DP83257VF - FDDI Physical Layer Controller | Texas Instruments
MPN: DP83257VF ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
DP83257VF Overview
An FDDI physical-layer controller is an interface IC that manages the physical signaling functions of an FDDI network connection. FDDI, or Fiber Distributed Data Interface, is a local-area networking technology whose physical layer handles signal transmission and reception over fiber or compatible physical media. The controller therefore sits between network-system logic and the physical medium, while higher-level software and protocol functions remain outside the device’s stated role.
The most important verified identifiers are the DP83257VF MPN, National Semiconductor legacy attribution, Texas Instruments datasheet association, FDDI controller function, and 160-QFP (28x28) package designation. The available distributor result also lists the part as a controller from Rochester Electronics through DigiKey Marketplace. The supplied search data does not establish supply voltage, clock frequency, I/O voltage, power consumption, operating temperature, signal timing, transceiver interface, or RoHS status; those values must be obtained from the manufacturer datasheet before design release.
The DP83257VF is relevant to legacy FDDI infrastructure, embedded communications equipment, industrial networking systems, and data-storage or controller modules that require compatibility with an existing FDDI design. Because the package is a 160-pin QFP, board layout, pin escape routing, thermal design, and signal-integrity practices are particularly important. Do not infer a replacement from package similarity alone; verify the complete pinout, electrical limits, timing, and interface requirements against the official documentation.
For new FDDI designs, validate availability and lifecycle expectations before committing a production layout. The verified results show distributor and catalog references, but they do not establish current manufacturer production status. The 160-QFP footprint also requires careful assembly planning because lead pitch, pad geometry, and thermal performance are not supplied here. Confirm those details from the official package drawing.
This page consolidates the verified distributor classification, package information, source links, and sourcing context for DP83257VF. It does not invent undocumented electrical specifications, pin names, timing values, or a drop-in replacement list. Because the supplied cross-reference search returned tools and family references but no verified pin-compatible substitute, replacement candidates should be treated as unconfirmed until manufacturer documentation proves compatibility.
Drop-in alternatives for DP83257VF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesDP83257VF Specifications
| Device Type | FDDI physical-layer controller |
| Product Description | PLAYERa+ device |
| Logic Classification | FDDI controller |
| Manufacturer Attribution | National Semiconductor / Texas Instruments |
| Package Type | 160-QFP |
| Package Dimensions | 28x28 mm |
| Pin Count | 160 pins |
| Interface Category | FDDI physical-layer interface |
DP83257VF 28x28 mm Pin Configuration Guide
Pin configuration for DP83257VF (28x28 mm package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for DP83257VF.
Refer to the datasheet for full pin configuration.
Typical Applications
DP83257VF is suitable for 6 applications: Legacy FDDI Network Interface, Industrial Communications Equipment, Embedded Data-Storage Systems, Legacy Network Interface Cards, Fiber Communications Test Systems, Legacy Control-System Retrofit.
Legacy FDDI Network Interface
The DP83257VF fits a legacy FDDI physical-layer interface position when the host system requires the PLAYERa+ controller function and is built around the DP83257VF pinout. Its verified classification is FDDI controller, while the supplied distributor data identifies a 160-QFP (28x28) package. In a new design, confirm the official electrical and timing limits before layout because supply voltage, I/O levels, and transceiver requirements are not included in the verified data.
Recommended
Industrial Communications Equipment
The DP83257VF may be considered for industrial communications equipment that already depends on an FDDI physical-layer controller and the associated legacy interface ecosystem. The confirmed evidence supports the FDDI-controller role and 160-QFP package, but it does not confirm industrial temperature grade, ESD rating, lifecycle status, or long-term supply. Engineers should qualify the complete controller, transceiver, isolation, and power design against the official datasheet before deployment.
Recommended
Embedded Data-Storage Systems
The DP83257VF can be relevant to legacy embedded data-storage systems where an FDDI link is used to connect storage, controller, or service modules. The verified search result describes the device as a PLAYERa+ FDDI physical-layer controller and confirms the 160-QFP package designation. Because no timing, supply, or environmental data is supplied, this application must be treated as a compatibility study rather than a specification-based selection.
Recommended
Legacy Network Interface Cards
For a legacy network interface card, DP83257VF could serve as the FDDI physical-layer controller when the board architecture already uses its device family and package. The 160-QFP (28x28) package is the only confirmed mechanical identifier in the supplied data; pin spacing, pad dimensions, and routing rules remain unverified. Preserve the original schematic, bill of materials, and datasheet revision whenever repairing or cloning this equipment.
Recommended
Fiber Communications Test Systems
The DP83257VF may be used in older fiber-communications test equipment that needs an FDDI physical-layer control function. The available evidence confirms only the device category and package, so the actual test use depends on the system’s medium, transceiver, timing, and power architecture. Validate signal integrity, reset behavior, and fault coverage with the manufacturer documentation and the original reference design.
Recommended
Legacy Control-System Retrofit
A retrofit using DP83257VF is most defensible when replacing the same functional device in an existing FDDI-based control system and the original footprint and interface behavior are known. The supplied data does not establish a drop-in replacement or current manufacturing status. Therefore, compare the candidate part against the installed device mechanically, electrically, and behaviorally, and obtain lifecycle confirmation before field deployment.
Recommended
Recommended Products Summary
Engineering reference data for DP83257VF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Brand | Texas Instruments / National Semiconductor legacy attribution |
| Package | 160-QFP (28x28) |
| Pin Count | 160 pins |
| Device Type | FDDI physical-layer controller |
| Product Description | PLAYERa+ device |
Key Differentiators
- Verified legacy FDDI identity (vs No verified alternative)
- Large legacy QFP package (vs No verified alternative)
- Source traceability for legacy sourcing (vs No verified alternative)
Design Notes
Treat the 160-QFP (28x28) package as a board-level constraint. Before routing, obtain the official package drawing and verify pin numbering, pad dimensions, lead pitch, solder-mask clearance, and paste recommendations. Do not derive a footprint from the catalog phrase 160-QFP (28x28) alone. For a legacy repair, compare the new land pattern mechanically with the installed board and the original assembly documentation.
Preserve the original FDDI channel topology and controlled-impedance routing wherever possible. Keep sensitive high-speed nets short, maintain continuous reference planes, and avoid unnecessary stubs or layer transitions. Because the supplied data does not provide edge rates, timing limits, I/O standards, or transceiver interfaces, use the manufacturer datasheet and the original reference layout to set actual spacing, termination, and via rules.
Do not apply power until the supply rails, sequencing, decoupling, and absolute maximum ratings are verified from the official datasheet. The provided data does not state operating voltage or power consumption. Inspect the original system schematic and BOM first, then reproduce the documented power architecture, including local bypass placement and any required reset or clock initialization sequence.
A same-family reference such as DP83256 or DP83257 is not automatically a drop-in substitute. The supplied search results even contain conflicting terminal-count descriptions for related entries, while DP83257VF itself is identified as 160-QFP (28x28). Require an authoritative pin-by-pin comparison, timing review, and lifecycle statement before substitution, especially when field reliability depends on an obsolete FDDI design.
Compliance Information
The supplied verified data does not extract RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-mineral statements. Compliance and application-grade claims must be confirmed from the manufacturer documentation.
