Infineon Technologies CY8C4025LQA-S411

Overview

CY8C4025LQA-S411 from Infineon Technologies (acquired Cypress Semiconductor) is an AEC-Q100 qualified 32-bit automotive microcontroller based on the ARM Cortex-M0+ core, operating at up to 48 MHz. It integrates programmable analog (2× low-power comparators, 2× IDACs), digital logic (Smart I/O, 5× TCPWM), CapSense® capacitive sensing, and dual reconfigurable SCB peripherals (I²C/SPI/UART) in a 24-pin QFN package. Used in automotive body electronics for touch-enabled control panels requiring deep-sleep operation at 2.5 µA.

For engineers reviewing the CY8C4025LQA-S411 datasheet, CY8C4025LQA-S411 pinout, CY8C4025LQA-S411 application, or CY8C4025LQA-S411 equivalent, key selection criteria include AEC-Q100 Grade S (−40 °C to +105 °C), Deep Sleep current ≤2.5 µA with active analog, CapSense SNR >5:1, and SWD debug interface compatibility with ARM-standard tools.

Technical Context

The device implements a single-layer AHB-Lite interconnect between CPU, flash (32 KB with read accelerator), SRAM (4 KB), and peripherals. Its clock system combines a trimmed 24–48 MHz IMO, 40-kHz ILO, and 32-kHz WCO, with eight programmable dividers-including two fractional-enabling precise UART baud rates and synchronized peripheral timing.

Analog functionality is routed via dual amux buses connecting IDACs and comparators to any GPIO; digital logic is implemented through Smart I/O LUTs and five independent 16-bit TCPWM blocks supporting center-aligned PWM, kill-signal triggering, and dead-band generation for motor control.

Key Specifications

Pinout & Package

Package: 24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), thermally enhanced with exposed pad. Pinout validated per Cypress datasheet 002-18381 Rev. *D, Figure 7 (Page 7).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive microcontroller applications.

Compared with SPC560B50L5 and RA4M2, CY8C4025LQA-S411 uniquely delivers AEC-Q100-compliant CapSense, ultra-low Deep Sleep current, and programmable analog/digital fabric in a compact QFN-making it optimal for space-constrained, touch-centric automotive body electronics where mixed-signal flexibility matters more than raw CPU performance.

Availability

CY8C4025LQA-S411 is available at Aetrix Electronics and suitable for automotive body electronics, touch-based human-machine interfaces, and embedded control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY8C4025LQA-S411 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 now manufactures and supports the PSoC® family. Infineon is a global semiconductor leader focused on power systems, automotive electronics, and secure connectivity solutions.

This device belongs to the PSoC 4000S product line, designed specifically for cost-optimized, AEC-Q100-compliant automotive applications requiring integrated capacitive sensing, low-power operation, and field-programmable analog/digital resources.

FAQ

What is the maximum operating frequency and voltage range for CY8C4025LQA-S411?

The CY8C4025LQA-S411 operates at up to 48 MHz with a supply voltage range of 1.71 V to 5.5 V. This wide voltage range supports direct interfacing with common automotive power domains (e.g., 3.3 V or 5 V rails) without external regulators. The 48 MHz clock is derived from the internally trimmed IMO oscillator, calibrated to ±2% accuracy across temperature and voltage.

Does CY8C4025LQA-S411 support hardware-accelerated capacitive sensing?

Yes, it integrates Cypress CapSense Sigma-Delta (CSD) hardware with dedicated scan engines, delivering >5:1 signal-to-noise ratio and built-in water tolerance. The SmartSense™ auto-tuning algorithm runs in firmware and adjusts sensing parameters dynamically-eliminating manual calibration during production and enabling robust operation in humid or wet environments like door handles or dashboards.

How many independent communication interfaces does CY8C4025LQA-S411 provide?

The device includes two fully reconfigurable Serial Communication Blocks (SCBs), each supporting I²C, SPI, or UART protocols independently at runtime. Both SCBs operate concurrently, allowing simultaneous communication-for example, I²C with a temperature sensor and UART with a display controller-without CPU overhead or resource contention.

Is CY8C4025LQA-S411 qualified for automotive use, and what grade does it meet?

Yes, CY8C4025LQA-S411 is AEC-Q100 qualified at Grade S (−40 °C to +105 °C), making it suitable for under-dash and cabin-mounted automotive applications. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD-ensuring reliability in harsh vehicle environments without derating.