Input Current
Logical “0” Input Current
Digital Input Capacitance
Parameter
0 °C
V, Code = 255
V
192
0 °C
3.3 V, Code =
V
+25 °C
−10 °C
−40 °C
Divisor = 1, Fan Count = 153
(Note
Divisor = 2, Fan Count = 153
(Note
Divisor = 3, Fan Count = 153
(Note
Divisor = 4, Fan Count = 153
(Note
I
V
I
V
I
I
V
V
V
OUT
OUT
OUT
OUT
+
O
+
+
OUT
IN
IN
= 3.3 V, 3/4 Scale, code
= +2.8 V
= +3.8 V
= 2.5 V
= V
= 0 V
= ±3.0 mA at
= ±3.0 mA at
= −755 μA
= −3 mA
≤
≤
= V
5
16)
16)
16)
16)
T
T
+
≤
≤
≤
Conditions
A
A
+
DC
T
T
T
≤
≤
A
A
A
+75 °C, V
+75 °C, V, V
≤
≤
≤
8(Note
+75 °C
+100 °C
+125 °C
+
15)
= 3.3
+
=
(Note
Typical
8800
4400
2200
1100
+3.7
243
45
20
5
9)
(Note
0.7 × V
0.3 × V
Limits
1250
-3.3
±10
±15
±20
255
−12
2.4
0.4
0.4
0.4
2.0
0.8
2.1
0.8
±3
20
12
20
12
10)
+
+
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μA (max)
μA (max)
pF (max)
ms (min)
μA (min)
% (max)
% (max)
% (max)
% (max)
(Limits)
V (max)
V (max)
V (max)
V (max)
% (min)
Ω (min)
V (min)
V (min)
V (min)
V (min)
V (min)
V (min)
(max)
Units
RPM
RPM
RPM
RPM
mV
pF
%