Infineon Technologies CY8C4146AXI-S443

Overview

CY8C4146AXI-S443 from Cypress Semiconductor is a PSoC 4100S Plus programmable system-on-chip featuring a 48-MHz Arm Cortex-M0+ CPU, 128 KB flash, 16 KB SRAM, integrated CapSense sigma-delta capacitive sensing, CAN 2.0B interface, and 54 GPIOs in a 44-pin TQFP package. It delivers mixed-signal reconfigurability for embedded control with deep-sleep operation at 2.5 µA and on-chip analog blocks including two opamps and a 12-bit 1-Msps SAR ADC.

For engineers reviewing the CY8C4146AXI-S443 datasheet, CY8C4146AXI-S443 pinout, CY8C4146AXI-S443 application, or CY8C4146AXI-S443 equivalent, key selection criteria include its integrated CAN 2.0B block with TTCAN support, CapSense SNR >5:1, Deep Sleep analog retention, programmable SCBs (I²C/SPI/UART), and TCPWM-based motor control timing with comparator-triggered kill signals.

Technical Context

The device integrates an Arm Cortex-M0+ core with tightly coupled flash (two wait states at 48 MHz) and zero-wait-state 16 KB SRAM, supported by an 8-channel DMA engine and SWD debug interface with four breakpoint comparators. Clocking includes IMO (±2%), ILO (32 kHz), WCO, ECO (4–33 MHz), and PLL for precise 48-MHz generation.

Analog subsystem comprises two rail-to-rail opamps (operable in Deep Sleep), a 12-bit SAR ADC with channel sequencer and signal averaging, two low-power comparators, and a capacitance-sensing block enabling 10-bit sigma-delta conversion. Digital resources include five reconfigurable SCBs, eight TCPWM blocks (supporting center-aligned PWM and quadrature decoding), and programmable logic blocks for Boolean operations on GPIOs.

Key Specifications

Pinout & Package

Package: 44-pin TQFP (0.8 mm pitch), RoHS-compliant, body size 10 × 10 mm, thermal pad not included.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable mixed-signal MCU applications.

Compared with CY8C4147AZI-S475 and STM32F072CBT6, CY8C4146AXI-S443 uniquely balances compact 44-pin packaging, production-ready CapSense, CAN-TTCAN, and sub-3-µA Deep Sleep analog operation-making it optimal for space-constrained, touch-integrated industrial nodes.

Availability

CY8C4146AXI-S443 is available at Aetrix Electronics and suitable for industrial HMI panels, automotive body control modules, and smart home sensor hubs requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across manufacturing lots.

Supply support for CY8C4146AXI-S443 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

Cypress Semiconductor (now part of Infineon Technologies) designs programmable mixed-signal ICs for embedded systems, emphasizing flexibility, low power, and system integration.

The PSoC 4100S Plus product line targets cost-sensitive, touch-enabled industrial and automotive applications requiring reconfigurable analog/digital peripherals, secure firmware execution, and deterministic real-time control-all in a single chip.

FAQ

Does CY8C4146AXI-S443 support hardware-based AES encryption?

No. The device does not include a dedicated AES accelerator. It features a True Random Number Generator (TRNG) for secure key derivation and supports software-based cryptographic libraries, but symmetric encryption must be implemented in firmware using the Cortex-M0+ core. For hardware-accelerated crypto, consider PSoC 6-series devices.

Can the CapSense block operate independently during Deep Sleep mode?

Yes. The CapSense sigma-delta (CSD) block remains fully functional in Deep Sleep mode with only 2.5 µA system current. It can autonomously scan electrodes, detect touches, and generate interrupts to wake the CPU-enabling true "always-on" touch interfaces without compromising battery life.

What is the maximum operating frequency of the CAN peripheral?

The CAN 2.0B block supports bit rates up to 1 Mbps under standard conditions. Timing is derived from the HFCLK (48 MHz) with programmable prescalers and segment timing registers. TTCAN synchronization accuracy depends on WCO or ECO stability; use of the 32-kHz WCO enables ±50 ppm jitter control for time-triggered scheduling.

Is external flash required for firmware updates over CAN?

No. The device's 128 KB on-chip flash supports dual-bank operation and includes a bootloadable project framework in PSoC Creator. Firmware updates can be received over CAN and written directly to flash using the provided bootloader API-no external memory is needed for field upgrades.