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Physical Environment 3-3
3.1.2 Electrical Characteristics
The LSI21003 maximum power requirements, which include SCSI
TERMPWR, under normal operation are listed in Ta bl e 3. 1:
The PCI PRSNT1# and PRSNT2# pins are set to indicate a 15 W maximum
configuration.
Under abnormal conditions, such as a short on SCSI TERMPWR,
+5 V current may be higher. At temperatures of at least 25
°C, a current
of 3 A is sustained no longer than ten seconds before the self-resetting
TERMPWR short circuit protection device opens.
3.1.3 Thermal, Atmospheric Characteristics
The board is designed to operate in an environment, which is defined by
the following parameters:
• Temperature range: 0 to 55 °C (dry bulb)
• Relative humidity range: 5% to 90% (noncondensing)
• Maximum dew point temperature: 32 °C
The board is designed for a storage and transit environment, which is
defined by the following parameters:
• Temperature range: −45 °Cto+105°C (dry bulb)
• Relative humidity range: 5% to 90% (noncondensing)
3.1.4 Electromagnetic Compliance
The board is designed and implemented so as to minimize
electromagnetic emissions, susceptibility, and the effects of electrostatic
discharge. The board carries the CE mark, C-Tick mark, FCC
Self Certification logo, Canadian Compliance Statement, and meets the
requirements of FCC and CISPR Class B.
Table 3.1 Maximum Power Requirements
+5 V DC ±5% 1.5 A Over the operating range 5 °Cto55°C