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Infineon Technologies CY7C65621-56LTXCT
- Part No.:
- CY7C65621-56LTXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Controllers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
CY7C65621-56LTXCT.pdf
- Description:
- IC USB CTLR 2.0 2-PORT AEC 56QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,160
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Product details
Overview
CY7C65621-56LTXCT from Infineon Technologies (formerly Cypress) is a 2-port, bus-powered USB 2.0 hub controller with single transaction translator (TT), integrated 24 MHz PLL, internal voltage regulator, and configurable SPI EEPROM support. It operates across –40 °C to 85 °C, supports USB-IF TID# 30000009 certification, WHQL compliance, and integrates upstream pull-up and downstream pull-down resistors. It targets compact, low-power embedded hubs in monitor docks and keyboard hubs.
For engineers reviewing the CY7C65621-56LTXCT datasheet, CY7C65621-56LTXCT pinout, CY7C65621-56LTXCT application, or CY7C65621-56LTXCT equivalent, key selection criteria include bus-powered operation, 2-port TT architecture, 56-pin QFN package, EEPROM-configurable VID/PID/port power settings, and industrial temperature grade compatibility.
Technical Context
The CY7C65621 implements a dedicated USB Serial Interface Engine (SIE) that handles bit stuffing/unstuffing, checksum generation/checking, TOKEN identification, and address checking independently of hub control logic. Its Hub Repeater manages full/low/high-speed connectivity between upstream and downstream ports, while its single Transaction Translator enables high-speed split transactions to full/low-speed peripherals.
Routing logic dynamically directs traffic either through the TT (for speed translation) or directly through the Repeater (for same-speed transfers). Configuration is loaded at power-up from external SPI EEPROM, enabling runtime customization of port count, power modes, overcurrent timers, indicator polarity, and string descriptors for multilingual support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | USB 2.0 specification compliant; USB-IF certified (TID# 30000009) |
| Ports | 2 downstream ports + 1 upstream port; both downstream ports share single TT |
| Power Mode | Bus powered only; no self-powered option |
| Operating Temp | –40 °C to +85 °C; qualified for industrial applications |
| Clock Source | 24 MHz external crystal with integrated PLL; no external oscillator required |
| Configuration | Configurable via external SPI EEPROM: VID/PID/DID, port count, power settings, overcurrent timers, LED polarity |
| Integrated Passives | Upstream 1.5 kΩ pull-up, downstream 15 kΩ pull-downs, and series termination resistors on all D+/D− lines |
Pinout & Package
Package: 56-pin QFN (8 mm × 8 mm, 0.5 mm pitch), thermally enhanced, RoHS-compliant, lead-free.
| 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 analog supply for PLL and transceiver bias; separate filtering recommended |
| XTAL_IN / XTAL_OUT | Clock Input/Output | Connects to 24 MHz fundamental-mode crystal; internal load capacitors enabled |
| USBDP / USBDM | Upstream D+ / D− | Differential USB 2.0 interface to host; includes integrated 1.5 kΩ pull-up on D+ |
| DB0DP / DB0DM | Downstream Port 0 D+ / D− | First downstream USB port; includes integrated 15 kΩ pull-down on both lines |
| DB1DP / DB1DM | Downstream Port 1 D+ / D− | Second downstream USB port; same integrated termination as Port 0 |
| PWR#0 / PWR#1 | Port Power Enable Outputs | Active-low signals controlling external power switches; polarity configurable via EEPROM |
| OVR#0 / OVR#1 | Overcurrent Indicator Inputs | Active-low inputs from external power switch reporting overcurrent fault per port |
| SPI_SCK / SPI_CS / SPI_SD | SPI Interface | Configures device at startup using external EEPROM; supports VID/PID, port settings, timers |
| LED0 / LED1 | Port Status Indicators | Drives external LEDs; behavior (active-high/low, blink pattern) defined by EEPROM configuration |
Key Features
| Feature | Design Value |
|---|---|
| Single TT Architecture | Enables cost-effective 2-port hub with full USB 2.0 high-speed ↔ full-speed translation without dual-TT complexity |
| Integrated Passive Components | Eliminates 12 discrete resistors (pull-ups/downs/terminations), reducing BOM count and PCB area |
| EEPROM-Based Configuration | Allows field-programmable VID/PID, port enablement/removability, power-on timer, and overcurrent detection timing (0–15 ms) |
| Industrial Temperature Range | Validated operation from –40 °C to +85 °C supports deployment in monitors, docking stations, and industrial enclosures |
| USB-IF & WHQL Certified | Guarantees interoperability with Windows hosts and compliance with USB-IF test suite (TID# 30000009) |
Applications
| Monitor Hubs | Keyboard Hubs |
|---|---|
Use Scenario: Adding USB-A ports to display interfaces (e.g., DisplayPort Alt Mode or USB-C monitors). IC Role / Device Role / Timing Role: USB 2.0 hub controller managing upstream connection to host PC and downstream connections to peripherals. Use Value: Enables compact, bus-powered expansion without external regulators or discrete termination resistors. | Use Scenario: Integrating multiple USB devices (e.g., keyboard, mouse, headset) into a single upstream connection. IC Role / Device Role / Timing Role: Low-power 2-port hub providing shared TT for HID-class peripherals. Use Value: Reduces standby current draw and eliminates need for external power switching circuitry. |
| Docking Stations | External Storage Enclosures |
Use Scenario: Compact dock supporting USB peripherals alongside video/audio in space-constrained laptops. IC Role / Device Role / Timing Role: Bus-powered hub controller handling enumeration, port power control, and status reporting. Use Value: Supports ganged or individual port power switching and configurable overcurrent response per port. | Use Scenario: Adding USB 2.0 connectivity to portable SSD enclosures or HDD docks. IC Role / Device Role / Timing Role: USB 2.0 hub managing upstream link to host and downstream link to storage controller. Use Value: Integrated 24 MHz PLL ensures stable timing without external clock source; EEPROM allows vendor branding. |
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 |
|---|---|---|---|
| CY7C65631-56LTXCT | 4-port variant with same 56-pin QFN package and single TT; higher port count but identical power/performance envelope | Used where ≥3 downstream devices require hubbing; not suitable for strict 2-port footprint constraints | Select when additional downstream ports are needed without changing board layout or firmware interface |
| UPD720114GA-YF-BAC-A | 3-port, self-powered only; no bus-powered mode; requires 1.2 V core + 3.3 V I/O supplies; no integrated EEPROM configuration | Targeted at host-embedded applications with dedicated power rails; lacks plug-and-play VID/PID customization | Choose only if self-powered design is acceptable and external configuration management is already in place |
Compared with CY7C65631-56LTXCT, the CY7C65621 offers tighter footprint and lower system cost for 2-device use cases; versus UPD720114GA, it eliminates dual-supply complexity and enables rapid customization via SPI EEPROM-critical for branded peripheral designs.
Availability
CY7C65621-56LTXCT is available at Aetrix Electronics and suitable for monitor hubs, keyboard hubs, docking stations, and external storage enclosures requiring stable component supply, industrial temperature operation, and USB-IF-certified interoperability.
Supply support for CY7C65621-56LTXCT 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-reliability mixed-signal solutions for embedded connectivity.
The CY7C65621 belongs to the EZ-USB HX2LP Lite™ family, engineered specifically for ultra-low-power, cost-sensitive USB 2.0 hub applications in space-constrained consumer and industrial peripherals.
FAQ
Is CY7C65621-56LTXCT compatible with USB 3.0 hosts?
No. The CY7C65621 is a USB 2.0 hub controller only and connects exclusively via USB 2.0 signaling. When attached to a USB 3.0 host port, it operates in USB 2.0 backward-compatible mode at high/full/low speed, but does not support SuperSpeed (5 Gbps) data rates or associated protocols.
Does CY7C65621 require an external crystal?
Yes. It requires a 24 MHz fundamental-mode quartz crystal connected to XTAL_IN/XTAL_OUT pins. Internal load capacitance is provided, so no external capacitors are needed unless board-level parasitics demand fine-tuning.
Can the number of active downstream ports be changed after manufacturing?
Yes. Port enablement/removability is defined in the external SPI EEPROM configuration (0xD2 or 0xD4 load). Reprogramming the EEPROM allows dynamic reconfiguration of active port count, power settings, and overcurrent behavior without hardware changes.
What is the function of the PWR# and OVR# pins?
PWR#0/PWR#1 are active-low outputs driving external port power switches; OVR#0/OVR#1 are active-low inputs receiving overcurrent fault signals from those same switches. Their polarity (active-high vs. active-low) is configurable via EEPROM, enabling flexibility with different power switch ICs.
CY7C65621-56LTXCT 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:
- -
CY7C65621-56LTXCT FAQ
1.How can I place an order for CY7C65621-56LTXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C65621-56LTXCT 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 CY7C65621-56LTXCT reliable?
The price and inventory of CY7C65621-56LTXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C65621-56LTXCT is usually 5 days.
3.What payment methods are accepted for CY7C65621-56LTXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C65621-56LTXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C65621-56LTXCT?
CY7C65621-56LTXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C65621-56LTXCT 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 CY7C65621-56LTXCT?
For technical support, including CY7C65621-56LTXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C65621-56LTXCT requirements.
6.How does Aetrix verify that CY7C65621-56LTXCT is sourced from the original manufacturer or authorized distributors?
All CY7C65621-56LTXCT 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 CY7C65621-56LTXCT meets industry standards.
7.What is the process for return or replacement of CY7C65621-56LTXCT?
All CY7C65621-56LTXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C65621-56LTXCT, 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 CY7C65621-56LTXCT part is unused and in its original packaging.
Return procedure for CY7C65621-56LTXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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