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Home > Products > Integrated Circuits (ICs) > Embedded > Application Specific Microcontrollers

Infineon Technologies CYPD5125-40LQXIT

Name: CYPD5125-40LQXIT
Brand: Infineon Technologies
SKU: CYPD5125-40LQXIT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CYPD5125-40LQXIT

Manufacturer:: Infineon Technologies

Category:: Application Specific Microcontrollers

Package:: 40-UFQFN Exposed Pad

Datasheet:: CYPD5125-40LQXIT.pdf

Description:: IC USB TYPE C CCG5 40QFN

Quantity:: RFQ Add To RFQ list

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Inventory:2,469

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Product details

Overview

CYPD5125-40LQXIT from Infineon Technologies (formerly Cypress) is a dual-port USB Type-C and Power Delivery 3.0 port controller with integrated Arm® Cortex®-M0 CPU, two full Type-C transceivers, VCONN FETs, high-voltage LDO (21.5 V), and 128-KB flash. It supports fast role swap, extended messaging, dead-battery termination, and operates across –40 °C to +85 °C in a 6.0 mm × 6.0 mm 40-pin QFN package. Used in notebook docks and Thunderbolt host systems for full PD negotiation and alternate mode routing.

For engineers reviewing the CYPD5125-40LQXIT datasheet, CYPD5125-40LQXIT pinout, CYPD5125-40LQXIT application, or CYPD5125-40LQXIT equivalent, key selection criteria include dual-port PD 3.0 compliance, integrated VCONN FETs, 48-MHz M0 core with 128-KB flash, high-voltage tolerant CC/SBU pins, and support for BC 1.2 and Apple charging detection on D± lines.

Technical Context

The device implements two independent USB-PD physical layers with BMC/4b5b encoding, collision-avoidance half-duplex communication, and programmable RP/RD termination for DFP/UFP/DRP roles. Each port integrates dedicated VCONN FETs (1.5 W), OCP on VCONN, and high-voltage protection on CC/SBU pins against accidental VBUS shorts.

It features a dual 2×2 analog mux (USB HS and SBU), 8-bit SAR ADC with 4-input analog mux, high-side current sense amplifier (10-mΩ sense resistor interface), and PFET gate drivers tolerant up to 21.5 V. DeepSleep mode enables FRS-triggered wake-up in notebook systems.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M0 @ 48 MHz - real-time PD protocol stack execution with SWD debug support
Flash / SRAM	128-KB flash + 12-KB SRAM - sufficient for dual-port PD firmware, USB PD 3.0 state machines, and custom policy engine
USB-PD Support	USB-PD 3.0 compliant with Fast Role Swap and Extended Messages (260-byte) - enables rapid power role reversal and vendor-defined data exchange
Port Count	Dual Type-C ports - each with integrated transceiver, RP/RD termination, VCONN FET, and VBUS OVP/OCP
Supply Range	2.75 V to 21.5 V operation - supports VSYS priority boot and direct VBUS_P1/P2 regulation via internal HV LDO
ESD Protection	±8-kV contact / ±15-kV air-gap on CC, D±, SBU - meets IEC61000-4-2 Level 4C without external protection components
Package	40-pin QFN (6.0 mm × 6.0 mm, 0.6 mm height) - industrial temperature range (–40 °C to +85 °C), NRND status noted in datasheet

Pinout & Package

Package: 40-pin QFN (6.0 mm × 6.0 mm, 0.6 mm height), exposed thermal pad, RoHS-compliant, industrial temperature grade (–40 °C to +85 °C).

Pin/Terminal	Circuit Role	Design Meaning
CC1 / CC2	Type-C Configuration Channel	Dual bidirectional BMC signaling lines with integrated RP/RD termination and HV protection - enable plug orientation detection and DRP role negotiation
VCONN_P1 / VCONN_P2	VCONN Power Switch Output	Integrated 1.5-W FET outputs per port - directly power EMCA cables without external MOSFETs or regulators
VBUS_P1 / VBUS_P2	High-Voltage Input Supply	Accepts 4–21.5 V input - feeds internal HV LDO and enables VBUS discharge FETs for PD detach timing compliance
VBUS_C_CTRL / VBUS_P_CTRL	External PFET Gate Driver	Voltage-tolerant (21.5 V) open-drain outputs - drive external high-side PFETs for VBUS sourcing/sinking control
CSP_P1/CSN_P1, CSP_P2/CSN_P2	Current Sense Inputs	Differential inputs for 10-mΩ shunt - enable high-side VBUS overcurrent detection with programmable threshold

Key Features

Feature	Design Value
Dual USB-PD 3.0 Subsystems	Independent PHYs with SOP/SOP'/SOP" detection, CRC, 4b5b encoding, and chunking for backward compatibility with PD 2.0 hosts
Integrated Analog Routing	2×2 USB HS mux + 2×2 SBU crossbar - dynamically routes DP/TB alternate mode signals and USB 2.0 D± based on CC orientation
Charger Detection	BC 1.2 and Apple charging emulation/detection on D± lines - enables legacy USB-A charger compatibility without external ICs
Dead-Battery Termination	RD resistors active before MCU boot - allows charging initiation even when system battery is fully depleted
DeepSleep + FRS Wake	Low-power state with CC line monitoring - wakes within microseconds upon Fast Role Swap request from upstream source

Applications

USB-C Docking Station

Notebook Host Controller

Use Scenario: Dual-port docking station connecting laptop to DisplayPort, USB 3.x, Ethernet, and power delivery.

IC Role / Device Role / Timing Role: Central USB-PD policy engine managing port power roles, alternate mode negotiation, and VCONN cable power.

Use Value: Eliminates need for discrete PD controllers, level shifters, and VCONN regulators - reduces BOM count by ≥7 components.

Use Scenario: Embedded Type-C controller in ultrabook motherboard enabling USB-C charging, display output, and data transfer.

IC Role / Device Role / Timing Role: System-level port manager coordinating with EC/firmware to handle hot-plug, orientation, and power contract updates.

Use Value: Supports DeepSleep + FRS for instant wake from battery-dead state - critical for OEM suspend/resume certification.

Thunderbolt™ 3 Host Interface

Multi-Function Peripheral Hub

Use Scenario: Thunderbolt 3 add-in card providing PCIe tunneling, DisplayPort alt mode, and 100-W PD delivery.

IC Role / Device Role / Timing Role: Alternate mode coordinator translating Thunderbolt link training signals into USB-PD structured VDMs.

Use Value: Integrated SBU crossbar and HS mux route AUX/DP lanes correctly regardless of plug orientation - no firmware reconfiguration needed.

Use Scenario: Industrial USB-C hub supporting simultaneous USB 2.0 peripherals, UART debugging, and battery charging.

IC Role / Device Role / Timing Role: Multi-role controller acting as DFP for downstream devices and UFP for upstream host, with dynamic role swap.

Use Value: On-chip charger detect blocks identify Apple/BC1.2 sources - enables correct voltage/current provisioning without host OS involvement.

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
CYPD5225-40LQXIT	Same die, higher-grade screening (automotive AEC-Q100 Grade 2), identical pinout and firmware compatibility	Required for automotive infotainment head units with extended temperature and reliability validation	Select when AEC-Q100 qualification and 10-year supply assurance are mandatory
CYPD5235-96BZXIT	96-ball BGA package, dual-port architecture, same feature set but supports higher I/O count and thermal dissipation	Suitable for high-density dock designs requiring additional GPIOs and enhanced thermal performance	Choose for space-constrained PCBs needing more routing flexibility and lower junction temperature

Compared with CYPD5125-40LQXIT, the CYPD5225 variant adds automotive qualification without functional change, while CYPD5235 offers identical functionality in a thermally superior BGA package - both retain full firmware and register-level compatibility.

Availability

CYPD5125-40LQXIT is available at Aetrix Electronics and suitable for USB-C docking stations, notebook host interfaces, and Thunderbolt 3 peripheral hubs requiring stable component supply, long-term lifecycle support, and industrial temperature operation.

Supply support for CYPD5125-40LQXIT 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 maintains the EZ-PD™ portfolio as part of its broad USB-C and power delivery solutions.

This device belongs to the EZ-PD™ CCG5 product line, designed specifically for single-chip dual-port USB Type-C and Power Delivery 3.0 control in space-constrained, thermally demanding client computing and docking applications.

FAQ

Is CYPD5125-40LQXIT pin-compatible with earlier CCG3 or CCG4 controllers?

No. CYPD5125-40LQXIT uses a 40-pin QFN footprint unique to the CCG5 family and is not pin-compatible with CCG3 (32-QFN) or CCG4 (40-QFN with different pin mapping). Migration requires PCB redesign and firmware adaptation due to architectural differences in USB-PD subsystems and memory layout.

Does this part support USB4 or Thunderbolt 4 protocols?

CYPD5125-40LQXIT does not implement USB4 or Thunderbolt 4 link layer logic. It supports USB-PD 3.0 and Type-C alternate mode handshaking required for Thunderbolt 3, but relies on an external Thunderbolt controller for PCIe tunneling and protocol translation.

What is the function of the "NRND" designation in the datasheet?

"NRND" (Not Recommended for New Designs) indicates Infineon advises new projects to consider CYPD5235-96BZXIT or CYPD5225-40LQXIT instead - primarily due to enhanced thermal performance or automotive qualification - though CYPD5125-40LQXIT remains fully supported and available for existing designs.

Can the integrated ADC measure VBUS voltage directly?

No. The 8-bit SAR ADC has inputs routed through the global analog mux bus, which excludes CC1/CC2 and VBUS pins. VBUS sensing must be performed externally using the high-side current sense amplifier (CSP/CSN) combined with known shunt resistance and firmware calculation.

CYPD5125-40LQXIT Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: EZ-PD™ CCG5

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:: 12K x 8

Interface:: I2C, SPI, UART/USART, USB

Number of I/O:: 28

Voltage - Supply:: 2.75V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 40-QFN (6x6)

CYPD5125-40LQXIT FAQ

1.How can I place an order for CYPD5125-40LQXIT through Aetrix?

Please submit a Request for Quotation (RFQ) for CYPD5125-40LQXIT 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 CYPD5125-40LQXIT reliable?

The price and inventory of CYPD5125-40LQXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPD5125-40LQXIT is usually 5 days.

3.What payment methods are accepted for CYPD5125-40LQXIT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPD5125-40LQXIT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CYPD5125-40LQXIT?

CYPD5125-40LQXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CYPD5125-40LQXIT 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 CYPD5125-40LQXIT?

For technical support, including CYPD5125-40LQXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPD5125-40LQXIT requirements.

6.How does Aetrix verify that CYPD5125-40LQXIT is sourced from the original manufacturer or authorized distributors?

All CYPD5125-40LQXIT 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 CYPD5125-40LQXIT meets industry standards.

7.What is the process for return or replacement of CYPD5125-40LQXIT?

All CYPD5125-40LQXIT units undergo pre-shipment inspection (PSI). If there is an issue with CYPD5125-40LQXIT, 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 CYPD5125-40LQXIT part is unused and in its original packaging.

Return procedure for CYPD5125-40LQXIT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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