USB2422I-CP-TR - 2-Port USB 2.0 Hub Controller, 24-QFN | Microchip
Teilenummer: USB2422I-CP-TR ✓ AktivUSB2422I-CP-TR Übersicht
A USB hub controller is a semiconductor that manages traffic between one upstream USB host port and multiple downstream device ports. In the USB hierarchy it sits below a USB host controller, above USB peripherals, and inside the wider class of interface ICs. Unlike a host controller that enumerates the whole bus, a hub controller segments a single USB segment into multiple ports, adding tiered topology, port over-current detection and per-port power management to embedded designs.
The USB2422 uses a single transaction translator architecture, which keeps die area and system cost low for embedded hubs. All USB port resistors are integrated: every required series termination resistor on the D+ and D- pins, all required pull-down and pull-up resistors on D+ and D-, and internal pull-up resistors on the downstream-facing over-current sense inputs. That integration removes external discrete networks from the USB port layout.
The controller attaches upstream as a Hi-Speed and Full-Speed hub or as a Full-Speed-only hub, giving the designer a path to reuse one PCB across both high-speed and legacy USB peripherals. Downstream port support covers Low-Speed, Full-Speed and Hi-Speed devices, so keyboards, mass storage, HID and composite peripherals can coexist behind the hub. The SMBus 1.0 specification voltage, power and timing characteristics are met for slave-only devices, with the noted exceptions documented in the datasheet.
Typical embedded uses include industrial HMI panels, medical instrument consoles, set-top and smart-home gateways, USB-to-serial and USB-to-Ethernet bridges, and multi-port charging and docking stations. The 24-QFN package with a compact 4 x 4 mm footprint supports dense board layouts where connector count is constrained.
One key design consideration is port power budgeting: each downstream port must source current per the USB specification, so the board supply and any port-current switches must be sized for the worst case of all ports loaded simultaneously, not the nominal single-device case.
This page combines the manufacturer hub controller description, package and feature data with practical port-resistor, thermal and layout guidance, drop-in alternatives and a parameter comparison that is not consolidated in a single manufacturer document.
Drop-in-Alternativen für USB2422I-CP-TR – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit USB2422I-CP-TR (gleiche Bauform und Footprint) – abweichend in Package, Product Type, Number of Downstream Ports, Package Type, Supported Downstream Speeds.
USB2422-CP-TR
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →USB2412-DZK-TR
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →USB2227-NU-05
✅ Drop-In ⚠️ Spezifikationen ungeprüftPreis auf Anfrage
Datenblatt ansehen →USB2005-MV-01
✅ Drop-In ⚠️ Spezifikationen ungeprüftPreis auf Anfrage
Datenblatt ansehen →USB2422I/CH
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
USB2422I-CP-TR Technische Daten
| Device Type | USB 2.0 hub controller with 2 downstream ports |
| USB Specification | USB 2.0 |
| Number of Downstream Ports | 2 |
| Upstream Port Modes | Hi-Speed and Full-Speed hub, or Full-Speed-only hub |
| Supported Downstream Speeds | Low-Speed, Full-Speed, Hi-Speed |
| Architecture | Single transaction translator |
| Gehäuse | 24-pin QFN (4 x 4 mm) |
| Series Termination Resistors | Integrated on all D+ and D- pins |
| Pull-Up / Pull-Down Resistors | All required USB pull-up and pull-down resistors integrated |
| Over-Current Sense Inputs | Internal pull-up resistors on downstream-facing ports |
| SMBus Compliance | SMBus 1.0 voltage, power and timing characteristics for slave-only devices |
| Number of I/O Pins | 24 |
USB2422I-CP-TR 24-pin qfn (4 x 4 mm) Pinbelegungsleitfaden
Pinbelegung für USB2422I-CP-TR (24-pin qfn (4 x 4 mm)-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für USB2422I-CP-TR.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
USB2422I-CP-TR ist geeignet für 6 Anwendungs: Industrial HMI Panel USB Hub, Medical Instrument Console, USB-to-Serial and USB-to-Ethernet Bridge, Docking Station and Multi-Port Charging Hub, Set-Top Box and Smart-Home Gateway, Portable Test and Measurement Instrument.
Industrial HMI Panel USB Hub
The USB2422I-CP-TR adds two downstream USB 2.0 ports to an industrial human-machine interface without adding a discrete hub chipset footprint. Because the device can attach upstream as a Hi-Speed and Full-Speed hub or as a Full-Speed-only hub, a single board can serve legacy barcode scanners and keyboards alongside high-bandwidth data loggers. All series termination resistors on the D+ and D- pins, plus the required pull-up and pull-down resistors, are integrated into the hub, so the PCB around each connector stays free of discrete resistor networks. In an industrial enclosure where temperature excursions are common, the industrial-grade -I ordering option of the 24-QFN part keeps the hub within its rated operating limits.
Empfohlen
Medical Instrument Console
Diagnostic and patient-monitoring consoles typically need to accept several USB peripherals such as keyboards, touch panels and storage media from a single host port. The USB2422I-CP-TR provides two downstream ports in a compact 24-QFN footprint, which preserves board area for analog front ends. Downstream support for Low-Speed, Full-Speed and Hi-Speed devices allows HID, mass storage and composite peripherals to coexist behind the hub, and the hub's SMBus 1.0 conformance for slave-only devices supports connected equipment that monitors the bus. Because every required USB pull-up and pull-down resistor is on-chip, connector routing stays short and the layout contains fewer components to qualify for medical equipment.
Empfohlen
USB-to-Serial and USB-to-Ethernet Bridge
Legacy serial ports and isolated Ethernet links are often exposed over USB in embedded gateways. The USB2422I-CP-TR acts as the two-port USB 2.0 hub that feeds these bridges from a single upstream connection, and the option to run as a Full-Speed-only hub simplifies firmware when only low-bandwidth CDC or HID bridges are attached. The single transaction translator architecture keeps the silicon and power budget small compared with a multi-port hub chipset, and the integrated D+ and D- termination resistors mean the bridge boards need no external resistor networks. The 4 x 4 mm 24-QFN outline leaves room for the bridge's isolation and magnetics in the same enclosure.
Empfohlen
Docking Station and Multi-Port Charging Hub
Docking stations and desk-top charging hubs need to expose several USB ports from one host port while keeping board area and cost low. The USB2422I-CP-TR delivers two downstream ports with the D+ and D- termination, pull-up and pull-down resistors already integrated, so the connector section of the board is dominated by the receptacles and the port power path. The downstream over-current sense inputs have internal pull-ups, which simplifies the connection to port power switches and lets a system monitor fault conditions on each port. In a charging hub the hub controller handles enumeration and transaction translation while the port power switches handle current, keeping the USB data path compliant without an external hub chipset.
Empfohlen
Set-Top Box and Smart-Home Gateway
Set-top and smart-home gateway designs often expose a USB port for storage, keyboards or a local update stick, while the internal system also needs a hub for diagnostic access. The USB2422I-CP-TR provides that two-port USB 2.0 hub in a 24-QFN package with all port resistors integrated, which keeps the BOM small for cost-sensitive consumer gateways. Low-Speed, Full-Speed and Hi-Speed downstream support means a HID remote, a USB stick and a network adapter can all attach behind the same controller. The choice between Hi-Speed plus Full-Speed upstream mode and Full-Speed-only mode lets the firmware trade throughput for simpler behaviour when only low-speed accessories are present.
Empfohlen
Portable Test and Measurement Instrument
Portable analyzers and bench instruments need USB connectivity for data logging and PC control, often through a single connector on a crowded front panel. The USB2422I-CP-TR adds two downstream ports in a compact 4 x 4 mm 24-QFN footprint that can sit behind the instrument's existing upstream port, expanding a one-port design into a two-port hub without a separate hub module. With the required series termination and bias resistors integrated, USB routing between the controller and the connectors is short and repeatable, which helps keep eye-diagram margins consistent across production units. The industrial-grade option suits instruments used in field service environments with wide ambient temperature variation.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für USB2422I-CP-TR – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | USB2422-CP-TR | USB2412-DZK-TR | USB2227-NU-05 | USB2005-MV-01 | USB2422I/CH |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-24 (4 x 4 mm) | QFN-24 (4 x 4 mm) - same | QFN-24 (4 x 4 mm) - same | QFN-24 (4 x 4 mm) - same | QFN-24 (4 x 4 mm) - same | QFN-24 (4 x 4 mm) - same |
| Device Type | USB 2.0 hub controller, 2 downstream ports | USB 2.0 hub controller, 2 downstream ports | USB 2.0 hub controller, 2 downstream ports | USB 2.0 hub controller, 2 downstream ports | USB 2.0 hub controller, 4 downstream ports | USB 2.0 hub controller, 2 downstream ports |
Wichtigste Unterscheidungsmerkmale
- Full USB port resistor integration reduces external discrete count (vs. USB2412-DZK-TR)
- Configurable upstream mode supports Hi-Speed plus Full-Speed or Full-Speed-only (vs. USB2227-NU-05)
- Industrial temperature grade in a 4 x 4 mm QFN-24 footprint (vs. USB2422-CP-TR)
- Two downstream ports instead of four for smaller dock designs (vs. USB2005-MV-01)
Designhinweise
Route D+ and D- as a tightly coupled, length-matched pair directly from the USB2422I-CP-TR pins to the downstream connectors, keeping the traces short and over a continuous ground plane. Because all series termination resistors and the required pull-up and pull-down resistors are integrated on-chip, do not add discrete terminations at the connectors, and avoid stubs or test pads on the data nets. A clean point-to-point USB 2.0 path is what allows the hub to operate reliably at Hi-Speed.
Estimated: with two downstream ports at the USB 2.0 maximum bus draw of 500 mA per port and 5 V, the hub data path can require about 1 A of downstream current. The USB2422I-CP-TR itself is specified as a low-power controller, but the board supply, port power switches and any upstream current-limiting device must be sized for the worst case where both ports load simultaneously. Do not rely on the nominal single-device case when selecting the upstream regulator or protection FET.
The commonest mistake in USB2422 designs is adding external 15 kohm pull-ups or 22 ohm series resistors on the D+ and D- lines, because those networks are already integrated inside the hub controller. A second frequent error is treating the downstream over-current sense inputs as plain logic inputs; they already carry internal pull-ups and are intended to be wired to port power switch fault outputs, so the reference design in the data sheet should be followed exactly for over-current detection.
The 24-QFN package has a limited exposed-pad area, so place the USB2422I-CP-TR over a solid ground pour and connect the exposed pad to ground with a full array of vias. In an enclosed instrument where the hub sits next to a switching supply or a linear regulator dissipating several watts, add thermal relief around the pad and keep the USB data traces away from heat sources, since controller junction temperature rise translates directly into the industrial temperature margin you paid for with the -I grade.
Compliance-Informationen
The USB2422 data sheet (document 00001726B) covers SMBus 1.0 conformance for slave-only devices and USB 2.0 hub operation. RoHS, REACH, halogen-free and conflict-minerals statements were not present in the available documentation and must be confirmed with the manufacturer before release.
