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SE7221BK1-E Technical Product Specification
73
Table 85. Absolute Maximum Ratings
Operating Temperature
5 °C to 50 °C
1
Storage Temperature
-55 °C to +150 °C
Voltage on any signal with respect to ground -0.3 V to Vdd + 0.3V
2
3.3 V Supply Voltage with Respect to ground -0.3 V to 3.63 V
5 V Supply Voltage with Respect to ground -0.3 V to 5.5 V
Notes:
1. Chassis design must provide proper airflow to avoid exceeding the processor maximum case
temperature.
2. VDD means supply voltage for the device
11.1 Mean Time Between Failures (MTBF) Test Results
This section provides results of MTBF testing done by a 3
rd
party testing facility. MTBF is a
standard measure for the reliability and performance of the board under extreme working
conditions. For the SE7221BK1-E server board, MTBF was measured at 190,727 hours at 40
degrees Centigrade.
12. Hardware Monitoring
12.1 Monitored Components
The Intel® Server Board SE7221BK1-E has an integrated LM96000 chip that is responsible for
hardware monitoring. The LM96000 chip provides basic server hardware monitoring which
alerts a system administrator if a hardware problem occurs on the board. The NS super IO
PC87427 has implemented some FAN speed control/monitor pins. Below is a table of monitored
headers and sensors on the board.
Table 86. Monitored Components
Item Description
Voltage
P_VCC (PIN #24) Monitors processor voltage LM96000
P12V (PIN #21) Monitors +12Vin for system +12V supply LM96000
P1V8 (PIN #22) Monitors 1.8V DDRII power LM96000
P5V (PIN #20) Monitors +5V LM96000
Fan Speed
PWM1 (PIN #24) Controls system front fans
(JP5J1,JP5J2,JP7A1,JP6A1,J6J3,J6J1,J6J4,J6J2)
LM96000
PWM2 (PIN #10) Controls CPU fans (J7A1) LM96000
PWM3 (PIN #13) N/A LM96000
TACH1 (PIN #11) Monitors CPU fan (J7A1) LM96000
TACH2 (PIN #12) Monitors SYS FAN_3 (JP5J1) LM96000
TACH3 (PIN #9) Monitors SYS FAN_4 (JP5J2) LM96000