Do Not Use

4.3 LOOPBACK PROPAGATION DELAY

4.4 SIGNAL DETECT TIMING

Note: The Signal Detect Assert Time is a measure of the time required for Signal Detect to assert after the RXI+/- inputs are provided with a receive signal

with sufficient amplitude to meet the Signal Detect Assert Threshold parameter. Device configuration: LBEN=0, CDET=0, ENCSEL=0, EQSEL=float, PM-

RD+/-=static, RXI+/-=125Mb/s data with amplitude greater than 700mV pk-pk differential.

Note: The Signal Detect De-assert Time is a measure of the time required for Signal Detect to deassert after the RXI+/- inputs are provided with a receive

signal with sufficient amplitude to meet the Signal Detect Deassert Threshold parameter. Device configuration: LBEN=0, CDET=0, ENCSEL=0,

EQSEL=float, PMRD+/-=static, RXI+/-=125Mb/s data with amplitude less than 200mV pk-pk differential.

4.5 ADAPTIVE EQUALIZER TIMING

Note: Total Receive Jitter is a measure of the total accumulated jitter as measured differentially across the PMID+/- receive outputs of the device. This pa-

rameter is guaranteed by an ATE adaptive equalizer jitter measurement (done at worst case conditions) and a system level characterization over temperature

and Vcc. The ATE measurement has been empirically correlated with the system level jitter measurement, which includes all transmit jitter (as described in

T1.3) as well as all jitter induced by a worst case Cat-5 cable plant and the additional Jitter induced by the receive operation of the device. Device configu-

ration: LBEN=0, CDET=0, ENCSEL=0, EQSEL=float, PMRD+/-=125Mb/s data, RXI+/-=125Mb/s data.

Number

Parameter

Min

Typ

Max

Units

T3.1

Loopback Propagation Delay

7

ns

Number

Parameter

Min

Typ

Max

Units

T4.1

Signal Detect Turn-On Time

40

100

us

T4.2

Signal Detect Turn-Off Time

12

50

us

Number

Parameter

Min

Typ

Max

Units

T5.1

Total Jitter (TX+RX)

2

3.5

ns

PMRD+

PMRD-

PMID+

PMID-

T3.1

SD+

RXI +/-

signal

static

static

T4.1

T4.2