82583V Datasheet, PDF (332/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

82583V GbE Controller—Design Considerations
Note:
• The input capacitance introduced by the 82583V (approximately 20 pF) is greater
than the capacitance specified by a typical oscillator (approximately 15 pF).
• The input clock jitter from the oscillator can impact the 82583V clock and its
performance.
The power consumption of additional circuitry equals about 1.5 mW.
Table 57 lists oscillators that can be used with the 82583V. Please note that no
particular oscillator is recommended):
Table 57.
Oscillator Manufacturers and Part Numbers
Manufacturer
NDK AMERICA INC
TXC CORPORATION - USA
CITIZEN AMERICA CORP
Raltron Electronics Corp
MtronPTI
Kyocera Corporation
Part No.
2560TKA-25M
6N25000160 or
7W25000025
CSX750FJB25.000M-UT
CO4305-25.000-T-TR
M214TCN
KC5032C-C3
3.3 V dc
CLK
Oscillator
VDD3p3
Out
C1
1 K ohm
1 K ohm
1000 pF
82583V
XTAL1
Figure 52. Oscillator Solution
11.4.1
Oscillator Placement and Layout Recommendations
Oscillator clock sources should not be placed near I/O ports or board edges. Radiation
from these devices can be coupled into the I/O ports and radiate beyond the system
chassis. Oscillators should also be kept away from the Ethernet magnetics module to
prevent interference.
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