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Infineon Technologies CYPD3121-40LQXIT
- Part No.:
- CYPD3121-40LQXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 40-UFQFN Exposed Pad
- Datasheet:
-
CYPD3121-40LQXIT.pdf
- Description:
- CCG3
- Quantity:
- Payment:
- Shipping:
Inventory:4,221
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Product details
Overview
CYPD3121-40LQXIT 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 power path controller in single-port USB-C applications including power adapters, docking stations, and monitors.
For engineers reviewing the CYPD3121-40LQXIT datasheet, CYPD3121-40LQXIT pinout, CYPD3121-40LQXIT application, or CYPD3121-40LQXIT equivalent, key selection criteria include its native BMC transceiver support, dead-battery detection capability, hardware-based OCP/OVP, configurable RA/RP/RD terminations, and industrial temperature range (–40 °C to +105 °C) compliance.
Technical Context
The CYPD3121-40LQXIT implements a complete USB-PD 3.0 subsystem with integrated BMC PHY supporting Fast Role Swap (FRS), analog crossbar for DisplayPort AUX/SBU routing, and HPD processor for DisplayPort sink/source control. Its USB-PD SS includes programmable OV/UV detectors, current sense amplifier with interrupt-driven overcurrent response, and discharge switch for VBUS_C.
It integrates four reconfigurable Serial Communication Blocks (SCBs) supporting I²C (up to 1 Mbps), SPI, or UART; four 16-bit TCPWM blocks; and a hardware crypto engine with AES, SHA-1/SHA-2, CRC, and PRNG acceleration - all tightly coupled to the Cortex-M0 core via AHB-Lite interconnect and clock-gated for low-power operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0 @ 48 MHz - enables deterministic USB-PD timing response and firmware upgradability within tight protocol deadlines. |
| Flash / SRAM | 128 KB flash / 8 KB SRAM - sufficient for full USB-PD 3.0 stack, Billboard class firmware, and vendor-specific policy engine. |
| USB-PD Transceiver | Integrated BMC PHY with FRS support - eliminates external transceiver, reduces BOM count, and enables bidirectional role swap under 200 ms. |
| VCONN Supply | Dual integrated 5-V-tolerant FETs - directly powers USB-C cables without external switches or regulators. |
| VBUS Control | Two independent dual-output gate drivers - supports N- or P-channel external VBUS FETs with programmable slew rate and fault shutdown. |
| ESD Protection | ±8 kV contact / ±15 kV air-gap on CC, SBU, DP/DM, VBUS - meets IEC61000-4-2 Level 4C without external TVS diodes. |
| Operating Voltage | 2.7 V to 21.5 V input - accommodates wide-range DC-DC outputs in adapters and docks while enabling dead-battery wake-up. |
Pinout & Package
CYPD3121-40LQXIT 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 |
|---|---|---|
| CC1 / CC2 | Configuration Channel I/O | Dual bidirectional BMC data lines with integrated termination resistors (RA/RP/RD) and ESD clamps. |
| VBUS_C / VBUS_P | VBUS Monitoring & Control | Separate inputs for VBUS charge path (VBUS_C) and pass-through path (VBUS_P); each routed to dedicated OV/UV and CSA blocks. |
| V5V | VCONN Power Source | 5-V supply input for internal VCONN FETs; drives CC1/CC2 when cable requires VCONN power. |
| SBU1 / SBU2 | Sideband Use Interface | Analog pins routed through internal crossbar to AUX_P/AUX_N - enables DisplayPort Alt Mode signaling without external mux. |
| DP / DM | USB 2.0 Differential Pair | Full-speed USB 2.0 PHY interface with integrated 5-V-to-3.3-V regulator; supports Billboard device enumeration. |
| GPIO[0:19] | Configurable I/O | 20 general-purpose pins supporting SCB, PWM, ADC, or digital I/O; GPIO voltage range: 1.71 V to 5.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Crypto Engine | AES-128/256, SHA-1/SHA-256, CRC-32, and PRNG acceleration - enables secure firmware authentication and trusted field updates without CPU overhead. |
| Integrated Billboard Device | Full-speed USB 2.0 device controller preconfigured for USB Billboard Class - reports USB-C connection errors (e.g., "Unsupported Configuration") to host OS without custom driver. |
| Programmable Termination | On-die RA (for VCONN accessories), RP (DFP), RD (UFP) - eliminates external resistor networks and enables dynamic role switching in firmware. |
| Dead-Battery Detection | Internal LDO and wake logic active below 2.7 V - allows port negotiation and VCONN power delivery even when system battery is fully depleted. |
| Thermal & Electrical Robustness | Rated for –40 °C to +105 °C ambient; 20-V-tolerant regulator and gate drivers - supports high-voltage adapter designs without level-shifting. |
Applications
| USB-C Power Adapter | Docking Station |
|---|---|
|
Use Scenario: Compact 65-W GaN adapter negotiating 20 V / 3.25 A PD contract while maintaining <100-ms FRS latency during source-sink reversal. IC Role / Device Role / Timing Role: Primary PD protocol controller managing BMC framing, policy engine execution, and VBUS gate driver sequencing. Use Value: Integrated VCONN FETs and dual gate drivers reduce component count by ≥5 discrete parts; hardware OVP/OCP enables fail-safe shutdown within 2 µs. |
Use Scenario: Multiport dock supporting simultaneous USB-C video (DP Alt Mode), USB 3.1 Gen 2 data, and 100-W charging with independent port power management. IC Role / Device Role / Timing Role: Central USB-C port manager coordinating HPD assertion, AUX/SBU routing via analog crossbar, and per-port PD negotiation. Use Value: On-chip analog crossbar eliminates external DP MUX IC; SCB-configurable I²C interfaces enable direct communication with display and MCU subsystems. |
| Notebook Embedded Port | USB-C Monitor |
|
Use Scenario: Thin-and-light laptop with embedded CCG3 managing upstream UFP role, BC1.2 charger detection, and system wake-on-CC event. IC Role / Device Role / Timing Role: Embedded Type-C controller handling dead-battery boot, VCONN sourcing, and fast-role-swap initiation upon host command. Use Value: Deep Sleep current of 30 µA extends battery life during port idle; SWD debug interface enables in-system firmware update without disassembly. |
Use Scenario: 4K monitor with USB-C upstream input delivering video, audio, USB HID, and 60-W power to connected laptop. IC Role / Device Role / Timing Role: DFP controller managing DisplayPort HPD handshake, USB Billboard error reporting, and VBUS discharge during disconnect. Use Value: Integrated Billboard class eliminates need for separate USB microcontroller; VBUS_C discharge switch ensures safe hot-unplug per USB-C spec. |
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 transceiver (no MCU, no flash, no crypto); requires external microcontroller for policy engine. | Lacks integrated firmware stack and Billboard support - necessitates custom firmware development and additional BOM cost. | Select when minimal footprint and lowest unit cost are prioritized over time-to-market and security features. |
| TUSB8041RJER | USB 3.1 Gen 1 hub controller with basic Type-C detection only; no PD protocol support, no BMC transceiver, no VBUS control. | Cannot negotiate PD contracts or manage VBUS power path - limited to data-only Type-C connectivity. | Select only for non-PD USB-C data hubs where power negotiation is handled externally. |
Compared with STUSB4500QTR and TUSB8041RJER, CYPD3121-40LQXIT delivers full turnkey PD 3.0 functionality - including policy engine, BMC transceiver, VBUS gate drivers, and secure firmware update - reducing design cycle time by ≥12 weeks and eliminating at least three external components.
Availability
CYPD3121-40LQXIT is available at Aetrix Electronics and suitable for USB-C power adapters, docking stations, notebook embedded ports, and USB-C monitors requiring stable component supply across extended product lifecycles.
Supply support for CYPD3121-40LQXIT 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 solutions with vertical integration from silicon to system-level IP.
CYPD3121-40LQXIT belongs to the EZ-PD™ CCG3 product line, designed specifically to deliver single-chip USB Type-C and Power Delivery 3.0 port control for space-constrained, high-reliability consumer and industrial endpoints.
FAQ
Does CYPD3121-40LQXIT support USB Power Delivery 3.0 Programmable Power Supply (PPS)?
Yes. CYPD3121-40LQXIT supports USB PD 3.0 PPS through firmware implementation using its integrated BMC transceiver, 48-MHz Cortex-M0, and real-time ADC monitoring. PPS voltage step resolution (20 mV) and current step resolution (50 mA) are enforced in the reference firmware stack provided by Infineon, and the hardware supports sub-100-µs loop response required for PPS regulation.
Can CYPD3121-40LQXIT 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. This oscillator is used for USB FS timing and PD BMC clocking; optional external crystal support is not implemented in this variant.
What is the maximum continuous current rating for the integrated VCONN FETs?
The integrated VCONN FETs are rated for continuous 200 mA output per channel (CC1 or CC2) with thermal derating above 70 °C ambient. Each FET includes overtemperature shutdown and is qualified for 10,000 connect/disconnect cycles per Infineon reliability testing (JESD22-A108).
Is SWD debugging supported in production firmware images?
Yes. SWD interface remains accessible in all firmware states - including bootloader, application, and deep sleep - using the dedicated SWDIO and SWCLK pins. Debug access can be locked via flash protection bits, but the physical interface remains enabled unless explicitly disabled in hardware configuration fuses.
CYPD3121-40LQXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- EZ-PD™ CCG3
- Package/Case:
- 40-UFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
CYPD3121-40LQXIT FAQ
1.How can I place an order for CYPD3121-40LQXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYPD3121-40LQXIT 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 CYPD3121-40LQXIT reliable?
The price and inventory of CYPD3121-40LQXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPD3121-40LQXIT is usually 5 days.
3.What payment methods are accepted for CYPD3121-40LQXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPD3121-40LQXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYPD3121-40LQXIT?
CYPD3121-40LQXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYPD3121-40LQXIT 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 CYPD3121-40LQXIT?
For technical support, including CYPD3121-40LQXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPD3121-40LQXIT requirements.
6.How does Aetrix verify that CYPD3121-40LQXIT is sourced from the original manufacturer or authorized distributors?
All CYPD3121-40LQXIT 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 CYPD3121-40LQXIT meets industry standards.
7.What is the process for return or replacement of CYPD3121-40LQXIT?
All CYPD3121-40LQXIT units undergo pre-shipment inspection (PSI). If there is an issue with CYPD3121-40LQXIT, 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 CYPD3121-40LQXIT part is unused and in its original packaging.
Return procedure for CYPD3121-40LQXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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