CY7C65631-56LTXI - 4-Port USB 2.0 Hub Controller | Infineon
MPN: CY7C65631-56LTXI ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.6775 | $8.68 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
CY7C65631-56LTXI Overview
A USB hub controller is an interface IC that manages traffic between one upstream USB host connection and multiple downstream USB ports. Within the hierarchy of USB interface controllers, hub controllers, USB interface ICs, and semiconductors, this device provides port expansion, transaction translation, enumeration support, and power-distribution coordination for USB 2.0 systems.
The controller supports up to four downstream ports and USB 2.0 operation. It can operate in either bus-powered or self-powered modes, allowing the same controller family to address systems with different source-current requirements. Its single-translator architecture is identified by Infineon as suitable for ultralow-power applications, while the verified listing describes the family as a low-power USB 2.0 hub controller.
The verified product material also identifies an automotive and industrial-grade option rated to 85 °C. This qualification statement applies to the described family or option, but no specific AEC-Q100 certification was supplied, so automotive qualification remains unconfirmed. USB-IF certification is identified by the verified technical listing as TID 30000009, and Windows Hardware Quality Lab compliance is likewise stated in that listing.
Typical uses include compact USB 2.0 hubs, powered desktop peripherals, industrial data-acquisition equipment, automotive infotainment interfaces, and embedded systems that need more than one USB peripheral connection. The controller must be paired with suitable USB connectors, protection components, power switches, firmware, and a host platform that supports its hub implementation.
Designers should preserve the package footprint, exposed-pad thermal path, USB data-routing geometry, and decoupling arrangement specified by the manufacturer datasheet. USB differential pairs require controlled impedance and short, symmetric routing; incorrect return paths or inadequate power planning can cause enumeration failures even when the controller itself operates correctly.
This page consolidates verified manufacturer and distributor information, package identification, commercial availability, technical feature context, and engineering guidance. It also identifies where additional datasheet values are required rather than estimating unverified electrical or pin-level details.
Drop-in alternatives for CY7C65631-56LTXI — 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 CY7C65631-56LTXI (same form factor and footprint) — differing in Package, Product Type, USB Specification, Package Type, Power Mode.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CY7C65631-56LTXCT
✅ Drop-In📋 Reference alternative (not in catalog)
CY7C65630-56LTXI
✅ Drop-In📋 Reference alternative (not in catalog)
CY7C60333-LTXC
✅ Drop-In📋 Reference alternative (not in catalog)
CY7C60413-16LKXCT
✅ Drop-In📋 Reference alternative (not in catalog)
USB2513B-AEZC
✅ Drop-In✓ In Stock
$2.78 / Unit
View Datasheet →CY7C65631-56LTXI Specifications
| Product Type | USB 2.0 hub controller |
| Product Family | EZ-USB HX2LP |
| USB Specification Support | USB 2.0 |
| Maximum Downstream Ports | 4 ports |
| Transaction Translator Count | 1 single transaction translator |
| Power Modes | Bus-powered and self-powered |
| Package | 56-pin QFN, 8 mm x 8 mm |
| Package Type | QFN |
| Surface-Mount Package | 56-pin surface-mount QFN |
| Temperature Grade | I-grade; verified listing states an automotive and industrial option to 85 °C |
| USB-IF Certification | Certified, TID 30000009 |
| Windows Hardware Quality Lab | Compliant |
CY7C65631-56LTXI 56-pin surface-mount qfn Pin Configuration Guide
Pin configuration for CY7C65631-56LTXI (56-pin surface-mount qfn 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 CY7C65631-56LTXI.
Refer to the datasheet for full pin configuration.
Typical Applications
CY7C65631-56LTXI is suitable for 6 applications: Compact USB 2.0 Desktop Hub, Industrial Data-Acquisition Equipment, Automotive Infotainment USB Interface, USB-to-Serial Service Adapter, Embedded USB Test and Measurement Hub, Powered USB Peripheral Expansion.
Compact USB 2.0 Desktop Hub
The CY7C65631-56LTXI fits compact desktop USB hubs because the verified product information identifies USB 2.0 operation and support for up to four downstream ports. A hub implementation can place the controller between an upstream host connection and several peripheral ports, reducing the need for multiple host USB receptacles in a small enclosure. The 56-pin QFN package is suitable for multilayer PCB assembly, but the designer must follow the official exposed-pad and decoupling layout. Firmware, USB connectors, power switches, and system enumeration must be validated together before production.
Recommended
Industrial Data-Acquisition Equipment
The CY7C65631-56LTXI can be used in industrial measurement equipment that needs several USB peripherals, such as an interface controller, data logger, or service port. The verified I-grade identification and the listing's automotive and industrial option to 85 °C make the family relevant to equipment operating beyond ordinary consumer environments, although exact temperature and qualification requirements must be checked for this MPN. The four-port capability provides expansion without changing the basic hub architecture. Proper USB trace impedance, grounding, and power budgeting are critical when connecting converters, sensors, and external cables.
Recommended
Automotive Infotainment USB Interface
The EZ-USB HX2LP family description identifies an automotive and industrial-grade option to 85 °C, making the CY7C65631-56LTXI relevant to automotive infotainment and cabin USB connectivity designs. The controller can support up to four downstream USB 2.0 ports while allowing bus-powered or self-powered operation, depending on the vehicle electrical design. This use requires a complete qualification review: the supplied data does not confirm AEC-Q100 status for the exact MPN, so it cannot be treated as automatically automotive-qualified. Vehicle transient protection, ground isolation, connector retention, and EMC testing must be included in the design review.
Recommended
USB-to-Serial Service Adapter
The CY7C65631-56LTXI can support a multiport USB service adapter when a host computer must connect to multiple embedded targets over USB. Its verified support for four downstream ports makes it suitable for configurations containing several programming, debug, or configuration interfaces. The controller should be placed on a controlled USB-routing layer, with each differential pair routed as a matched pair and connector transient protection located near the external pins. The actual host-driver and enumeration behavior must be tested with the intended operating systems and target devices because the verified data does not specify supported operating systems or driver requirements.
Recommended
Embedded USB Test and Measurement Hub
The CY7C65631-56LTXI is suitable for a USB hub used in an embedded test system that combines several peripheral interfaces, such as a storage adapter, communication interface, and configuration port. The verified USB 2.0 and four-downstream-port capabilities provide a clear expansion path, while bus-powered and self-powered modes allow the hub architecture to adapt to different test fixtures. USB signal integrity and power integrity should be validated at the connector, protection-device, and controller locations. The supplied data does not define cable length, current limits, or connector insertion lifetime, so these values must come from the full manufacturer documentation.
Recommended
Powered USB Peripheral Expansion
The CY7C65631-56LTXI can be used in a powered USB peripheral enclosure when several downstream devices need more reliable current delivery than a host port alone can provide. The verified product material explicitly supports bus-powered and self-powered modes, allowing the implementation to select the appropriate power architecture for the enclosure. In a self-powered design, include the required protection, switching, and supply components around the hub controller, and do not infer current limits from the four-port feature alone. The verified data does not provide the controller's maximum downstream current, so the complete power budget must be established from the manufacturer datasheet and USB design requirements.
Recommended
Recommended Products Summary
Engineering reference data for CY7C65631-56LTXI — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY7C65631-56LTXCT | CY7C65630-56LTXI | CY7C60333-LTXC | CY7C60413-16LKXCT | USB2513B-AEZC |
|---|---|---|---|---|---|---|
| Package | 56-QFN (8x8 mm) | 56-QFN (8x8 mm) - same package claimed for comparison | 56-QFN (8x8 mm) - same package claimed for comparison | 56-QFN (8x8 mm) - comparison package unverified | 56-QFN (8x8 mm) - comparison package unverified | 56-QFN (8x8 mm) - compatibility unverified |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Microchip Technology |
| Product Type | USB 2.0 hub controller | USB hub controller comparison candidate | USB hub controller comparison candidate | USB interface IC comparison candidate | USB interface IC comparison candidate | USB hub controller comparison candidate |
Key Differentiators
- Four downstream USB ports in the EZ-USB HX2LP family (vs CY7C65630-56LTXI)
- Single transaction translator architecture (vs USB2513B-AEZC)
- Bus-powered and self-powered operation (vs CY7C60413-16LKXCT)
- Verified USB-IF identification (vs CY7C60333-LTXC)
Design Notes
Route each USB differential pair as a controlled-impedance, tightly coupled pair with a continuous reference plane and minimal stubs. Keep the controller-to-connector path short where possible, maintain symmetry between D+ and D-, and place ESD or other connector protection close to the external pins. The verified data identifies USB 2.0 operation but does not provide the required impedance value, so obtain that value from the manufacturer hardware design guidance.
Design the downstream-port power path around the required operating mode. The verified product material confirms bus-powered and self-powered support, but it does not provide the maximum downstream current in the supplied data. Establish the current budget, protection thresholds, switching behavior, and capacitor sizing from the complete datasheet. Do not infer that four ports automatically means four ports can operate at the same maximum current.
The device uses a 56-pin QFN package, so thermal performance depends heavily on the exposed pad, copper area, via pattern, and surrounding airflow. Use the manufacturer land pattern and thermal guidance rather than relying on a generic QFN footprint. Check the controller's power dissipation against the actual USB operating mode and local ambient temperature, and preserve the thermal path beneath the package during layout.
Do not treat a related MPN as a drop-in replacement without checking the complete pin table, exposed-pad connection, USB signal assignments, operating voltage, current limits, firmware requirements, and package drawing. The verified search results identify several related controllers but do not quantify those differences. Confirm the exact orderable part and manufacturer documentation before releasing a PCB or updating a BOM.
Compliance Information
The verified listing mentions an automotive and industrial-grade option to 85 °C, but the supplied data does not confirm AEC-Q100 qualification for this exact MPN. USB-IF certification is identified as TID 30000009, and Windows Hardware Quality Lab compliance is stated in the verified technical listing.
