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Infineon Technologies CYPD4126-40LQXIT
- Part No.:
- CYPD4126-40LQXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 40-UFQFN Exposed Pad
- Datasheet:
-
CYPD4126-40LQXIT.pdf
- Description:
- CCG4
- Quantity:
- Payment:
- Shipping:
Inventory:2,399
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Product details
Overview
CYPD4126-40LQXIT from Infineon is a dual-port USB Type-C and Power Delivery 3.0 port controller IC featuring a 48-MHz Arm® Cortex®-M0 CPU, 128 KB flash, two integrated BMC transceivers, ±8-kV CC-pin ESD protection, and integrated VCONN FETs - deployed in notebook host ports, AC/DC power adapters, and docking stations for full PD role negotiation and cable management.
For engineers reviewing the CYPD4126-40LQXIT datasheet, CYPD4126-40LQXIT pinout, CYPD4126-40LQXIT application, or CYPD4126-40LQXIT equivalent, key selection criteria include dual-port PD 3.0 compliance, integrated RP/RD termination, fast role swap support, VCONN power capability, and industrial temperature range (–40°C to +105°C) operation.
Technical Context
The CYPD4126-40LQXIT implements two independent USB-PD Baseband PHY/MAC subsystems with integrated BMC encoding/decoding, supporting simultaneous Source/Sink/DRP operation on both ports. It integrates dedicated current sources (RP) and pull-down resistors (RD) per port, plus dead-battery termination logic enabling power-up from 0 V.
Its MCU subsystem uses an Arm® Cortex®-M0 core with hardware multiplier, NVIC, SWD debug interface, and 8 KB SRAM - tightly coupled to a flash accelerator delivering near-SRAM access performance. Four reconfigurable SCBs support I²C/SPI/UART for system-side communication and firmware updates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0, 48 MHz - enables deterministic USB-PD protocol timing and firmware-based policy engine execution. |
| Flash Memory | 128 KB - stores full USB-PD 3.0 stack, vendor-specific policies, and field-upgradable firmware. |
| SRAM | 8 KB - buffers PD message exchange, CC state tracking, and real-time port control variables. |
| USB-PD Support | PD 3.0 compliant (BMC physical layer, structured VDM, Fast Role Swap, Extended Messaging) - enables USB-C ecosystem interoperability including alternate modes and vendor-defined messages. |
| CC Pin ESD | ±8 kV contact / ±15 kV air-gap (IEC61000-4-2 Level 4C) - protects configuration channel pins against real-world electrostatic discharge during cable insertion. |
| Operating Temp | –40°C to +105°C - supports deployment in thermally demanding environments like enclosed power adapters and industrial docking stations. |
| VCONN Drive | Integrated dual 2× VCONN FETs - powers electronically marked cables (EMCA) without external MOSFETs or gate drivers. |
Pinout & Package
Package: 40-pin QFN (6.0 mm × 6.0 mm, 0.6 mm pitch), RoHS-compliant, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CC1, CC2 | Configuration Channel (Port 0) | Detect plug orientation, negotiate power role (UFP/DFP/DRP), and initiate PD communication via BMC signaling. |
| CC3, CC4 | Configuration Channel (Port 1) | Independent dual-port CC interface - enables simultaneous negotiation on two Type-C ports without multiplexing. |
| VCONN1, VCONN2 | VCONN Power Outputs | Drive 5 V to EMCA cable electronics; each controlled by internal FET with current limiting and fault detection. |
| VBUS1, VBUS2 | Port Power Monitoring Inputs | Analog inputs for VBUS voltage sensing - used for sink/source detection, overvoltage protection, and PD contract validation. |
| SCL0, SDA0 | I²C Interface (Port 0) | Connects to host microcontroller or PMIC for policy coordination, status reporting, and firmware update commands. |
| SCB1–SCB4 | Reconfigurable Serial Interfaces | Four serial blocks configurable as UART/SPI/I²C - support debug, host comms, and peripheral bridging without pin duplication. |
Key Features
| Feature | Design Value |
|---|---|
| Dual USB-PD BMC Transceivers | Two fully independent physical layers eliminate need for external transceivers or signal conditioning - reduces BOM count and layout complexity. |
| Integrated RP/RD Termination | On-die 5.1 kΩ RD (UFP) and programmable current-source RP (DFP) - removes four external resistors per port and ensures precise USB-IF compliance. |
| Fast Role Swap (FRS) | Hardware-accelerated FRS response < 200 µs - enables seamless transition between power source and sink roles during dynamic power delivery scenarios. |
| Hot-Swappable CC Pins | CC1/CC2/CC3/CC4 tolerate live insertion/removal - prevents latch-up or damage when cables are connected during system operation. |
| Deep Sleep Current | 2.5 µA - maintains CC line monitoring and wake-on-event capability while minimizing standby power in battery-backed systems. |
Applications
| Notebook Host Port | USB-C Power Adapter |
|---|---|
Use Scenario: Dual USB-C port implementation on ultrabook chassis with DRP capability and DisplayPort Alt Mode support. IC Role / Device Role / Timing Role: Primary Type-C port controller managing CC negotiation, VBUS control, VCONN power, and PD messaging for both upstream and downstream roles. Use Value: Enables single-chip dual-port DRP operation with hardware-accelerated Fast Role Swap - critical for user-initiated power direction reversal without OS intervention. | Use Scenario: Compact 65 W GaN-based AC/DC adapter with programmable output voltage (5–20 V) and multi-device charging. IC Role / Device Role / Timing Role: Standalone PD policy engine and BMC transceiver - negotiates voltage/current contracts, monitors VBUS, and controls primary-side PWM controller via I²C. Use Value: Integrated 128 KB flash stores multiple PD profiles and safety-critical firmware - eliminates external memory and supports field updates for new device compatibility. |
| Docking Station Hub | Industrial USB-C Dock |
Use Scenario: Multiport Thunderbolt/USB-C dock with video, data, and up to 100 W power delivery to laptop. IC Role / Device Role / Timing Role: Central port manager coordinating PD contracts across upstream (laptop) and downstream (peripherals) ports while handling VCONN routing. Use Value: Dual independent transceivers and four SCBs enable concurrent PD negotiation, display alt-mode handshaking, and host MCU telemetry - avoiding protocol contention. | Use Scenario: Ruggedized docking station for factory-floor automation equipment requiring extended temperature operation and ESD resilience. IC Role / Device Role / Timing Role: Robust port controller with –40°C to +105°C rating and ±8 kV CC-pin ESD - ensures reliable hot-plug operation in electrically noisy industrial environments. Use Value: On-die termination and integrated VCONN FETs reduce component count and PCB area - improving MTBF and simplifying conformal coating requirements. |
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 |
|---|---|---|---|
| CYPD4226-40LQXIT | Same die, pre-programmed with Infineon's standard notebook reference firmware; identical pinout and electrical specs. | Targeted for OEMs requiring turnkey notebook port control without custom firmware development. | Select when firmware customization is unnecessary and time-to-market prioritizes validated reference design integration. |
| TPS65988DHK | Texas Instruments part with integrated buck-boost regulator; lacks Arm® M0 MCU, relies on host processor for policy decisions. | Requires external host MCU for PD stack execution; better suited for systems with existing processing resources. | Select when system already includes a capable host processor and power regulation integration is preferred over standalone port control. |
Compared with CYPD4226-40LQXIT, this part offers full firmware flexibility; versus TPS65988DHK, it provides self-contained PD policy execution and eliminates host dependency - making it optimal for resource-constrained or MCU-less adapter/dock designs.
Availability
CYPD4126-40LQXIT is available at Aetrix Electronics and suitable for notebook host ports, USB-C power adapters, and industrial docking stations requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for CYPD4126-40LQXIT 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 is a German semiconductor leader specializing in power management, automotive MCUs, and connectivity solutions, with broad industrial and consumer market reach.
The EZ-PD™ CCG4 product line delivers highly integrated, firmware-programmable USB-C port controllers targeting compact, thermally constrained, and safety-certifiable applications such as adapters, notebooks, and docks.
FAQ
Does CYPD4126-40LQXIT support USB Power Delivery 3.0 Extended Messages?
Yes, CYPD4126-40LQXIT fully supports USB PD 3.0 Extended Message framework including Vendor Defined Messages (VDMs), Status, and Alert messages. Its dual BMC transceivers and dedicated message buffers enable concurrent structured VDM exchange on both ports without host MCU intervention.
What is the function of the integrated VCONN FETs?
The CYPD4126-40LQXIT integrates two pairs of VCONN FETs - one per port - to supply regulated 5 V to electronically marked cables (EMCA). Each FET includes current limiting, thermal shutdown, and fault reporting via GPIO, eliminating need for discrete VCONN power circuitry.
Can this device operate without an external crystal?
Yes. The device includes a factory-trimmed internal main oscillator (IMO) running at 48 MHz, sufficient for full USB-PD 3.0 timing compliance. An external crystal is optional and only required if tighter frequency accuracy (< ±100 ppm) is needed for specific USB-IF certification test cases.
Is CYPD4126-40LQXIT compatible with the EZ-PD™ Configuration Utility?
Yes - the Infineon EZ-PD™ Configuration Utility (v3.4+) supports CYPD4126-40LQXIT for parameter configuration, firmware flashing, and runtime debugging via SWD or I²C. It enables full customization of PD policies, GPIO mappings, and port behaviors without modifying底层 firmware source code.
CYPD4126-40LQXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- EZ-PD™ CCG4
- Package/Case:
- 40-UFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- USB Type C
- Core Processor:
- ARM® Cortex®-M0
- Program Memory Type:
- FLASH (128kB)
- Controller Series:
- -
- RAM Size:
- 8K x 8
- Interface:
- I2C, SPI, UART/USART, USB
- Number of I/O:
- 14
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
CYPD4126-40LQXIT FAQ
1.How can I place an order for CYPD4126-40LQXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYPD4126-40LQXIT 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 CYPD4126-40LQXIT reliable?
The price and inventory of CYPD4126-40LQXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPD4126-40LQXIT is usually 5 days.
3.What payment methods are accepted for CYPD4126-40LQXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPD4126-40LQXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYPD4126-40LQXIT?
CYPD4126-40LQXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYPD4126-40LQXIT 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 CYPD4126-40LQXIT?
For technical support, including CYPD4126-40LQXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPD4126-40LQXIT requirements.
6.How does Aetrix verify that CYPD4126-40LQXIT is sourced from the original manufacturer or authorized distributors?
All CYPD4126-40LQXIT 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 CYPD4126-40LQXIT meets industry standards.
7.What is the process for return or replacement of CYPD4126-40LQXIT?
All CYPD4126-40LQXIT units undergo pre-shipment inspection (PSI). If there is an issue with CYPD4126-40LQXIT, 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 CYPD4126-40LQXIT part is unused and in its original packaging.
Return procedure for CYPD4126-40LQXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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