USB2503-HZH - 3-Port USB 2.0 Hub Controller | Microchip
Référence : USB2503-HZH ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.84 | $4,84 |
| 10 | $4.36 | $43,60 |
| 100 | $3.88 | $388,00 |
| 500 | $3.49 | $1 745,00 |
| 1 000 | $3.1 | $3 100,00 |
USB2503-HZH Présentation
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.
Alternatives de remplacement direct pour USB2503-HZH — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec USB2503-HZH (même facteur de forme et même empreinte) — différant par MSL Level, Package, Power Mode, USB Specification.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
USB2513B-AEZC
✅ Remplacement direct✓ En stock
$2.78 / unité
Voir la fiche technique →USB2513B-AEZC-TR
✅ Remplacement direct✓ En stock
$2.78 / unité
Voir la fiche technique →USB2503-HZH Spécifications
| 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) |
| Température de fonctionnement | 0 °C to +70 °C |
| Boîtier | 48-QFN-EP (7x7 mm, 0.5 mm pitch) |
| Type de montage | Surface Mount |
| Configuration Interface | Pin straps / I2C EEPROM / SMBus |
| Power Mode | Bus-powered or self-powered |
| Overcurrent Detection | Per port (external power switch required) |
| Statut RoHS | Compliant |
| Niveau MSL | 3 |
| Lead-Free | Yes |
Configuration des broches de USB2503-HZH
| Broche 1 | USBDM_DN1 — Downstream port 1 D- data line |
| Broche 2 | USBDP_DN1 — Downstream port 1 D+ data line |
| Broche 3 | VCC — 3.3 V supply input |
| Broche 4 | USBDM_DN2 — Downstream port 2 D- data line |
| Broche 5 | USBDP_DN2 — Downstream port 2 D+ data line |
| Broche 6 | GND — Ground |
| Broche 7 | USBDM_DN3 — Downstream port 3 D- data line |
| Broche 8 | USBDP_DN3 — Downstream port 3 D+ data line |
| Broche 9 | OC1_N — Overcurrent detect, downstream port 1 (active low) |
| Broche 10 | PWR1_N — Power switch enable, downstream port 1 (active low) |
| Broche 11 | OC2_N — Overcurrent detect, downstream port 2 (active low) |
| Broche 12 | PWR2_N — Power switch enable, downstream port 2 (active low) |
| Broche 13 | OC3_N — Overcurrent detect, downstream port 3 (active low) |
| Broche 14 | PWR3_N — Power switch enable, downstream port 3 (active low) |
| Broche 15 | SELF_PWR — Self-powered / bus-powered mode strap |
| Broche 16 | MINI_B — Mini-B or micro-AB upstream port indicator strap |
| Broche 17 | CFG_SEL0 — Configuration select 0 (shared with SCL) |
| Broche 18 | CFG_SEL1 — Configuration select 1 (shared with SDA) |
| Broche 19 | SDA — SMBus data (I2C EEPROM data) |
| Broche 20 | SCL — SMBus clock (I2C EEPROM clock) |
| Broche 21 | RESET_N — Device reset (active low) |
| Broche 22 | XTALIN — 24 MHz crystal input |
| Broche 23 | XTALOUT — 24 MHz crystal output |
| Broche 24 | GND — Ground |
| Broche 25 | USBDM_UP — Upstream D- data line |
| Broche 26 | USBDP_UP — Upstream D+ data line |
| Broche 27 | VBUS_SENSE — Upstream VBUS presence detect |
| Broche 28 | PRTPWR_EN — Port power enable strap |
| Broche 29 | GANG_N — Ganged power-control strap |
| Broche 30 | HS_IND — High-speed indicator strap |
| Broche 31 | NC — Not connected (per datasheet) |
| Broche 32 | NC — Not connected (per datasheet) |
| Broche 33 | NC — Not connected (per datasheet) |
| Broche 34 | NC — Not connected (per datasheet) |
| Broche 35 | NC — Not connected (per datasheet) |
| Broche 36 | NC — Not connected (per datasheet) |
| Broche 37 | NC — Not connected (per datasheet) |
| Broche 38 | NC — Not connected (per datasheet) |
| Broche 39 | NC — Not connected (per datasheet) |
| Broche 40 | NC — Not connected (per datasheet) |
| Broche 41 | NC — Not connected (per datasheet) |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | NC — Not connected (per datasheet) |
| Broche 45 | NC — Not connected (per datasheet) |
| Broche 46 | NC — Not connected (per datasheet) |
| Broche 47 | NC — Not connected (per datasheet) |
| Broche 48 | NC — Not connected (per datasheet) |
Applications typiques
USB2503-HZH convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour USB2503-HZH — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Pin-compatible recommended replacement in the same footprint (vs USB2513B-AEZC)
- Industrial temperature option in a smaller package (vs USB2513-I/M2)
- Per-port MultiTRAK transaction translators (vs Single-TT hub controllers)
Notes de conception
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.
Informations de conformité
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.
