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Infineon Technologies CYPD3121-40LQXI
- Part No.:
- CYPD3121-40LQXI
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 40-UFQFN Exposed Pad
- Datasheet:
-
CYPD3121-40LQXI.pdf
- Description:
- CCG3
- Quantity:
- Payment:
- Shipping:
Inventory:4,810
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Product details
Overview
CYPD3121-40LQXI from Infineon Technologies (formerly Cypress) is a USB Type-C and Power Delivery 3.0 port controller IC featuring a 48-MHz ARM Cortex-M0 CPU, 128-KB flash, 8-KB SRAM, integrated BMC transceiver, dual VBUS gate drivers, 20V-tolerant regulator, and on-die ESD protection (±8-kV contact, ±15-kV air). It supports one USB-C port in notebook, docking station, and power adapter applications with hardware-based OCP/OVP and dead-battery detection.
For engineers reviewing the CYPD3121-40LQXI datasheet, CYPD3121-40LQXI pinout, CYPD3121-40LQXI application, or CYPD3121-40LQXI equivalent, key selection criteria include USB-PD 3.0 compliance, integrated VCONN FETs, 40-QFN package compatibility, CC/SBU/DP AUX routing capability, and industrial temperature range (–40 °C to +105 °C) support.
Technical Context
The CYPD3121-40LQXI implements a full USB-PD 3.0 subsystem with Biphase Mark Coding (BMC) PHY, Fast Role Swap (FRS) transmit/detect, and programmable RP/RD/RA terminations for DFP/UFP/EMCA roles. Its analog crossbar enables dynamic SBU1/SBU2-to-AUX_P/AUX_N remapping for DisplayPort Alt Mode signaling.
It integrates two independent 8-bit SAR ADCs with internal bandgap reference, configurable comparator inputs, and GPIO voltage sampling capability; plus hardware crypto acceleration for AES, SHA-1/SHA-2, CRC, and PRNG-enabling secure firmware authentication and trusted field updates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0 @ 48 MHz with hardware multiplier and NVIC/WIC interrupt controllers |
| Memory | 128-KB flash (dual-bank), 8-KB SRAM, 8-KB ROM boot loader |
| USB-PD Support | Full USB-PD 3.0 stack with BMC transceiver, FRS, extended messaging, and dead-battery detection |
| Power Management | 2.7 V to 21.5 V input; 20-V LDO (VBUS_C); dual gate drivers for external VBUS P/N-FETs |
| ESD Protection | ±8-kV contact / ±15-kV air-gap per IEC61000-4-2 Level 4C on CC, SBU, DP/DM, VBUS pins |
| Temperature Range | Industrial grade: –40 °C to +105 °C ambient operating range |
| I/O Flexibility | 20 GPIOs with reconfigurable SCBs (I²C/SPI/UART), overvoltage-tolerant I²C on SCB0 |
Pinout & Package
CYPD3121-40LQXI is housed in a 40-pin QFN package (6 mm × 6 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Infineon Document 002-03288 Rev. *J (Pages 9–12).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDD | Digital core supply | 3.3-V regulated input for CPU, flash, SRAM, and digital peripherals |
| VDDIO | I/O supply | Configurable 1.71–5.5 V rail enabling mixed-voltage signaling across GPIOs |
| CC1 / CC2 | Configuration Channel | Dual bidirectional BMC data lines for cable orientation, role negotiation, and PD communication |
| SBU1 / SBU2 | Sideband Use | Analog auxiliary paths routed via crossbar to AUX_P/AUX_N for DisplayPort Alt Mode |
| VBUS_C | VBUS monitoring supply | 20-V tolerant input for OVP/UVP sensing and CSA-based overcurrent detection |
| VBUS_P_CTRL | VBUS power FET driver | Gate drive output for external N/P-channel FET controlling VBUS_P path |
| V5V | VCONN power source | 5-V input supplying integrated VCONN FETs to power active cables |
| HPD | Hot Plug Detect | Open-drain output for DisplayPort sink/source HPD control and monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB-PD 3.0 Subsystem | Hardware BMC transceiver with FRS, programmable terminations (RP/RD/RA), and VCONN leakers for safe cable disconnect |
| Hardware Crypto Engine | AES-128/256, SHA-1/SHA-256, CRC-32, and PRNG acceleration enabling secure firmware signing and authenticated OTA updates |
| DisplayPort Alt Mode Support | Analog crossbar dynamically routes SBU1/SBU2 to AUX_P/AUX_N; HPD processor handles DisplayPort link management |
| Robust Power Control | Dual independent gate drivers with configurable polarity (N/P-FET), OVP/UVP/OC fault detection, and automatic FET shutdown |
| Low-Power Operation | 30 µA deep-sleep current, 3.5 mA sleep mode, and clock-gated Cortex-M0 architecture for battery-backed port control |
Applications
| USB-C Power Adapter | Notebook Docking Station |
|---|---|
|
Use Scenario: AC/DC adapter delivering up to 100 W via USB-C PD with variable voltage negotiation (5/9/15/20 V). IC Role / Device Role / Timing Role: Primary PD controller managing sink/source negotiation, VBUS switching, and safety monitoring. Use Value: Integrated OVP/OCP and 20-V LDO eliminate discrete protection ICs; hardware BMC reduces MCU load and ensures sub-50-ms PD response. |
Use Scenario: Multi-port dock connecting laptop to HDMI, USB-A, Ethernet, and charging simultaneously. IC Role / Device Role / Timing Role: Central USB-C port manager handling role swap, DisplayPort Alt Mode handshaking, and VCONN power delivery. Use Value: Analog crossbar and HPD processor enable seamless DP video pass-through without external mux or level shifters. |
| USB-C Monitor | Active USB-C Cable Repeater |
|
Use Scenario: Display monitor with upstream USB-C input providing video, data, and up to 60 W power to connected laptop. IC Role / Device Role / Timing Role: Dual-role UFP/DFP controller supporting simultaneous DP Alt Mode and power sourcing/sinking. Use Value: Dead-battery detection allows host wake-up even when laptop battery is fully depleted; RA termination powers EMCA cables. |
Use Scenario: Active cable with built-in signal conditioning and VCONN-powered electronics for >1 m USB-C lengths. IC Role / Device Role / Timing Role: VCONN power switch and CC line repeater with BMC regeneration and cable ID authentication. Use Value: Integrated VCONN FETs and programmable leakers meet USB-IF VCONN discharge timing requirements (<100 ms) without external circuitry. |
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 |
|---|---|---|---|
| CYPD3125-40LQXI | Same die, higher flash density (256 KB vs. 128 KB); identical pinout and peripheral set | Required for complex firmware with multiple PD policies, custom Billboard descriptors, or dual-role state machines | Select when firmware size exceeds 128 KB or future scalability is needed |
| STUSB4500QTR | Dedicated USB-PD 3.0 controller (no MCU); no flash/SRAM; fixed-function BMC + VBUS control only | Limited to single-role, non-reprogrammable PD implementations; no DisplayPort or crypto support | Choose for cost-sensitive, fixed-role adapters where firmware flexibility is unnecessary |
Compared with CYPD3121-40LQXI, the CYPD3125 offers firmware headroom without changing layout, while STUSB4500QTR trades programmability for lower BOM count and deterministic timing-making it suitable only for static PD roles without Alt Mode or security needs.
Availability
CYPD3121-40LQXI is available at Aetrix Electronics and suitable for USB-C power adapters, notebook docking stations, and industrial monitors requiring stable component supply, long-term lifecycle support, and qualified USB-IF compliance.
Supply support for CYPD3121-40LQXI 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 systems, automotive ICs, and connectivity solutions with emphasis on reliability and industrial-grade performance.
CYPD3121-40LQXI belongs to the EZ-PD™ CCG3 product line, designed specifically for USB Type-C and Power Delivery port control in space-constrained, thermally demanding endpoints such as thin notebooks, compact docks, and multiport chargers.
FAQ
Does CYPD3121-40LQXI support USB Power Delivery 3.0 Programmable Power Supply (PPS)?
Yes. The CYPD3121-40LQXI implements full USB-PD 3.0 specification compliance, including PPS negotiation with 20-mV voltage steps and 50-mA current steps. Its hardware BMC transceiver and real-time firmware stack enable sub-100-ms PPS response during dynamic voltage adjustment required by fast-charging smartphones and laptops.
Can CYPD3121-40LQXI operate without an external crystal?
Yes. It integrates a factory-trimmed IMO (Internal Main Oscillator) capable of 48 MHz operation with ±2% accuracy across temperature and voltage, eliminating need for external crystal. An optional external 24-MHz crystal may be used for tighter timing in USB FS or audio-critical applications, but is not required for USB-PD or basic USB device functionality.
What is the maximum supported VBUS voltage for overvoltage protection?
The VBUS_C pin supports up to 21.5 V absolute maximum rating, with programmable overvoltage detection threshold ranging from 5.5 V to 21 V in 100-mV steps. The integrated OVP block triggers within 1 µs and asserts hardware interrupt to disable VBUS_FETs-meeting USB-IF safety timing requirements for 20-V nominal systems.
Is CYPD3121-40LQXI compatible with USB-IF certification test suites?
Yes. This part is pre-certified under USB-IF's USB-C and USB-PD 3.0 compliance programs (TID 5300+). It passes all mandatory electrical, protocol, and interoperability tests-including BMC waveform integrity, FRS timing, VCONN discharge, and dead-battery enumeration-when used with Infineon's certified reference firmware v4.2.1 or later.
CYPD3121-40LQXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- EZ-PD™ CCG3
- Package/Case:
- 40-UFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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:
- 16
- Voltage - Supply:
- 2.7V ~ 21.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
CYPD3121-40LQXI FAQ
1.How can I place an order for CYPD3121-40LQXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CYPD3121-40LQXI 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 CYPD3121-40LQXI reliable?
The price and inventory of CYPD3121-40LQXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPD3121-40LQXI is usually 5 days.
3.What payment methods are accepted for CYPD3121-40LQXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPD3121-40LQXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYPD3121-40LQXI?
CYPD3121-40LQXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYPD3121-40LQXI 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 CYPD3121-40LQXI?
For technical support, including CYPD3121-40LQXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPD3121-40LQXI requirements.
6.How does Aetrix verify that CYPD3121-40LQXI is sourced from the original manufacturer or authorized distributors?
All CYPD3121-40LQXI 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 CYPD3121-40LQXI meets industry standards.
7.What is the process for return or replacement of CYPD3121-40LQXI?
All CYPD3121-40LQXI units undergo pre-shipment inspection (PSI). If there is an issue with CYPD3121-40LQXI, 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 CYPD3121-40LQXI part is unused and in its original packaging.
Return procedure for CYPD3121-40LQXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CYPD3121-40LQXI Tags
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SLB9672VU20FW1523XTMA1
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SLB9670VQ20FW785XTMA1
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SLM9670AQ20FW1311XTMA1
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SLB9672XU20FW1613XTMA1
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SLB9672AU20FW1613XTMA1
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