ocx256 ETC-unknow, ocx256 Datasheet - Page 43

• Manufacturer Part Number: ocx256
• Description: Ocx256 Crosspoint Switch
• Manufacturer: ETC-unknow

6. Power Consumption
Fairchild Semiconductor
6.1 Power for OCX256L (LVDS)
Chip power consists of three integral elements (refer to Figure 20):
The following diagram shows the chip power elements (as described above), the formulas used for
determining chip power, and the total power consumption as determined by the formula.
1. Input Power—This element has two components:
2. Core Power—Core power is a function of data rate (Mb/s) and the number of connection paths
3. Output Power—This element is a fixed amount for each differential output. The value is zero if the
(512mW + 6.5mW/Input
through the switch matrix.
Output Enable (OE#) is disabled or set to OFF.
Example: Worst Case = (512mW + 832mW) + (0.015 mW x 667 x 128) + (20mW x 128)
•
•
a steady state component that is always ON, and
a component that is based on the number of inputs being used.
(always ON)
Figure 20 Power Consumption Diagram for the OCX256L using LVDS
Power
Input
+
OCX256 Crosspoint Switch—Advanced Datasheet
0.015mW/Mbs/Connection
[Rev. 2.0] 3/21/02
1344mW
Power
Switch
Matrix
Core
+
= 5.18 watts
1280mW
OE#
+
20mW/Output
Output
Power
Output
Buffer
+
2560mW
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