Infineon Technologies CY8C4146LQE-S243

Overview

CY8C4146LQE-S243 from Infineon is an AEC-Q100 Grade-S (–40°C to +105°C) automotive-grade PSoC™ 4100S Plus microcontroller featuring a 48-MHz Arm® Cortex®-M0+ CPU, 128 KB flash, 16 KB SRAM, and integrated CAPSENSE™ capacitive sensing with SmartSense auto-tuning. It includes five reconfigurable serial communication blocks (I²C/SPI/UART/LIN), a CAN 2.0B controller with TTCAN support, and eight 16-bit TCPWM blocks - deployed in automotive body control modules for touch-enabled door handles and climate panels.

For engineers reviewing the CY8C4146LQE-S243 datasheet, CY8C4146LQE-S243 pinout, CY8C4146LQE-S243 application, or CY8C4146LQE-S243 equivalent, key selection criteria include its AEC-Q100 qualification, Deep Sleep current of 2.5 µA with operational analog, 12-bit 1-Msps SAR ADC with sequencer, CAN 2.0B + TTCAN capability, and 54 GPIO with programmable drive strength and CAPSENSE™ on any pin.

Technical Context

The device integrates a dual-domain clock system with ±2% IMO, 32-kHz ILO/WCO, and 4–33 MHz ECO feeding a PLL for precise 48-MHz core timing. Its analog subsystem includes two opamps supporting high-drive external mode and ADC input buffering, plus two low-power comparators that remain active in Deep Sleep.

Digital flexibility is enabled by Smart I/O logic blocks for Boolean port-level operations and eight TCPWM units supporting center-aligned PWM, quadrature decoding, and comparator-triggered kill signals - critical for motor control safety in automotive HVAC actuators and seat position systems.

Key Specifications

Pinout & Package

Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced with exposed pad for automotive thermal reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C4147LQE-S443, this part trades flash/SRAM headroom for cost-sensitive volume deployment; versus SPC560B50L5, it delivers full-system integration (touch + analog + digital + CAN) in one die, reducing component count and layout complexity in compact automotive modules.

Availability

CY8C4146LQE-S243 is available at Aetrix Electronics and suitable for automotive door modules, climate control panels, seat position controllers, and body control unit gateways requiring stable component supply across extended temperature ranges and AEC-Q100 compliance.

Supply support for CY8C4146LQE-S243 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 AG is a German semiconductor manufacturer specializing in power management, automotive MCUs, and security solutions, with global manufacturing and automotive qualification infrastructure.

This device belongs to the PSoC™ 4100S Plus product line - engineered specifically for automotive human-machine interface (HMI) and body electronics applications requiring integrated capacitive sensing, low-power operation, and functional safety-ready peripherals.

FAQ

What is the maximum operating frequency of the Arm® Cortex®-M0+ core in CY8C4146LQE-S243?

The core runs at up to 48 MHz, generated by the internal PLL locked to either the 4–33 MHz external crystal oscillator (ECO) or the ±2% internal main oscillator (IMO). This frequency is fully supported across the full Grade-S temperature range (–40°C to +105°C) and maintains timing compliance for CAN bit rates up to 1 Mbps and TCPWM resolution down to 20.8 ns.

Does CY8C4146LQE-S243 support hardware-based true random number generation?

Yes, it includes a dedicated True Random Number Generator (TRNG) module compliant with NIST SP 800-90B entropy standards. The TRNG feeds cryptographically secure keys to the on-chip hardware accelerator for AES-128 encryption, enabling secure bootloader authentication and firmware signature verification without external security elements.

Can all 54 GPIO pins be used simultaneously for CAPSENSE™ sensing?

No - while all 54 pins are CAPSENSE™-capable, simultaneous use is constrained by the underlying CSD hardware resources: up to 32 sensors (electrodes) can be scanned concurrently using the shared sigma-delta modulator and IDACs. Pin allocation must observe mutual capacitance scan group limits defined in the PSoC™ Creator Component Datasheet for CAPSENSE™ CSD v4.x.

Is external flash memory required to run ModusToolbox™ applications on this device?

No - ModusToolbox™ applications execute directly from the on-chip 128 KB flash. The Read Accelerator optimizes instruction fetch latency, and the 16 KB SRAM provides sufficient space for stack, heap, and middleware buffers (e.g., CAPSENSE™ tuning data, CAN message buffers, and FreeRTOS kernel objects) without external memory dependency.