USB2503-HZH - 3-Port USB 2.0 Hub Controller | Microchip
MPN: USB2503-HZH ✗ Cuối đờiUSB2503-HZH Tóm tắt
A USB hub controller is a line/bus controller that expands a single upstream USB port into multiple downstream ports while handling protocol translation, power management, and device enumeration. The USB2503 belongs to the hub controller family, which sits within the broader USB interface IC category and the overall peripheral controller hierarchy. The device integrates a Transaction Translator (TT) per port using Microchip's MultiTRAK technology, which improves concurrent bandwidth by allowing multiple full-/low-speed devices to operate simultaneously without bandwidth contention.
Key features include pin-selectable default configuration, optional EEPROM or SMBus microcontroller configuration, integrated 1.8 V core LDO, support for both bus-powered and self-powered modes, dynamic port-power switching, and per-port overcurrent detection. The 48-QFN-EP package provides an exposed thermal pad for enhanced heat dissipation and a 0.5 mm pitch for compact PCB layout. The device operates from 3.0 V to 3.6 V and supports a 0 °C to 70 °C commercial temperature range.
Architecturally, the USB2503 combines a USB 2.0 physical layer, serial interface engine, hub repeater, three transaction translators, and port-control logic on a single die. The integrated USB transceivers support both high-speed (480 Mb/s) and full-speed (12 Mb/s) signaling, with internal pull-up/pull-down resistors defined by the USB specification. Configuration via an external I2C EEPROM or an SMBus-capable microcontroller enables vendor ID, product ID, port-remap, and non-removable-port settings without firmware changes to the host.
Typical applications include USB port expansion in desktop PCs, docking stations, monitors with built-in USB hubs, industrial PCs, point-of-sale terminals, embedded computing platforms, and USB-equipped printers. Designers select this part when a 3-port USB 2.0 hub is needed with no firmware investment and minimal BOM cost.
When designing with this part, ensure downstream-port power filtering complies with USB 2.0 inrush and voltage-drop budgets, and connect 10 kΩ pull-ups on SDA/SCL per the SMBus 1.0 specification. The exposed pad must be soldered to the ground plane to meet thermal and EMI performance.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives such as the USB2513B-AEZC family, and practical layout notes not consolidated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho USB2503-HZH — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với USB2503-HZH (cùng hình factor và footprint) — khác nhau ở Package, MSL Level, Power Mode, Product Type, USB Specification.
USB2513B-AEZC
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →USB2513B-AEZC-TR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →USB2503-HZH Thông số kỹ thuật
| Device Type | USB Hub Controller |
| USB Specification | USB 2.0 Compliant |
| Number of Downstream Ports | 3 |
| Upstream Port Speed | High-Speed / Full-Speed / Low-Speed |
| Downstream Port Speed | High-Speed (480 Mb/s) / Full-Speed (12 Mb/s) / Low-Speed (1.5 Mb/s) |
| Transaction Translators | 3 (one per port, MultiTRAK) |
| Supply Voltage (Vcc) | 3.0 V to 3.6 V |
| Core LDO Output | 1.8 V (internal) |
| Nhiệt độ hoạt động | 0 °C to +70 °C |
| Hộp | 48-QFN-EP (7x7 mm, 0.5 mm pitch) |
| Kiểu lắp đặt | Surface Mount |
| Configuration Interface | Pin straps / I2C EEPROM / SMBus |
| Power Mode | Bus-powered or self-powered |
| Overcurrent Detection | Per port (external power switch required) |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 3 |
| Lead-Free | Yes |
Cấu hình chân USB2503-HZH
| Chân 1 | USBDM_DN1 — Downstream port 1 D- data line |
| Chân 2 | USBDP_DN1 — Downstream port 1 D+ data line |
| Chân 3 | VCC — 3.3 V supply input |
| Chân 4 | USBDM_DN2 — Downstream port 2 D- data line |
| Chân 5 | USBDP_DN2 — Downstream port 2 D+ data line |
| Chân 6 | GND — Ground |
| Chân 7 | USBDM_DN3 — Downstream port 3 D- data line |
| Chân 8 | USBDP_DN3 — Downstream port 3 D+ data line |
| Chân 9 | OC1_N — Overcurrent detect, downstream port 1 (active low) |
| Chân 10 | PWR1_N — Power switch enable, downstream port 1 (active low) |
| Chân 11 | OC2_N — Overcurrent detect, downstream port 2 (active low) |
| Chân 12 | PWR2_N — Power switch enable, downstream port 2 (active low) |
| Chân 13 | OC3_N — Overcurrent detect, downstream port 3 (active low) |
| Chân 14 | PWR3_N — Power switch enable, downstream port 3 (active low) |
| Chân 15 | SELF_PWR — Self-powered / bus-powered mode strap |
| Chân 16 | MINI_B — Mini-B or micro-AB upstream port indicator strap |
| Chân 17 | CFG_SEL0 — Configuration select 0 (shared with SCL) |
| Chân 18 | CFG_SEL1 — Configuration select 1 (shared with SDA) |
| Chân 19 | SDA — SMBus data (I2C EEPROM data) |
| Chân 20 | SCL — SMBus clock (I2C EEPROM clock) |
| Chân 21 | RESET_N — Device reset (active low) |
| Chân 22 | XTALIN — 24 MHz crystal input |
| Chân 23 | XTALOUT — 24 MHz crystal output |
| Chân 24 | GND — Ground |
| Chân 25 | USBDM_UP — Upstream D- data line |
| Chân 26 | USBDP_UP — Upstream D+ data line |
| Chân 27 | VBUS_SENSE — Upstream VBUS presence detect |
| Chân 28 | PRTPWR_EN — Port power enable strap |
| Chân 29 | GANG_N — Ganged power-control strap |
| Chân 30 | HS_IND — High-speed indicator strap |
| Chân 31 | NC — Not connected (per datasheet) |
| Chân 32 | NC — Not connected (per datasheet) |
| Chân 33 | NC — Not connected (per datasheet) |
| Chân 34 | NC — Not connected (per datasheet) |
| Chân 35 | NC — Not connected (per datasheet) |
| Chân 36 | NC — Not connected (per datasheet) |
| Chân 37 | NC — Not connected (per datasheet) |
| Chân 38 | NC — Not connected (per datasheet) |
| Chân 39 | NC — Not connected (per datasheet) |
| Chân 40 | NC — Not connected (per datasheet) |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
| Chân 45 | NC — Not connected (per datasheet) |
| Chân 46 | NC — Not connected (per datasheet) |
| Chân 47 | NC — Not connected (per datasheet) |
| Chân 48 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
USB2503-HZH phù hợp cho 6 Áp dụngs: Desktop PC USB Port Expansion, Docking Station USB Hub, USB Monitor Hub, Point-of-Sale Terminal, Embedded Industrial PC, USB Printer Multi-Port.
Desktop PC USB Port Expansion
The USB2503-HZH expands a single upstream USB 2.0 port into three downstream ports in desktop PCs and workstation mainboards, supporting high-speed (480 Mb/s), full-speed (12 Mb/s), and low-speed (1.5 Mb/s) devices concurrently via per-port MultiTRAK transaction translators. Placing the hub downstream of the chipset USB root port allows four external ports (one upstream + three downstream) with no firmware investment. The 48-QFN-EP footprint keeps the hub under 50 mm², leaving board space for downstream ESD protection. Designers should place the hub near the upstream connector to minimize high-speed signal stub length and meet USB 2.0 signal-integrity masks.
Được đề xuất
Docking Station USB Hub
In docking stations, the USB2503-HZH provides three USB 2.0 downstream ports to support keyboard, mouse, and storage devices attached to a notebook. The integrated per-port overcurrent detection and SMBus configuration interface allow dynamic port-disable policies under host control, useful for managed enterprise docks. The 3.3 V single-supply rail simplifies power-tree design alongside the dock's 5 V VBUS. Compared with discrete USB repeaters, the integrated hub cuts BOM by 30% and removes the need for hub firmware development.
Được đề xuất
USB Monitor Hub
USB monitors with built-in hubs use the USB2503-HZH to feed internal USB 2.0 downstream ports while presenting as a single upstream device to the host PC. The 48-QFN-EP package's 0.5 mm pitch matches typical monitor controller PCB densities. Per-port transaction translators keep mouse, keyboard, and webcam traffic isolated, preventing bandwidth contention during video calls. The exposed pad provides adequate thermal dissipation for the always-on commercial environment of a desktop monitor.
Được đề xuất
Point-of-Sale Terminal
POS terminals rely on the USB2503-HZH to attach barcode scanners, receipt printers, customer displays, and magnetic-stripe readers through three downstream USB 2.0 ports. The hub's per-port overcurrent inputs interface with self-resetting polyfuses to meet IEC 60950 fault-current requirements. SMBus configuration allows the integrator to disable unused ports and fix VID/PID without EEPROM programming tools. The 0 to 70 °C commercial temperature range suits indoor retail environments.
Được đề xuất
Embedded Industrial PC
Embedded IPCs and panel PCs integrate the USB2503-HZH to provide service-port connectivity for diagnostics, programming, and USB peripherals on the front panel. The hub's optional SMBus slave interface allows the panel-PC's supervisory microcontroller to enumerate port status and disable rogue devices. MultiTRAK per-port transaction translators keep simultaneous full-speed and low-speed traffic deterministic for time-critical control peripherals. The 48-QFN-EP package supports reflow assembly compatible with industrial PCBA processes.
Được đề xuất
USB Printer Multi-Port
Multi-function printers use the USB2503-HZH to expose host-side USB ports for print-job ingestion, scan-to-USB, and front-panel media readers through a single upstream port. The hub's 3.0 to 3.6 V supply range aligns with the printer's 3.3 V system rail, eliminating the need for a separate LDO. The internal 1.8 V core regulator reduces external components and improves EMI by removing a switching supply. Compared to discrete USB repeater designs, the integrated hub reduces PCB area by roughly 40% in the printer's controller bay.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho USB2503-HZH — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | USB2513B-AEZC | USB2513B-AEZC-TR | USB2513-I/M2 |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-QFN-EP (7x7 mm) | 48-QFN-EP (7x7 mm) - same | 48-QFN-EP (7x7 mm) - same | 36-SQFN (6x6 mm) - different |
| USB Ports (Downstream) | 3 | 3 | 3 | 3 |
| USB Speed Support | USB 2.0 (LS/FS/HS) | USB 2.0 (LS/FS/HS) | USB 2.0 (LS/FS/HS) | USB 2.0 (LS/FS/HS) |
| Transaction Translators | 3 (per port, MultiTRAK) | 3 (per port, MultiTRAK) | 3 (per port, MultiTRAK) | 3 (per port, MultiTRAK) |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Lifecycle Status | NRND | Active | Active | Active |
| Configuration Interface | Pin-strap / I2C / SMBus | Pin-strap / I2C / SMBus | Pin-strap / I2C / SMBus | Pin-strap / I2C / SMBus |
| Operating Temperature | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C | -40 °C to +85 °C |
Bảo phân biệt quan trọng
- Pin-compatible recommended replacement in the same footprint (vsUSB2513B-AEZC)
- Industrial temperature option in a smaller package (vsUSB2513-I/M2)
- Per-port MultiTRAK transaction translators (vsSingle-TT hub controllers)
Ghi chú thiết kế
Route the USB 2.0 high-speed differential pairs (USBDP/USBDM) with 90 Ω differential impedance, keep trace length mismatch under 150 mil, and place the hub within 50 mm of the upstream connector to meet USB 2.0 signal-integrity masks. The exposed thermal pad must be soldered to a continuous ground plane with at least 4 thermal vias (0.3 mm diameter) for adequate heat spreading. Decouple VCC with a 1 µF X7R ceramic close to the supply pin and a 4.7 µF bulk capacitor within 5 mm of the package.
Each downstream port requires an external USB power switch (per-port or ganged) controlled by PWR1_N/PWR2_N/PWR3_N with overcurrent feedback on OC1_N/OC2_N/OC3_N. Select a switch with 1.5 A continuous and 2.5 A short-circuit current limit, plus a self-resetting polyfuse or eFuse, to meet USB 2.0 VBUS drop and inrush budgets. For self-powered hubs, drive SELF_PWR high and ensure VBUS switches are powered from the local 5 V regulator, not from the upstream VBUS.
Do not omit the 24 MHz crystal or its associated load capacitors (per datasheet typical values 12 to 22 pF), since the internal USB PLL requires a stable reference within ±50 ppm. The SDA/SCL lines must be pulled up to VCC (3.3 V) with 10 kΩ resistors per SMBus 1.0 specification; missing pull-ups prevent EEPROM configuration from loading. Avoid leaving CFG_SEL0/CFG_SEL1 floating - use explicit strap resistors to the documented default values for boot-time configuration.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Not AEC-Q100 qualified (commercial grade only). Industrial temperature variants available in USB2513 family. Halogen-free status not explicitly stated in the verified data.
