English
Language : 

82551IT Datasheet, PDF (84/102 Pages) Intel Corporation – Fast Ethernet PCI Controller
82551IT — Networking Silicon
Table 49. LED Voltage/Current Characteristics
Symbol
Parameter
VOHLED
VOLLED
Output High Voltage
Output Low Voltage
Condition
Iout = -10 mA
Iout = 10 mA
Min Typical Max
2.4
0.7
Units
V
V
Notes
Table 50. 100BASE-TX Voltage/Current Characteristics
Symbol
Parameter
Condition
RID100
VIDA100
VIDR100
VICM100
VOD100
ICCT100
Input Differential
Impedance
DC
Input Differential
Accept Peak Voltage
Input Differential
Reject Peak Voltage
Input Common Mode
Voltage
Output Differential
Peak Voltage
Line Driver Supply
Peak Current
RBIAS100 = 649 
Min Typical Max
10
±500
±100
VCC/2
0.95 1.00 1.05
20
Units
K
mV
mV
V
V
mA
Notes
1, 2, 3
NOTES:
1. Current is measured on all VCC pins (VCC = 3.3 V).
2. Transmitter peak current is attained by dividing the measured maximum differential output peak voltage by
the load resistance value.
3. Recommended starting value for RBIAS100.
78
Datasheet