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Infineon Technologies CY7C65621-56LTXIT
- Part No.:
- CY7C65621-56LTXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Controllers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
CY7C65621-56LTXIT.pdf
- Description:
- IC USB CTLR 2.0 4PORT 56-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,866
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Product details
Overview
CY7C65621-56LTXIT from Infineon Technologies (formerly Cypress) is a 2-port, bus-powered USB 2.0 hub controller with single transaction translator (TT), integrated USB 2.0 PHYs, internal 24 MHz PLL, and on-chip pull-up/down/termination resistors. It operates across –40 °C to 85 °C, supports in-system SPI EEPROM configuration (VID/PID/DID, port count, power settings), and targets compact embedded hubs in space-constrained industrial and automotive systems.
For engineers reviewing the CY7C65621-56LTXIT datasheet, CY7C65621-56LTXIT pinout, CY7C65621-56LTXIT application, or CY7C65621-56LTXIT equivalent, key selection criteria include its 2-port bus-powered topology, single-TT architecture for cost-sensitive full-speed–capable designs, QFN-56 package footprint, and configurable overcurrent timing and port indicator polarity via external SPI EEPROM.
Technical Context
The CY7C65621 implements a dedicated USB 2.0 Serial Interface Engine (SIE) that handles bit stuffing/unstuffing, checksum generation/checking, TOKEN identification, and address checking independently of the Hub Control Block. Its Hub Repeater manages upstream–downstream connectivity at low/full/high speed, while the single Transaction Translator (TT) enables high-speed host-to-full/low-speed device translation.
Routing logic dynamically assigns downstream ports to either the TT or Repeater based on attached device speed. The device integrates upstream 1.5 kΩ pull-up and downstream 15 kΩ pull-down resistors, plus series termination on all D+/D− lines - eliminating 12 discrete passives. Configuration is loaded at power-up from an external SPI EEPROM, supporting vendor-defined descriptors and operational modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | USB 2.0 specification compliant; USB-IF certified (TID# 30000009); WHQL compliant |
| Port Count | 2 downstream ports; both share one transaction translator - reduces silicon area and cost vs. multi-TT hubs |
| Power Mode | Bus powered only - draws VBUS directly; no self-power option; simplifies power design for low-power peripherals |
| Operating Temp | –40 °C to +85 °C - qualified for industrial and automotive-grade applications without derating |
| Crystal Input | 24 MHz external crystal with integrated PLL - eliminates need for external clock generator or oscillator |
| Configuration | External SPI EEPROM programmable - supports VID/PID/DID, port removability, overcurrent timer (0–15 ms), LED polarity, ganged switching |
| Package | 56-pin QFN (7 mm × 7 mm, 0.4 mm pitch) - surface-mount, thermally enhanced, RoHS-compliant |
Pinout & Package
Package: 56-pin QFN (7 mm × 7 mm, 0.4 mm pitch), exposed thermal pad, RoHS-compliant, moisture sensitivity level 3 (MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O power supply | 3.0–3.6 V supply for USB transceivers and digital I/O; decoupling required per datasheet |
| VDD | Core power supply | 3.0–3.6 V supply for internal logic and PLL; separate from VDDIO for noise isolation |
| D+ / D− (UP) | Upstream differential pair | Connects to host-side USB port; includes integrated 1.5 kΩ pull-up on D+ for full-speed enumeration |
| D+ / D− (DP1/DP2) | Downstream differential pairs | Each port has integrated 15 kΩ pull-down on D− and series termination on both lines |
| PWR#[1], PWR#[2] | Port power enable outputs | Active-low open-drain signals driving external port power switches; polarity configurable via EEPROM |
| OVR#[1], OVR#[2] | Overcurrent fault inputs | Active-low inputs from external power switch; filtered overcurrent detection (0–15 ms configurable) |
| LED[1], LED[2] | Port status indicator control | Open-drain outputs for green activity LEDs; polarity and enable/disable state EEPROM-configurable |
| SPI_SCK / SPI_CS / SPI_SD | SPI interface | Loads configuration from external EEPROM at power-up; supports multiple language string descriptors |
| XTAL_IN / XTAL_OUT | Crystal oscillator interface | Drives 24 MHz fundamental-mode crystal; internal PLL generates required USB clocks |
Key Features
| Feature | Design Value |
|---|---|
| Integrated passive components | On-die 1.5 kΩ upstream pull-up, 15 kΩ downstream pull-downs, and series termination resistors - cuts BOM by ≥12 passives |
| Configurable overcurrent response | Per-port overcurrent filter time adjustable from 0 to 15 ms via EEPROM - enables tuning for diverse load profiles |
| Flexible port power control | Ganged or individual port switching supported; default is per-port; PWR# polarity configurable to match common power switch ICs |
| Multi-language descriptor support | Fully configurable string descriptors stored in external SPI EEPROM - enables localized UI for global OEM deployments |
| Industrial temperature range | Validated operation from –40 °C to +85 °C - eliminates need for thermal margining in harsh environments |
Applications
| Standalone USB Hub | Monitor Integrated Hub |
|---|---|
Use Scenario: Compact desktop or kiosk peripheral expansion requiring two additional USB ports without host renegotiation. IC Role / Device Role / Timing Role: Bus-powered 2-port hub controller managing upstream enumeration and downstream device attachment/detachment events. Use Value: Eliminates external resistors and crystal oscillator, reducing PCB area by >15% versus discrete hub solutions. | Use Scenario: USB-C or DisplayPort Alt Mode monitor with built-in USB 2.0 hub for keyboard/mouse connectivity. IC Role / Device Role / Timing Role: Low-power hub controller interfacing between monitor's USB upstream port and front-panel downstream ports. Use Value: Single-TT architecture ensures deterministic latency for HID devices; industrial temp rating supports monitor enclosure heat buildup. |
| Industrial Docking Station | Embedded Keyboard Hub |
Use Scenario: Ruggedized docking station for factory-floor HMIs or test equipment requiring reliable hot-plug USB peripherals. IC Role / Device Role / Timing Role: Robust hub controller handling remote wakeup, port suspend/resume, and overcurrent protection in noisy EMI environments. Use Value: Configurable OVR# filter time prevents false trips from inrush currents during tool attachment; MSL3 QFN withstands reflow and field thermal cycling. | Use Scenario: Mechanical keyboard with integrated USB hub for RGB lighting controller and auxiliary ports. IC Role / Device Role / Timing Role: Space-constrained hub controller enabling dual downstream connectivity while sharing bandwidth via single TT. Use Value: 56-pin QFN footprint fits tight keyboard PCB layouts; LED[1]/LED[2] outputs drive status indicators without external drivers. |
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 |
|---|---|---|---|
| CY7C65631-56LTXI | 4-port variant with same 56-pin QFN package and single TT; higher port count but identical power/performance envelope | Used where four downstream ports are required; shares same layout footprint and firmware compatibility | Select when expanding port count without changing board layout or driver stack |
| UPD720114GA | 4-port, self-powered/battery-backed USB 2.0 hub controller; includes integrated voltage regulators and battery charging logic | Targets portable devices needing battery backup and independent power management; not bus-powered only | Choose only if self-power capability, battery charging, or >2 ports are mandatory requirements |
Compared with CY7C65631-56LTXI, the CY7C65621-56LTXIT offers lower system cost and reduced power draw for 2-port use cases, while UPD720114GA adds complexity and cost for features unnecessary in bus-powered embedded hubs.
Availability
CY7C65621-56LTXIT is available at Aetrix Electronics and suitable for standalone USB hubs, monitor-integrated hubs, industrial docking stations, and embedded keyboard hubs requiring stable component supply, long-term lifecycle support, and automotive-grade temperature performance.
Supply support for CY7C65621-56LTXIT 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 now owns and supports the full EZ-USB portfolio, including legacy Cypress USB hub controllers.
The CY7C65621 belongs to the EZ-USB HX2LP Lite™ family - designed specifically for ultra-low-power, cost-optimized USB 2.0 hub implementations in space- and power-constrained industrial and automotive systems.
FAQ
Is CY7C65621-56LTXIT compatible with USB 3.x hosts?
No. The CY7C65621-56LTXIT is a USB 2.0 hub controller only and operates exclusively at low/full/high speed (up to 480 Mbps). It connects to USB 3.x hosts via backward-compatible USB 2.0 upstream ports but does not support SuperSpeed (5 Gbps) signaling or associated protocols.
Does it require an external crystal oscillator?
Yes - a 24 MHz fundamental-mode crystal must be connected to XTAL_IN/XTAL_OUT. The device integrates a PLL to generate all required USB clocks, but no internal RC oscillator is provided; crystal accuracy must meet ±0.05% for USB 2.0 compliance.
Can it operate without an external SPI EEPROM?
No. The device reads critical configuration (VID/PID/DID, port count, power settings) from external SPI EEPROM at power-up. If no EEPROM is present or communication fails, the device halts initialization and remains non-functional - no factory-default configuration is embedded.
What is the maximum current draw from VBUS?
The CY7C65621-56LTXIT draws ≤100 mA from VBUS under typical operation (including internal logic, PHYs, and pull-ups). This meets USB 2.0 bus-powered hub limits, but downstream port power must be supplied externally via PWR#-controlled switches - the IC itself does not deliver port power.
CY7C65621-56LTXIT 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 56-QFN (8x8)
- Grade:
- -
- Qualification:
- -
CY7C65621-56LTXIT FAQ
1.How can I place an order for CY7C65621-56LTXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C65621-56LTXIT 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 CY7C65621-56LTXIT reliable?
The price and inventory of CY7C65621-56LTXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C65621-56LTXIT is usually 5 days.
3.What payment methods are accepted for CY7C65621-56LTXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C65621-56LTXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C65621-56LTXIT?
CY7C65621-56LTXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C65621-56LTXIT 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 CY7C65621-56LTXIT?
For technical support, including CY7C65621-56LTXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C65621-56LTXIT requirements.
6.How does Aetrix verify that CY7C65621-56LTXIT is sourced from the original manufacturer or authorized distributors?
All CY7C65621-56LTXIT 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 CY7C65621-56LTXIT meets industry standards.
7.What is the process for return or replacement of CY7C65621-56LTXIT?
All CY7C65621-56LTXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C65621-56LTXIT, 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 CY7C65621-56LTXIT part is unused and in its original packaging.
Return procedure for CY7C65621-56LTXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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