Intel® IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
When 170 nF is an inconvenient size, capacitor values between 150 nF to 200 nF could be used
with little adverse effects, assuming that the effective series resistance of the 200-nF capacitor is
under 50 mΩ.
In order to achieve a 200-nF capacitance, a parallel combination of two 100-nF capacitors may be
used as long as the capacitors are placed directly beside each other. V
consists of two pins,
SSP_OSC
AD10 and AF10. Ensure that both pins are connected as shown in Figure 11.
Figure 11.
V
Power Filtering Diagram
CCOSCP
3.3 V
VCCOSCP
Intel® IXP42X
Product Line /
Intel® IXC1100
Control Plane
Processor
170 nF
VSSOSCP
VSSOSCP
VSS
B1675-04
5.2.4
V
Requirement
CCOSC
A parallel combination of a 10-nF capacitor — for bypass — and a 200-nF capacitor — for a first-
order filter with a cut-off frequency below 33 MHz — must be connected to both of the V
CCOSC
pins of the IXP42X product line and IXC1100 control plane processors.
The grounds of both capacitors should be connected to the V
supply pin. Both capacitors
SSOSC
should be located less than 0.5 inch away from the V
pin and the associated V
pin.
CCOSC
SSOSC
In order to achieve a 200-nF capacitance, a parallel combination of two 100-nF capacitors may be
used as long as the capacitors are placed directly beside each other.
Figure 12.
V
Power Filtering Diagram
CCOSC
1.3 V
Intel® IXP42X
Product Line /
Intel® IXC1100
Control Plane
Processor
10 nF
100 nF
100 nF
VSS
B1676-03
March 2005
84
Datasheet
Document Number: 252479, Revision: 005
INTEL [ INTEL ]
