Micrel, Inc.
KSZ9021RL/RN
Symbol
Parameter
Condition
Min
Typ
Max
Units
Supply Current – Transceiver (equivalent to current draw through external transformer center taps for PHY transceivers with
current-mode transmit drivers)
IAVDDH
3.3V for transceiver
1000Base-T Link-up (no traffic)
75
75
29
29
35
43
36
2
mA
mA
mA
mA
mA
mA
mA
mA
mA
1000Base-T Full-duplex @ 100% utilization
100Base-TX Link-up (no traffic)
100Base-TX Full-duplex @ 100% utilization
10Base-T Link-up (no traffic)
10Base-T Full-duplex @ 100% utilization
Power Saving Mode (cable unplugged)
Software Power Down Mode (register 0.11 =1)
Chip Power Down Mode
1
(strap-in pins MODE[3:0] = 0111)
TTL Inputs
VIH
VIL
IIN
Input High Voltage
Input Low Voltage
Input Current
2.0
2.4
V
V
0.8
10
VIN = GND ~ VDDIO
-10
µA
TTL Outputs
VOH
VOL
|Ioz|
Output High Voltage
IOH = -4mA
IOL = 4mA
V
V
Output Low Voltage
0.4
10
Output Tri-State Leakage
µA
100Base-TX Transmit (measured differentially after 1:1 transformer)
VO
Peak Differential Output Voltage
Output Voltage Imbalance
Rise/Fall Time
0.95
1.05
V
%
ns
ns
ns
%
100Ω termination across differential output
100Ω termination across differential output
VIMB
tr, tf
2
5
3
0
Rise/Fall Time Imbalance
Duty Cycle Distortion
Overshoot
0.5
± 0.25
5
VSET
Reference Voltage of ISET
Output Jitter
R(ISET) = 4.99K
Peak-to-peak
0.535
0.7
V
1.4
ns
10Base-T Transmit (measured differentially after 1:1 transformer)
VP
Peak Differential Output Voltage
Jitter Added
2.2
2.8
3.5
V
100Ω termination across differential output
Peak-to-peak
ns
dB
Harmonic Rejection
Transmit all-one signal sequence
-31
10Base-T Receive
VSQ
Squelch Threshold
5MHz square wave
300
400
mV
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.
M9999-101309-1.1
October 2009
47
MICREL [ MICREL SEMICONDUCTOR ]
