Datasheet

7.0 DC and AC Specifications (Continued)

103 www.national.com

DP83815

7.2.9 100BASE-TX Transmit

Note: Normal Mismatch is the difference between the maximum and minimum of all rise and fall times.

Note: Rise and fall times taken at 10% and 90% of the +1 or -1 amplitude.

Note: Carrier Sense On Delay is determined by measuring the time from the first bit of the “J” code group to the assertion of Carrier Sense.

Note: 1 bit time = 10 ns in 100 Mb/s mode.

Note: The Ideal window recognition region is ± 4 ns.

Parameter Description Notes Min Typ Max Units

7.2.9.1

100 Mb/s TPTD+/− Rise and

Fall Times

see Test Conditions section 3 4 6 ns

100 Mb/s Rise/Fall Mismatch 500 ps

7.2.9.2

100 Mb/s TPTD+/−

Transmit Jitter

1.4 ns

TPTD+/−

eye pattern

+1 RISE

+1 FALL

-1 FALL

-1 RISE

T1 T1

Obsolete