Intel SPSH4 Technical Product Specification page 47

SPSH4 Server SystemTechnical Product Specification
4.2.6.4 Power supply Failure
In the event of a power supply failure (OVP at any output, UV at any output, fan failure, or other
failure) the power supply failure signal is allowed to go HIGH by the power supply.
Signal Type
FAIL = High
FAIL = Low
Logic level low voltage, Isink=4ma
Logic level high voltage, Isink=50µA
Sink current, FAIL = low
Sink current, FAIL = high
FAIL rise and fall time
4.2.6.5 Predictive Failure Signal
This signal indicates that the power supply (or power supply fan) is reaching its end of life. The
signal indicates a predictive failure when HIGH.
Signal Type (Active Low)
PRFL = High
PRFL = Low
Logic level low voltage, Isink=4mA
Logic level high voltage, Isink=50µA
Sink current, FAIL = low
Sink current, FAIL = high
PRFL rise and fall time
Revision 1.11
Table 29: FAIL Signal Characteristics
Open collector/drain output from power supply. Pull-
Failed
OK
MIN
0V
Table 30: PRFL Signal Characteristics
Open collector/drain output from power supply. Pull-
Failing
OK
MIN
0V
Intel reference number 10736
up to VSB located system.
MAX
0.4V
5.25V
4ma
50µA
100µsec
up to VSB located in system.
MAX
0.4V
5.25V
4mA
50µA
100µsec
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