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Infineon Technologies CY7C65640A-LFXC
- Part No.:
- CY7C65640A-LFXC
- Manufacturer:
- Infineon Technologies
- Category:
- Controllers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
CY7C65640A-LFXC.pdf
- Description:
- IC USB HUB CONTROLLER HS 56VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,424
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Product details
Overview
CY7C65640A-LFXC from Cypress Semiconductor is a fixed-function USB 2.0 hub controller with four downstream ports, integrated upstream pull-up and downstream pull-down resistors, four independent transaction translators (one per port), and SPI EEPROM-based configuration of VID/PID/DID. It operates with a 24 MHz external crystal and supports high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) USB signaling in standalone hubs, motherboard hubs, and monitor-integrated hub applications.
For engineers reviewing the CY7C65640A-LFXC datasheet, CY7C65640A-LFXC pinout, CY7C65640A-LFXC application, or CY7C65640A-LFXC equivalent, key selection considerations include per-port TT architecture for full-speed bandwidth isolation, ganged/individual port power switching control via PWR#[n]# outputs, overcurrent detection timing configurability (0–15 ms), and automatic/manual LED indicator modes for downstream port status feedback.
Technical Context
The CY7C65640A-LFXC implements a TetraHub™ architecture with four dedicated transaction translators-enabling independent 12 Mbps full-speed bandwidth per downstream port in multi-TT mode, unlike single-TT hubs that share bandwidth. Its Serial Interface Engine (SIE) handles low-level USB protocol tasks including bit stuffing, checksum validation, and ACK/NAK generation without host intervention.
The Hub Control Block manages enumeration, port power control, suspend/resume coordination, and FIFO management, while the Hub Repeater ensures compliant connectivity between upstream and downstream ports across all USB 2.0 speeds. Configuration is loaded at power-up from an external SPI EEPROM, supporting runtime customization of hub characteristics including removable port flags, overcurrent timers, and port indicator enablement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Standard | Compliant with USB 2.0 specification, supporting high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) operation. |
| Downstream Ports | Four configurable USB 2.0 ports, each with dedicated transaction translator for isolated full-speed bandwidth allocation. |
| Crystal Frequency | 24 MHz external crystal required for internal PLL clock generation; no onboard oscillator. |
| Configuration Interface | SPI serial interface (SPI_CS, SPI_SCK, SPI_SD) for external EEPROM-based setup of VID, PID, DID, and hub descriptors. |
| Power Switching Support | Dedicated PWR#[1–4]# and OVR#[1–4]# pins for external port power switches, enabling ganged or per-port control and overcurrent reporting. |
| LED Indicators | Eight GPIOs (GREEN#[1–4], AMBER#[1–4]) supporting automatic mode (green = enabled, amber = overcurrent) and host-controlled manual mode with blinking capability. |
| Package | 56-pin QFN (8 mm × 8 mm, no leads), RoHS-compliant, with exposed thermal pad. |
Pinout & Package
Package: 56-pin Quad Flat No-Lead (QFN), 8 mm × 8 mm body, 0.5 mm pitch, thermally enhanced with exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pins 3, 7, 11, 15, 19, 23, 27, 31, 35, 39, 43, 47, 51, 55) | Power supply input | 14 dedicated VCC pins for stable core and I/O rail decoupling; requires local 0.1 µF ceramic bypass per group. |
| GND (Pins 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56) | Ground reference | 14 GND pins including thermal pad connection; essential for signal integrity and EMI suppression in USB 2.0 routing. |
| D+, D– (Pin 54, 53) | Upstream differential USB interface | Integrated 1.5 kΩ upstream pull-up resistor on D+ enables full-speed enumeration; series termination resistors built-in. |
| DD+[n], DD–[n] (Pins 1–2, 9–10, 17–18, 25–26) | Downstream differential USB interfaces | Four independent downstream ports with integrated 15 kΩ pull-down resistors and series termination on all D+/D– lines. |
| PWR#[n]#, OVR#[n]# (Pins 41–42, 45–46, 49–50, 53–54) | Port power control & overcurrent reporting | Active-low outputs driving external power switches; OVR#[n]# asserts low on overcurrent event to disable corresponding PWR#[n]#. |
| SPI_CS, SPI_SCK, SPI_SD (Pins 37, 38, 39) | Configuration interface | Three-wire SPI bus for reading VID/PID/DID and hub descriptor parameters from external EEPROM at power-on reset. |
| RESET (Pin 34) | Asynchronous reset input | Active-low signal; resets internal state machines and forces re-read of EEPROM configuration upon deassertion. |
| XIN, XOUT (Pins 30, 29) | Clock input/output | 24 MHz fundamental-mode crystal connection; XOUT drives crystal; no internal oscillator - external crystal mandatory. |
Key Features
| Feature | Design Value |
|---|---|
| Per-port transaction translator | Four independent TTs eliminate full-speed bandwidth contention - each downstream port delivers up to 12 Mbps without sharing. |
| Configurable hub descriptors | VID/PID/DID, number of removable ports, overcurrent timer, and port indicator enablement programmable via external SPI EEPROM. |
| Integrated USB termination | Built-in upstream 1.5 kΩ pull-up and downstream 15 kΩ pull-down resistors plus series termination on all D+/D– lines reduce BOM count and layout complexity. |
| Flexible port power management | Ganged or individual port power switching supported via PWR#[n]# outputs; overcurrent detection timing adjustable from 0–15 ms per port. |
| Automatic LED status feedback | Green LED indicates port enabled; amber LED signals overcurrent - no host software required for basic fault indication. |
Applications
| Standalone USB Hubs | Motherboard-Integrated Hubs |
|---|---|
|
Use Scenario: Desktop or travel USB hub expanding one upstream port into four downstream ports with plug-and-play compatibility. IC Role / Device Role / Timing Role: Fixed-function USB 2.0 hub controller managing enumeration, port power, and speed translation between host and peripherals. Use Value: Eliminates firmware development; per-port TTs ensure simultaneous full-speed device operation (e.g., keyboard + mouse + flash drive) without bandwidth throttling. |
Use Scenario: Embedded USB expansion on industrial PC motherboards requiring reliable, low-latency peripheral connectivity. IC Role / Device Role / Timing Role: High-integration hub controller providing four downstream ports with configurable descriptors and robust overcurrent protection. Use Value: Reduces system-level component count via integrated pull-up/down resistors and termination, lowering PCB layer count and EMI risk. |
| Monitor-Integrated USB Hubs | Docking Stations |
|
Use Scenario: USB hub embedded in LCD monitors to provide peripheral connectivity alongside video input (e.g., HDMI + USB 2.0). IC Role / Device Role / Timing Role: Self-powered hub controller supporting automatic port indicator feedback (green/amber LEDs) for user-facing status visibility. Use Value: Automatic LED mode provides immediate visual fault indication (e.g., amber on overcurrent) without OS driver dependency or UI integration. |
Use Scenario: Multi-interface docking station connecting laptops to Ethernet, audio, storage, and USB peripherals via single upstream link. IC Role / Device Role / Timing Role: High-reliability hub controller with configurable power switching and overcurrent detection for hot-plug-safe peripheral attachment. Use Value: Individual PWR#[n]# and OVR#[n]# pins enable per-port power sequencing and precise fault isolation - critical for mixed-load docking environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB 2.0 hub controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMSC USB2514B | Four-port USB 2.0 hub with single TT architecture; no per-port TT; shares 12 Mbps full-speed bandwidth across all downstream ports. | Lacks independent full-speed bandwidth per port; unsuitable where concurrent full-speed device operation is required. | Select when cost sensitivity outweighs per-port bandwidth needs and firmware-free operation remains essential. |
| Microchip USB5744 | Four-port hub with dual-TT architecture (two TTs shared across four ports); supports up to two concurrent full-speed streams. | Provides partial bandwidth isolation but not full per-port independence; requires different EEPROM configuration structure. | Choose when moderate full-speed concurrency suffices and legacy SMSC-compatible firmware reuse is beneficial. |
Compared with SMSC USB2514B and Microchip USB5744, CY7C65640A-LFXC uniquely delivers four fully independent transaction translators - ensuring deterministic 12 Mbps full-speed throughput per port without arbitration, making it optimal for high-concurrency USB peripheral systems.
Availability
CY7C65640A-LFXC is available at Aetrix Electronics and suitable for standalone USB hubs, motherboard-integrated hubs, and monitor-embedded hub applications requiring stable component supply, long-term lifecycle support, and zero-firmware integration.
Supply support for CY7C65640A-LFXC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Cypress Semiconductor (now part of Infineon Technologies) designs high-performance, mixed-signal ICs for USB, memory, PSoC, and timing applications, with global manufacturing and quality certification to ISO 9001 and AEC-Q200 standards.
CY7C65640A-LFXC belongs to Cypress's TetraHub™ family - engineered specifically for high-reliability, fixed-function USB 2.0 hub applications where firmware-free operation, per-port bandwidth isolation, and robust physical-layer integration are mandatory.
FAQ
Does CY7C65640A-LFXC require external firmware or microcontroller support?
No. CY7C65640A-LFXC is a fixed-function USB 2.0 hub controller with no embedded processor or firmware. All USB protocol handling-including enumeration, transaction translation, and port state management-is implemented in hardware. Configuration is loaded once at power-up from an external SPI EEPROM containing VID/PID/DID and hub descriptor parameters.
What is the function of the PWR#[n]# and OVR#[n]# pins?
PWR#[n]# (active-low) enables external port power switches for downstream ports 1–4; OVR#[n]# (active-low) reports overcurrent events to the hub. When overcurrent is detected, OVR#[n]# asserts low, causing the hub to disable the corresponding PWR#[n]# output and notify the host via the hub status change endpoint.
Can CY7C65640A-LFXC operate without an external crystal?
No. The device requires a 24 MHz fundamental-mode quartz crystal connected between XIN and XOUT pins. There is no internal oscillator or clock multiplier capable of generating the required USB 2.0 timing reference; omission of the crystal prevents USB link initialization and enumeration.
How does the automatic LED indicator mode work?
In automatic mode (default at power-up), GREEN#[n] lights when the port is enabled and operational; AMBER#[n] lights only when an overcurrent condition is detected on that port. Blinking is disabled in this mode. The hub controls LED states autonomously using internal port state machines-no host command or driver interaction is needed.
CY7C65640A-LFXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 56-VFQFN Exposed Pad
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Hub Controller
- Interface:
- USB
- Standards:
- USB 2.0
- Voltage - Supply:
- 3.15V ~ 3.45V
- Current - Supply:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 56-QFN (8x8)
- Grade:
- -
- Qualification:
- -
CY7C65640A-LFXC FAQ
1.How can I place an order for CY7C65640A-LFXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C65640A-LFXC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY7C65640A-LFXC reliable?
The price and inventory of CY7C65640A-LFXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C65640A-LFXC is usually 5 days.
3.What payment methods are accepted for CY7C65640A-LFXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C65640A-LFXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C65640A-LFXC?
CY7C65640A-LFXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C65640A-LFXC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY7C65640A-LFXC?
For technical support, including CY7C65640A-LFXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C65640A-LFXC requirements.
6.How does Aetrix verify that CY7C65640A-LFXC is sourced from the original manufacturer or authorized distributors?
All CY7C65640A-LFXC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY7C65640A-LFXC meets industry standards.
7.What is the process for return or replacement of CY7C65640A-LFXC?
All CY7C65640A-LFXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C65640A-LFXC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY7C65640A-LFXC part is unused and in its original packaging.
Return procedure for CY7C65640A-LFXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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