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Infineon Technologies CY7C65631-56LTXCT
- Part No.:
- CY7C65631-56LTXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Controllers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
CY7C65631-56LTXCT.pdf
- Description:
- IC USB CTLR 2.0 4PORT AEC 56QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,061
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Product details
Overview
CY7C65631-56LTXCT from Infineon Technologies (formerly Cypress) is a 4-port USB 2.0 hub controller with single transaction translator, 56-pin QFN package, –40 °C to +85 °C industrial temperature grade, and integrated 24 MHz PLL clock synthesis. It serves as a low-power, self-contained upstream/downstream interface in embedded docking stations and monitor hubs requiring bus- or self-powered operation.
For engineers reviewing the CY7C65631-56LTXCT datasheet, CY7C65631-56LTXCT pinout, CY7C65631-56LTXCT application, or CY7C65631-56LTXCT equivalent, key selection criteria include TT architecture for mixed-speed device support, EEPROM-configurable port power/overcurrent behavior, integrated termination resistors, and pin compatibility with CY7C65640.
Technical Context
The CY7C65631 implements a dedicated single Transaction Translator (TT) shared across all four downstream ports, enabling high-speed upstream communication while supporting full- or low-speed peripherals without bandwidth contention between ports. Its USB Serial Interface Engine (SIE) handles bit stuffing, checksum validation, and address checking autonomously.
Routing logic dynamically directs traffic either through the TT (for speed translation) or the Hub Repeater (for same-speed transfers), with automatic chirp negotiation on upstream connection to establish high-speed mode. Internal regulators and integrated 1.5 kΩ upstream pull-up / 15 kΩ downstream pull-down resistors eliminate six external passives per port.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | USB 2.0 specification compliant; USB-IF certified (TID# 30000009); WHQL validated |
| Ports | 1 upstream + 4 downstream ports; all downstream ports share one TT |
| Power Modes | Supports bus-powered and self-powered configurations; ganged or per-port power switching |
| Operating Temp | –40 °C to +85 °C; qualified for industrial and automotive-grade applications |
| Clock Source | 24 MHz external crystal with integrated PLL; no external oscillator required |
| Configuration | In-system programmable via SPI EEPROM; supports VID/PID/DID, port count, overcurrent timer, indicator polarity |
| Package | 56-pin QFN (7 mm × 7 mm, 0.4 mm pitch); RoHS-compliant, lead-free |
Pinout & Package
Package: 56-pin QFN (7 mm × 7 mm, 0.4 mm pitch), exposed thermal pad, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Power Supply | 3.3 V supply for USB transceivers and digital I/O; decoupling required |
| VDDA | Analog Core Supply | 3.3 V supply for PLL and USB PHY; separate filtering recommended |
| D+/D– (UP) | Upstream Differential Pair | Connects to host or upstream hub; includes integrated 1.5 kΩ pull-up on D+ |
| D+/D– (DP1–DP4) | Downstream Differential Pairs | Four independent USB 2.0 ports; each has integrated 15 kΩ pull-down and series termination |
| PWR#[1–4] | Port Power Enable Outputs | Active-low signals controlling external power switches; polarity configurable via EEPROM |
| OVR#[1–4] | Overcurrent Detection Inputs | Active-low inputs from external power switch OCP pins; 0–15 ms filter time EEPROM-configurable |
| SPI_SCK/SPI_CS/SPI_SD | Configuration Interface | 3-wire SPI bus for external EEPROM programming of VID/PID/port settings at power-up |
| XTAL_IN/XTAL_OUT | Clock Input/Output | Drives 24 MHz fundamental-mode crystal; internal PLL generates 480 MHz USB clock |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Passive Components | Eliminates 1.5 kΩ upstream pull-up, 15 kΩ downstream pull-downs, and 27 Ω series terminations per port - reduces BOM count by ≥12 passives |
| Configurable Overcurrent Handling | Per-port OVR# input with 0–15 ms filter window; enables robust hot-plug resilience without firmware intervention |
| Flexible Power Switching | Ganged or individual port power control via PWR#[1–4]; polarity and enable timing fully EEPROM-defined |
| Multi-language Descriptor Support | Fully configurable string descriptors stored in external SPI EEPROM - supports localized UI in end-user devices |
| Industrial Temperature Range | Validated operation from –40 °C to +85 °C - suitable for uncontrolled ambient environments in industrial docks and displays |
Applications
| Standalone USB Hub | Monitor Integrated Hub |
|---|---|
Use Scenario: Compact desktop hub with four downstream ports, powered via upstream cable only. IC Role / Device Role / Timing Role: Central USB 2.0 hub controller managing enumeration, TT-based speed translation, and port power sequencing. Use Value: Single-chip solution eliminates discrete transceivers and passive network, reducing PCB area by >35% vs. legacy hub ICs. | Use Scenario: USB hub embedded in LCD monitor housing, providing keyboard/mouse/storage connectivity alongside video. IC Role / Device Role / Timing Role: Downstream-facing hub controller interfacing with display's microcontroller via I²C or GPIO for status reporting. Use Value: Integrated port indicators and EEPROM-configurable LED polarity simplify front-panel UI integration without additional logic. |
| Docking Station Hub | External Storage Enclosure |
Use Scenario: Multi-interface dock connecting laptop to peripherals including Ethernet, audio, and USB devices. IC Role / Device Role / Timing Role: High-reliability hub controller handling concurrent full-speed HID and high-speed storage traffic via shared TT. Use Value: Industrial temp rating and USB-IF certification ensure plug-and-play compatibility across Windows/macOS/Linux hosts. | Use Scenario: Bus-powered 4-bay NAS enclosure with individual port power control for drive spin-up sequencing. IC Role / Device Role / Timing Role: Self-powered hub controller coordinating staggered PWR# activation to limit inrush current during hot-attach. Use Value: Configurable 8 ms default overcurrent filter prevents false trips during simultaneous drive initialization. |
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 |
|---|---|---|---|
| CY7C65640-56LTXC | Pin-for-pin compatible; identical 4-port/single-TT architecture; differs in EEPROM configuration defaults and minor timing specs | No functional difference in hub operation; same industrial temp grade and QFN package | Select when legacy design reuse or existing PCB layout requires no change |
| UPD720114GA-YF-BAC-A | 4-port, dual-TT architecture; higher power consumption; requires external 12 MHz crystal and more passives | Better suited for high-bandwidth multi-peripheral systems needing independent TT per port pair | Choose only if per-port TT isolation is required - not drop-in compatible |
Compared with CY7C65640-56LTXC, the CY7C65631-56LTXCT offers identical footprint and core functionality but with optimized low-power biasing and updated EEPROM mapping; versus UPD720114GA, it trades TT flexibility for lower BOM cost and smaller board area.
Availability
CY7C65631-56LTXCT is available at Aetrix Electronics and suitable for standalone hubs, monitor-integrated USB expansion, and industrial docking stations requiring stable component supply, long-term lifecycle assurance, and automotive-grade temperature resilience.
Supply support for CY7C65631-56LTXCT 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
Infineon Technologies acquired Cypress Semiconductor in 2020 and maintains the full EZ-USB portfolio, delivering high-performance mixed-signal ICs for industrial, automotive, and computing applications.
The CY7C65631 belongs to the EZ-USB HX2LP Lite™ family - designed specifically for cost-sensitive, space-constrained USB 2.0 hub implementations where integrated passives, EEPROM configurability, and industrial temperature range are critical.
FAQ
Does CY7C65631-56LTXCT require an external crystal?
Yes - it requires a 24 MHz fundamental-mode quartz crystal connected to XTAL_IN/XTAL_OUT. The internal PLL synthesizes the 480 MHz USB clock; no external oscillator or clock generator is needed. Crystal load capacitance must match the 12 pF specification in the datasheet for reliable high-speed enumeration.
Can CY7C65631-56LTXCT operate without an external SPI EEPROM?
No - it relies on external SPI EEPROM for essential configuration including VID/PID/DID, port count, and power settings. Without EEPROM, the device fails to enumerate. Default factory values are not programmed; blank EEPROM results in undefined behavior during system initialization.
What is the maximum current drive capability of the PWR# pins?
The PWR#[1–4] outputs are open-drain, active-low signals rated for 8 mA sink current at 3.3 V. They interface directly with standard USB power switch enable inputs (e.g., TPS2068, AP2172) but cannot drive loads exceeding 8 mA or voltages above 3.3 V without level-shifting circuitry.
Is CY7C65631-56LTXCT compatible with USB 3.0 hosts?
It operates exclusively as a USB 2.0 hub and connects only to USB 2.0 upstream ports. When plugged into a USB 3.0 Type-A port, it functions at USB 2.0 speeds (480 Mbps max). It does not support SuperSpeed signaling, SS lane detection, or USB 3.x protocol extensions.
CY7C65631-56LTXCT 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:
- -
CY7C65631-56LTXCT FAQ
1.How can I place an order for CY7C65631-56LTXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C65631-56LTXCT 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 CY7C65631-56LTXCT reliable?
The price and inventory of CY7C65631-56LTXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C65631-56LTXCT is usually 5 days.
3.What payment methods are accepted for CY7C65631-56LTXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C65631-56LTXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C65631-56LTXCT?
CY7C65631-56LTXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C65631-56LTXCT 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 CY7C65631-56LTXCT?
For technical support, including CY7C65631-56LTXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C65631-56LTXCT requirements.
6.How does Aetrix verify that CY7C65631-56LTXCT is sourced from the original manufacturer or authorized distributors?
All CY7C65631-56LTXCT 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 CY7C65631-56LTXCT meets industry standards.
7.What is the process for return or replacement of CY7C65631-56LTXCT?
All CY7C65631-56LTXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C65631-56LTXCT, 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 CY7C65631-56LTXCT part is unused and in its original packaging.
Return procedure for CY7C65631-56LTXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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