LAN9303MI-AKZE Standard Microsystems (SMSC), LAN9303MI-AKZE Datasheet - Page 378
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LAN9303MI-AKZE
Manufacturer Part Number
LAN9303MI-AKZE
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LAN9303MI-AKZE.pdf
(381 pages)
Specifications of LAN9303MI-AKZE
Lead Free Status / Rohs Status
Compliant
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Revision 1.4 (07-07-10)
14.6
Crystal Cut
Crystal Oscillation Mode
Crystal Calibration Mode
Frequency
Frequency Tolerance @ 25
Frequency Stability Over Temp
Frequency Deviation Over Time
Total Allowable PPM Budget
Shunt Capacitance
Load Capacitance
Drive Level
Equivalent Series Resistance
Operating Temperature Range
XI Pin Capacitance
XO Pin Capacitance
PARAMETER
The device can accept either a 25MHz crystal (preferred) or a 25MHz single-ended clock oscillator (+/-
50ppm) input. If the single-ended clock oscillator method is implemented, XO should be left
unconnected and XI should be driven with a nominal 0-3.3V clock signal. The input clock duty cycle
is 40% minimum, 50% typical and 60% maximum.
It is recommended that a crystal utilizing matching parallel load capacitors be used for the crystal
input/output signals (XI/XO). See
Note 14.22 The maximum allowable values for Frequency Tolerance and Frequency Stability are
Note 14.23 Frequency Deviation Over Time is also referred to as Aging.
Note 14.24 The total deviation for the Transmitter Clock Frequency is specified by IEEE 802.3 as
Note 14.25 0
Note 14.26 +70
Note 14.27 This number includes the pad, the bond wire and the lead frame. PCB capacitance is not
Clock Circuit
application dependant. Since any particular application must meet the IEEE +/-50 PPM
Total PPM Budget, the combination of these two values must be approximately +/-45 PPM
(allowing for aging).
+/- 50 PPM.
included in this value. The XO/XI pin and PCB capacitance values are required to
accurately calculate the value of the two external load capacitors. These two external load
capacitors determine the accuracy of the 25.000 MHz frequency.
o
C for commercial version, -40
o
C
o
C for commercial version, +85
SYMBOL
F
F
Table 14.20 Crystal Specifications
F
F
P
C
temp
C
R
fund
age
tol
W
O
L
1
Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII
Table 14.20
DATASHEET
Note 14.25
MIN
300
Parallel Resonant Mode
-
-
-
-
-
-
-
-
-
-
378
o
Fundamental Mode
C for industrial version.
for crystal specifications.
o
C for industrial version.
AT, typ
+/-3 to 5
25.000
20 typ
NOM
7 typ
3 typ
3 typ
-
-
-
-
-
-
Note 14.26
+/-50
+/-50
+/-50
MAX
30
-
-
-
-
-
-
-
SMSC LAN9303M/LAN9303Mi
UNITS
PPM
PPM
PPM
PPM
Ohm
MHz
uW
pF
pF
o
pF
pF
C
Note 14.22
Note 14.22
Note 14.23
Note 14.24
Note 14.27
Note 14.27
NOTES
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