Infineon Technologies CY8C4145LQI-PS433

Overview

CY8C4145LQI-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™ sigma-delta 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, targeting embedded human-interface and sensor-fusion applications in industrial HMI and smart appliances.

For engineers reviewing the CY8C4145LQI-PS433 datasheet, CY8C4145LQI-PS433 pinout, CY8C4145LQI-PS433 application, or CY8C4145LQI-PS433 equivalent, key selection criteria include its integrated CAPSENSE™ CSD engine with SmartSense™ auto-tuning, 38 GPIOs with Smart I/O Boolean logic, and runtime-reconfigurable analog/digital peripherals enabling rapid AFE and protocol stack prototyping without external components.

Technical Context

The device implements a tightly coupled mixed-signal architecture where the Arm® Cortex®-M0+ core (up to 48 MHz) directly controls reconfigurable analog blocks-including two CTB opamps, four programmable gain amplifiers, and dual 13-bit VDACs-and digital resources including eight TCPWM blocks with center-aligned PWM and pseudo-random modulation modes.

Its clock system integrates IMO (internal main oscillator), ILO (internal low-speed oscillator), and WCO (watch crystal oscillator) with automatic failover, while the CAPSENSE™ subsystem uses dedicated sigma-delta modulators with hardware-accelerated baseline tracking and noise rejection-enabling >100:1 SNR in wet-touch environments without firmware intervention.

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 are validated per Infineon datasheet 002-22097 Rev. *F, Section 3 "Pinouts".

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C4245LTI-483, the CY8C4145LQI-PS433 offers superior thermal dissipation in space-constrained designs; versus CY8C4146LQI-PS433, it trades flash/SRAM headroom for lower unit cost and reduced power in resource-tight edge nodes.

Availability

CY8C4145LQI-PS433 is available at Aetrix Electronics and suitable for industrial HMI panels, smart appliance control, medical patient monitors, and IoT sensor nodes requiring stable component supply across multi-year production cycles.

Supply support for CY8C4145LQI-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 AG is a German semiconductor manufacturer specializing in power management, automotive MCUs, and secure connectivity solutions, with global R&D centers and ISO/TS 16949-certified wafer fabs.

This part belongs to the PSoC™ 4100PS product line-designed specifically for cost-sensitive, mixed-signal embedded systems requiring integrated capacitive sensing, analog front-end flexibility, and Arm®-based firmware scalability without external component dependencies.

FAQ

What development tools are required to program CY8C4145LQI-PS433?

PSoC™ Creator IDE (free Windows-based tool) is the primary development environment, providing schematic capture, automatic routing, and API-driven firmware generation. Programming and debug use standard ARM Serial Wire Debug (SWD) via MiniProg3 or KitProg2 programmers-no JTAG adapter needed. Component-specific APIs for CAPSENSE™, TCPWM, and SCB are pre-integrated and validated.

Does CY8C4145LQI-PS433 support USB connectivity?

No, this device lacks native USB PHY or USB controller hardware. Communication is limited to the three configurable SCB peripherals supporting I²C, SPI, and UART protocols. For USB-to-UART bridge functionality, an external CP2102N or similar transceiver must be used-CY8C4145LQI-PS433 can manage the UART side but cannot enumerate as a USB device.

Can CAPSENSE™ operate during Deep-Sleep mode?

Yes-CAPSENSE™ CSD hardware remains active in Deep-Sleep mode using the WCO clock source, consuming <1.5 µA total. Touch scanning continues autonomously, and the device wakes the CPU only upon valid button press or slider movement, preserving full analog functionality without SRAM retention loss.

What is the maximum operating temperature rating for this QFN package?

The CY8C4145LQI-PS433 is rated for industrial temperature range: –40 °C to +85 °C ambient. The 48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) features an exposed thermal pad that must be soldered to a minimum 100 mm² copper pour for reliable thermal conduction at full 48 MHz operation in enclosed enclosures.