LM87CIMTX/NOPB National Semiconductor, LM87CIMTX/NOPB Datasheet - Page 7

• Manufacturer Part Number: LM87CIMTX/NOPB
• Description: IC MONITOR SYS HARDWARE 24TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM87CIMTX/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: *LM87CIMTX; *LM87CIMTX/NOPB; LM87CIMTX

An x indicates that the diode exists.
Note 9: Typicals are at T
Note 10: Limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
Note 11: The Temperature Error specification does not include an additional error of ±1°C, caused by the quantization error.
Note 12: The Temperature Error will vary less than ±1°C over the operating Vcc range of 2.8V to 3.8V.
Note 13: TUE (Total Unadjusted Error) includes Offset, Gain and Linearity errors of the ADC.
Note 14: Total Monitoring Cycle Time includes all diode checks, temperature conversions and analog input voltage conversions. Fan tachometer readings are
determined separately and do not affect the completion of the monitoring cycle.
Note 15: This is the lowest DAC code guaranteed to give a non-zero DAC output.
Note 16: The total fan count is based on 2 pulses per revolution of the fan tachometer output.
Note 17: Timing specifications are tested at the specified logic levels, V
ADD/NTEST_OUT
FAN1–FAN2
Pin Name
SMBData
SMBCLK
RESET#
INT#
CI
J
= T
D1
x
x
x
x
x
x
x
A
= 25 °C and represent most likely parametric norm.
D2
x
x
x
x
x
x
x
D3
x
x
x
x
x
x
x
R1
0
0
0
0
0
0
0
FIGURE 2. ESD Protection Input Structure
R2
∞
∞
∞
∞
∞
∞
∞
100k
100k
R3
∞
∞
∞
∞
∞
1M
1M
1M
1M
1M
1M
1M
R4
IL
for a falling edge and V
7
+3.3Vin, +2.5Vin, Vccp1,
DACOut/NTEST_IN
VID4–VID0
Pin Name
THERM
+12Vin
Vccp2
+5Vin
IH
for a rising edge.
10099505
D1
x
x
x
x
x
x
D2
x
x
x
x
x
x
D3
x
x
x
x
R1
0
0
0
R1+R2
≈
R1+R2
≈
R1+R2
≈
130k
130k
130k
R2
∞
∞
∞
www.national.com
100k 1M
100k 1M
R3
∞
∞
∞
∞
1M
1M
R4