gwixp425bdt Intel Corporation, gwixp425bdt Datasheet - Page 91

• Manufacturer Part Number: gwixp425bdt
• Description: Intel Xp42x Product Line Of Network Processors And Ixc1100 Control Plane Processor
• Manufacturer: Intel Corporation

5.4.14
Table 38.
5.5
5.5.1
5.5.1.1
Table 39.
Datasheet
Reset DC Parameters
PWRON_RESET_N DC Parameters
AC Specifications
Clock Signal Timings
Processor Clock Timings
Crystal oscillators require that good system-level design practices be followed for reliable start-up
and oscillation. Please refer to the Intel
IXC1100 Control Plane Processor Product Line: Crystal Design Considerations Application Note
(Document Number 305588), and contact Intel for the recommended Intel
of Network Processors and IXC1100 Control Plane Processor part number optimized for use with
crystal oscillators.
Device Clock Timings
Notes:
1.
2.
3.
4.
7
T
Symbol
FREQUENCY
Intel
FREQUENCY
Symbol
C
C
V
V
I
SHUNT
IL
IH
V
C
IL
IN
V
IH
IL
IN
®
This value could be an oscillator input or a series resonant frequency from a crystal. If used as an
oscillator input, tie to the crystal input pin and leave the crystal output pin disconnected.
Use the component values recommended by the crystal manufacturer.
This parameter applies when driving the clock input with an oscillator.
Where the IXP42X product line or IXC1100 control plane processor is configured with an input
reference-clock, the slew rate should never be faster than 2.5 V/nS to ensure proper PLL operation.
To help ensure proper PLL operation at the slower slew rate, the VIH and VIL voltage levels need to
be within the specified range at an input clock frequency of 33.33 MHz.
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
Input-high voltage
Input-low voltage
Input leakage current
Input Capacitance
Input-high voltage
Input-low voltage
Clock frequency for IXP42X product line
and IXC1100 control plane processors
crystal or oscillator.
Clock tolerance over -40º C to 85º C.
Pin capacitance of IXP42X product line and
IXC1100 control plane processors’ inputs.
C
referred to as the holder capacitance.
SHUNT
Parameter
Document Number: 252479, Revision: 005
is a crystal parameter sometimes
(Oscillator Reference) (Sheet 1 of 2)
Parameter
0 < V
1.3V
Conditions
IN
®
<
IXP42X Product Line of Network Processors and
Min.
-500
1.0
Typ.
Min.
-50
2.0
2
Max.
1.3
0.3
10
1
Nom.
33.33
5
3
Units
µA
pF
V
V
®
Max.
0.8
IXP42X Product Line
50
4
The input voltage
must not exceed
1.3V or long-term
reliability may be
adversely affected.
Simulated results.
Units
MHz
ppm
pF
pF
March 2005
V
V
Notes
Notes
1,
4
91