Infineon Technologies CYPD6127-48LQXIT

Overview

CYPD6127-48LQXIT from Infineon is a single-port USB Type-C and Power Delivery (PD) 3.0 port controller with integrated Arm® Cortex®-M0 MCU (48 MHz, 64-KB flash, 96-KB ROM), VBUS provider load switch (5 V/3 A), TRNG for authentication, and full CC/SBU/DP/DM analog mux support. It serves as the primary PD policy engine and physical layer controller in notebook USB-C ports.

For engineers reviewing the CYPD6127-48LQXIT datasheet, CYPD6127-48LQXIT pinout, CYPD6127-48LQXIT application, or CYPD6127-48LQXIT equivalent, this device is selected for its integrated dead-battery Rd termination, slew-rate-controlled VBUS gate driver, hardware-based FRS response, and 21.5-V high-voltage LDO enabling operation during system power loss.

Technical Context

The CYPD6127-48LQXIT implements a complete USB PD 3.0 subsystem with BMC physical layer, integrated Rp/Rd termination, VCONN FETs, and SBU pass-through switch with VBUS short-circuit protection. Its dual-role CC line handling supports both DFP and UFP configurations without external resistors.

It integrates a 48-MHz Cortex-M0 with dedicated TCPWM timers and four reconfigurable SCBs (I²C/SPI/UART), enabling real-time PD messaging, policy engine execution, and host interface communication - all within a single 48-pin QFN package optimized for space-constrained notebook front-panel designs.

Key Specifications

Pinout & Package

Package: 48-pin QFN (6.0 mm × 6.0 mm × 0.6 mm, 0.4-mm pitch), thermally enhanced with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB Type-C port controller applications.

Compared with CYPD6127-48LQXIT, the CCG6DF variant offers dual-port scalability at the cost of larger footprint and external VBUS switching, while TPS65988DHAR trades MCU flexibility for turnkey firmware - making CYPD6127-48LQXIT optimal for custom PD policy, compact single-port designs, and dead-battery operation.

Availability

CYPD6127-48LQXIT is available at Aetrix Electronics and suitable for notebook USB-C port control, Thunderbolt host PD management, and USB-C monitor power negotiation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CYPD6127-48LQXIT 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 USB-C/PD solutions, with global manufacturing and automotive-grade quality certification.

CYPD6127 is part of Infineon's EZ-PD™ CCG6SF product line - designed specifically for single-port, space-constrained USB-C endpoint devices requiring integrated PD 3.0 policy enforcement, dead-battery operation, and minimal external components.

FAQ

Does CYPD6127-48LQXIT support USB PD 3.1 Extended Power Range (EPR)?

No. CYPD6127-48LQXIT implements USB PD 3.0 specification only. It does not support EPR voltage levels (28 V/36 V/48 V) or associated communication protocols. Its VBUS provider switch is rated for 5 V/3 A, and its protection circuitry is designed for ≤21.5 V operation - consistent with PD 3.0's 20-V maximum.

Can the internal VBUS load switch be disabled to use an external switch instead?

Yes. The internal VBUS provider switch is controlled via firmware-configurable registers. Setting the appropriate bit in the VBUS_CTRL register disables the internal switch and enables the VBUS_C gate driver output to control an external N-channel FET - allowing flexible power path design for higher-current or multi-rail applications.

What is the purpose of the 96-KB ROM, and is it user-accessible?

The 96-KB ROM contains Infineon's certified USB PD 3.0 stack, bootloader, cryptographic libraries, and hardware abstraction layer. It is read-only and not user-programmable; however, it is executed directly by the Cortex-M0 and serves as the immutable foundation for secure firmware updates and runtime PD messaging - ensuring compliance without exposing critical protocol logic to modification.

How does the dead-battery Rd termination function without VSYS power?

The 21.5-V high-voltage LDO draws power directly from VBUS (4–21.5 V) to supply the CC termination circuitry and BMC transceiver. This allows Rd pull-down activation and CC line detection even when VSYS is 0 V - enabling laptop charging negotiation and accessory enumeration before system power-on, a requirement for USB-C compliance in portable endpoints.