ocx160 ETC-unknow, ocx160 Datasheet - Page 40

• Manufacturer Part Number: ocx160
• Description: Ocx160 Crosspoint Switch
• Manufacturer: ETC-unknow

6. Power Consumption
OCX160 Crosspoint Switch—Preliminary Data Sheet
6.1 Power for LVDS I/O
40
Example: Worst Case = (4mW x 80) + (0.015 mW x 667 x 80) + (4mW x 80)
There are two main factors to consider when calculating power consumption for the OCX160:
The first component, chip power, consists of three integral elements (refer to Figure 22):
The second component, termination power, is the power dissipated by the terminating resistors at the
switch differential outputs. The value is zero if the Output Enable (OE#) is disabled or set to OFF.
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 [Chip Power +
Termination Power].
• Power consumed by the chip
• Power dissipated by the terminating resistors at the switch differential outputs
1. Input Power—This element is fixed (always ON) due to the DC current for differential outputs.
2. Core Power—This element is the same for LVDS or LVPECL outputs. Core power is a function of
3. Ouput Power—This element is a fixed amount for each differential output. The value is zero if the
(always ON)
data rate (Mb/s) and the number of connection paths through the switch matrix.
Output Enable (OE#) is disabled or set to OFF.
4mW/Input
Power
Input
Figure 22 Power Consumption Diagram for the OCX160 using LVDS
320mW
+
0.015mW/Mbs/Connection
+
Chip Power
Power
Switch
Core
Matrix
Chip Power
800mW
[Rev. 1.6] 2/20/01
+
=
= 2.72 watts (total power consumption)
+
CLK
1440mW
4mW/Output
320mW
Output
Power
Output
Buffer
+
+
+
+
Termination Power
+
(16mW x 80)
Termination Power
1280mW
1280mW
16mW/Output (Load)
R
R
Termination
S
S
Power
R
DIV
I-Cube, Inc.