Data Sheet

Ethernet Controller I210 —Electrical/Mechanical Specification
800
11.6.5.2 External Clock Oscillator Specifications
When using an external oscillator the following connection must be used.
Figure 11-9. External Clock Oscillator Connectivity to The I210
Operating Temperature T
opr
0 to +70 [°C]
-40 to +85 [°C]
Commercial grade
Industrial grade
Non Operating Temperature Range T
opr
-30 to +85 [°C]
Equivalent Series Resistance (ESR) R
s
50 [] maximum @25 [MHz]
Shunt Capacitance C
o
6 [pF] maximum
Load Capacitance C
load
16 to 18 pF
Max Drive Level D
L
0.5 [mW]
Aging f/f
o
±5 [ppm/year]
External Capacitors C
1
, C
2
27 [pF]
Table 11-16. Specification for XTAL1 (In)
Parameter Name Symbol Value Conditions
Voltage Input High (minimum) VIH (min) 1.4 [V]
Voltage Input High (maximum) VIH (max) 2.0 [V]
Target XTAL1 (In) amplitude VIH (typ) 1.7 [V]
Voltage Input Low (maximum) VIL (max) 200 [mV]
Input Impedance High impedance
Table 11-17. Specification for External Clock Oscillator
Parameter Name Symbol Value Conditions
Frequency f
o
25.0 [MHz] @25 [°C]
External OSC Supply Swing V
p-p
2.5 ± 0.25 [V] or 3.3 ± 0.33 [V]
Table 11-15. Specification for External Crystal (Continued)
Parameter Name Symbol Recommended Value Conditions
XTAL1 (In)
XTAL2 (Out)
VCC = 2.5V or 3.3V
External Clock
Oscillator
C1 = 100pF or 51pF
C2 = 47pF