LM3S6422 Luminary Micro, Inc, LM3S6422 Datasheet - Page 442

• Manufacturer Part Number: LM3S6422
• Description: Lm3s6422 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Electrical Characteristics
442
Table 19-16. 10BASE-T Transmitter Characteristics (informative)
a. The specifications in this table are included for information only. They are mainly a function of the external transformer
Table 19-17. 10BASE-T Receiver Characteristics
Table 19-18. Isolation Transformers
a. Two simple 1:1 isolation transformers are required at the line interface. Transformers with integrated common-mode
Note:
Table 19-19. Ethernet Reference Crystal
Parameter Name
Output return loss
Output impedance balance
Peak common-mode output voltage
Common-mode rejection
Common-mode rejection jitter
Parameter Name
DLL phase acquisition time
Jitter tolerance (pk-pk)
Input squelched threshold
Input unsquelched threshold
Differential input resistance
Bit error ratio
Common-mode rejection
Turns ratio
Open-circuit inductance
Leakage inductance
Inter-winding capacitance
DC resistance
Insertion loss
HIPOT
and termination resistors used for measurements.
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
Frequency tolerance
Oscillation mode
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
500
275
30
25
-
-
-
Value
1500
Nom
10
600
350
10
20
29-17log(f/10)
-
-
-10
Max
700
425
Min
15
-
-
-
-
-
@ 10 mV, 10 kHz
-
-
-
@ 1 MHz (min)
Preliminary
mVppd
mVppd
a
Condition
0-65 MHz
Unit
BT
kΩ
+/- 5%
ns
V
Vrms
-
Parallel resonance, fundamental mode
Nom
a
-
-
-
-
-
Max
100
50
1
-
-
Unit
mV
mV
25.00000
dB
dB
ns
Value
±50
±2
±5
±5
a
Condition
PPM/yr
PPM
PPM
PPM
MHz
July 25, 2008