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Infineon Technologies CY7C65640A-LFXCT
- Part No.:
- CY7C65640A-LFXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Controllers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
CY7C65640A-LFXCT.pdf
- Description:
- IC USB HUB CONTROLLER HS 56VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,825
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Product details
Overview
CY7C65640A-LFXCT from Cypress Semiconductor is a USB 2.0 high-speed hub controller with four downstream ports, integrated transaction translators (one per port), 24 MHz crystal interface, and SPI EEPROM-based configuration for VID/PID/DID. It operates as a self-powered fixed-function hub in standalone, motherboard, or monitor applications without firmware development.
For engineers reviewing the CY7C65640A-LFXCT datasheet, CY7C65640A-LFXCT pinout, CY7C65640A-LFXCT application, or CY7C65640A-LFXCT equivalent, key selection criteria include per-port TT support, ganged/individual power switching control, overcurrent timer configurability (0–15 ms), and automatic/manual LED indicator modes for port status feedback.
Technical Context
The CY7C65640A-LFXCT implements a TetraHub architecture with four independent transaction translators-enabling full 12 Mbps bandwidth per full-/low-speed downstream port in Multiple TT mode. Its Serial Interface Engine handles low-level USB protocol tasks including bit stuffing, checksum checking, and ACK/NAK generation independently of the Hub Control Block.
The Hub Control Block manages enumeration, FIFO buffering, suspend/resume coordination, DATA toggle verification, and port power/overcurrent control. The Hub Repeater supports high-speed, full-speed, and low-speed connectivity between upstream and downstream ports, with chirp-based high-speed negotiation and SE0-driven reset signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Standard | Compliant with USB 2.0 specification; supports 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 independent full-/low-speed bandwidth allocation. |
| Upstream Interface | Single USB 2.0 upstream port with integrated 1.5 kΩ pull-up resistor and series termination on D+/D−. |
| Configuration Method | External SPI EEPROM interface (SPI_CS, SPI_SCK, SPI_SD) for VID, PID, DID, and hub descriptor parameters. |
| Crystal Input | 24 MHz external crystal (XIN/XOUT) for precise USB timing compliance and jitter control. |
| Power Switching | Four PWR#[n]# outputs support individual or ganged external port power switches; OVR#[n]# signals report overcurrent events. |
| Overcurrent Timer | Configurable per-port overcurrent detection window from 0 ms to 15 ms via EEPROM. |
Pinout & Package
Package: 56-pin QFN (8 mm × 8 mm), no leads, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D+, D− | Upstream differential USB 2.0 data pair | Connects to host controller; includes integrated series termination resistors and pull-up (D+) for enumeration. |
| DD+[n], DD−[n] (n=1–4) | Downstream differential USB 2.0 data pairs | Each pair drives one downstream port; includes integrated 15 kΩ pull-down resistors and series termination. |
| PWR#[n]#, OVR#[n]# (n=1–4) | Port power enable / overcurrent indication | Directly interface with external power switch ICs; PWR#[n]# enables VBUS to port, OVR#[n]# asserts on overcurrent fault. |
| GREEN#[n], AMBER#[n] (n=1–4) | LED control outputs | Drive dual-color status indicators per port; support automatic (state-driven) or manual (host-controlled) blinking/color modes. |
| SPI_CS, SPI_SCK, SPI_SD | SPI serial interface | Reads configuration data (VID/PID/DID, hub descriptors, timers) from external EEPROM at power-on. |
| XIN, XOUT | Crystal oscillator terminals | Drive 24 MHz fundamental-mode crystal for USB timing accuracy and EMI control. |
| BUSPOWER | Upstream VBUS sense input | Detects presence of upstream VBUS to determine self- vs bus-powered mode and initiate pull-up resistor activation. |
Key Features
| Feature | Design Value |
|---|---|
| Per-port Transaction Translator | Enables independent 12 Mbps full-speed bandwidth per downstream port in Multiple TT mode-no shared bottleneck across low-/full-speed devices. |
| Configurable Overcurrent Timing | EEPROM-programmable overcurrent detection window (0–15 ms) per port allows tuning for specific load profiles and capacitor inrush behavior. |
| Integrated USB Termination & Biasing | On-die 1.5 kΩ upstream pull-up and 15 kΩ downstream pull-down resistors eliminate six external components per port and reduce BOM cost. |
| Dual-Mode LED Indicators | Hardware-automated (green = enabled, amber = overcurrent) and host-software-controllable LED states provide real-time port diagnostics without firmware overhead. |
| No-Firmware Operation | Fixed-function hub logic eliminates need for custom firmware development, reducing time-to-market and qualification effort for OEM hub designs. |
Applications
| Standalone USB Hubs | Motherboard Integrated Hubs |
|---|---|
Use Scenario: Desktop or portable 4-port USB hubs connecting keyboards, mice, flash drives, and printers to a single host port. IC Role / Device Role / Timing Role: Central USB 2.0 hub controller managing upstream host communication and downstream device arbitration with per-port TT isolation. Use Value: Eliminates bandwidth contention between full-speed peripherals by assigning dedicated TT resources-ensuring consistent 12 Mbps throughput per device. | Use Scenario: Embedded USB expansion on industrial PC motherboards requiring reliable peripheral connectivity without firmware dependencies. IC Role / Device Role / Timing Role: Fixed-function hub controller providing plug-and-play USB port replication with hardware-managed power sequencing and overcurrent protection. Use Value: Reduces system integration risk by removing firmware development, validation, and USB compliance testing burden from motherboard design teams. |
| Monitor-Integrated USB Hubs | Docking Stations |
Use Scenario: USB ports built into LCD monitors for connecting peripherals while sharing video and power over a single cable. IC Role / Device Role / Timing Role: Self-powered hub controller interfacing with monitor's internal power rail and supporting hot-plug detection with LED status feedback. Use Value: Enables compact monitor-integrated hub designs using only one external crystal and SPI EEPROM-minimizing PCB area and component count. | Use Scenario: Laptop docking stations aggregating USB, Ethernet, and display interfaces with robust port protection and user-visible status indicators. IC Role / Device Role / Timing Role: High-reliability hub controller delivering per-port power switching, overcurrent reporting, and dual-color LED feedback for end-user troubleshooting. Use Value: Provides immediate visual identification of port faults (amber LED) or active connections (green LED), reducing helpdesk calls and field service visits. |
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 |
|---|---|---|---|
| USB2514B-AEZG | Four-port USB 2.0 hub with integrated 1.5k/15k resistors and EEPROM configuration; lacks per-port TT-uses single TT shared across all full-/low-speed ports. | Lower cost for basic hubs where full-speed device concurrency is not required; unsuitable for mixed-speed environments demanding per-port bandwidth guarantees. | Select when BOM simplicity and cost outweigh per-port bandwidth needs; verify host OS supports single-TT mode for full-speed device coexistence. |
| UPD720114GA-YF-BAC-A | Four-port USB 2.0 hub with single TT and integrated voltage regulators; supports battery-powered operation; no LED driver outputs. | Targeted at portable battery-operated hubs; requires external LED drivers and lacks hardware automatic LED state mapping. | Choose for mobile applications needing integrated LDOs and low quiescent current; accept added complexity for LED control and reduced diagnostic capability. |
Compared with USB2514B-AEZG and UPD720114GA-YF-BAC-A, the CY7C65640A-LFXCT uniquely delivers per-port transaction translators, integrated LED drivers with automatic mode, and configurable overcurrent timing-making it optimal for high-reliability, mixed-speed hub systems requiring deterministic full-speed performance and user-facing diagnostics.
Availability
CY7C65640A-LFXCT is available at Aetrix Electronics and suitable for standalone USB hubs, motherboard-integrated hubs, and monitor hub applications requiring stable component supply, long-term lifecycle support, and USB-IF compliance assurance.
Supply support for CY7C65640A-LFXCT 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) is a U.S.-based semiconductor company specializing in programmable system-on-chip (PSoC), USB, memory, and analog solutions for industrial, automotive, and consumer markets.
The CY7C65640A belongs to Cypress's TetraHub™ family-designed specifically for high-performance, fixed-function USB 2.0 hub applications where zero-firmware operation, per-port bandwidth isolation, and hardware-assisted diagnostics are critical.
FAQ
Is external firmware required to operate the CY7C65640A-LFXCT?
No firmware is required. The CY7C65640A-LFXCT is a fixed-function USB 2.0 hub controller that initializes and operates autonomously after reading configuration data (VID/PID/DID, hub descriptors) from an external SPI EEPROM. All USB protocol handling-including enumeration, transaction translation, and port power control-is implemented in hardware.
What is the function of the BUSPOWER pin?
The BUSPOWER pin senses upstream VBUS presence to determine self-powered versus bus-powered operation. When HIGH, it enables the internal 1.5 kΩ upstream D+ pull-up resistor to signal connection to the host. This pin also influences power-on initialization sequence and hub descriptor reporting (e.g., bHubContrCurrent value).
Can the CY7C65640A-LFXCT support both Single TT and Multiple TT modes?
Yes. The device powers up in Single TT mode by default. The host can switch to Multiple TT mode via a SetInterface request (interface = 1). In Multiple TT mode, each full-/low-speed downstream port receives its own dedicated transaction translator, enabling independent 12 Mbps bandwidth-critical for concurrent full-speed device operation.
How are overcurrent conditions reported and handled?
Overcurrent is detected externally by power switch ICs and signaled to the CY7C65640A-LFXCT via OVR#[n]# inputs. Upon assertion, the hub disables the corresponding PWR#[n]# output, reports the event to the host via the Hub Status Change Endpoint, and lights the amber LED for that port in Automatic Mode-enabling immediate visual and software-level fault isolation.
CY7C65640A-LFXCT 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-LFXCT FAQ
1.How can I place an order for CY7C65640A-LFXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C65640A-LFXCT 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-LFXCT reliable?
The price and inventory of CY7C65640A-LFXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C65640A-LFXCT is usually 5 days.
3.What payment methods are accepted for CY7C65640A-LFXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C65640A-LFXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C65640A-LFXCT?
CY7C65640A-LFXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C65640A-LFXCT 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-LFXCT?
For technical support, including CY7C65640A-LFXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C65640A-LFXCT requirements.
6.How does Aetrix verify that CY7C65640A-LFXCT is sourced from the original manufacturer or authorized distributors?
All CY7C65640A-LFXCT 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-LFXCT meets industry standards.
7.What is the process for return or replacement of CY7C65640A-LFXCT?
All CY7C65640A-LFXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C65640A-LFXCT, 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-LFXCT part is unused and in its original packaging.
Return procedure for CY7C65640A-LFXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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