dp83223 National Semiconductor Corporation, dp83223 Datasheet - Page 13

• Manufacturer Part Number: dp83223
• Description: Dp83223 Twister High Speed Networking Transceiver Device
• Manufacturer: National Semiconductor Corporation

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