LAN8700 Datasheet, PDF (62/74 Pages) SMSC Corporation – ±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWR TM in a Small Footprint

LAN8700/LAN8700i
TABLE 7-11: INTERNAL PULL-UP / PULL-DOWN CONFIGURATIONS (CONTINUED)
Name
Pull-up or Pull-down
RX_ER/RXD4
RX_DV
TX_EN
Pull-down
Pull-down
Pull-down
Note: For VDDIO operation below +2.5V, Microchip recommends designs add external strapping resistors in
addition the internal strapping resistors to ensure proper strapped operation.
TABLE 7-12: 100BASE-TX TRANSCEIVER CHARACTERISTICS
Parameter
Symbol
MIN
TYP
Peak Differential Output Voltage High
Peak Differential Output Voltage Low
Signal Amplitude Symmetry
Signal Rise & Fall Time
Rise & Fall Time Symmetry
Duty Cycle Distortion
Overshoot & Undershoot
Jitter
V_PPH
V_PPL
V_SS
T_RF
T_RFS
D_CD
V_OS
950
-
-950
-
98
-
3.0
-
-
-
35
50
-
-
MAX
1050
-1050
102
5.0
0.5
65
5
1.4
Units
mVpk
mVpk
%
nS
nS
%
%
nS
Note 7-4
Note 7-5
Note 7-6
Measured at the line side of the transformer, line replaced by 100 (± 1%) resistor.
Offset from 16 nS pulse width at 50% of pulse peak.
Measured differentially.
Notes
Note 7-4
Note 7-4
Note 7-4
Note 7-4
Note 7-4
Note 7-5
Note 7-6
TABLE 7-13: 10BASE-T TRANSCEIVER CHARACTERISTICS
Parameter
Symbol MIN TYP MAX
Transmitter Peak Differential Output Voltage
Receiver Differential Squelch Threshold
V_OUT
V_DS
2.2
2.5
2.8
300
420
585
Note 7-7 Min/max voltages ensured as measured with 100 resistive load.
Units
V
mV
Notes
Note 7-7
DS00002260A-page 62
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