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 I5V0 is for
each ACE installed. With two ACE chips installed double I5V0.
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
I3V3 Current draw, 3.3V supply .090 .120 A
I5V0 Current draw per ACE, 5.0V supplyIdle .095 .200
25% transmitter duty cycle .245 .200
50% transmitter duty cycle .360 .500
100% transmitter duty cycle .590 .800
A