- Standard Microsystems Single-Chip Ethernet Controller Specification Sheet

Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface

Datasheet

Revision 1.22 (09-25-08) 160 SMSC LAN9420/LAN9420i

DATASHEET

Note 5.10 Measured at line side of transformer, line replaced by 100Ω (+/- 1%) resistor.

Note 5.11 Offset from 16nS pulse width at 50% of pulse peak.

Note 5.12 Measured differentially.

Note 5.13 Min/max voltages guaranteed as measured with 100Ω resistive load.

Table 5.7 100BASE-TX Transceiver Characteristics

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Peak Differential Output Voltage High V

PPH

950 - 1050 mVpk Note 5.10

Peak Differential Output Voltage Low V

PPL

-950 - -1050 mVpk Note 5.10

Signal Amplitude Symmetry V

98 - 102 % Note 5.10

Signal Rise and Fall Time T

3.0 - 5.0 nS Note 5.10

Rise and Fall Symmetry T

RFS

--0.5nSNote 5.10

Duty Cycle Distortion D

35 50 65 % Note 5.11

Overshoot and Undershoot V

--5%

Jitter 1.4 nS Note 5.12

Table 5.8 10BASE-T Transceiver Characteristics

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Transmitter Peak Differential Output Voltage V

OUT

2.2 2.5 2.8 V Note 5.13

Receiver Differential Squelch Threshold V

300 420 585 mV