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Thales Computers 2-13 CPMC-1553R User’s Guide, CA.DT.356-0e
2.4 Power Requirements
The CPMC-1553R uses 3.3 volts and 5 volts power. VIO, +12 volts, and –12 volts are not used. The 3.3
volt supply powers the PCI interface and the 5 volt supply powers each of the ACEs. Typical current draw
is at 25°C at the “Typical” power voltages. The “Maximum” current draw is over the worse case condition
of voltage and temperature. Table 12 shows the power specifications for the board. Note that I
5V0
is for
each ACE installed. With two ACE chips installed double I
5V0
.
Table 12. Power Requirements
Symbol Description Minimum Typical Maximum Units
3V3 3.3V Logic Power 3.00 3.30 3.60 V
5V0 5.0V Logic Power 4.75 5.00 5.25 V
I
3V3
Current draw, 3.3V supply .090 .120 A
I
5V0
Current draw per ACE, 5.0V supply
Idle .095 .200
25% transmitter duty cycle .245 .200
50% transmitter duty cycle .360 .500
100% transmitter duty cycle .590 .800
A