USB2504A-JT - USB 2.0 4-Port Hub Controller | Microchip
部品番号: USB2504A-JT ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
USB2504A-JT 概要
A USB hub controller is an interface IC that expands one upstream USB connection into multiple downstream ports while managing transaction translation, enumeration, power, and device connectivity. The USB2504A belongs to the USB interface-controller hierarchy, integrating USB 2.0 connectivity and four-port hub management into a single semiconductor device.
The controller provides four transaction translators, one per downstream port, for independently handling supported USB traffic speeds. It supports per-port or ganged, selectable downstream power control and can detect whether the hub source is bus-powered or self-powered. According to the Microchip product page, the device is fully USB 2.0 compliant and requires no firmware development.
Configuration can begin with pin-selectable defaults, limited strapping options, an external EEPROM, or a microcontroller interface. When configured through a microcontroller, the hub appears as an SMBus slave, allowing an external controller to alter supported configuration options. Dynamic power switching monitors the SELF_PWR input and removes downstream and upstream power when local supply availability changes.
Typical uses include USB 2.0 docking stations, desktop hubs, KVM equipment, external storage interfaces, embedded USB expanders, and industrial peripheral hubs. Four high-speed transaction translators make the controller appropriate when several peripherals must coexist behind one host connection without relying on USB firmware.
PCB design must preserve high-speed USB routing discipline, including a short upstream path, controlled impedance, continuous reference planes, and placement of required decoupling close to the device. The exact pin names, capacitor values, clock requirements, operating temperature, and power ratings must be confirmed against the manufacturer datasheet before layout release.
This page consolidates the verified manufacturer and distributor facts, distinguishes the explicitly supported USB2504-JT cross-reference from unsupported substitutions, and identifies engineering details that still require direct datasheet confirmation.
ドロップイン代替品: USB2504A-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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: USB2504A-JT （同一形状・フットプリント） — 相違点: Full-Speed Support, High-Speed Support, Low-Speed Support, Package, Product Type.
クイック比較ツール — 並列比較する代替部品を選択:
USB2504-JT
✅ ドロップイン✓ 在庫あり
$3.95 / 個
データシートを見る →USB2504A-JT 仕様
| Product Type | Integrated USB 2.0 four-port hub controller |
| USB Standard | USB 2.0 |
| Downstream Port Count | 4 ports |
| Upstream Port Count | 1 port |
| High-Speed Support | 480 Mbit/s |
| Full-Speed Support | 12 Mbit/s |
| Low-Speed Support | 1.5 Mbit/s |
| Transaction Translators | 4, one per downstream port |
| Supply Voltage Range | 3 V to 3.6 V |
| パッケージ | 64-pin TQFP, 10 mm x 10 mm |
| 実装タイプ | Surface mount |
| Power Management | Per-port or ganged, selectable downstream power control |
| Power-Source Detection | Bus-powered or self-powered source detection |
| Configuration Options | Pin-selectable defaults, limited strap options, external EEPROM, or microcontroller interface |
| Firmware Development | Not required |
| RoHS | Compliant |
USB2504A-JT 64-pin tqfp, 10 mm x 10 mm ピン配置ガイド
USB2504A-JT (64-pin 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: USB2504A-JT.
詳細は データシート をご参照ください。
主な用途
USB2504A-JT の用途: 8 件s: Desktop USB 2.0 Hub, USB Docking Station, KVM Peripheral Hub, Industrial USB Peripheral Hub, Embedded USB Expansion Board, External Storage and Data Acquisition Hub, USB-to-Serial Adapter Hub, Test and Configuration Hub.
Desktop USB 2.0 Hub
The USB2504A-JT can expand one host USB connection into four downstream ports for keyboards, storage devices, printers, and other peripherals. Its four transaction translators support the USB 2.0 speed mix of 480 Mbit/s high-speed, 12 Mbit/s full-speed, and 1.5 Mbit/s low-speed. Bus-powered and self-powered detection plus selectable downstream power control help the designer allocate power according to the installed hub source. Because no firmware development is required, the controller can also simplify a compact desk accessory. The principal design constraint is preserving USB signal integrity at 480 Mbit/s through short traces, continuous reference planes, compliant connector geometry, and decoupling placed close to the device.
おすすめ
USB Docking Station
A docking station can place the USB2504A-JT between an upstream host connector and four downstream device ports, providing a shared 480 Mbit/s USB 2.0 path without custom hub firmware. The controller’s per-port or ganged power control allows downstream power to be managed according to the dock’s power architecture, while source detection supports bus-powered and self-powered operating modes. Multiple downstream devices must still share the upstream link’s available bandwidth, and enumeration behavior must be checked against every connected peripheral. USB 2.0 signal-integrity requirements dominate the layout, particularly return-path continuity and avoidance of stubs between the controller, connectors, protection devices, and required passive components.
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KVM Peripheral Hub
The USB2504A-JT fits the USB side of a KVM system where selected keyboard, mouse, storage, or control peripherals must reach a host through one upstream link. Four downstream ports and one transaction translator per port support devices operating across the full verified USB 2.0 speed range. Power-control selection permits either individual port management or ganged behavior, which can simplify implementation when downstream devices are switched as a group. The controller does not itself implement video switching, so the surrounding KVM design must coordinate hub attachment, display transitions, and peripheral sharing. Firmware-free hub operation reduces that controller burden, while the 3 V to 3.6 V requirement still demands careful power budgeting.
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Industrial USB Peripheral Hub
The USB2504A-JT can provide a compact four-port USB interface in industrial equipment that accepts service, data-acquisition, configuration, or storage accessories. Its bus-powered or self-powered source detection is useful when the same hub design must operate across different host-power conditions. The supplied evidence does not state an industrial temperature grade, so environmental qualification must be confirmed before deployment in harsh conditions. Designers should also verify electromagnetic-emissions and immunity requirements for the finished product. USB data routing must remain controlled, and connector-to-controller paths should avoid long unprotected segments. The absence of required hub firmware lowers processor demand, but system monitoring and fault recovery still require appropriate hardware and product-level tests.
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Embedded USB Expansion Board
The USB2504A-JT is useful on an embedded expansion board that converts one USB 2.0 uplink into four isolated peripheral connections. Pin-selectable defaults provide a basic implementation path, while optional EEPROM or microcontroller configuration supports products that need customized behavior. The USB2504A operates from 3 V to 3.6 V, so it must share a compatible digital rail or use suitable level conversion elsewhere. Its no-firmware requirement is valuable in space-constrained systems that lack capacity for dedicated hub code. Designers should still reserve test access, define connector power limits, validate simultaneous enumeration, and ensure every external branch follows high-speed USB routing discipline rather than relying only on nominal trace length.
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External Storage and Data Acquisition Hub
The USB2504A-JT can consolidate storage readers, measurement adapters, and other USB peripherals behind one host port in a portable data-acquisition enclosure. Each of the four downstream positions has its own transaction translator, supporting the verified high-speed, full-speed, and low-speed traffic classes. The hub controller does not provide data aggregation, so acquisition software must coordinate devices and shared bandwidth. For portable equipment, downstream power control can reduce load when ports are unused, while bus-powered and self-powered detection enables flexible input arrangements. The design should calculate worst-case hot-plug current, validate inrush behavior, and route the 480 Mbit/s upstream channel with uninterrupted reference planes and properly placed protection components.
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USB-to-Serial Adapter Hub
A multi-interface adapter can use the USB2504A-JT to provide four downstream USB links for serial, configuration, and service devices. This arrangement is particularly useful where the enclosure needs one host connector but must expose several service ports. The verified 3 V to 3.6 V operating range applies to the hub controller itself, while downstream transceiver levels and connector standards must be handled by separate interface devices. Power-budget calculations should include controller, downstream loads, and conversion losses rather than relying on nominal port current alone. High-speed routing, ESD protection coordination, chassis grounding, and tested hot-plug behavior are essential because external service connectors create more ESD and isolation risks than internal board-to-board connections.
おすすめ
Test and Configuration Hub
The USB2504A-JT can support test systems that need several USB-connected instruments, adapters, or programming fixtures behind one host interface. The four-port architecture reduces connector count, while the no-firmware hub function can simplify host-side setup. Bandwidth sharing is acceptable when devices are not continuously active at the maximum USB 2.0 rate, but worst-case enumeration and burst-transfer behavior should be measured. Instrument isolation and ground-fault risks are product-level concerns that are not solved by the controller. The PCB should separate sensitive analog or measurement grounds where required while preserving the high-speed USB return path. Access to the SELF_PWR input and downstream power controls should also be included in validation to verify behavior during supply transitions.
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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: USB2504A-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 | USB2504-JT |
|---|---|---|
| Package | 64-pin TQFP (10 mm x 10 mm) | 64-pin TQFP (10 mm x 10 mm) |
| Brand | Microchip Technology | Microchip Technology |
| Product Type | Integrated USB 2.0 four-port hub controller | USB 2.0 four-port hub controller |
| USB Standard | USB 2.0 | USB 2.0 |
| Supply Voltage Range | 3 V to 3.6 V | 3 V to 3.6 V |
| Downstream Ports | 4 ports | 4 ports |
| Transaction Translators | 4, one per downstream port | 4 transaction translators |
| Power Management | Per-port or ganged, selectable power control | Full downstream power management |
| Power-Source Detection | Bus-powered or self-powered source detection | Bus-powered and self-powered operation supported |
| New-Design Recommendation | Microchip USB2504A family product page supplied | One cross-reference result states not recommended for new designs |
主な差別化要因
- Verified one-for-one family replacement path （vs USB2504-JT)
- Four independent transaction translators （vs USB2504-JT)
- No-firmware four-port hub implementation （vs USB2504-JT)
設計ノート
Treat the upstream and downstream 480 Mbit/s paths as controlled-impedance USB 2.0 interconnects. Use the current Microchip layout guidance for trace geometry, reference-plane continuity, connector placement, and via transitions; the supplied evidence does not provide exact impedance values or spacing rules. Avoid stubs and unnecessary test pads on high-speed nodes, provide a continuous return path beneath each pair, and validate differential impedance in the actual stack-up before fabrication.
Budget the 3 V to 3.6 V controller supply together with downstream port loads, inrush current, regulator tolerance, and hot-plug behavior. Dynamic power switching monitors SELF_PWR and removes power when source availability changes, so the power-supply design and connector protection must coordinate with that behavior. Exact capacitor values, current limits, and timing values are unavailable in the supplied evidence and must be copied from the manufacturer datasheet rather than estimated.
Place required decoupling and configuration components close to their associated USB2504A-JT pins, and position the upstream connector to minimize the high-speed path back to the hub. The verified package is a 64-pin TQFP, so inspect all perimeter pads during assembly review and verify pin 1 orientation against the package drawing. A complete pin map was not present in the supplied search data, so schematic and layout sign-off must use the official Microchip pin-description table.
Do not treat a newer USB251x device or another vendor’s USB hub controller as a drop-in part solely because it has four ports. The supplied cross-reference verifies only USB2504-JT as package- and terminal-compatible with USB2504A-JT. Before substitution, compare every pin, strap state, supply sequence, configuration method, timing parameter, package drawing, and lifecycle recommendation; functional equivalence alone does not justify reusing the PCB.
コンプライアンス情報
RoHS compliance is stated in the supplied cross-reference result. No verified evidence establishes REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status.
