Pin Name

D1

D2

D3

R1

R2

R3

R4

Pin Name

D1

D2

D3

R1

R2

R3

R4

INT#

xxx

0

+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

SMBCLK

x

x

x

0

∞∞

1M

THERM

x

x

x

0

SMBData

x

x

x

0

∞∞

1M

VID4–VID0

x

x

x

0

RESET#

xxx

0

DACOut/NTEST_IN

x

x

x

0

ADD/NTEST_OUT

x

x

x

0

∞∞

1M

Note 10: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

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.

10099505

An x indicates that the diode exists.

FIGURE 2. ESD Protection Input Structure

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