DP83223 Datasheet, PDF (13/14 Pages) National Semiconductor (TI) – TWISTER High Speed Networking Transceiver Device

4.3 LOOPBACK PROPAGATION DELAY
PMRD+
PMRD-
PMID+
T3.1
PMID-
Number
Parameter
T3.1 Loopback Propagation Delay
Min
Typ
Max
7
Units
ns
4.4 SIGNAL DETECT TIMING
RXI +/-
static
signal
static
T4.1
T4.2
Do Not Use
SD+
Number
Parameter
T4.1 Signal Detect Turn-On Time
Min
Typ
Max
40
100
Units
us
T4.2 Signal Detect Turn-Off Time
12
50
us
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
Number
T5.1
Parameter
Total Jitter (TX+RX)
Min
Typ
Max
2
3.5
Units
ns
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.