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Infineon Technologies CYPD5126-40LQXIT
- Part No.:
- CYPD5126-40LQXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- -
- Datasheet:
-
CYPD5126-40LQXIT.pdf
- Description:
- IC MCD CCG5C WIRED 40-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
CYPD5126-40LQXIT from Infineon Technologies (formerly Cypress) is a single-port USB Type-C and Power Delivery 3.0 port controller featuring a 48-MHz Arm® Cortex®-M0 CPU, 128-KB flash, integrated CC transceiver with Rp/Rd termination, VCONN FETs, and high-voltage protection on CC/SBU pins. It delivers full PD protocol stack execution, Fast Role Swap, and supports dead-battery detection in PCs, notebooks, and Thunderbolt/non-Thunderbolt docks.
For engineers reviewing the CYPD5126-40LQXIT datasheet, CYPD5126-40LQXIT pinout, CYPD5126-40LQXIT application, or CYPD5126-40LQXIT equivalent, key selection criteria include USB-PD 3.0 compliance, integrated 40-pin QFN package with industrial temperature range (–40 °C to +85 °C), dual-role power (DRP) capability, VBUS OVP/UVP/OCP programmability, and hardware-controlled VCONN switching for active EMCA cables.
Technical Context
The CYPD5126-40LQXIT implements a complete USB-PD 3.0 physical layer with BMC encoding/decoding, 4b/5b framing, SOP detection, CRC generation, and collision avoidance-enabling half-duplex communication over CC lines. Its integrated Rp current source supports 500 mA/900 mA/1.5 A/3 A DFP configurations, while Rd and dead-battery Rd terminations enable UFP and DRP operation.
It integrates dual analog muxes: a 2×2 USB 2.0 HS switch supporting orientation-aware routing of DPLUS/DMINUS, and a 4×2 SBU crossbar for DisplayPort/Thunderbolt alternate mode selection. The 8-bit SAR ADC with DAC-comparator and 4-input AMUX enables system-level voltage/temperature monitoring, with all GPIOs (except CC1/CC2) accessible to the analog subsystem.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB-PD Version | Complies with USB Power Delivery 3.0 specification including Extended Messages and Fast Role Swap (FRS) |
| CPU Core | 32-bit Arm Cortex-M0 running at 48 MHz with SWD debug interface and 12-KB SRAM |
| Flash Memory | 128-KB on-chip flash with accelerator enabling near-SRAM access performance at 48 MHz |
| Package | 40-pin QFN, 6.0 mm × 6.0 mm, 0.5 mm pitch, industrial temperature range (–40 °C to +85 °C) |
| Voltage Ranges | VSYS: 2.75 V–5.5 V; VBUS: 4.0 V–21.5 V; integrated LDO supports dead-battery operation up to 21.5 V |
| Protection Features | Hardware-configurable VBUS OVP/UVP/OCP; high-voltage short protection on CC/SBU pins; VCONN OCP (1.5 W) |
| Integrated Analog Blocks | 8-bit SAR ADC with DAC-comparator and 4-input AMUX; integrated VCONN FETs; high-side CSA for 10-mΩ sense resistor |
Pinout & Package
The CYPD5126-40LQXIT is housed in a 6.0 mm × 6.0 mm, 0.5 mm pitch, 40-pin QFN package with exposed thermal pad. Pin functions are validated per Infineon's official datasheet (Document Number: 002-23803 Rev. *D).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CC1, CC2 | USB Type-C Configuration Channel | Dual bidirectional CC pins with integrated Rp/Rd termination, dead-battery Rd, ESD protection, and hot-swap capability |
| SBU1, SBU2 | Sideband Use Channel | High-voltage-tolerant (to VBUS) pins routed through integrated 4×2 analog mux for DP/TBT alternate mode selection |
| VCONN_1, VCONN_2 | VCONN Power Switch Outputs | Drives EMCA cable VCONN via internal FETs; each supports 1.5 W with dedicated OCP |
| CSP, CSN | High-Side Current Sense Inputs | Differential inputs for external 10-mΩ shunt to enable programmable VBUS overcurrent detection |
| VBUS_DET | VBUS Monitoring Input | Analog input for VBUS voltage sensing; used with internal ADC for UVP/OVP threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB-PD PHY | Full BMC/4b/5b encoder-decoder with SOP detection, CRC, and collision avoidance-eliminates need for external PD PHY IC |
| DRP Support with Dead-Battery Mode | Hardware-enabled Rd termination on CC pins during power-off state ensures charging initiation even with 0-V system battery |
| Programmable VBUS Protection | Firmware-configurable OVP/UVP/OCP thresholds allow dynamic adaptation to varying power source profiles without hardware change |
| USB 2.0 & Alternate Mode Muxing | On-die 2×2 HS switch routes D+/D− based on plug orientation; 4×2 SBU crossbar enables seamless DP/TBT mode negotiation |
| Charger Detection Logic | Integrated BC 1.2 and Apple charging emulation/detection block reduces BOM count and simplifies legacy adapter compatibility |
Applications
| PC Notebook Docking Station | Thunderbolt-Compatible Host Port |
|---|---|
|
Use Scenario: A compact docking station providing USB-C host connectivity, video output, and power delivery to laptops. IC Role / Device Role / Timing Role: Primary USB Type-C port controller managing PD negotiation, role swap, VCONN power, and SBU routing for DisplayPort Alt Mode. Use Value: Enables single-cable docking with 100-W power delivery, 4K video, and data-all managed by one integrated controller without external PHY or mux ICs. |
Use Scenario: Thunderbolt 3/4 host controller implementing USB-C connector logic with backward compatibility to non-Thunderbolt devices. IC Role / Device Role / Timing Role: Handles CC-based plug orientation detection, DRP role arbitration, and SBU signal routing for Thunderbolt lane configuration. Use Value: Supports native Thunderbolt alternate mode handshaking while maintaining interoperability with standard USB-C peripherals and chargers. |
| Non-Thunderbolt Peripheral Hub | USB-C Charging Adapter Controller |
|
Use Scenario: Multi-port USB-C hub for monitors, storage, and peripherals requiring robust PD policy enforcement and legacy charging support. IC Role / Device Role / Timing Role: Manages simultaneous PD contract negotiation, BC 1.2/Apple charger detection, and USB 2.0 data path switching. Use Value: Delivers universal compatibility across Windows, macOS, and Android hosts while ensuring safe, fast charging for diverse mobile devices. |
Use Scenario: Wall-mounted USB-C power adapter that negotiates variable voltage (5 V/9 V/15 V/20 V) and current profiles with connected devices. IC Role / Device Role / Timing Role: Acts as fixed-source DFP with programmable Rp current, VBUS regulation feedback, and overvoltage/overcurrent fault response. Use Value: Eliminates need for discrete PD controller + MCU + protection IC combination-reducing footprint and firmware development effort. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB Type-C port controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STUSB4500QTR | Standalone USB-PD 3.0 sink-only controller; no embedded MCU, no flash, no VCONN FETs, no SBU/USB2.0 mux | Limited to fixed-sink applications (e.g., power banks); cannot support DRP, FRS, or alternate modes | Select when only basic PD sink functionality is required and system MCU handles policy engine |
| TUSB8041A | USB 3.1 Gen 1 hub controller with integrated Type-C mux; lacks PD controller, CC PHY, and VBUS protection blocks | Designed for data-only hubs; requires external PD controller (e.g., CCG3/CCG6) for full USB-C power management | Select when high-speed USB 3.1 data aggregation is primary requirement and PD is handled separately |
Compared with STUSB4500QTR and TUSB8041A, the CYPD5126-40LQXIT uniquely integrates full PD 3.0 policy engine, Arm Cortex-M0, VCONN FETs, and analog muxes-making it suitable for self-contained, single-chip USB-C port control in resource-constrained embedded systems.
Availability
CYPD5126-40LQXIT is available at Aetrix Electronics and suitable for PC notebook docking stations, Thunderbolt host ports, non-Thunderbolt peripheral hubs, and USB-C charging adapters requiring stable component supply, industrial temperature operation, and long-term lifecycle support.
Supply support for CYPD5126-40LQXIT 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 EZ-PD™ portfolio. Infineon is a global semiconductor leader focused on power systems, automotive, and industrial applications.
The CYPD5126-40LQXIT belongs to Infineon's EZ-PD™ CCG5C product line, designed specifically for single-port USB Type-C and Power Delivery 3.0 implementation in space-constrained, cost-sensitive client devices such as notebooks, docks, and adapters.
FAQ
Does CYPD5126-40LQXIT support USB Power Delivery 3.0 Extended Messages?
Yes. The device fully supports USB PD 3.0 Extended Messages up to 260 bytes using a chunking mechanism compatible with PD 2.0 receivers. Message segmentation is handled automatically by firmware, ensuring interoperability with legacy PD 2.0 devices while enabling richer data exchange with PD 3.0-compliant partners.
Can CYPD5126-40LQXIT operate without an external crystal or oscillator?
Yes. It integrates a precision internal oscillator eliminating the need for external clock components. This oscillator meets USB-PD timing requirements for BMC decoding and CC communication, reducing BOM count and PCB area while maintaining ±1.5% frequency accuracy across temperature and voltage ranges.
What is the maximum VBUS voltage the CYPD5126-40LQXIT can withstand on CC and SBU pins?
The CC1, CC2, SBU1, and SBU2 pins are rated for continuous operation up to 24 V relative to ground, protecting against accidental shorts to VBUS (up to 21.5 V). This high-voltage tolerance is implemented via internal clamping circuitry and does not require external TVS diodes for basic short-circuit robustness.
Is the CYPD5126-40LQXIT qualified for industrial temperature operation?
Yes. It is specified for operation from –40 °C to +85 °C ambient temperature and is packaged in a thermally enhanced 40-pin QFN with exposed pad. The device undergoes full characterization across this range, including flash retention, SRAM stability, and USB-PD timing margins, meeting industrial-grade reliability requirements.
CYPD5126-40LQXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- -
- Core Processor:
- -
- Program Memory Type:
- -
- Controller Series:
- -
- RAM Size:
- -
- Interface:
- -
- Number of I/O:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
CYPD5126-40LQXIT FAQ
1.How can I place an order for CYPD5126-40LQXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYPD5126-40LQXIT 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 CYPD5126-40LQXIT reliable?
The price and inventory of CYPD5126-40LQXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPD5126-40LQXIT is usually 5 days.
3.What payment methods are accepted for CYPD5126-40LQXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPD5126-40LQXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYPD5126-40LQXIT?
CYPD5126-40LQXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYPD5126-40LQXIT 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 CYPD5126-40LQXIT?
For technical support, including CYPD5126-40LQXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPD5126-40LQXIT requirements.
6.How does Aetrix verify that CYPD5126-40LQXIT is sourced from the original manufacturer or authorized distributors?
All CYPD5126-40LQXIT 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 CYPD5126-40LQXIT meets industry standards.
7.What is the process for return or replacement of CYPD5126-40LQXIT?
All CYPD5126-40LQXIT units undergo pre-shipment inspection (PSI). If there is an issue with CYPD5126-40LQXIT, 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 CYPD5126-40LQXIT part is unused and in its original packaging.
Return procedure for CYPD5126-40LQXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CYPD5126-40LQXIT Tags
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