DP83840AVCE - 10/100 Ethernet PHY | Texas Instruments
Артикул: DP83840AVCE ✗ Снят с производстваDP83840AVCE Обзор
An Ethernet physical layer, or Ethernet PHY, is the interface between a digital network controller and physical copper or fiber media. The DP83840AVCE implements the analog and digital signaling needed to communicate over twisted-pair cabling, while an upper-layer MAC handles packet framing, addressing, and higher-level protocols. Its 10/100 capability allows equipment to support both legacy 10 Mb/s networks and Fast Ethernet links through one physical interface.
Key verified characteristics include support for 10/100BASE-T/TX, a 4.75 V to 5.25 V operating supply range, and approximately 335 mA supply current. The 100-pin PQFP package provides the connections required for integrated PHY functions, clocking, power, status, and media-interface signaling. Distributor listings identify the component as a 100-PQFP Ethernet physical-layer controller, and the package is supplied in tray packaging.
The device is designed for industrial and embedded systems that require an IEEE 802.3af-compatible Ethernet interface. Relevant implementation considerations include proper magnetics coupling to an RJ45 connector, controlled clock and power distribution, compliant board layout, and isolation from high-energy network transients. Because the DP83840AVCE is listed as obsolete by one distributor, engineers should also confirm the availability of authorized inventory before beginning a new production design.
Typical uses include industrial Ethernet equipment, embedded controllers, network interface appliances, test equipment, and communications infrastructure. The 10BASE-T capability can provide compatibility with installed 10 Mb/s infrastructure, while 100BASE-TX supports higher-throughput Fast Ethernet applications. System designers must still evaluate total board area, thermal behavior, component availability, and medium requirements around the obsolete-product status.
The main engineering trade-off is legacy-versus-modern network architecture. A 10/100 PHY can connect equipment to older copper networks, but it does not provide the throughput or feature set expected from current multi-gigabit Ethernet designs. For a new platform, engineers should determine whether backward compatibility justifies the 100-pin PQFP footprint and source availability.
This page consolidates verified distributor specifications, lifecycle information, sourcing context, and design-focused guidance for engineers evaluating the DP83840AVCE. It also distinguishes confirmed data from specifications that require review of the complete manufacturer datasheet before PCB release.
Аналоги без доработки для DP83840AVCE — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
DP83840AVCE/NOPB
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
DP83840AVCE Характеристики
| Controller Type | Ethernet Physical Layer Controller |
| Data Rate Support | 10 Mb/s and 100 Mb/s |
| Copper Network Standard | 10BASE-T and 100BASE-TX |
| Fiber Network Standard | 100BASE-X |
| IEEE Interface | IEEE 802.3af |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Ток потребления | 335 mA |
| Корпус | 100-PQFP (14 mm x 20 mm) |
| Число выводов | 100 pins |
| Packaging | Tray |
| Тип монтажа | Surface Mount |
| Cable Support | Category 5 unshielded twisted pair, Type 1 shielded, and fiber optic cables |
| Статус RoHS | Compliant |
Руководство по цоколевке DP83840AVCE в корпусе 100-pqfp (14 mm x 20 mm)
Цоколевка для DP83840AVCE (корпус 100-pqfp (14 mm x 20 mm)). Нумерация выводов, функции и схемы подключения определены в техническом описании производителя. Обратитесь к нему для точного посадочного места и рекомендаций по пайке.
Нет подробных данных о распиновке для DP83840AVCE.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
DP83840AVCE подходит для 6 применениеs: Industrial Ethernet Equipment, Embedded Network Interface, Network Interface Appliances, Test and Measurement Systems, Communications Infrastructure, Legacy Network Upgrade Projects.
Industrial Ethernet Equipment
The DP83840AVCE is suitable for industrial Ethernet equipment that must connect a digital controller to a 10 Mb/s or 100 Mb/s copper network. Its verified 10BASE-T and 100BASE-TX support, 4.75 V to 5.25 V supply range, and approximately 335 mA current specification provide a clear basis for power and interface planning. The device can sit between a network MAC or embedded processor and an isolation transformer or RJ45 network connector. Engineers must follow the manufacturer reference circuit for magnetics, termination, clocking, decoupling, and routed differential pairs. Because the part is listed as obsolete by one distributor, an industrial design should obtain current supply assurance and validate the complete design against the manufacturer datasheet before production release.
Embedded Network Interface
The DP83840AVCE can provide the physical layer for an embedded processor or communications controller that requires legacy Ethernet connectivity. The PHY supports 10 Mb/s and 100 Mb/s rates, allowing the same hardware to interoperate with both Fast Ethernet and 10BASE-T networks. The 100-pin PQFP footprint is substantial compared with modern highly integrated PHYs, so board-area planning must include the surrounding magnetics, clock support, and routing clearances. The approximately 335 mA listed supply current should be included in regulator and thermal assessments. Production use also requires confirmation that obsolete-device inventory can be sourced consistently and that all timing, temperature, and ESD requirements are satisfied by the complete manufacturer documentation.
Network Interface Appliances
The DP83840AVCE is appropriate for network interface appliances that need a deterministic 10/100 copper Ethernet port rather than a modern multi-gigabit interface. Its verified 10/100BASE-T/TX capability can simplify compatibility with legacy plant, laboratory, or building networks. Designers should use the manufacturer application topology to select the network magnetics and implement controlled 100-ohm differential routing from the PHY to the connector. The 4.75 V to 5.25 V operating range requires a stable 5 V rail, while the listed 335 mA current helps define that regulator's capacity. Lifecycle verification is especially important because at least one distributor identifies the device as obsolete, and long-lived appliances need documented source continuity.
Test and Measurement Systems
The DP83840AVCE can be used in test and measurement systems that require an Ethernet control or data path on a legacy 10BASE-T or 100BASE-TX link. Its dual-rate support allows a single physical design to accommodate older laboratory infrastructure as well as Fast Ethernet networks. The 100-pin PQFP package provides access to the required PHY functions but demands careful grounding, decoupling, and differential-pair layout to avoid degrading network performance. Engineers should consult the manufacturer reference design for supported magnetics and board stack-up rather than improvising the physical layer. Obsolete-product availability and the absence of current standardized pricing make lifecycle planning and authorized-channel purchasing essential for measurement platforms with long qualification cycles.
Communications Infrastructure
The DP83840AVCE can support legacy communications infrastructure where 10 Mb/s or 100 Mb/s Ethernet links remain more practical than a newer Ethernet architecture. Its verified support for 10BASE-T, 100BASE-TX, and 100BASE-X enables copper-oriented designs and suggests flexibility for optical-media integration when the associated external circuitry is designed according to the manufacturer guidance. The 5 V supply requirement and approximately 335 mA current should be incorporated into cabinet-level power budgeting. Its large 100-pin PQFP footprint may be less attractive for new compact equipment, and the reported obsolete status makes lifecycle qualification necessary. Any deployment should include regression testing of link negotiation, cable reach, isolation, and interoperability with the intended network infrastructure.
Legacy Network Upgrade Projects
The DP83840AVCE is useful when maintaining or selectively modernizing equipment that must interoperate with an established 10BASE-T or 100BASE-TX network. Retaining this PHY can avoid changing the media-access architecture while preserving a known 100-pin PQFP footprint for an existing board revision. The verified 4.75 V to 5.25 V operating range and approximately 335 mA supply current allow direct comparison with the incumbent circuit. However, engineers must verify every pin function, clock arrangement, reset behavior, and magnetics selection from the manufacturer datasheet before treating it as a replacement. Since one distributor reports obsolete status, an upgrade project should include authorized sourcing, counterfeit-risk controls, and a planned migration path to an active PHY for future revisions.
Справочные инженерные данные для DP83840AVCE — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | DP83840AVCE/NOPB |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 100-PQFP (14 mm x 20 mm) | 100-PQFP (14 mm x 20 mm) |
| Controller Type | Ethernet Physical Layer Controller | Ethernet Physical Layer Controller |
| Supported Data Rates | 10 Mb/s and 100 Mb/s | 10 Mb/s and 100 Mb/s |
| Copper Standard | 10BASE-T and 100BASE-TX | 10BASE-T and 100BASE-TX |
| Supply Voltage Range | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Supply Current | 335 mA | 335 mA |
| IEEE Interface | IEEE 802.3af | IEEE 802.3af |
Ключевые отличия
- Supports both legacy and Fast Ethernet rates in one physical interface (против DP83847ALQA56A)
- Existing 14 mm by 20 mm PQFP footprint (против DP83847ALQA56A)
- Clear 5 V operating envelope (против DP83840AVCE/NOPB)
Заметки по проектированию
Use the manufacturer reference layout and keep the 100BASE-TX differential pair from the PHY to the network magnetics short, continuous, and impedance-controlled. Provide the specified decoupling at the supply pins and avoid placing noisy digital or switching-regulator traces beneath the PHY and differential region. Because the supplied evidence does not include the complete pin map or layout constraints, engineers must resolve both directly from the manufacturer datasheet before fabrication.
The verified supply-current value is approximately 335 mA at a 4.75 V to 5.25 V operating supply. Size the local 5 V regulator, copper paths, and power-plane area with that current plus the required design margin rather than using a nominal average alone. Place the input and bypass capacitors according to the manufacturer layout guidance and evaluate voltage ripple at the PHY because Ethernet link performance can be sensitive to a noisy or unstable supply.
Do not treat the DP83847ALQA56A as a direct replacement: the available comparison identifies a 56-pin WQFN package instead of the DP83840AVCE's 100-pin PQFP. Likewise, do not substitute generic Ethernet transceivers solely by data rate. A legitimate replacement requires the same footprint, pin functions, supply range, media behavior, clocking, and reset requirements, together with verified long-term source availability.
Estimated power use from the verified 5 V operating point and 335 mA supply-current listing is approximately 1.68 W before accounting for other board loads. Estimated: 5 V x 0.335 A = 1.675 W. Actual dissipation can differ because the listed current may not represent every operating mode. Use this estimate for preliminary thermal planning, then confirm worst-case supply consumption, ambient temperature, and junction limits in the manufacturer datasheet.
Информация о соответствии
The Xecor comparison result describes the DP83840AVCE as meeting RoHS requirements. No verified REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was supplied.
