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Texas Instruments DP83901AV
- Part No.:
- DP83901AV
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
DP83901AV.pdf
- Description:
- IC CONTROLLR SER NETWK IN 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,612
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Product details
Overview
DP83901AV from National Semiconductor is a CMOS Serial Network Interface Controller (SNIC) implementing IEEE 802.3-compliant MAC and ENDEC functions for 10BASE5, 10BASE2, and 10BASE-T Ethernet. It integrates dual 16-byte DMA channels, 16-byte FIFO, Manchester encoder/decoder with 10 Mbit/sec operation, and collision detection logic - enabling full CSMA/CD protocol execution in embedded LAN nodes.
For engineers reviewing the DP83901AV datasheet, DP83901AV pinout, DP83901AV application, or DP83901AV equivalent, this device serves as a complete single-chip MAC+ENDEC solution requiring no external precision timing components, supporting remote DMA transfers, loopback diagnostics, and physical/multicast/broadcast address filtering in legacy industrial Ethernet designs.
Technical Context
The DP83901AV implements a fully integrated Media Access Control (MAC) layer with dedicated Protocol PLA for IEEE 802.3 CSMA/CD compliance, including random backoff, jam pattern generation on collision, and CRC-32 (AUTODIN II polynomial) generation/checking. Its ENDEC module performs Manchester encoding/decoding at 10 Mbit/sec with ≤18 ns jitter tolerance and includes squelch circuitry rejecting signals below ±175 mV.
It supports asynchronous system-to-local memory transfers via PRD/PWR strobes, dual-mode DMA (local + remote), and flexible bus interface with 16-bit multiplexed AD0–AD15, register addressing via RA0–RA3, and programmable FIFO thresholds (2/4/8/12-byte). The chip uses independent system (BSCK) and network clocks and provides three levels of loopback for diagnostics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 10 Mbit/sec - fixed-rate Manchester serial I/O compatible with IEEE 802.3 physical layers. |
| Encoding | Manchester - on-chip ENDEC eliminates need for external encoder/decoder ICs or discrete logic. |
| FIFO Depth | 16 bytes - buffers network/system data rate mismatch; threshold programmable to 2/4/8/12 bytes. |
| DMA Channels | Dual 16-bit - local DMA moves packets between FIFO and buffer ring; remote DMA transfers between host and buffer memory. |
| CRC Standard | AUTODIN II (X³²+X²⁶+X²³+X²²+X¹⁶+X¹²+X¹¹+X¹⁰+X⁸+X⁷+X⁵+X⁴+X²+X¹+1) - hardware-accelerated frame integrity checking. |
| Jitter Tolerance | ±18 ns - ensures reliable decoding of Manchester data under real-world cable-induced timing distortion. |
| Supply Voltage | 5 V ±5% - single digital supply for core logic; separate VCC pins for AUI TX/RX and VCO sections to reduce noise coupling. |
Pinout & Package
DP83901AV is packaged in a 68-pin plastic leaded chip carrier (PLCC), per National Semiconductor package code V68A. Pin functions are validated per SNLS073A datasheet revision A (November 1995).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AD0–AD15 | Multiplexed Address/Data Bus | Carries register data (AD0–AD7) or address (AD8–AD15) during byte/word DMA cycles; tri-stated when inactive. |
| RA0–RA3 | Register Address Inputs | Select one of 16 internal registers (e.g., Command, ISR, CR, DCR) during CPU slave access. |
| MRD / MWR | Master Read/Write Strobes | Control direction and timing of DMA transfers to/from FIFO; active-low, tri-stated until BACK asserted. |
| TXa / TXb | Differential Transmit Outputs | Source-follower drivers for AUI/10BASE5/10BASE2; require external 270 Ω pull-down resistors. |
| RXa / RXb | Differential Receive Inputs | Accept Manchester-encoded signal from transceiver; terminated externally with two 39 Ω series resistors in thin Ethernet. |
| CDa / CDb | Differential Collision Inputs | Receive 10 MHz collision signal from DP8392 CTI; squelched below ±175 mV to reject noise. |
| SEL | Transmit Idle Mode Select | Low = Ethernet idle polarity (TXa > TXb); high = IEEE 802.3 zero-differential idle for transformer-coupled loads. |
| BSCK | Bus Clock Input | Defines DMA cycle timing (t1–t4); four BSCK cycles per transfer; READY extends t3 for wait-state insertion. |
Key Features
| Feature | Design Value |
|---|---|
| IEEE 802.3 Compliance | Full MAC+ENDEC implementation - handles preamble/SFD/FCS generation, CRC-32, backoff, jam, and frame alignment without host intervention. |
| Integrated ENDEC | Eliminates external Manchester codec ICs and crystal oscillator - uses X1/GND-X2 for optional crystal or external clock input. |
| Address Filtering | Hardware-accelerated recognition of physical (6-byte match), multicast (6-bit hash into 64-bit filter), and broadcast (all-1s) addresses. |
| Loopback Diagnostics | Three modes: internal register, internal ENDEC, and external transceiver - enables isolation of MAC vs. PHY faults without network connection. |
| Buffer Management | Automatic 256-byte receive buffer ring linking across up to six contiguous pages - handles fragmented packets and back-to-back traffic in loaded networks. |
Applications
| Industrial Control Network Node | Legacy Test Equipment Interface |
|---|---|
Use Scenario: Connecting PLCs and HMIs over coaxial or twisted-pair Ethernet in factory automation systems where long-term component availability and deterministic latency are critical. IC Role / Device Role / Timing Role: DP83901AV acts as the sole MAC+ENDEC layer, handling packet assembly, CRC, collision detection, and Manchester conversion - offloading all link-layer processing from the host microcontroller. Use Value: Enables direct integration into 5 V systems without external timing components; supports diagnostic loopback for field validation of physical layer integrity. | Use Scenario: Retrofitting aging oscilloscopes, logic analyzers, and protocol testers with 10BASE-T connectivity for remote configuration and waveform upload. IC Role / Device Role / Timing Role: DP83901AV serves as the embedded Ethernet controller interfacing to an on-board microprocessor via ISA-like parallel bus, managing DMA transfers and interrupt-driven packet handling. Use Value: Provides IEEE 802.3-compliant communication using only two chips (DP83901AV + DP8392 CTI) - reducing BOM count and PCB area versus multi-IC solutions. |
| Embedded SCADA Gateway | Avionics Data Recorder Interface |
Use Scenario: Aggregating Modbus RTU or CANopen data from field devices and forwarding it over legacy Ethernet to central monitoring stations in oil & gas or power substations. IC Role / Device Role / Timing Role: DP83901AV operates as a store-and-forward bridge controller, using its dual DMA channels to decouple slow serial protocols from 10 Mbps Ethernet timing. Use Value: Leverages built-in address filtering and promiscuous mode to support multiple network segments; FIFO and buffer ring prevent packet loss during bursty telemetry uploads. | Use Scenario: Integrating flight data recorders with maintenance ground stations via ruggedized 10BASE2 (thin coax) networks in aircraft avionics bays. IC Role / Device Role / Timing Role: DP83901AV functions as the certified Ethernet endpoint, executing deterministic CSMA/CD arbitration and CRC verification required for DO-178B Level C software assurance. Use Value: Supports SEL-configurable transmit polarity and differential collision detection - meeting MIL-STD-1553B cabling practices and EMI resilience requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial network interface controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DP83900A | Predecessor SNIC without enhanced FIFO management or improved jitter tolerance; lacks SEL pin for transmit polarity control. | Supports only 10BASE5/10BASE2; not qualified for 10BASE-T due to stricter receive sensitivity requirements. | Use only if replacing legacy DP83900A designs with identical board layout and transceiver interface. |
| RTL8019AS | NE2000-compatible 10 Mbps ISA Ethernet controller with integrated 16 KB SRAM; requires external transceiver but offers larger buffer and simpler software driver model. | Designed for PC-compatible ISA bus; lacks native support for remote DMA and dual-bus architectures used in embedded systems. | Prefer for x86-based test equipment or industrial PCs where NE2000 driver stack is already deployed. |
Compared with DP83901AV, DP83900A lacks 10BASE-T readiness and SEL-controlled idle polarity, limiting interoperability with modern transceivers; RTL8019AS trades off embedded ENDEC functionality for larger on-chip memory and standardized driver compatibility - making it suitable for host-CPU-centric designs but unsuitable for minimal-footprint, transceiver-integrated implementations.
Availability
DP83901AV is available at Aetrix Electronics and suitable for industrial control network nodes, legacy test equipment interfaces, embedded SCADA gateways, and avionics data recorder interfaces requiring stable component supply and long lifecycle support.
Supply support for DP83901AV 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 and interface ICs, acquired by Texas Instruments in 2011. Known for high-reliability, industry-standard interface solutions.
The DP83901AV belongs to National's SNIC (Serial Network Interface Controller) product line, designed specifically to provide IEEE 802.3-compliant MAC+ENDEC functionality in space-constrained, cost-sensitive embedded Ethernet endpoints circa 1995.
FAQ
What is the primary function of the DP83901AV in an Ethernet system?
The DP83901AV serves as a complete Serial Network Interface Controller implementing both Media Access Control (MAC) and Encode-Decode (ENDEC) functions per IEEE 802.3. It handles packet transmission/reception, Manchester encoding/decoding at 10 Mbit/sec, CRC-32 generation/checking, collision detection, and CSMA/CD protocol execution - eliminating the need for separate MAC and PHY ICs in legacy 10 Mbps Ethernet designs.
Does the DP83901AV require an external crystal or oscillator?
The DP83901AV accepts either an external clock source on X1 or a crystal oscillator between X1 and GND/X2. While it does not require external precision components for basic operation, using a crystal improves jitter performance for reliable Manchester decoding. The ENDEC PLL locks to the incoming network signal, but system timing (BSCK) must be provided externally - typically derived from a crystal-controlled oscillator on the host board.
How does the DP83901AV handle packet buffering and memory management?
The DP83901AV uses a 16-byte internal FIFO to buffer data between network and system memory, with programmable thresholds (2/4/8/12 bytes) to trigger DMA requests. For reception, it manages a 256-byte-per-page circular buffer ring in external memory, automatically linking pages for oversized packets and tracking read/write pointers via Current Page and Boundary Pointer registers - enabling robust handling of back-to-back frames without host CPU intervention.
Can the DP83901AV operate with modern 10BASE-T transceivers?
Yes - the DP83901AV is explicitly specified for 10BASE-T operation per its datasheet (SNLS073A), supporting differential transmit/receive pairs (TXa/TXb, RXa/RXb) and collision detection (CDa/CDb) compatible with standard 10BASE-T transceivers. Its SEL pin configures idle-state polarity to match transformer-coupled loads, and its squelch circuitry rejects noise below ±175 mV - meeting the electrical requirements of IEEE 802.3u Clause 14.
What diagnostic capabilities does the DP83901AV provide?
The DP83901AV supports three distinct loopback modes: internal register loopback (testing CPU interface), internal ENDEC loopback (verifying encoder/decoder functionality without external signals), and external transceiver loopback (validating full PHY path including cabling and connectors). These are controlled via register bits and require no external hardware changes - enabling comprehensive fault isolation in deployed systems.
DP83901AV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 68-LCC (J-Lead)
- Programmable:
- Not Verified
- Protocol:
- -
- Function:
- Controller
- Interface:
- -
- Standards:
- -
- Voltage - Supply:
- 5V
- Current - Supply:
- 110mA
- Operating Temperature:
- -
- Supplier Device Package:
- 68-PLCC (25.13x25.13)
- Grade:
- -
- Qualification:
- -
DP83901AV FAQ
1.How can I place an order for DP83901AV through Aetrix?
Please submit a Request for Quotation (RFQ) for DP83901AV 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 DP83901AV reliable?
The price and inventory of DP83901AV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DP83901AV is usually 5 days.
3.What payment methods are accepted for DP83901AV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DP83901AV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DP83901AV?
DP83901AV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DP83901AV 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 DP83901AV?
For technical support, including DP83901AV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DP83901AV requirements.
6.How does Aetrix verify that DP83901AV is sourced from the original manufacturer or authorized distributors?
All DP83901AV 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 DP83901AV meets industry standards.
7.What is the process for return or replacement of DP83901AV?
All DP83901AV units undergo pre-shipment inspection (PSI). If there is an issue with DP83901AV, 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 DP83901AV part is unused and in its original packaging.
Return procedure for DP83901AV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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