LM3S6950 Datasheet, PDF (490/524 Pages) List of Unclassifed Manufacturers – Microcontroller

Electrical Characteristics
Table 22-13. 100BASE-TX Receiver Characteristics
Parameter Name
Min Nom Max Unit
Signal detect assertion threshold 600 700
mVppd
Signal detect de-assertion threshold 350 425 - mVppd
Differential input resistance
20 - - kΩ
Jitter tolerance (pk-pk)
4 - - ns
Baseline wander tracking
-75 - +75 %
Signal detect assertion time
- - 1000 µs
Signal detect de-assertion time
- - 4 µs
Table 22-14. 10BASE-T Transmitter Characteristics^a
Parameter Name
Min Nom Max Unit
Peak differential output signal 2.2 - 2.8 V
Harmonic content
27 - - dB
Link pulse width
- 100 - ns
Start-of-idle pulse width
- 300 - ns
350
a. The Manchester-encoded data pulses, the link pulse and the start-of-idle pulse are tested against the templates and using
the procedures found in Clause 14 of IEEE 802.3.
Table 22-15. 10BASE-T Transmitter Characteristics (informative)^a
Parameter Name
Min
Nom Max Unit
Output return loss
15
- - dB
Output impedance balance
29-17log(f/10) - - dB
Peak common-mode output voltage
-
- 50 mV
Common-mode rejection
-
- 100 mV
Common-mode rejection jitter
-
- 1 ns
a. The specifications in this table are included for information only. They are mainly a function of the external transformer
and termination resistors used for measurements.
Table 22-16. 10BASE-T Receiver Characteristics
Parameter Name
Min Nom Max Unit
DLL phase acquisition time - 10 - BT
Jitter tolerance (pk-pk)
30 - - ns
Input squelched threshold 500 600 700 mVppd
Input unsquelched threshold 275 350 425 mVppd
Differential input resistance - 20 - kΩ
Bit error ratio
- 10^-10 -
-
Common-mode rejection 25 - - V
Table 22-17. Isolation Transformers^a
Name
Turns ratio
Open-circuit inductance
Value
Condition
1 CT : 1 CT
+/- 5%
350 uH (min) @ 10 mV, 10 kHz
490
June 14, 2007
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