DP83257VF National Semiconductor, DP83257VF Datasheet - Page 29
![no-image](/images/manufacturer_photos/0/4/469/national_semiconductor_sml.jpg)
DP83257VF
Manufacturer Part Number
DP83257VF
Description
IC FDDI LAYER CTRLR 160PQFP
Manufacturer
National Semiconductor
Datasheet
1.DP83256VF.pdf
(144 pages)
Specifications of DP83257VF
Controller Type
physical layer controller
Voltage - Supply
4.75 V ~ 5.25 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
160-BFQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Supply
-
Interface
-
Other names
*DP83257VF
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DP83257VF
Manufacturer:
NVIDIA
Quantity:
12 388
- Current page: 29 of 144
- Download datasheet (997Kb)
3 0 Functional Description
3 8 PMD INTERFACE
The PMD Interface connects the PLAYER
standard FDDI Physical Media Connection such as a fiber
optic transceiver or a copper twisted pair transceiver It is a
125 MHz full duplex serial connection
The DP83256 PLAYER
face This PMD Interface should be used for all PMD imple-
mentations that do not require an external scrambler
descrambler function clock recovery function or clock
generation function such as a Fiber Optic or Shielded
Twisted Pair (SDDI) PMDs
The DP83256-AP and DP83257 PLAYER
two PMD interfaces The PMD Interface should be used for
all PMD implementations that do not require an external
scrambler descrambler function clock recovery function
a
device contains one PMD inter-
FIGURE 3-20 Fiber Optic or STP PMD Connection
a
devices contain
FIGURE 3-21 UTP PMD Connections
a
(Continued)
device to a
29
Figure 3-20 shows how the DP83256 DP83256-AP or
Figure 3-21 shows how the DP83256-AP or DP83257
or clock generation function such as a Fiber Optic or
Shielded Twisted Pair (SDDI) PMDs The second Alternate
PMD Interface can be used to support Unshielded Twisted
Pair (UTP) PMDs that require external scrambling and al-
lows implementation with no external clock recovery or
clock generation functions required See Figure 3-21
PLAYER
The following figures illustrate how the PLAYER
can be connected to various types of PMDs
DP83257 PLAYER
or Shielded Twisted Pair (SDDI) PMD using the Primary
PMD Interface
PLAYER
Pair (UTP) PMD using the Alternate PMD Interface
a
a
device is connected to an Unshielded Twisted
TO PMD CONNECTIONS
a
device is connected to a Fiber Optic
TL F 11708 – 47
TL F 11708 – 48
a
device
Related parts for DP83257VF
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![MC1408P8](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
National Semiconductor [8-Bit D/A Converter]
Manufacturer:
National Semiconductor
Datasheet:
![CS1301](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
National Semiconductor [Media Coprocessor]
Manufacturer:
National Semiconductor
Datasheet:
![LM4832N](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
![LM4832M](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
![LM4546](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
AC97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound
Manufacturer:
National Semiconductor
![LP2981AIM5X-2.7](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
National Semiconductor
Datasheet:
![LP3988IMFX-2.6](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
National Semiconductor
Datasheet:
![LPV321M7X](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
General Purpose, Low Voltage, Low Power, Rail-to-Rail Output Operational Amplifiers
Manufacturer:
National Semiconductor
Datasheet:
![ADC0882CCN](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
8-bit 20 MSPS flash A/D converter.
Manufacturer:
National Semiconductor
Datasheet:
![LM837N](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Low Noise Quad Operational Amplifier
Manufacturer:
National Semiconductor
Datasheet:
![DS3650J](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Quad Differential Line Receivers
Manufacturer:
National Semiconductor
Datasheet:
![DS3662J](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Quad High Speed Trapezoidal? Bus Transceiver
Manufacturer:
National Semiconductor
Datasheet:
![DS7820A](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
Dual Line Receiver
Manufacturer:
National Semiconductor
Datasheet:
![DP8481J](/images/manufacturer_photos/0/4/469/national_semiconductor_tmb.jpg)
Part Number:
Description:
TTL to 10k ECL Level Translator with Latch
Manufacturer:
National Semiconductor
Datasheet: