USB2502-AEY - 2-Port USB 2.0 Hub Controller | SMSC
料号： USB2502-AEY ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
USB2502-AEY 概述
A USB hub controller is an interface semiconductor within the broader USB interface-controller hierarchy. Its function is to manage traffic from one USB host connection across multiple downstream ports while supporting the speed modes permitted by USB 2.0. Configuration can be handled through strapping options, an external EEPROM, or a microcontroller interface; with a microcontroller, the hub operates as an SMBus slave device.
The principal engineering benefits are its two-port integration, upstream Full-Speed or High-Speed attachment, and configurable setup. Downstream devices may operate at Low-Speed, Full-Speed, or High-Speed when the hub is attached to a High-Speed host. This allows one controller to serve keyboards, storage, communications adapters, and other USB peripherals without requiring separate upstream controllers.
Technical implementation requires careful treatment of USB signal integrity, power distribution, grounding, and enumeration. The controller coordinates device attachment and port behavior, but the final system must still meet USB 2.0 layout, capacitance, and power requirements. Exact electrical limits, pin assignments, clock requirements, and package dimensions must be taken from the Microchip manufacturer datasheet rather than inferred from marketplace listings.
Typical uses include compact USB hubs, embedded host systems, docking equipment, peripheral expanders, and industrial adapters. In these systems, USB2502-AEY provides the multi-port coordination logic while external power switches, connectors, crystal or clock circuitry, and supporting passives implement the physical USB interface. Exact bill-of-material requirements should be confirmed against the datasheet reference implementation.
For USB hub layouts, keep high-speed traces short and controlled, provide continuous return paths, place required decoupling close to the device, and validate differential impedance and connector placement in the assembled board. The available data does not state the package pin count, operating-temperature range, voltage limits, or full ordering-code characteristics, so those values must not be guessed.
USB2502-AEY 规格参数
| Product Type | 2-port USB 2.0 hub controller |
| Number of Downstream Ports | 2 ports |
| Upstream Full-Speed Support | 12 Mb/s |
| Upstream High-Speed Support | 480 Mb/s |
| Downstream Low-Speed Support | 1.5 Mb/s |
| Downstream Full-Speed Support | 12 Mb/s |
| Downstream High-Speed Support | 480 Mb/s when attached to a High-Speed host |
| USB Specification | Universal Serial Bus Specification Revision 2.0 |
| Configuration by Strapping | Supported; limited configuration subset |
| External EEPROM Configuration | Supported |
| Microcontroller Configuration | Supported |
| Microcontroller Interface Role | SMBus slave device |
| Package Family | QFN |
| RoHS 状态 | RoHS compliant |
| Lead-Free Status | Lead free |
USB2502-AEY qfn 引脚配置指南
USB2502-AEY（qfn 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： USB2502-AEY.
请参阅 数据手册 以查看完整引脚配置。
典型应用
USB2502-AEY 适用于 6 应用s: Compact USB Hub, Embedded Host Expansion, USB Docking Station, Industrial USB Adapter, Peripheral Expansion Box, Data Acquisition Front Panel.
Compact USB Hub
The USB2502-AEY fits a compact two-port USB hub because it provides two downstream-facing ports from one upstream connection. According to the Microchip datasheet, each downstream port can serve a Low-Speed device at 1.5 Mb/s or a Full-Speed device at 12 Mb/s, while both can support 480 Mb/s operation when the upstream host is High-Speed. The controller handles hub traffic and configuration, while external power switches, connectors, and protection components establish the physical USB ports. Layout should follow the manufacturer reference design and preserve controlled USB differential routing.
Embedded Host Expansion
USB2502-AEY can expand an embedded USB host that already provides one upstream connection but needs two external peripheral ports. The controller can attach as a Full-Speed hub or as a Full-/High-Speed hub and supports Low-Speed, Full-Speed, and qualifying High-Speed downstream devices. Configuration by external EEPROM is useful when settings must be stored independently of boot firmware, while strapping offers limited fixed configuration. System firmware must still enumerate the hub and address devices through the selected USB host stack.
USB Docking Station
The USB2502-AEY is suitable for a docking subsystem that converts one host connection into two peripheral connections. Its verified 2-port architecture is useful for storage, keyboard, network-adapter, or human-interface-device attachments in a limited dock. When paired with a High-Speed host, downstream devices may operate at up to 480 Mb/s according to the manufacturer datasheet. The design must budget port current, maintain low-noise power delivery, and keep connector and high-speed trace placement compatible with USB signal-integrity requirements.
Industrial USB Adapter
USB2502-AEY can form the hub-control section of an industrial USB adapter where one upstream interface must serve two field-facing ports. The verified controller supports two downstream ports and the USB 2.0 speed hierarchy, including 1.5 Mb/s and 12 Mb/s operation and 480 Mb/s operation with a High-Speed host. Environmental suitability cannot be inferred beyond the supplied data; engineers must verify operating-temperature limits, EMC requirements, ESD protection, grounding, and connector isolation in the manufacturer datasheet and system qualification plan.
Peripheral Expansion Box
The USB2502-AEY supports a simple peripheral expansion box that adds two USB connections without implementing multiple independent host controllers. Its downstream ports can support Low-Speed and Full-Speed devices and can reach 480 Mb/s when the upstream link is High-Speed. Strapping may be sufficient for a limited configuration subset, but EEPROM or microcontroller configuration offers more flexibility for product variants, cable attachment behavior, or system-managed settings. External circuitry determines connector protection and available bus power.
Data Acquisition Front Panel
USB2502-AEY is applicable to a data-acquisition front panel that connects a host computer to two instruments or measurement peripherals. The manufacturer datasheet confirms two downstream ports and USB Low-Speed, Full-Speed, and High-Speed modes, enabling compatibility with control peripherals, storage, or data-transfer devices. A microcontroller can configure the hub through its SMBus-slave interface when fixed strapping is insufficient. The implementation should isolate analog and digital grounds appropriately and verify cable shielding, ESD, and power requirements at each connector.
工程参考数据： USB2502-AEY ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Brand | Microchip Technology |
| Package | QFN |
| Product Type | 2-port USB 2.0 hub controller |
| Downstream Ports | 2 ports |
| Low-Speed Support | 1.5 Mb/s |
| Full-Speed Support | 12 Mb/s |
| High-Speed Support | 480 Mb/s when attached to a High-Speed host |
| Configuration Methods | Strapping, external EEPROM, or SMBus-slave microcontroller interface |
| USB Specification | USB 2.0 |
关键差异点
- Documented three-method configuration （对比 USB2512BI-AEZG)
- Two downstream ports with USB 2.0 speed hierarchy （对比 USB2512BI-AEZG)
- Clear upstream operating modes （对比 Generic USB 2.0 hub controllers)
设计说明
Use the Microchip USB2502 datasheet as the authority for the supported layout and follow its reference implementation where possible. Preserve short, continuous return paths for USB differential pairs, avoid discontinuities across plane transitions, and place connector protection close to user-accessible connectors. The available search material does not specify the target differential impedance, so do not invent a dimensional rule; obtain the complete electrical and layout requirements from the manufacturer documentation.
Budget downstream power separately from controller supply power because port-current requirements, protection behavior, and voltage tolerances are not present in the supplied search excerpts. Follow the datasheet limits for the controller and the USB power requirements for each enabled port. The main design risks are excessive inrush, port-current overload, noisy downstream rails, and voltage droop during hot-plug; these should be verified with measurement rather than estimated from generic hub implementations.
Treat upstream and downstream High-Speed USB paths as controlled-impedance interconnects. Keep connector and hub-controller connections mechanically consistent, minimize stubs, provide uninterrupted ground reference, and validate the assembled PCB with suitable high-speed measurements. Because no trace-impedance value is supplied, engineers must obtain it from the applicable USB implementation guidance referenced by the manufacturer rather than assume 90 ohms or another value.
Do not treat a functionally similar USB hub IC as a drop-in substitute without checking its pinout, package, clock, configuration interface, power requirements, and layout. The verified results mention USB2512BI-AEZG only as a comparison target and do not establish compatibility. Likewise, confirming two-port or USB 2.0 operation is insufficient: every board-level requirement, exposed pad connection, enable or strap state, and supported speed must be reviewed before substitution.
合规信息
The verified IC Components listing states lead free and RoHS compliant. REACH, AEC-Q100, halogen-free status, and conflict-minerals information were not supplied.
