Micrel, Inc.
KSZ8021RNL / KSZ8031RNL
August 2010
34
M9999-082710-1.0
Electrical Characteristics
(3) (Continued)
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
100Base-TX Transmit (measured differentially after 1:1 transformer)
VO
Peak Differential Output Voltage
100
Ω Termination Across Differential Output
0.95
1.05
V
VIMB
Output Voltage Imbalance
100
Ω Termination Across Differential Output
2
%
Rise/Fall Time
3
5
Rise/Fall Time Imbalance
0
0.5
Duty-Cycle Distortion
+ 0.25
ns
tr, tf
Overshoot
5
%
VSET
Reference Voltage of ISET
0.65
V
Output Jitter
Peak-to-Peak
0.7
1.4
ns
10Base-T Transmit (measured differentially after 1:1 transformer)
VP
Peak Differential Output Voltage
100
Ω Termination Across Differential Output
2.2
2.8
V
Jitter Added
Peak-to-Peak
3.5
ns
tr, tf
Rise/Fall Time
25
ns
10Base-T Receive
VSQ
Squelch Threshold
5MHz Square Wave
400
mV
REF_CLK Output
50MHz RMII Clock Output Jitter
Peak-to-Peak
(Applies to RMII – 50MHz Clock Mode only)
600
ps
Notes:
1. Exceeding the absolute maximum rating may damage the device. Stresses greater than the absolute maximum rating may cause permanent
damage to the device. Operation of the device at these or any other conditions above those specified in the operating sections of this specification is
not implied. Maximum conditions for extended periods may affect reliability.
2. The device is not guaranteed to function outside its operating rating.
3. TA = 25°C. Specification is for packaged product only.
4. Current consumption is for the single 3.3V supply KSZ8021/31RNL device only, and includes the transmit driver current and the 1.2V supply voltage
(VDD_1.2) that are supplied by the KSZ8021/31RNL.