dp83223 National Semiconductor Corporation, dp83223 Datasheet - Page 12

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

4.0 DC and AC Specifications
4.1 TRANSMIT TIMING
Note: TXO Output Rise and Fall time is a measure of the transition time for all MLT-3 transitions from 10% to 90%. This measurement is conducted directly
at the TXO+/- outputs and does not include the additional bandwidth limiting effects of an isolation transformer. Each of the four possible MLT-3 transitions
is measured (see figure 2 for MLT-3 waveform example). The TXO+/- outputs are configured to switch at a nominal 2V pk-pk differential amplitude into a
standard 50 differential load. Device configuration: LBEN=0, CDET=0, ENCSEL=0, EQSEL=float, PMRD+/-=125Mb/s data, RXI+/-=static.
Note: : t
CDET=0, ENCSEL=0, EQSEL=float, PMRD+/-=125Mb/s data, RXI+/-=static.
Note: : The Transmit channel propagation delay is a measure of the time delay imposed on the transmit data as it passes from the PMRD+/- inputs to the
TXO+/- outputs. Device configuration: LBEN=0, CDET=0, ENCSEL=0, EQSEL=float, PMRD+/-=125Mb/s data, RXI+/-=static.
Note: Transmit Jitter is a measure of the total jitter as measured differentially across the TXO+/- outputs of the device. This includes the cumulative effect
of Duty Cycle Distortion (DCD), Data Dependent Jitter (DDJ), and Random Jitter (RJ). Device configuration: LBEN=0, CDET=0, ENCSEL=0, EQSEL=float,
PMRD+/-=125Mb/s data (pseudo random ^15), RXI+/-=125Mb/s data in order to induce a worst case system level noise environment.
Note: T1.1, T1.2 and T1.4 are guaranteed by characterization over process, temperature, and Vcc.
4.2 RECEIVE PROPAGATION DELAY
Note: The Receive channel propagation delay is a measure of the time delay imposed on the receive data as it passes from the RXI+/- inputs to the PMID+/-
outputs. This measurement is taken after the device has had sufficient time for the receive adaptive equalizer to converge. Device configuration: LBEN=0,
CDET=0, ENCSEL=0, EQSEL=float, PMRD+/-=static, RXI+/-=125Mb/s data.
Number
TXr/fsym
Number
PMRD+
T1.1
T1.2
T1.3
T1.4
T2.1
PMRD-
-1
1
0
PMID+
PMID-
TXO Rise and Fall Symmetry is the difference between the maximum and minimum of all rise and fall times. Device configuration: LBEN=0,
RXI+
RXI-
Receive Propagation Delay
TXO Output Rise and Fall
TXO Rise / Fall Symmetry
TX prop delay
Transmit Jitter
T2.1
Parameter
Parameter
T1.3
(Continued)
TXO+
TXO-
12
2.25
Min
Min
T1.1
10% - 90%
2.75
Typ
Typ
7
7
T1.1
Max
3.25
Max
500
1.4
TXO+
TXO-
Units
Units
ns
ps
ns
ns
ns