TMC2005-JT - 5-Port ARCNET Hub Controller | Microchip
部品番号: TMC2005-JT ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $27.1958 | $27.20 |
| 10 | $27.1958 | $271.96 |
| 100 | $27.1958 | $2,719.58 |
| 500 | $27.1958 | $13,597.90 |
| 1,000 | $27.1958 | $27,195.80 |
TMC2005-JT 概要
An ARCNET hub controller is an interface IC in the ARCNET networking hierarchy. It sits between a host processor and external network transceivers, manages access to shared ARCNET media, and expands a network whose node count and cable length are constrained by transceiver electrical capacity. The TMC2005 is intended for embedded systems that need structured cabling, industrial networking, building automation, transportation equipment, or legacy factory data networks rather than general-purpose Ethernet connectivity.
Verified device features include a 5-port hub arrangement, a parallel interface, support for HYC9088, RS-485, HYC5000/4000/2000, and TTL optical-module interfaces, and the ability to operate three different transceiver types simultaneously. It can also connect multiple TMC2005 devices to expand hub count. Network nodes connected to one hub must still use the same data rate because the controller does not perform data-rate conversion.
The internal digital PLL and receive buffer are particularly useful on noisy or long industrial networks where sampling jitter could corrupt frames. This filtering improves the reliability of packet reception without requiring all connected nodes to share one physical medium. The parallel processor interface allows the surrounding microcontroller or host logic to configure the hub, monitor status, and service the network.
A typical implementation places the TMC2005 between a host processor and five external transceiver channels, with termination and connector arrangements selected for the installed cable and topology. Power and signal integrity depend on proper transceiver separation, controlled-impedance routing, and grounding. The manufacturer datasheet states that a TTL optical-module interface can be connected alongside other supported transceivers, but all devices in a single network must operate at the same data rate.
This page combines verified manufacturer and distributor information with practical context for ARCNET hub design. It distinguishes controller features from external transceiver duties, highlights the 2.5 Mbit/s jitter-filtering example, and identifies the documentation gaps that should be resolved before a PCB or production qualification. The TMC2005-JT is therefore best treated as a specialized networking interface component rather than a general Ethernet controller.
ドロップイン代替品: TMC2005-JT — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストTMC2005-JT 仕様
| Product Type | ARCNET 5-port hub controller |
| Manufacturer | Microchip Technology |
| Processor Interface | Parallel interface |
| Number of Ports | 5 ports |
| パッケージ | 64-lead TQFP (10 mm x 10 mm) |
| 実装タイプ | Surface mount |
| Jitter Filtering | ±100 ns at 2.5 Mbit/s |
| Receive Clock | 8X clock |
| Buffering | Internal network-data buffer |
| Supported HYC9088 Interface | Supported |
| Supported RS-485 Interface | Supported |
| Supported HYC5000/4000/2000 Interface | Supported |
| Supported TTL Optical-Module Interface | Supported |
| Concurrent Transceiver Types | 3 transceiver types simultaneously |
| Hub Expansion | Multiple TMC2005 hubs can be connected |
| Data-Rate Conversion | Not supported; all nodes in one network must use the same data rate |
TMC2005-JT 64-lead tqfp (10 mm x 10 mm) ピン配置ガイド
TMC2005-JT (64-lead tqfp (10 mm x 10 mm) パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: TMC2005-JT.
詳細は データシート をご参照ください。
主な用途
TMC2005-JT の用途: 6 件s: Industrial ARCNET Backbone Expansion, Building Automation Network Hub, Transportation Subsystem Networking, Legacy Factory Data Acquisition, Mixed-Media ARCNET Gateway, ARCNET Test and Service Console.
Industrial ARCNET Backbone Expansion
The TMC2005-JT is well matched to industrial ARCNET networks that exceed the node count or cable distance supported by a single transceiver branch. Its five-port hub architecture centralizes network expansion while the parallel interface connects the controller to supervisory plant-control logic. According to the manufacturer datasheet, the internal digital PLL filters timing jitter of ±100 ns at 2.5 Mbit/s and places received samples into a buffer, improving robustness on structured cabling. The design must still operate every attached node at one common data rate, and transceiver selection determines the physical medium and isolation characteristics.
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Building Automation Network Hub
Building-automation installations can use the TMC2005-JT when an established ARCNET fieldbus must serve multiple floors, controllers, or equipment groups. The controller manages five hub ports and allows additional TMC2005 units to be linked, providing a way to extend the network beyond one transceiver's electrical capacity. Its receive buffer and jitter filtering are useful where long cable runs, shared media, and asynchronous timing disturbances affect packet sampling. External transceivers still define isolation, reach, and connectorization, so the final network must include suitable surge protection, grounding, and cable qualification.
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Transportation Subsystem Networking
A rail vehicle or transit subsystem can employ the TMC2005-JT as a central ARCNET hub when legacy onboard equipment uses a structured wired network. Five ports allow separate equipment clusters to terminate on one controller, while multiple TMC2005 devices can extend the topology. The manufacturer's stated jitter tolerance of ±100 ns at 2.5 Mbit/s and internal buffering help stabilize frame timing over vehicle wiring. Deployment still requires independent verification of operating temperature, electromagnetic immunity, transient immunity, and environmental qualification because those ratings are not present in the supplied source material.
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Legacy Factory Data Acquisition
The TMC2005-JT can maintain a centralized ARCNET segment for legacy factory data-acquisition equipment that predates Ethernet adoption. Its five-port hub function connects multiple machine controllers without placing all loads on one transceiver branch, while the parallel host interface supports configuration and diagnostics by embedded logic. The internal DPLL and receive buffer improve handling of sampling jitter at the verified 2.5 Mbit/s example. Because this controller cannot convert data rates, all nodes on one network must use the same rate, and obsolete cabling or equipment interfaces must be assessed before production adoption.
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Mixed-Media ARCNET Gateway
The TMC2005-JT is useful in a mixed-media gateway because the manufacturer datasheet states that it can connect three different transceiver types simultaneously. Supported connections identified in the verified material include HYC9088, RS-485, HYC5000/4000/2000, and TTL for an optical module. This enables copper and optical branches to terminate in one controlled ARCNET topology without requiring the hub itself to change the network data rate. Engineers must maintain common clocking across every node and preserve transceiver isolation, impedance, and termination requirements for each medium.
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ARCNET Test and Service Console
The TMC2005-JT can support a service architecture in which diagnostic or configuration equipment reaches an ARCNET network through a controlled hub point. The parallel interface lets host-side test logic access hub behavior, while five ports provide connections to equipment under test, isolation, or network expansion. Jitter filtering and the internal receive buffer assist repeatability when service links introduce timing uncertainty. The controller does not itself provide galvanic isolation or protocol conversion to Ethernet, so those functions require external transceivers, a gateway processor, or both.
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おすすめ製品の概要
エンジニアリング参考データ: TMC2005-JT — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| Package | 64-lead TQFP (10 mm x 10 mm) |
| Brand | Microchip Technology |
| Function | ARCNET 5-port hub controller |
| Host Interface | Parallel interface |
| Jitter Filtering | ±100 ns at 2.5 Mbit/s |
| Receive Buffer | Internal network-data buffer |
| Supported Transceivers | HYC9088, RS-485, HYC5000/4000/2000, and TTL optical module |
| Concurrent Transceiver Types | 3 types simultaneously |
| Data-Rate Conversion | Not supported |
| Hub Expansion | Multiple TMC2005 hubs can be connected |
設計ノート
Keep the parallel host interface and external transceiver connections away from each other as far as the 10 mm by 10 mm TQFP layout allows. Route high-speed clock and data traces as controlled-impedance interconnects over a continuous reference plane, and place termination close to the driven endpoint. Because the controller samples network data with an 8X clock, clock distribution quality and return-path continuity are critical; avoid splitting the supply plane beneath the device or routing transient-prone transceiver outputs across the host interface.
Follow the voltage, current, and decoupling requirements stated in the official manufacturer datasheet before schematic release; the supplied excerpts do not include those values, so no supply figure should be assumed. Provide local high-frequency bypass at each supply pin and separate sensitive logic returns from transceiver return currents where the package and board permit. Do not substitute generic bulk-capacitor values for the manufacturer's stability recommendations, because the external transceivers can introduce large switching and isolation-related transients.
Do not assume that connecting mixed transceiver media permits mixed data rates. The manufacturer datasheet explicitly states that all nodes on one network must operate at the same data rate. Also verify that external transceivers match the selected branch's topology, termination, isolation, and voltage levels. A nominal TTL optical-module connection is not a complete optical design: the engineering team must still select compatible optoelectronic parts and define the connector and fault-protection strategy.
Treat the clock, parallel data, and transceiver paths as separate signal domains. Maintain a continuous return plane, minimize stubs, and place transceiver-side protection close to external connectors so surge and ESD currents do not flow through logic traces. Validate eye margin, setup and hold timing, ringing, and cable reflections in the assembled design using the intended transceiver and cable. The TMC2005's internal jitter filtering helps with network timing, but it does not replace good PCB signal integrity.
コンプライアンス情報
The supplied sources do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. No compliance claim has been inferred.
