LM3S8971 Datasheet, PDF (541/577 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S8971 Microcontroller
Parameter Name
Signal detect assertion time
Signal detect de-assertion time
Min Nom Max Unit
- - 1000 µs
- - 4 µs
Table 23-15. 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 23-16. 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 23-17. 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 23-18. Isolation Transformers^a
Name
Value
Condition
Turns ratio
1 CT : 1 CT
+/- 5%
Open-circuit inductance 350 uH (min) @ 10 mV, 10 kHz
Leakage inductance
0.40 uH (max) @ 1 MHz (min)
Inter-winding capacitance 25 pF (max)
DC resistance
0.9 Ohm (max)
Insertion loss
0.4 dB (typ)
0-65 MHz
October 01, 2007
541
Preliminary