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Infineon Technologies CYPD3125-40LQXIT
- Part No.:
- CYPD3125-40LQXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 40-UFQFN Exposed Pad
- Datasheet:
-
CYPD3125-40LQXIT.pdf
- Description:
- IC USB TYPE C CONTROL
- Quantity:
- Payment:
- Shipping:
Inventory:5,478
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Product details
Overview
CYPD3125-40LQXIT from Infineon Technologies (formerly Cypress) is a USB Type-C and Power Delivery 3.0 port controller IC with integrated ARM® Cortex®-M0 processor (48 MHz), 128-KB flash, 8-KB SRAM, dual VCONN FETs, two pairs of VBUS gate drivers, hardware crypto engine, full-speed USB device controller, and system-level ±8-kV contact ESD protection. It serves as the central PD protocol manager and physical-layer controller for single-port USB-C applications including power adapters, docking stations, and monitors.
For engineers reviewing the CYPD3125-40LQXIT datasheet, CYPD3125-40LQXIT pinout, CYPD3125-40LQXIT application, or CYPD3125-40LQXIT equivalent, key selection criteria include its integrated BMC transceiver with Fast Role Swap support, 20-V-tolerant VBUS regulation and OVP/OCP detection, configurable CC termination (RA/RP/RD), and industrial temperature range (–40 °C to +105 °C) operation in 40-QFN package.
Technical Context
The CYPD3125-40LQXIT implements a complete USB-PD 3.0 subsystem with dedicated BMC PHY, analog crossbar for DisplayPort AUX/SBU routing, HPD processor, and dual 8-bit SAR ADCs for VBUS current sensing and charger detection. Its USB-PD SS handles baseband signaling, 4b/5b encoding, and role negotiation without host MCU intervention.
It integrates two independent gate driver pairs (VBUS_P_CTRL/VBUS_C_CTRL) supporting both N- and P-channel external FETs, a 20-V LDO regulator (VBUS_C), programmable VCONN leakers, and hardware-based overvoltage/undervoltage and overcurrent protection with interrupt-driven automatic FET shutdown - enabling robust, autonomous port power control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0 @ 48 MHz - enables real-time PD protocol stack execution with low-latency BMC timing compliance. |
| Flash / SRAM | 128 KB flash / 8 KB SRAM - sufficient for certified PD 3.0 firmware, billboard class support, and field-upgradable secure boot images. |
| USB-PD Support | USB PD 3.0 + Fast Role Swap - allows bidirectional power direction reversal within ≤500 µs without host coordination. |
| ESD Protection | ±8 kV contact / ±15 kV air-gap on CC, SBU, DP/DM, VBUS - meets IEC61000-4-2 Level 4C for system-level robustness. |
| Operating Voltage | 2.7 V to 21.5 V supply range - supports wide-input DC-DC converters in universal power adapters and industrial docks. |
| Temperature Range | –40 °C to +105 °C - qualified for extended thermal environments in enclosed power bricks and embedded docking solutions. |
| Package | 40-pin QFN (6 × 6 mm, 0.5 mm pitch) - surface-mount compatible with automated assembly and thermal pad for power dissipation. |
Pinout & Package
Package: 40-pin QFN (6 × 6 mm, 0.5 mm pitch), exposed thermal pad, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDD | Digital core supply | 1.71–5.5 V input powering CPU, flash, SRAM, and digital peripherals; decoupling required per datasheet layout guidelines. |
| VDDIO | I/O supply | Independent 1.71–5.5 V rail enabling mixed-voltage signaling (e.g., 3.3 V GPIO interfacing with 1.8 V controllers). |
| CC1 / CC2 | Configuration Channel | Dual bidirectional BMC data lines for cable orientation detection, role negotiation, and PD message exchange. |
| VBUS_C | VBUS monitor/regulator output | 20-V-tolerant regulated output from internal LDO; feeds OVP/OCP circuitry and serves as reference for CSA. |
| VBUS_P_CTRL / VBUS_C_CTRL | Gate driver outputs | Two independent high-side/low-side driver pairs controlling external N/P-FETs for VBUS_P and VBUS_C switching paths. |
| V5V | VCONN power source | 5-V supply input for internal VCONN FETs; powers active cables via CC1/CC2 during UFP role or accessory mode. |
| SBU1 / SBU2 | Sideband use | Analog auxiliary pins routed via internal crossbar to support DisplayPort Alt Mode signaling or custom sideband protocols. |
| DP / DM | USB 2.0 differential pair | Full-speed USB 2.0 PHY interface for Billboard device enumeration and vendor-defined communication over USB. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated BMC Transceiver | Hardware-accelerated USB-PD baseband PHY with FRS transmit/detect - eliminates need for external transceiver and reduces BOM count. |
| Configurable CC Termination | On-die RA (for VCONN accessories), RP (DFP), RD (UFP) - enables single-firmware support across source/sink/cable roles without external resistors. |
| Hardware Crypto Engine | AES-128/256, SHA-1/SHA-2, CRC, PRNG - enables secure firmware authentication and trusted field updates without software overhead. |
| Programmable Gate Drivers | Two dual-output drivers configurable for N- or P-FETs - supports flexible VBUS architecture (e.g., buck-boost + linear regulator combos). |
| System-Level ESD Protection | ±8 kV contact ESD on CC, SBU, DP/DM, VBUS - removes need for discrete TVS diodes on critical USB-C signal paths. |
Applications
| USB-C Power Adapter | Docking Station |
|---|---|
|
Use Scenario: Universal AC/DC adapter delivering up to 100 W via USB-C PD with variable voltage profiles (5/9/15/20 V). IC Role / Device Role / Timing Role: Primary PD protocol controller managing sink/source negotiation, VBUS FET sequencing, and dead-battery detection. Use Value: Integrated OVP/OCP and 20-V LDO enable direct connection to high-voltage secondary-side rails without external regulators or protection ICs. |
Use Scenario: Multiport dock connecting laptop to HDMI, USB-A, Ethernet, and charging via single USB-C upstream port. IC Role / Device Role / Timing Role: Central USB-C port manager handling upstream/downstream role swap, DisplayPort Alt Mode handshaking, and VCONN power delivery to active cables. Use Value: Analog crossbar and HPD processor allow native DP hot-plug detection and AUX channel routing without FPGA or companion logic. |
| Monitor with USB-C Input | USB-C Dongle (HDMI/USB-A) |
|
Use Scenario: Display supporting USB-C video + power delivery (e.g., 65 W input while driving 4K@60 Hz). IC Role / Device Role / Timing Role: UFP-mode PD controller negotiating power draw, monitoring VBUS health, and enabling VCONN for certified cables. Use Value: Dead battery detection and hardware BMC ensure reliable power-up even when host system is fully discharged. |
Use Scenario: Compact dongle converting USB-C to HDMI + USB-A + 3.5 mm audio, powered solely from host port. IC Role / Device Role / Timing Role: Dual-role PD controller managing power sourcing (to USB-A peripherals) and sinking (from host) with dynamic role swap. Use Value: Four reconfigurable SCBs support simultaneous I²C (to HDMI bridge), UART (debug), and SPI (firmware update) without external bus expanders. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-C port controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STUSB4500QTR | Standalone USB-PD 3.0 PHY + MCU-less state machine; no ARM core, no flash, no USB device interface. | Limited to fixed-function PD sink/source roles; cannot run custom firmware or support Billboard class or secure updates. | Select when cost-sensitive, single-role applications require minimal BOM and no firmware customization. |
| TPS65987DHLR | TI USB-C PD controller with dual-core ARM M0+ (256 KB flash), integrated VBUS switches, but no VCONN FETs or hardware crypto. | Requires external VCONN power circuitry; lacks AES/SHA acceleration, limiting secure firmware update capability. | Select when higher flash capacity and dual-port scalability are needed, and external crypto co-processor is acceptable. |
Compared with STUSB4500QTR and TPS65987DHLR, CYPD3125-40LQXIT uniquely combines full PD 3.0 protocol stack execution, integrated VCONN FETs, hardware crypto, and USB Billboard support in a single 40-QFN package - making it optimal for firmware-upgradable, security-critical, single-port USB-C endpoints.
Availability
CYPD3125-40LQXIT is available at Aetrix Electronics and suitable for USB-C power adapters, docking stations, and monitor designs requiring stable component supply, long-term lifecycle support, and industrial-grade thermal performance.
Supply support for CYPD3125-40LQXIT 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, industrial, and USB-C connectivity solutions.
CYPD3125-40LQXIT belongs to the EZ-PD™ CCG3 product line, designed specifically for highly integrated, firmware-programmable USB Type-C port control in space-constrained, thermally demanding applications such as compact power adapters and embedded docks.
FAQ
Does CYPD3125-40LQXIT support USB Power Delivery 3.0 Programmable Power Supply (PPS)?
Yes, CYPD3125-40LQXIT supports USB PD 3.0 PPS through firmware implementation using its integrated BMC transceiver, dual 8-bit ADCs for precise VBUS voltage/current measurement, and hardware-controlled gate drivers. PPS functionality requires Infineon's EZ-PD Configuration Utility v3.0+ and compliant firmware version 3.4.0 or later.
Can CYPD3125-40LQXIT operate without an external crystal?
Yes. The device integrates a factory-trimmed IMO (Internal Main Oscillator) capable of 48 MHz operation with ±2% accuracy across temperature and voltage, eliminating the need for an external crystal. An external clock or crystal may be used only if tighter timing tolerance (<±0.1%) is required for specific USB-C timing margins.
What is the maximum continuous current rating for the integrated VCONN FETs?
The integrated VCONN FETs are rated for continuous 100 mA output per CC line (CC1 or CC2) at 5 V, with thermal derating above 70 °C ambient. They are designed to power standard USB-C active cables compliant with USB-IF VCONN specifications and must be used with appropriate current-limiting resistors per USB-C specification section 4.5.2.2.
Is SWD debug access available after secure firmware lock?
No. Once the Secure Boot Lock bit is programmed, SWD debug access is permanently disabled to prevent unauthorized firmware extraction or modification. Debug access remains available only in pre-lock development stages; Infineon recommends validating firmware thoroughly before enabling secure lock in production units.
CYPD3125-40LQXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- EZ-PD™ CCG3
- 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:
- 20
- 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)
CYPD3125-40LQXIT FAQ
1.How can I place an order for CYPD3125-40LQXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYPD3125-40LQXIT 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 CYPD3125-40LQXIT reliable?
The price and inventory of CYPD3125-40LQXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPD3125-40LQXIT is usually 5 days.
3.What payment methods are accepted for CYPD3125-40LQXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPD3125-40LQXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYPD3125-40LQXIT?
CYPD3125-40LQXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYPD3125-40LQXIT 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 CYPD3125-40LQXIT?
For technical support, including CYPD3125-40LQXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPD3125-40LQXIT requirements.
6.How does Aetrix verify that CYPD3125-40LQXIT is sourced from the original manufacturer or authorized distributors?
All CYPD3125-40LQXIT 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 CYPD3125-40LQXIT meets industry standards.
7.What is the process for return or replacement of CYPD3125-40LQXIT?
All CYPD3125-40LQXIT units undergo pre-shipment inspection (PSI). If there is an issue with CYPD3125-40LQXIT, 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 CYPD3125-40LQXIT part is unused and in its original packaging.
Return procedure for CYPD3125-40LQXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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