CY7C65631-56LTXIT - 4-Port USB 2.0 Hub Controller, 480 Mb/s, 56-QFN
MPN: CY7C65631-56LTXIT ✓ ActiveCY7C65631-56LTXIT Overview
A USB hub controller is a dedicated interface IC that sits between a USB host and multiple USB peripherals, managing enumeration, power distribution and transaction translation across a shared USB 2.0 bus. In the power-management hierarchy it sits at the interface tier: USB interface IC -> hub controller -> system connectivity silicon. The EZ-USB HX2LP family was designed for ultra-low-power applications where each downstream port must share a single transaction translator to minimize both silicon area and operating current.
Key features of this device include four downstream ports on one shared transaction translator, full-speed and high-speed (480 Mb/s) USB 2.0 operation, 3.3 V single-supply operation with about 163 mA of operating supply current, and an industrial temperature range of -40 C to +85 C. The controller supports downstream port overcurrent detection and enumeration of standard USB peripherals without requiring an external hub PHY.
The CY7C65631 is built on a CMOS process, and the datasheet states explicitly that it is pin-for-pin compatible with the CY7C65640 hub controller, which makes footprint planning straightforward across two related USB hub designs. A sibling variant, the CY7C65621, shares the same HX2LP family and 56-QFN footprint but targets different port counts.
Typical applications include multi-port USB hubs, laptop and desktop docking stations, set-top box and smart-TV connectivity, industrial human-machine interface panels, USB expansion cards for test and measurement equipment, and automotive infotainment accessories.
The main design consideration is power: because all four downstream ports share one transaction translator, hub current stays low, but the 3.3 V rail must still be sized for the worst-case combination of enabled ports and attached peripherals. Decoupling close to the QFN pads and careful D+/D- routing are equally important, since this controller must deliver clean 480 Mb/s signalling over short board-level traces.
This page consolidates ordering variants, pin-compatibility notes between the CY7C65621, CY7C65631 and CY7C65640 devices, drop-in alternatives and practical PCB design guidance that engineers would otherwise have to piece together from separate datasheets and cross-reference listings.
Drop-in alternatives for CY7C65631-56LTXIT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with CY7C65631-56LTXIT (same form factor and footprint) — differing in Operating Temperature, Package, Package Type, Product Type, Device Type.
CY7C65631-56LTXC
✅ Drop-InContact for price
View Datasheet →CY7C65631-56LTXCT
✅ Drop-InContact for price
View Datasheet →CY7C65640A-LFXC
✅ Drop-InContact for price
View Datasheet →CY7C65621-56LTXIT
✅ Drop-In📋 Reference alternative (not in catalog)
CY7C65630-56LTXC
✅ Drop-InContact for price
View Datasheet →USB2514B-AEZC-TR
✅ Drop-InContact for price
View Datasheet →CY7C65631-56LTXIT Specifications
| Product Type | USB 2.0 Hub Controller (EZ-USB HX2LP Lite) |
| Downstream Ports | 4 |
| Transaction Translators | 1 (shared by all four ports) |
| USB Standard | USB 2.0 |
| Data Rate | 480 Mb/s (High Speed) |
| Supply Voltage | 3.3 V |
| Maximum Supply Voltage | 3.6 V |
| Operating Supply Current | 163 mA |
| Operating Temperature Range | -40 C to +85 C |
| Package | 56-QFN (8x8 mm) |
| Mounting Style | SMD/SMT |
| Process Technology | CMOS |
| Series | CY7C65631 |
| Product Category | USB Interface IC |
| Packaging Type | Cut Tape, Reel |
| Pin Compatibility | Pin-for-pin compatible with CY7C65640 |
| Family | EZ-USB HX2LP Lite Low Power USB 2.0 Hub Controller |
| Lifecycle Status | Active |
CY7C65631-56LTXIT 56-qfn (8x8 mm) Pin Configuration Guide
Pin configuration for CY7C65631-56LTXIT (56-qfn (8x8 mm) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for CY7C65631-56LTXIT.
Refer to the datasheet for full pin configuration.
Typical Applications
CY7C65631-56LTXIT is suitable for 6 applications: Laptop and Desktop Docking Stations, Industrial Human-Machine Interface Panels, Set-Top Box and Smart TV Connectivity, Automotive Infotainment Accessories, Test and Measurement USB Expansion Cards, External Storage and Media Dongle Hubs.
Laptop and Desktop Docking Stations
The CY7C65631-56LTXIT fits docking stations that expose several USB 2.0 ports to a host laptop while keeping board area and current draw low. Four downstream ports share one transaction translator, so a dock built around this controller presents full-speed and high-speed 480 Mb/s peripherals without the silicon cost of four independent translators. With a 3.3 V supply and roughly 163 mA of operating current, the hub leaves headroom on the dock's 5 V input budget, and the -40 C to +85 C range covers desk and mobile accessory environments where temperature cycling is common.
Recommended
Industrial Human-Machine Interface Panels
Industrial HMI panels often need several USB peripherals - a touchscreen controller, a barcode scanner, a printer and a USB key - hung from one host port. The CY7C65631-56LTXIT gives the panel four downstream ports on a single shared transaction translator, which keeps both the controller silicon area and the hub's contribution to the 3.3 V supply current manageable inside a sealed enclosure. The -40 C to +85 C rating matches factory-floor ambient conditions, and 480 Mb/s high-speed operation allows storage devices and camera modules to run at full USB 2.0 speed.
Recommended
Set-Top Box and Smart TV Connectivity
Set-top boxes and smart TVs increasingly expose USB ports for external storage, keyboards and service dongles, and the CY7C65631-56LTXIT lets a single internal USB 2.0 port feed four connectors. Because all four ports share one transaction translator, the hub adds only about 163 mA of operating current at 3.3 V, which matters in designs where the internal supply budget is already shared between the main SoC and video memory. The controller's high-speed 480 Mb/s path keeps external HDD playback and firmware updates fast while the compact 56-QFN (8x8 mm) footprint leaves board area for RF and video routing.
Recommended
Automotive Infotainment Accessories
Infotainment head units often need to expose USB ports for phone charging, media playback and diagnostics, and the CY7C65631-56LTXIT provides four downstream ports with a single shared transaction translator for a compact, low-power hub block. The 3.3 V single-supply operation aligns with the regulated 3.3 V rails typically present in vehicle infotainment processors, and the -40 C to +85 C rating covers the cabin and console temperature range. For designs requiring a formally qualified automotive part number, specify the corresponding automotive-graded ordering option rather than the industrial suffix.
Recommended
Test and Measurement USB Expansion Cards
Instrument front ends and lab peripheral cards frequently need to expose several USB connections to a PC while keeping the host side to a single port. The CY7C65631-56LTXIT gives four downstream ports at 480 Mb/s, which is sufficient for instrument control interfaces, probes and calibration dongles while keeping the 3.3 V supply current near 163 mA for the hub block. Its 56-QFN (8x8 mm) package suits dense instrument mainboards where connector space is limited, and the -40 C to +85 C range supports unheated and lightly heated laboratory equipment.
Recommended
External Storage and Media Dongle Hubs
External enclosures that add several USB storage or media ports to a single USB connection are a natural fit for the CY7C65631-56LTXIT, because four downstream ports can share the available 480 Mb/s high-speed budget without each requiring a separate translator. The single-translator architecture limits the hub's contribution to operating current to about 163 mA at 3.3 V, which helps external enclosures meet bus-powered current limits and run cool during sustained transfers. The compact 56-QFN (8x8 mm) footprint also leaves room for the connector and drive-side circuitry inside small metal enclosures.
Recommended
Recommended Products Summary
Engineering reference data for CY7C65631-56LTXIT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY7C65631-56LTXC | CY7C65631-56LTXCT | CY7C65640 | CY7C65621-56LTXIT | CY7C65630-56LTXC | USB2514B-AEZC-TR |
|---|---|---|---|---|---|---|---|
| Package | 56-QFN (8x8 mm) | 56-QFN (8x8 mm) - same | 56-QFN (8x8 mm) - same | 56-QFN (8x8 mm) - same | 56-QFN (8x8 mm) - same | 56-QFN (8x8 mm) - same | 56-QFN (8x8 mm) - same footprint class |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Microchip Technology |
| Product Type | EZ-USB HX2LP Lite USB 2.0 hub controller | EZ-USB HX2LP Lite USB 2.0 hub controller | EZ-USB HX2LP Lite USB 2.0 hub controller | EZ-USB HX2LP USB 2.0 hub controller | EZ-USB HX2LP Lite USB 2.0 hub controller | EZ-USB HX2LP Lite USB 2.0 hub controller | USB 2.0 hub controller |
| Data Rate | 480 Mb/s (High Speed) | 480 Mb/s (High Speed) | 480 Mb/s (High Speed) | 480 Mb/s (High Speed) | 480 Mb/s (High Speed) | 480 Mb/s (High Speed) | 480 Mb/s (High Speed) |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Pin Compatibility | Pin-for-pin compatible with CY7C65640 | Identical device, alternate ordering suffix | Identical device, alternate ordering suffix | Pin-for-pin compatible per family datasheet | Same family and footprint, verify per-pin use | Same family and footprint, verify per-pin use | Same footprint class, no manufacturer-published pin-for-pin cross-reference |
Key Differentiators
- Four downstream ports served by one shared transaction translator (vs CY7C65621-56LTXIT)
- Documented pin-for-pin compatibility with the CY7C65640 (vs CY7C65640)
- Industrial temperature coverage on a low-power hub (vs USB2514B-AEZC-TR)
Design Notes
Compliance Information
No RoHS, REACH or conflict-minerals statement for this ordering option was located; confirm the current material compliance declaration with the manufacturer for the exact suffix before release.
