LM3S6610 Luminary Micro, Inc, LM3S6610 Datasheet - Page 529

• Manufacturer Part Number: LM3S6610
• Description: Lm3s6610 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

July 25, 2008
Table 22-19. Isolation Transformers
a. Two simple 1:1 isolation transformers are required at the line interface. Transformers with integrated common-mode
Note:
Table 22-20. Ethernet Reference Crystal
a. If the internal crystal oscillator is used, select a crystal with the following characteristics.
Parameter Name
Common-mode rejection
Turns ratio
Open-circuit inductance
Leakage inductance
Inter-winding capacitance
DC resistance
Insertion loss
HIPOT
Parameters at 25° C ±2° C; Drive level = 0.5 mW
chokes are recommended for exceeding FCC requirements. This table gives the recommended line transformer
characteristics.
Temperature stability (-40° to 105°)
Temperature stability (-40° to 85°)
The 100Base-TX amplitude specifications assume a transformer loss of 0.4 dB. For the
transmit line transformer with higher insertion losses, up to 1.2 dB of insertion loss can be
compensated by selecting the appropriate setting in the Transmit Amplitude Selection (TXO)
bits in the MR19 register.
Name
Motional capacitance (min)
Spurious response (max)
Shunt capacitance (max)
Serious resistance (max)
Frequency tolerance
Oscillation mode
Drive level (typ)
Frequency
Name
Aging
0.9 Ohm (max)
0.40 uH (max)
350 uH (min)
25 pF (max)
1 CT : 1 CT
0.4 dB (typ)
Min
25
Value
1500
Nom
-
Max
-
@ 10 mV, 10 kHz
@ 1 MHz (min)
Preliminary
a
Condition
0-65 MHz
Unit
+/- 5%
V
Vrms
Parallel resonance, fundamental mode
a
> 5 dB below main within 500 kHz
25.00000
50-100
Value
±50
±2
±5
±5
10
10
60
LM3S6610 Microcontroller
Condition
PPM/yr
PPM
PPM
PPM
MHz
µW
pF
fF
Ω
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