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DP83256 Datasheet(PDF) 125 Page - Texas Instruments

Part # DP83256
Description  PLAYER(TM) Device (FDDI Physical Layer Controller)
PDF  146 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

DP83256 Datasheet(HTML) 125 Page - Texas Instruments

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70 Electrical Characteristics (Continued)
AC Characteristics for the PMD Interface Outputs (ANSI Specifications)
The following output signals are covered PMD Request Data (PMRD) Transmit Clock (TXC) Recovered Data Out
(RXD
OUT) Recovered Clock Out (RXC
OUT)
Note
The Alternate PMD Interface is only available on the 160 pin DP83257 PLAYERa Device and the 100 pin DP83256-AP Device The Transmit Clock is
enabled by the CGMREGTXCE bit The rest of the Alternate PMD Interface is enabled by the APMDREGAPMDEN bit
Comments in square brackets are section references to the ANSI documents where these specifications can be found
Symbol
Parameter
Conditions
Min
Typ
Max
Units
T57
PMRD Total Transmit Jitter
(Note 1)
072
ns p-p
Duty Cycle Distortion (DCD)a
PMD 81
Data Dependent Jitter (DDJ)a
Random Jitter (RJ)
T58
Total Recovered Clock (RXC
OUT) Jitter
(Note 1)
25
ns p-p
Static Alignment Error Accuracy (SAE)a
PMD E2
Clock Data Dependent Jitter (C
DDJ)a
Random Jitter (C
RJ)
Note 1
This parameter is not tested but is assured through characterization data and periodic testing of sample units
124



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