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LM87 数据表(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LM87
功能描述  Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing
PDF  32 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM87 数据表(HTML) 7 Page - National Semiconductor (TI)

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Pin Name
D1
D2
D3
R1
R2
R3
R4
Pin Name
D1
D2
D3
R1
R2
R3
R4
INT#
xxx
0
∞ 100k 1M
+12Vin
x
x
R1+R2
≈130k
∞
CI
xxx
0
∞∞
1M
+5Vin
x
x
R1+R2
≈130k
∞
FAN1–FAN2
x
x
x
0
∞∞
1M
+3.3Vin, +2.5Vin,
Vccp1, Vccp2
x
x
x
R1+R2
≈130k
∞ 1M
SMBCLK
x
x
x
0
∞∞
1M
THERM
x
x
x
0
∞ 100k 1M
SMBData
x
x
x
0
∞∞
1M
VID4–VID0
x
x
x
0
∞ 100k 1M
RESET#
xxx
0
∞ 100k 1M
DACOut/NTEST_IN
x
x
x
0
∞∞ 1M
ADD/NTEST_OUT
x
x
x
0
∞∞
1M
Note 9: Typicals are at TJ =TA = 25 ˚C and represent most likely parametric norm.
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, VIL for a falling edge and VIH for a rising edge.
10099505
An x indicates that the diode exists.
FIGURE 2. ESD Protection Input Structure
www.national.com
7



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