Oscillators For 82541Pi Controllers - Intel 82541PI Design Manual

Table 15. Electrical Specifications at 25
Insertion Loss (TX / RX)
0.1 through 999 kHz
1.0 through 60.0 MHz
60.1 through 80.0 MHz
80.1 through 100.0 MHz
100 through 125.0 MHz
Return Loss (TX / RX)
1.0 through 40.0 MHz
40.1 through 100 MHZ
Common Mode-to-Common Mode Rejection
1.0 through 60 MHz
60.1 through 100 MHz
100.1 through 150 MHz
Differential-to-Common Mode Rejection
1.0 through 60 MHz
60.1 through 100 MHz
100.1 through 150 MHz
Crosstalk Isolation (TX / RX)
1.0 through 80 MHz
80.1 through 150 MHz
High Voltage Isolation
1500 Vrms minimum, at 50 to 60 Hz, for 60 sec.
OCL with 8 mA Bias
3.6.9

Oscillators for 82541PI Controllers

The 82541PI clock input circuit is optimized for use with an external crystal. However, an
oscillator may also be used in place of the crystal with the proper design considerations (see
Table 17):
•
The clock oscillator has an internal voltage regulator of 1.2 V to isolate it from the external
noise of other circuits to minimize jitter. If an external clock is used, this imposes a maximum
input clock amplitude of 1.2 V.
•
The input capacitance introduced by the 82541PI (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 82541PI clock and its performance.
Application Note (AP-468)
82541PI(ER) and 82562GZ(GX) Dual Footprint LOM Design Guide
°
C for 1000 Gb Silicon
1.0 dB maximum
0.6 dB maximum
0.8 dB maximum
1.0 dB maximum
2.4 dB maximum
18 dB minimum
12 - [20Log(f/80 MHz)] dB minimum
48 dB minimum
42 dB minimum
37 dB minimum
35 dB minimum
29 dB minimum
22 dB minimum
36 dB minimum
27dB minimum
2250 V dc for 60 seconds
400 uH minimum
21