
Micrel, Inc.
KSZ8851SNL/SNLI
August 2009
72
M9999-083109-2.0
Electrical Characteristics
(4, 5)
Symbol
Parameter
Condition
Min
Typ
Max
Units
100BaseTX Transmit (measured differentially after 1:1 transformer)
VO
Peak Differential Output Voltage
100
Ω termination on the diff. output
±0.95
±1.05
V
Vimb
Output Voltage Imbalance
100
Ω termination on the diff. output
2
%
tr, / tf
Rise/Fall Time
3
5
ns
Rise/Fall Time Imbalance
0
0.5
ns
Duty Cycle Distortion
±0.25
ns
Overshoot
5
%
VSET
Reference Voltage of ISET
0.5
V
Output Jitter
Peak-to-peak
0.7
1.4
ns
10BaseT Receive
Vsq
Squelch Threshold
5MHz square wave
400
mV
10BaseT Transmit (measured differentially after 1:1 transformer)
Vp
Peak Differential Output Voltage
100
Ω termination on the differential output
2.2
2.5
2.8
V
Jitter Added
100
Ω termination on the differential output
(Peak-to-peak)
1.8
3.5
ns
Table 15. Electrical Characteristics
Notes:
5.
Single Port’s transformer consumes an additional 45mA @3.3V for 100BASE-TX and 70mA @3.3V for 10BASE-T.
6.
Single Port’s transformer consumes less than 1mA during the Power Saving Mode.