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Texas Instruments DP83934CVUL-25
- Part No.:
- DP83934CVUL-25
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 160-BQFP
- Datasheet:
-
DP83934CVUL-25.pdf
- Description:
- IC CTRLR ORIENT NETWORK 160QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,243
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Product details
Overview
DP83934CVUL-25 from National Semiconductor is a second-generation 10BASE-T Ethernet controller IC integrating IEEE 802.3 ENDEC, twisted-pair interface (TPI), and high-speed DMA-capable 32-bit non-multiplexed bus interface. It operates at 25 MHz, supports both big/little endian modes, and delivers <5% bus bandwidth consumption during DMA transfers in embedded network adapter and motherboard applications.
For engineers reviewing the DP83934CVUL-25 datasheet, DP83934CVUL-25 pinout, DP83934CVUL-25 application, or DP83934CVUL-25 equivalent, key selection criteria include integrated TPI/ENDEC compatibility with 10BASE-T physical layer, linked-list buffer management for zero-copy packet handling, 32-byte transmit/receive FIFOs, and support for 160-pin PQFP packaging in legacy industrial and PC-oriented networking designs.
Technical Context
The DP83934CVUL-25 implements a pipelined MAC architecture with separate 32-byte transmit and receive FIFOs, enabling concurrent packet processing without intermediate memory copies. Its linked-list buffer management uses three memory regions (RRA, RBA, RDA) for dynamic resource allocation and status tracking.
It integrates a full IEEE 802.3-compliant ENDEC and Twisted Pair Interface module supporting Manchester encoding/decoding, collision detection, link integrity monitoring (via LINKLED/POLED), and automatic AUI/TPI mode selection. Bus interface supports National/Intel (little-endian) and Motorola (big-endian) modes via BMODE pin configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface Standard | IEEE 802.3-compliant 10BASE-T Ethernet controller with integrated ENDEC and TPI |
| Bus Width | 32-bit non-multiplexed address/data bus supporting 16-bit or 32-bit DMA transfers |
| Operating Frequency | 25 MHz system clock; internal 10 MHz transmit/receive clock derived from 20/25 MHz oscillator input |
| FIFO Depth | 32-byte dedicated transmit FIFO and 32-byte dedicated receive FIFO for burst packet buffering |
| Buffer Management | Linked-list scheme using RRA/RBA/RDA memory areas - enables zero-copy packet handling in system RAM |
| Power Supply | +5 V digital (VCC1–9), +5 V ENDEC (VCCL/TXVCC/RXVCC), +5 V TPI (TPVCC/PLLVCC/OSCVCC/RXTVCC) |
| Package | 160-pin Plastic Quad Flat Package (PQFP), 28 × 28 mm body, 0.65 mm pitch |
Pinout & Package
DP83934CVUL-25 is housed in a 160-pin PQFP package with 0.65 mm lead pitch and 28 mm × 28 mm body size. Pin functions are mode-dependent (National/Intel vs. Motorola bus modes) and include dual-role signals such as AS/ADS, MRW/MWR, and DSACK0/RDYo.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TXOda, TXOa, TXOb, TXOdb | TPI Transmit Outputs | Differential CMOS-level outputs resistively combined externally to generate equalized 10BASE-T differential signal |
| RXIa, RXIb | TPI Receive Inputs | Differential inputs feeding internal amplifier and ENDEC - detect valid Manchester data on twisted pair |
| TXLED, RXLED, COLED, POLED, LINKLED | Link Status Indicators | Active-low open-collector outputs for real-time visual diagnostics of transmit, receive, collision, polarity reversal, and link integrity |
| BMODE | Bus Mode Select | Configures byte ordering (high = Motorola/big-endian; low = National/Intel/little-endian) and control signal polarity |
| EXT, AUI/TP | Interface Mode Control | EXT selects internal/external ENDEC; AUI/TP selects twisted-pair or AUI transceiver interface path |
| OSCIN, OSCOUT | Oscillator Interface | Supports 20 MHz or 25 MHz crystal or external oscillator for ENDEC clock generation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 10BASE-T PHY | On-chip ENDEC + TPI eliminates need for external transceiver in 10BASE-T designs - reduces BOM count and layout complexity |
| High-efficiency DMA engine | Consumes <5% of system bus bandwidth during sustained packet transfer - preserves CPU and memory resources |
| Flexible buffer management | Three-region linked-list model (RRA/RBA/RDA) allows dynamic allocation of receive buffers without fixed-size ring buffers |
| Dual-mode bus interface | Hardware-selectable National/Intel (little-endian) or Motorola (big-endian) timing and signaling - simplifies integration with diverse MPUs |
| Comprehensive diagnostics | Loopback mode (LBK), carrier sense (CRSo), collision detect (COLo), and jabber protection enable robust field validation and failure isolation |
Applications
| Industrial Network Adapters | Legacy PC Ethernet Cards |
|---|---|
Use Scenario: Retrofitting ISA or VLB-based industrial controllers with 10BASE-T connectivity for factory-floor SCADA and PLC communication. IC Role / Device Role / Timing Role: Primary Ethernet MAC+PHY controller managing packet framing, Manchester encoding/decoding, and DMA-driven memory transfers. Use Value: Eliminates discrete transceiver and logic components - reduces board area and improves EMI resilience in electrically noisy environments. | Use Scenario: OEM production of mid-1990s desktop PC add-in cards requiring plug-and-play 10 Mbps Ethernet under DOS/Windows 3.1/95. IC Role / Device Role / Timing Role: Full-featured network interface controller providing register-level compatibility with NE2000-class drivers and hardware abstraction. Use Value: Native support for big/little-endian buses and auto AUI/TPI selection enables single-board design across multiple host platforms. |
| Embedded Motherboard LAN | Network Bridge Modules |
Use Scenario: Integrating wired Ethernet into proprietary embedded motherboards for medical imaging devices or test equipment. IC Role / Device Role / Timing Role: System-on-board Ethernet controller interfacing directly to local RAM and host processor via 32-bit non-multiplexed bus. Use Value: Linked-list buffer management and zero-copy packet handling minimize CPU interrupt load and memory bandwidth contention. | Use Scenario: Building IEEE 802.3-compliant repeater/bridge modules using DP83950 RIC companion chip for network management. IC Role / Device Role / Timing Role: Managed Ethernet endpoint providing CAM-based address filtering and PCOMP signal for packet compression in RIC-managed traffic. Use Value: Hardware-accelerated address matching (up to 16 physical/multicast addresses) and programmable PCOMP output reduce software overhead in multi-port bridge firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Ethernet controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DP83932CVUL | 20 MHz version; identical pinout, register set, and feature set except lower max clock frequency | Requires 20 MHz oscillator; suitable only where system timing budget does not support 25 MHz operation | Select DP83932CVUL only if clock source or timing margin constraints prohibit 25 MHz operation. |
| RTL8019AS | NE2000-compatible 10 Mbps controller; no integrated ENDEC/TPI - requires external PHY or transformer interface | Needs external magnetics and level-shifting; broader driver support but higher BOM cost and layout effort | Choose RTL8019AS when leveraging existing NE2000 driver stacks and accepting added component count for flexibility. |
Compared with DP83934CVUL-25, DP83932CVUL offers identical functionality at reduced speed, while RTL8019AS trades integrated PHY for wider software compatibility and external interface adaptability - neither is pin-compatible, but both serve overlapping legacy 10BASE-T controller use cases.
Availability
DP83934CVUL-25 is available at Aetrix Electronics and suitable for industrial network adapters, legacy PC Ethernet cards, and embedded motherboard LAN implementations requiring stable component supply and long-term obsolescence management.
Supply support for DP83934CVUL-25 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
National Semiconductor was a U.S.-based semiconductor company specializing in analog, interface, and communications ICs before its acquisition by Texas Instruments in 2011.
The DP83934CVUL-25 belongs to the SONIC-T family of systems-oriented network interface controllers designed specifically for high-integration 10BASE-T Ethernet solutions in 16-/32-bit embedded and PC platforms.
FAQ
What is the maximum operating frequency of the DP83934CVUL-25?
The DP83934CVUL-25 is rated for 25 MHz operation, with oscillator input accepted on OSCIN/OSCOUT pins. Internal ENDEC and TPI modules derive 10 MHz timing from this source, and the DMA engine sustains full throughput at this clock rate. Exceeding 25 MHz violates AC timing specifications and may cause frame corruption or bus arbitration failures in the DP83934CVUL-25.
Does the DP83934CVUL-25 require an external transceiver for 10BASE-T operation?
No, the DP83934CVUL-25 integrates a fully compliant IEEE 802.3 ENDEC and Twisted Pair Interface (TPI) module, enabling direct connection to 10BASE-T magnetics without external transceiver components. External termination resistors and transformers remain necessary, but the DP83934CVUL-25 handles all encoding, decoding, collision detection, and link integrity monitoring internally.
How does the DP83934CVUL-25 handle byte ordering for different microprocessors?
The DP83934CVUL-25 uses the BMODE pin to select between National/Intel (little-endian) and Motorola (big-endian) bus modes. This setting controls address strobe timing (ADS vs. AS), read/write strobe polarity (MWR vs. MRW), and data alignment behavior - allowing seamless integration with x86, 68k, and other 16-/32-bit processors without software byte-swapping overhead in the DP83934CVUL-25.
What diagnostic features are built into the DP83934CVUL-25?
The DP83934CVUL-25 provides hardware-level diagnostics including loopback mode (LBK), active-low LED outputs (TXLED, RXLED, COLED, POLED, LINKLED), carrier sense (CRSo), collision detect (COLo), and jabber protection. These features enable real-time physical-layer validation and fault isolation without host CPU intervention - critical for field-deployed DP83934CVUL-25-based network interfaces.
Is the DP83934CVUL-25 still in production or considered obsolete?
The DP83934CVUL-25 is marked obsolete in its official documentation (SNLS088A, July 1995), consistent with National Semiconductor's product lifecycle policy for legacy 10 Mbps controllers. Aetrix Electronics maintains limited legacy inventory and provides traceable, tested units for repair and continuity programs - but new design-ins should consider modern alternatives unless maintaining strict form-fit-function replacement for installed base systems using DP83934CVUL-25.
DP83934CVUL-25 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 160-BQFP
- Programmable:
- Not Verified
- Protocol:
- Ethernet
- Function:
- Controller
- Interface:
- Parallel
- Standards:
- 10 Base-T PHY
- Voltage - Supply:
- 4.75V ~ 5.25V
- Current - Supply:
- 140mA
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 160-PQFP (28x28)
- Grade:
- -
- Qualification:
- -
DP83934CVUL-25 FAQ
1.How can I place an order for DP83934CVUL-25 through Aetrix?
Please submit a Request for Quotation (RFQ) for DP83934CVUL-25 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DP83934CVUL-25 reliable?
The price and inventory of DP83934CVUL-25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DP83934CVUL-25 is usually 5 days.
3.What payment methods are accepted for DP83934CVUL-25?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DP83934CVUL-25 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DP83934CVUL-25?
DP83934CVUL-25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DP83934CVUL-25 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DP83934CVUL-25?
For technical support, including DP83934CVUL-25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DP83934CVUL-25 requirements.
6.How does Aetrix verify that DP83934CVUL-25 is sourced from the original manufacturer or authorized distributors?
All DP83934CVUL-25 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DP83934CVUL-25 meets industry standards.
7.What is the process for return or replacement of DP83934CVUL-25?
All DP83934CVUL-25 units undergo pre-shipment inspection (PSI). If there is an issue with DP83934CVUL-25, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DP83934CVUL-25 part is unused and in its original packaging.
Return procedure for DP83934CVUL-25:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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