KSZ9031MNX Datasheet, PDF (53/73 Pages) Micrel Semiconductor – The KSZ9031MNX is a completely integrated triple-speed (10Base-T/100Base-TX/1000Base-T) Ethernet physicallayer transceiver for transmission and reception of data on standard CAT-5 unshielded twisted pair (UTP) cable.

KSZ9031MNX
TABLE 6-6: PULL-UP PINS
Parameters
Symbol Min. Typ. Max. Units
Internal Pull-Up Resistance
(MDC, MDIO,
pu
RESET_N pins)
13
22
31
16
28
39
kΩ
26
44
62
Note
DVDDH (digital I/O) = 3.3V
DVDDH (digital I/O) = 2.5V
DVDDH (digital I/O) = 1.8V
TABLE 6-7: 100BASE-TX TRANSMIT (Note 6-1)
Parameters
Peak Differential Output
Voltage
Symbol
V_O
Min.
0.95
Typ.
—
Max.
1.05
Output Voltage Imbalance
V_IMB
—
—
2
Rise/Fall Time
t_r, t_f
Rise/Fall Time Imbalance
—
3
—
5
0
—
0.5
Duty Cycle Distortion
—
—
— ±0.25
Overshoot
—
—
—
5
Output Jitter
—
—
0.7
—
Note 6-1 Measured differentially after 1:1 transformer.
Units
V
%
ns
ns
ns
%
ns
Note
100Ω termination across differential
output
100Ω termination across differential
output
—
—
—
—
Peak-to-peak
TABLE 6-8: 10BASE-T TRANSMIT (Note 6-1)
Parameters
Symbol Min. Typ. Max.
Peak Differential Output
Voltage
V_P
Jitter Added
—
2.2
—
2.8
—
—
3.5
Harmonic Rejection
—
—
–31
—
Note 6-1 Measured differentially after 1:1 transformer.
Units
V
ns
dB
Note
100Ω termination across differential
output
Peak-to-peak
Transmit all-one signal sequence
TABLE 6-9: 10BASE-T RECEIVE
Parameters
Squelch Threshold
Symbol
V_SQ
Min.
300
Typ.
400
Max. Units
—
mV
Note
5 MHz square wave
TABLE 6-10: TRANSMITTER - DRIVE SETTING
Parameters
Reference Voltage of I_SET
Symbol
V_SET
Min.
—
Typ.
1.2
Max. Units
—
V
Note
R(I_SET) = 12.1 kΩ
TABLE 6-11: LDO CONTROLLER - DRIVE RANGE
Parameters
Symbol Min. Typ. Max.
Output drive range for
0.85
—
2.8
LDO_O (Pin 58) to gate
input of P-channel
MOSFET
V_{LDO_O}
0.85
—
2.0
Units
V
Note
AVDDH = 3.3V for MOSFET source
voltage
AVDDH = 2.5V for MOSFET source
voltage (recommended for commer-
cial temperature range operation only)
 2016 Microchip Technology Inc.
DS00002096C-page 53