Intel® Server Board SDS2 Electrical and Thermal Specifications

Revision 1.2

Order Number: A85874-002 97

Figure 13. Output Voltage Timing

Table 85: Turn On/Off Timing

Item Description Min Max Units
Tsb_on_delay Delay from AC being applied to 5VSB being within regulation. 2000 msec
T ac_on_delay Delay from AC being applied to all output voltages being within
regulation. 2500 msec
Tvout_holdup Time all output voltages stay within regulation after loss of AC. 21 msec
Tpwok_holdup Delay from loss of AC to de-assertion of PWOK 20 msec
Tpson_on_delay Delay from PSON# active to output voltages within regulation limits. 5 400 msec
T pson_pwok Delay from PSON# deactive to PWOK being de-asserted. 50 msec
Tpwok_on Delay from output voltages within regulation limits to PWOK asserted at
turn on. 100 500 msec
T pwok_off Delay from PWOK de-asserted to output voltages (3.3V, 5V, 12V, -12V)
dropping out of regulation limits. 1 msec
Tpwok_low Duration of PWOK being in the de-asserted state during an off/on cycle
using AC or the PSON signal. 100 msec
Tsb_vout Delay from 5VSB being in regulation to O/Ps being in regulation at AC
turn on. 50 1000 msec

Electrical and Thermal Specifications Intel® Server Board SDS2

Revision 1.2

Order Number: A85874-002

100

10.4 Estimateded Server Board MTBF

The estimated Mean-Time Between Failures (MTBF) is calculated at 103,996 hours at a maximum operating temperature of 35 C.

The table below shows the calculated numbers.

Table 87. Estimated SDS2 Server Board MTBF

Sub-assembly
Description
Sub-assembly Quantity
Assembly Temperature
Accel Valid? (Drives-0)
Sub-assembly MTBF
Quote (Hours)
Sub-assembly
Temperature Quote I
Sub-assembly Duty
Cycle Quote (%)
Duty Cycle as used in
System (%)
Sub-assembly
Temperature in System
I
Sub-assembly MTBF
from Quote (Hours)
Assembly Quote to
Internal Temperature
Acc Fact
Sub-assembly Duty
Cycle Acc Fact
Total Sub-assembly
MTBF (Hours)
Total Sub-assembly
Failure Rate (FITs)
Baseboard 1 1 83,188 55 100 100 50 83,188 1.250 1.00 103,996 9,616
Total Failure Rate (FITs) 9,616
MTBF (hours) 103,996