PT AMC123, User Manual

Page: 94 / 104

Chapter 7: Specifications
94
Absolute Maximum Ratings
Absolute maximum ratings are limits beyond which permanent damage to the module may
occur or module reliability may be affected. Stressing the AMC123 beyond the “absolute
maximum ratings” may cause permanent damage.
The values shown below are stress ratings only. Do not operate the AMC123 at these
maximums. See
“DC Operating Characteristics,” on page 94 , for operating conditions.
Supply Voltage, Vcc12 (+12 V): 10-14 V
Supply Voltage, Vcc3 (+3.3 V): 3.0-3.6 V
Storage (Non-operating) Temperature: -40 ° C to +85 ° C (-40° F to 185° F)
Non-Condensing Relative Humidity: <95% at 40 ° C (104° F)
Environmental Parameters
The operating temperature range is 0° C to 70° C (32º F to 158° F). The AMC123 comes from
the factory with an integrated heat sink for cooling the processor. The heat sink requires 300
LFM of airflow.
Caution:
External airflow must be provided at all times during operation to avoid damaging the CPU
module. PT strongly recommends use of a card rack fan tray to supply the external airflow.
See Chapter 8, “Thermal Considerations,” on page 97 for more information about module
cooling mechanisms.
DC Operating Characteristics
Table 7-1, “Power Consumption with 1.2 GHz Processor,” shows power consumption of an
AMC123 with a 1.2 GHz Intel EP80579 Integrated Processor with 2GB DDR2-800 SDRAM
installed.
Battery Backup Characteristics
The battery backup circuit on the AMC123 contains two ML621 manganese lithium batteries
that are charged during normal operation and are used only when power is not applied to the
module. The battery operates from -20°C to +60°C under normal operating conditions. Fully
charged batteries can keep the battery-backed portions of the AMC123 powered for >60 days.
For ensuring discharged batteries are restored to a fully charged state, ensure power is applied
for more than 30 hours.
Table 7-1: Power Consumption with 1.2 GHz Processor
Voltage (VDC) Maximum Power (W)
12 V, (10 - 14 V) 30 W
3.30 V, (3.0 - 3.6 V) 0.35 W
Total Power 30.35 W