Infineon Technologies CY8C4145AZI-PS433

Overview

CY8C4145AZI-PS433 from Infineon is a PSoC™ 4100PS programmable system-on-chip based on Arm® Cortex®-M0+ CPU, integrating 32 KB flash, 4 KB SRAM, dual ADCs (12-bit SAR + 10-bit single-slope), CAPSENSE™ capacitive sensing, and three configurable serial communication blocks (SCB) for I²C/SPI/UART. It operates from 1.71 V to 5.5 V and supports Deep-Sleep mode with 2.5 µA digital current-used in industrial HMI touch panels requiring low-power, high-SNR capacitive sensing and mixed-signal control.

For engineers reviewing the CY8C4145AZI-PS433 datasheet, CY8C4145AZI-PS433 pinout, CY8C4145AZI-PS433 application, or CY8C4145AZI-PS433 equivalent, this page delivers verified technical context, package mapping to 48-pin QFN, confirmed analog/digital peripheral specs, CAPSENSE™ hardware tuning capability, and validated alternative MCUs for reconfigurable embedded designs.

Technical Context

The device implements a 32-bit Arm® Cortex®-M0+ core running at up to 48 MHz, paired with an eight-channel descriptor-based DMA controller and automatic routing between programmable analog (CTB, VDAC, IDAC, opamps) and digital (TCPWM, SCB) blocks. Its clock system includes IMO (internal main oscillator), ILO (internal low-speed), and WCO (watch crystal oscillator) sources supporting precise timing across sleep/wake transitions.

CAPSENSE™ uses fourth-generation Sigma-Delta (CSD) modulation with SmartSense™ auto-tuning, delivering >100 dB SNR and robust water tolerance. Analog front-end configuration leverages a 38-channel analog mux, two 13-bit VDACs, and two 7-bit IDACs-enabling sensor signal conditioning and drive on any GPIO without external components.

Key Specifications

Pinout & Package

This device is packaged in a 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions support mixed-signal routing, including dedicated analog inputs/outputs, SCB signal pairs, CAPSENSE™ shield and sense lines, and programmable drive-strength GPIOs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C4145AZI-PS433, CY8C4146AZI-PS433 offers scalable memory without architectural change, while STM32G071KBT6 trades PSoC™'s hardware-reconfigurable analog/digital fabric for higher clock speed and memory-but demands additional BOM components and firmware effort for touch and AFE functions.

Availability

CY8C4145AZI-PS433 is available at Aetrix Electronics and suitable for industrial HMI touch panels, smart sensor nodes, medical patient monitors, and home appliance control boards requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.

Supply support for CY8C4145AZI-PS433 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 manufacturer specializing in power management, automotive ICs, and programmable embedded systems, with global R&D and manufacturing infrastructure.

The PSoC™ 4100PS product line targets cost-sensitive, low-power embedded applications requiring integrated analog, digital, and capacitive sensing capabilities-designed to reduce BOM count and accelerate development of human-interface and sensor-edge devices.

FAQ

What is the maximum operating frequency of the Arm® Cortex®-M0+ core in CY8C4145AZI-PS433?

The CY8C4145AZI-PS433 supports a maximum CPU clock frequency of 48 MHz, achieved using the internal main oscillator (IMO) or external crystal sources. This frequency is fully supported across the full 1.71–5.5 V supply range and all temperature grades specified in the datasheet. The read accelerator improves instruction fetch efficiency, enabling consistent throughput even with flash-based code execution.

Does CY8C4145AZI-PS433 support hardware-based capacitive touch sensing without external components?

Yes. The device integrates fourth-generation CAPSENSE™ Sigma-Delta (CSD) hardware with SmartSense™ auto-tuning, enabling robust self-capacitive and mutual-capacitive touch sensing on any GPIO pin. No external RC networks, opamps, or dedicated touch controllers are required-only a simple overlay and ground plane per design guidelines.

Can the analog peripherals operate independently during Deep-Sleep mode?

Yes. In Deep-Sleep mode, the 12-bit SAR ADC, VDACs, IDACs, opamps, and CAPSENSE™ CSD block remain fully operational while the CPU and most digital peripherals are powered down. This enables continuous touch monitoring or analog sensor sampling at 2.5 µA total system current, with wake-up triggered by threshold-crossing or timer events.

How many serial communication interfaces can be simultaneously active on CY8C4145AZI-PS433?

Three serial communication blocks (SCBs) are physically present and can be simultaneously active-each independently configured as I²C master/slave, SPI master/slave, or UART TX/RX. All three support concurrent operation with independent clock domains, DMA-assisted transfers, and distinct interrupt vectors, enabling multi-protocol connectivity without resource contention.