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Infineon Technologies CY7C65634-28LTXCT
- Part No.:
- CY7C65634-28LTXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Controllers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
CY7C65634-28LTXCT.pdf
- Description:
- IC CONTROLLER USB 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,248
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Product details
Overview
CY7C65634-28LTXCT from Infineon is a USB 2.0 hub controller IC with single transaction translator, supporting up to four downstream ports (two active, two NC in 28-pin QFN), bus/self-power auto-switching, integrated 5 V-to-3.3 V regulator, and 12 MHz ±500 ppm crystal input. It operates across 0°C to 70°C and targets ultra-low-power embedded USB hubs in space-constrained designs.
For engineers reviewing the CY7C65634-28LTXCT datasheet, CY7C65634-28LTXCT pinout, CY7C65634-28LTXCT application, or CY7C65634-28LTXCT equivalent, key selection criteria include TT architecture, power mode flexibility, EEPROM-configurable port topology, and QFN-28 package compatibility with USB 2.0 signal integrity requirements.
Technical Context
The CY7C65634 implements a single-TT USB 2.0 hub architecture with integrated SIE, HS USB control logic, and hub repeater logic - enabling full-speed and low-speed device support on downstream ports while maintaining high-speed upstream connectivity. Its MCU (2 KB ROM, 64 B RAM) executes enumeration, suspend/resume coordination, and GPIO-controlled configuration without external firmware.
Power management includes internal 5 V-to-3.3 V regulation, external 3.3 V supply option, automatic bus/self-power mode switching, and per-port overcurrent detection with dedicated OVR# pins. Clocking supports 12 MHz crystal (600 µW drive level) or optional 27/48 MHz oscillator input via integrated PLL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | USB 2.0 specification compliant (TID# 30000060); supports HS upstream, FS/LS downstream |
| Downstream Ports | 4-port hub with ports 3–4 internally disconnected in 28-pin QFN; only ports 1–2 active |
| Transaction Translator | Single TT shared across all downstream ports; enables split transactions for FS/LS devices behind HS host |
| Supply Voltage | 5 V nominal input; internal regulator delivers 3.3 V; external 3.3 V supply also supported |
| Operating Temp | 0°C to +70°C ambient; validated for commercial-grade embedded USB peripheral applications |
| Package | 28-pin QFN (5 mm × 5 mm, 0.5 mm pitch); thermally enhanced for low-power hub operation |
| Configuration | VIN/PID, port count, removable status, and power mode set via external EEPROM or mask ROM |
Pinout & Package
28-pin QFN (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | 5 V Power Input | Main supply for internal regulator and core logic; requires local 10 µF + 0.1 µF decoupling |
| VDDIO | 3.3 V I/O Supply | Supplies USB PHY and GPIO; can be driven externally or sourced from internal regulator |
| XTAL_IN / XTAL_OUT | Crystal Oscillator Interface | Accepts 12 MHz ±500 ppm fundamental-mode crystal; internal PLL generates USB clock |
| D+ / D− (UP) | Upstream USB Differential Pair | Connects to host controller; integrated termination resistors (15 kΩ pull-down, 1.5 kΩ pull-up) |
| D+ / D− (DP1/DM1) | Downstream Port 1 Differential Pair | FS/LS-capable; integrated 15 kΩ pull-down resistors; OVR#1 monitors overcurrent |
| PWR#1 / PWR#2 | Port Power Enable Outputs | Active-low GPIO-controlled switches for individual downstream port power gating |
| I2C_SDA / I2C_SCL | EEPROM Configuration Interface | Supports external I²C EEPROM (up to 256 bytes) for VID/PID, port config, and power settings |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Regulator | On-chip 5 V-to-3.3 V regulator eliminates need for external LDO in self-powered designs |
| Auto Power Mode Switching | Dynamically selects bus-powered or self-powered operation based on VDD presence and load conditions |
| Configurable Port Topology | Number of ports, removable/non-removable status, and gang/individual power control set via EEPROM or pin strapping |
| ESD Recovery Logic | Internal power-failure detection resets USB state machine after ESD-induced supply glitch |
| Low-Power TT Architecture | Single TT reduces silicon area and dynamic power vs. multi-TT hubs while maintaining USB 2.0 compliance |
Applications
| USB-C Docking Station | Industrial Human-Machine Interface |
|---|---|
Use Scenario: Compact docking station with dual USB-A downstream ports for keyboard/mouse and storage, powered via USB-C PD source. IC Role / Device Role / Timing Role: USB 2.0 hub controller managing upstream link to host and downstream links to peripherals; provides port power control and overcurrent protection. Use Value: Enables dual-port expansion in <12 mm² PCB area using QFN-28; auto power mode switching ensures compatibility with both bus- and self-powered dock configurations. | Use Scenario: Factory-floor HMI panel with USB 2.0 interface for firmware updates and data logging via flash drive. IC Role / Device Role / Timing Role: Hub controller providing isolated, ESD-hardened USB connectivity between ARM-based HMI SoC and removable media. Use Value: Integrated termination, pull-up/down resistors, and ESD recovery reduce BOM by ≥7 passives; 0°C–70°C rating ensures reliability in uncontrolled industrial environments. |
| Medical Point-of-Care Device | Embedded Test Equipment |
Use Scenario: Portable diagnostic instrument with USB 2.0 port for exporting patient data to PC or printer. IC Role / Device Role / Timing Role: Low-power hub controller enabling simultaneous connection of USB UART bridge and HID-class printer interface. Use Value: Single-TT architecture minimizes latency for time-critical HID reports; 28-pin QFN allows routing in tight medical enclosure layouts with minimal layer count. | Use Scenario: Benchtop test fixture requiring USB 2.0 host-side connection to multiple DUTs via individually powered downstream ports. IC Role / Device Role / Timing Role: Configurable hub controller supporting ganged power enable for batch testing or independent port control for selective DUT activation. Use Value: EEPROM-based configuration allows field-upgradable port mapping; PWR#/OVR# pins enable hardware-level fault isolation during automated test sequences. |
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 |
|---|---|---|---|
| CY7C65632-28LTXCT | Same die, 2-port fixed configuration (no EEPROM port count override); identical pinout and electrical specs | No runtime port count reconfiguration; mask-ROM only; lower cost for static 2-port designs | Select when port count is fixed and EEPROM programming infrastructure is unavailable |
| UPD720114GA-YB-A | Multi-TT hub (2 TTs); higher power consumption; supports 4 active downstream ports in 48-pin QFP | Required for concurrent high-bandwidth FS/LS device operation (e.g., audio + HID); not pin-compatible | Choose only when simultaneous full-speed device traffic demands multi-TT performance |
Compared with CY7C65632-28LTXCT, this part adds EEPROM configurability for port count and power modes; versus UPD720114GA-YB-A, it trades TT count and port count for lower power and smaller footprint - optimal for cost- and space-sensitive 2-port hubs.
Availability
CY7C65634-28LTXCT is available at Aetrix Electronics and suitable for USB-C docking stations, industrial HMIs, medical point-of-care devices, and embedded test equipment requiring stable component supply and long-term design-in support.
Supply support for CY7C65634-28LTXCT 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 is a German semiconductor manufacturer specializing in power management, sensing, and connectivity solutions for automotive, industrial, and consumer markets.
The HX2VL product line delivers ultra-low-power USB 2.0 hub controllers optimized for space-constrained, battery-aware, and cost-sensitive embedded systems requiring certified USB connectivity.
FAQ
Does CY7C65634-28LTXCT support USB Battery Charging (BC) 1.2?
No. The CY7C65634-28LTXCT does not implement BC 1.2 detection circuitry or D+/D− voltage monitoring for charging port identification. It complies strictly with USB 2.0 hub specifications and supports only standard USB data and power delivery per USB 2.0, including bus-powered operation and per-port current limiting via OVR# signals.
Can the 28-pin QFN package operate without an external crystal?
No. The CY7C65634-28LTXCT requires either a 12 MHz ±500 ppm crystal (XTAL_IN/XTAL_OUT) or an external 27/48 MHz oscillator signal applied to XTAL_IN with XTAL_OUT left unconnected. There is no internal RC oscillator; clock accuracy and jitter performance depend entirely on the external timing source.
What is the maximum allowable trace length for D+/D− signals in 28-pin QFN layout?
For reliable USB 2.0 high-speed signaling, differential D+/D− traces must be length-matched within ±50 mils and impedance-controlled at 90 Ω ±10%. Total trace length from CY7C65634-28LTXCT pads to connector should not exceed 4 inches (100 mm) with continuous ground reference plane and no stubs - verified per USB-IF compliance guidelines in AN72332.
Is EEPROM configuration mandatory for basic hub operation?
No. Default functionality (2-port hub, individual power switching, removable ports) operates without EEPROM. External EEPROM is required only to customize VID/PID, port count beyond 2, non-removable port flags, or gang-mode power control - all other features function using factory mask-ROM defaults.
CY7C65634-28LTXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 28-WFQFN Exposed Pad
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Hub Controller
- Interface:
- USB
- Standards:
- USB 2.0
- Voltage - Supply:
- 3.15V ~ 5.25V
- Current - Supply:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-QFN (5x5)
- Grade:
- -
- Qualification:
- -
CY7C65634-28LTXCT FAQ
1.How can I place an order for CY7C65634-28LTXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C65634-28LTXCT 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 CY7C65634-28LTXCT reliable?
The price and inventory of CY7C65634-28LTXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C65634-28LTXCT is usually 5 days.
3.What payment methods are accepted for CY7C65634-28LTXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C65634-28LTXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C65634-28LTXCT?
CY7C65634-28LTXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C65634-28LTXCT 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 CY7C65634-28LTXCT?
For technical support, including CY7C65634-28LTXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C65634-28LTXCT requirements.
6.How does Aetrix verify that CY7C65634-28LTXCT is sourced from the original manufacturer or authorized distributors?
All CY7C65634-28LTXCT 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 CY7C65634-28LTXCT meets industry standards.
7.What is the process for return or replacement of CY7C65634-28LTXCT?
All CY7C65634-28LTXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C65634-28LTXCT, 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 CY7C65634-28LTXCT part is unused and in its original packaging.
Return procedure for CY7C65634-28LTXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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