CY7C65620-56LFXAT - 2-Port USB 2.0 Hub | Infineon
MPN: CY7C65620-56LFXAT ✓ ActiveCY7C65620-56LFXAT Overview
A USB hub controller is an interface IC that manages communication between one upstream USB host and multiple downstream USB devices. The CY7C65620 belongs to the EZ-USB HX2LP low-power USB 2.0 hub-controller family and uses a single-Transaction Translator architecture. This hierarchy connects the device to USB interface controllers, USB 2.0 peripheral controllers, interface ICs, and ultimately semiconductor solutions for USB connectivity.
The verified device information identifies integrated upstream and downstream termination resistors, integrated port-status indicator control, a 24 MHz external crystal connection, and an integrated phase-locked loop. Configuration can use an external SPI EEPROM for vendor ID, product ID, and other descriptors. The -56LFXAT ordering code also identifies the 56-pin QFN package, the A-grade variant, and the temperature and shipping-option suffix, although the exact numeric temperature limits were not present in the supplied source data.
Typical applications include two-port USB 2.0 hubs, embedded host adapters, industrial data-acquisition equipment, USB-to-serial bridge assemblies, peripheral docking stations, and compact test systems. The 480 Mbps high-speed capability allows the controller to work with high-speed storage and communications devices while remaining compatible with full-speed USB peripherals.
Designers should follow the manufacturer reference circuit for crystal loading, USB differential routing, supply decoupling, and termination requirements. USB signal integrity depends on controlled impedance, short traces, continuous reference planes, and minimizing stubs. The external EEPROM option also requires careful logic-level and pull-up review if configurable descriptors are used.
This product data consolidates the verified price and stock listing, controller capabilities, package identity, ordering variants, and application-oriented design guidance. It also distinguishes genuine same-family drop-in options from broader USB-hub-controller alternatives that do not share the 56-QFN footprint.
Drop-in alternatives for CY7C65620-56LFXAT — 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 CY7C65620-56LFXAT (same form factor and footprint) — differing in Operating Supply Voltage.
CY7C65620-56LTXC
✅ Drop-InContact for price
View Datasheet →CY7C65620-56LTXI
✅ Drop-In📋 Reference alternative (not in catalog)
CY7C65620-56LFXC
✅ Drop-InContact for price
View Datasheet →CY7C65620-56LFXI
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY7C65620-56LTXCT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY7C65620-56LFXAT Specifications
| Product Type | USB 2.0 hub controller |
| Number of Downstream Ports | 2 ports |
| USB High-Speed Data Rate | 480 Mbps |
| Operating Supply Voltage | 3.45 V |
| Architecture | Single-Transaction Translator |
| External Clock | 24 MHz crystal |
| Clocking | Integrated phase-locked loop |
| Upstream Termination | Integrated termination resistor |
| Downstream Termination | Integrated termination resistors |
| Port Status Indicator Control | Integrated |
| Configuration Interface | External SPI EEPROM |
| Configurable Descriptors | Vendor ID and product ID |
| Package | 56-QFN |
| Mounting Type | Surface mount |
| Temperature Grade | A grade |
| Product Family | EZ-USB HX2LP |
CY7C65620-56LFXAT 56-qfn Pin Configuration Guide
Pin configuration for CY7C65620-56LFXAT (56-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 CY7C65620-56LFXAT.
Refer to the datasheet for full pin configuration.
Typical Applications
CY7C65620-56LFXAT is suitable for 6 applications: Two-Port USB 2.0 Hub, Industrial Data-Acquisition Hub, USB-to-Serial Bridge Assembly, Embedded USB Expansion Adapter, USB Test and Measurement Fixture, Compact Docking Station.
Two-Port USB 2.0 Hub
The CY7C65620-56LFXAT is designed as the central controller for a two-port USB 2.0 hub. Its single-Transaction Translator architecture manages one upstream host-facing port and two downstream ports, while the verified 480 Mbps capability supports high-speed peripherals such as storage devices. Integrated upstream and downstream termination resistors can reduce the external resistor count, although the final board must still follow the manufacturer's reference layout. The 3.45 V operating supply and 56-QFN package suit compact powered hubs, and integrated port-status indicator control simplifies connection-state LED implementation. Designers should confirm the exact pinout and reference circuit because the supplied data identifies the package and functions but does not provide the complete numbered pin table.
Recommended
Industrial Data-Acquisition Hub
Industrial acquisition equipment often combines a computer or embedded controller with USB instruments, sensors, and service interfaces. The CY7C65620-56LFXAT provides two downstream USB 2.0 ports with full-speed and 480 Mbps high-speed operation, allowing high-bandwidth storage to coexist with lower-speed peripherals. Its integrated termination resistors reduce board complexity, while the 56-QFN package preserves routing flexibility in compact instrumentation. The main engineering condition is grade validation: the verified source identifies an A-grade suffix but does not state the numeric temperature range, so industrial temperature suitability must be confirmed in the complete ordering information before deployment.
Recommended
USB-to-Serial Bridge Assembly
A multi-interface bridge can use the CY7C65620-56LFXAT to manage USB connectivity for serial adapters, debug interfaces, and service ports. Its two-port topology avoids requiring separate hub silicon when only two USB devices are needed. The controller's 480 Mbps high-speed mode permits faster storage or diagnostic devices to share the hub with a full-speed serial adapter, although enumeration and bandwidth allocation remain under the host controller's control. Integrated port-status indicator control supports practical connection LEDs. The 56-QFN footprint requires careful USB differential routing and thermal review, and designers should account for the external 24 MHz crystal and optional SPI EEPROM shown by the verified family information.
Recommended
Embedded USB Expansion Adapter
The CY7C65620-56LFXAT is appropriate for embedded systems that expose two USB ports through a small controller board or system-level mezzanine. Its 56-QFN package and integrated USB terminations support compact layouts, while full-speed and high-speed operation maintain compatibility with a broad range of USB devices. An optional external SPI EEPROM can store configurable vendor and product identifiers, allowing the adapter to present an appropriate device identity to a host. Designers should preserve USB impedance control, minimize connector-to-controller trace length, provide the required 3.45 V operating rail, and follow the manufacturer reference circuit for crystal loading and exposed-pad grounding.
Recommended
USB Test and Measurement Fixture
A bench fixture or automated test system can use the CY7C65620-56LFXAT to connect a host computer to two USB-controlled instruments. The controller supports both full-speed and 480 Mbps high-speed devices, while the single-Transaction Translator topology keeps the hub implementation compact. Integrated termination resistors and indicator control reduce the number of supporting components and status LEDs in a dense fixture. For reliable measurements, the designer must route D+ and D- as controlled-impedance differential pairs, maintain continuous ground references, and separate noisy switching supplies from the controller. The 24 MHz crystal and optional SPI EEPROM should be implemented exactly as shown in the manufacturer reference design.
Recommended
Compact Docking Station
A compact docking station can use the CY7C65620-56LFXAT to add two USB connections to an embedded computer or industrial controller. The two-port single-Transaction Translator arrangement provides enough connectivity for a keyboard, mouse, mass-storage device, or service interface without a larger multi-port hub controller. Its 480 Mbps high-speed capability supports external storage, while full-speed compatibility covers legacy peripherals. The 56-QFN package helps conserve board area, and integrated terminations simplify the USB analog network. Power budgeting remains important because the controller and attached bus-powered devices must share a supply that remains valid under the worst-case enumerated load.
Recommended Products Summary
Engineering reference data for CY7C65620-56LFXAT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY7C65620-56LTXC | CY7C65620-56LTXI | CY7C65620-56LFXC | CY7C65620-56LFXI | CY7C65620-56LTXCT |
|---|---|---|---|---|---|---|
| Package | 56-QFN | 56-QFN | 56-QFN | 56-QFN | 56-QFN | 56-QFN |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Product Type | USB 2.0 hub controller | USB 2.0 hub controller | USB 2.0 hub controller | USB 2.0 hub controller | USB 2.0 hub controller | USB 2.0 hub controller |
| Downstream Ports | 2 ports | 2 ports | 2 ports | 2 ports | 2 ports | 2 ports |
| Operating Supply Voltage | 3.45 V | 3.45 V | 3.45 V | 3.45 V | 3.45 V | 3.45 V |
| USB High-Speed Data Rate | 480 Mbps | 480 Mbps | 480 Mbps | 480 Mbps | 480 Mbps | 480 Mbps |
| Architecture | Single-Transaction Translator | Single-Transaction Translator | Single-Transaction Translator | Single-Transaction Translator | Single-Transaction Translator | Single-Transaction Translator |
| External Clock | 24 MHz crystal | 24 MHz crystal | 24 MHz crystal | 24 MHz crystal | 24 MHz crystal | 24 MHz crystal |
| Configuration Method | External SPI EEPROM | External SPI EEPROM | External SPI EEPROM | External SPI EEPROM | External SPI EEPROM | External SPI EEPROM |
| Grade and Ordering Suffix | A grade, T suffix | C grade, C suffix | I suffix | C grade, C suffix | I suffix | C grade, T suffix |
Key Differentiators
- Dedicated two-port USB 2.0 hub architecture (vs CY7C65630-56LFXAT)
- Integrated USB termination network (vs CY7C65620-56LTXC)
- Compact 56-QFN implementation with high-speed USB (vs CY7C65620-56LTXI)
- Configurable USB descriptors through SPI EEPROM (vs CY7C65620-56LFXC)
Design Notes
Route each USB D+ and D- pair as a short, continuous 90-ohm differential pair over an uninterrupted ground plane. Avoid vias where possible, match pair length within the impedance target, and keep stubs away from the controller and connectors. The verified source confirms 480 Mbps high-speed operation, so connector launches, protection devices, and test points must be included in the USB channel-loss budget.
Place the 24 MHz crystal and its load network immediately beside the controller clock pins, with a short ground return and no USB traces beneath the oscillator area. Follow the manufacturer reference schematic for the exact crystal type, load capacitance, and grounding arrangement. The verified information confirms an external 24 MHz crystal and integrated PLL, but it does not provide the complete reference values.
Provide a stable 3.45 V operating rail with local high-frequency bypass and adequate bulk capacitance near the controller. Although the verified source identifies integrated USB termination resistors, it does not specify the complete power network or decoupling values. Use the manufacturer reference design for capacitor selection and verify the exposed-pad connection and copper area for thermal and current handling.
Do not treat a related CY7C656xx or USB-hub-controller MPN as interchangeable merely because it has a similar QFN package. The supplied comparison information states that the CY7C65630 differs in important parameters and circuit structure. For a CY7C65620 ordering variant, verify grade, temperature range, lead-free status, shipment form, and all numbered pin functions in the manufacturer ordering table and datasheet.
Compliance Information
The supplied verified snippets identify the device and package but do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the ordering code.