CY7C65640A-LFXCT - USB 2.0 4-Port Hub Controller | Infineon
MPN: CY7C65640A-LFXCT ✗ End of LifeCY7C65640A-LFXCT Overview
A USB hub controller is an interface IC within the USB interface-controller family of semiconductor devices. It manages traffic between one upstream USB connection and multiple downstream ports, providing the electrical and protocol foundation for a USB hub. The CY7C65640A-LFXCT therefore belongs to the broader USB interface, connectivity IC, and semiconductor product hierarchy rather than acting as a general-purpose processor or memory device.
The verified product information identifies USB 2.0 operation, four-port hub operation, a 3.3 V supply, and a 56-QFN 8 mm by 8 mm package. Its integrated hub-controller role allows a system designer to add multiple USB connections without implementing every USB data path with discrete logic. The surface-mount package also supports compact PCB layouts, although thermal, routing, and exposed-pad requirements must be confirmed from the manufacturer datasheet before layout release.
This part is listed as obsolete in the supplied comparison data. Engineers should therefore treat it as a legacy component intended primarily for maintaining or reproducing an existing design rather than for a new platform with long-term procurement requirements. Its four-port USB hub architecture may remain useful in legacy peripherals, embedded equipment, and industrial systems that require a dedicated USB 2.0 hub controller instead of a general-purpose companion controller.
Typical design roles include USB port expansion in embedded appliances, multi-interface industrial equipment, compact peripheral systems, and communication equipment that must expose several USB connections. A USB-to-serial bridge such as CP2102N can sit downstream when an external UART or programming interface is required. The actual host-driver, enumerator, power-supply, and port-protection implementations must be validated against the original system design and the manufacturer documentation.
The primary design concern is ensuring that the upstream and downstream USB routing, supply voltage, decoupling, and thermal layout reproduce the original implementation. Because the available verified data does not specify the complete pinout, exposed-pad connection, operating temperature, USB data rates, and electrical timing characteristics, those values should be obtained from the manufacturer datasheet before making a drop-in decision.
This page combines the verified distributor identification, lifecycle observation, same-package cross-reference result, commercial source links, and practical replacement guidance. It is intended to help engineers identify the CY7C65640A-LFXCT, assess whether a listed alternative is suitable, and locate the source data needed for a controlled legacy-design review.
Drop-in alternatives for CY7C65640A-LFXCT — 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 CY7C65640A-LFXCT (same form factor and footprint) — differing in Supply Voltage, Device Type, Number of Pins, Operating Temperature, Package Dimensions.
CY7C65640A-LTXCT
✅ Drop-InContact for price
View Datasheet →CY7C65640A-LFXCT Specifications
| Product Type | USB 2.0 four-port hub controller |
| USB Protocol | USB 2.0 |
| Number of USB Ports | 4 ports |
| Supply Voltage | 3.3 V |
| Package Type | 56-QFN |
| Package Dimensions | 8 mm x 8 mm |
| Pin Count | 56 pins |
| Mounting Type | Surface mount |
| Shipping Package | Tape & reel |
| Product Status | Obsolete |
| Manufacturer | Infineon Technologies |
| Product Category | USB interface controller |
CY7C65640A-LFXCT tape & reel Pin Configuration Guide
Pin configuration for CY7C65640A-LFXCT (tape & reel 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 CY7C65640A-LFXCT.
Refer to the datasheet for full pin configuration.
Typical Applications
CY7C65640A-LFXCT is suitable for 6 applications: Legacy Embedded USB Port Expansion, Industrial USB Hub Interface, Communication Equipment USB Connectivity, USB-to-Serial Adapter Assembly, Peripheral Test and Service Interface, Multi-Connector Consumer Peripheral.
Legacy Embedded USB Port Expansion
The CY7C65640A-LFXCT fits a legacy embedded board that needs to expand one host USB connection into four hub ports without using a general-purpose processor for hub management. Its verified USB 2.0 operation, four-port hub function, 3.3 V supply, and compact 56-QFN package match the scale of legacy appliances and peripheral controllers. Because the device is obsolete, it is most appropriate when an existing PCB, host stack, and enclosure already depend on its behavior. Designers should reproduce the original USB routing, power-management implementation, and decoupling arrangement exactly.
Recommended
Industrial USB Hub Interface
The CY7C65640A-LFXCT can support a legacy industrial controller requiring several USB connections on a constrained circuit board. Its four-port USB 2.0 hub architecture consolidates downstream devices behind one upstream interface, while the 56-QFN 8 mm by 8 mm package preserves routing space. Industrial use also makes exact operating-temperature qualification important because that range is not present in the supplied excerpts. The preferred approach is to retain this controller only in an established platform and validate the complete thermal, power-supply, and USB signal path against the manufacturer documentation.
Recommended
Communication Equipment USB Connectivity
The CY7C65640A-LFXCT is applicable to a legacy communication device that must expose multiple USB service, configuration, or peripheral connections. The verified four-port USB 2.0 hub capability can reduce connector wiring complexity compared with implementing independent host paths, while the 3.3 V supply aligns with contemporary embedded interfaces. Its obsolete lifecycle status means it should not be selected for an unrestricted new platform unless a long-term supply plan exists. USB impedance, branch routing, protection devices, and connector overcurrent behavior remain design-level verification items.
Recommended
USB-to-Serial Adapter Assembly
The CY7C65640A-LFXCT can sit at the hub layer of a multi-interface adapter assembly that combines several USB peripherals into one upstream connection. Its four hub ports provide room for programming, configuration, and peripheral links within a legacy product architecture. A bridge such as CP2102N can then provide USB-to-UART conversion downstream, depending on the system’s partition of functions. Because the controller is obsolete and its detailed pinout is not supplied here, this application requires an existing reference design or a controlled engineering adaptation rather than a speculative new layout.
Recommended
Peripheral Test and Service Interface
The CY7C65640A-LFXCT can serve a legacy peripheral test fixture or service panel that connects multiple USB devices to a host controller. Its four-port USB 2.0 configuration allows separate service, diagnostic, and peripheral connections while using the hub controller as the central routing device. The compact 56-QFN package is helpful in densely populated test electronics, but fixture designers must account for connector protection, branch impedance, and cable or device hot-plug behavior. Given the obsolete status, prefer this part where a proven board already uses it and a supported controller is unsuitable without redesign.
Recommended
Multi-Connector Consumer Peripheral
The CY7C65640A-LFXCT fits an existing consumer-peripheral design that needs four USB hub connections from a compact controller. Its USB 2.0 four-port function and 3.3 V operation match the requirements of many legacy accessories, docks, and networked peripherals, while the 56-QFN footprint limits board area. A new consumer product should generally favor an active lifecycle part because long-term availability and qualification matter. If the existing design depends on this controller, preserve its exact pin mapping, supply network, USB data routing, and original protection scheme rather than assuming a generic 56-QFN controller is interchangeable.
Recommended
Recommended Products Summary
Engineering reference data for CY7C65640A-LFXCT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY7C65640A-LTXCT |
|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies |
| Package | 56-QFN (8x8 mm) | 56-pin surface-mount package |
| Product Type | USB 2.0 four-port hub controller | High-speed USB hub controller |
| USB Protocol | USB 2.0 | USB |
| Pin Count | 56 pins | 56 pins |
| Lifecycle Status | Obsolete | Obsolete |
| Shipping Package | Tape & Reel | Tape & Reel |
Key Differentiators
- Verified four-port USB 2.0 hub function (vs CY7C65640A-LTXCT)
- Verified 3.3 V operating supply (vs CY7C65640A-LTXCT)
- Identified 8 mm by 8 mm QFN dimensions (vs CY7C65640A-LTXCT)
Design Notes
Do not treat every 56-QFN USB controller as a drop-in alternative. The CY7C65640A-LTXCT is the only candidate supported by the supplied cross-reference excerpts as a same-family, 56-pin review candidate. Before substitution, compare every pin name, supply input, ground connection, exposed-pad connection, USB data signal, configuration input, and test point against the original device. The verified excerpts do not provide a complete pinout or guarantee electrical identity.
Reproduce the original 3.3 V supply network and verify the hub port current budget before layout release. The supplied data confirms a 3.3 V operating voltage but does not state regulator tolerances, quiescent current, USB port current, or the exposed-pad connection. Confirm those values in the manufacturer datasheet and account for downstream-device power demand, inrush, and protection-device losses. The obsolete lifecycle status makes undocumented reuse of an old reference design particularly risky.
Use the manufacturer reference layout rather than a generic 56-QFN footprint. USB differential routing requires controlled impedance, short matched branches, continuous reference planes, and careful treatment of connector and protection-device returns. Because the exact pin map and exposed-pad connection are unavailable in the supplied data, do not release a replacement layout from package dimensions alone. Validate the complete USB topology, including upstream and downstream routing, against the applicable USB implementation guidance.
Plan for lifecycle risk before committing this obsolete controller to new production. Distributor availability may be limited and can change without notice, so obtain written stock confirmation and a purchasing plan. A design using the target can be maintained with documented equivalent-part testing, but a future redesign should consider a supported controller and assess PCB, firmware, connector, protection, and USB compliance changes rather than assuming that functional equivalence means drop-in equivalence.
Compliance Information
The supplied excerpts include a comparison-tool statement mentioning RoHS and REACH as compared attributes, but they do not provide the actual compliance result for this MPN. Every compliance field therefore remains unknown rather than assumed.