Infineon Technologies CY8C4A45LQI-483

Overview

CY8C4A45LQI-483 from Infineon Technologies (formerly Cypress) is a programmable System-on-Chip (PSoC) Analog Coprocessor integrating a 32-bit Arm® Cortex™-M0+ CPU (48 MHz), 32 KB flash, 4 KB SRAM, dual ADCs (12-bit SAR + 10-bit single-slope), and configurable analog blocks including a Universal Analog Block (UAB) for filter/ADC/DAC functions. It supports CapSense® capacitive sensing with SmartSense™ auto-tuning and operates from 1.71 V to 5.5 V in Deep-Sleep mode with 2.5 µA system current. Used in sensor aggregation nodes for industrial condition monitoring.

For engineers reviewing the CY8C4A45LQI-483 datasheet, CY8C4A45LQI-483 pinout, CY8C4A45LQI-483 application, or CY8C4A45LQI-483 equivalent, key selection criteria include its integrated analog front-end reconfigurability, dual ADC architecture with simultaneous sampling capability, Deep-Sleep analog retention, CapSense SNR performance, and QFN-48 package compatibility with Arduino-shield form factor development boards.

Technical Context

The device implements a hierarchical clock system with IMO (Internal Main Oscillator), WCO (Watch Crystal Oscillator), and ILO (Internal Low-Speed Oscillator), enabling precise timing control across power modes. Its analog subsystem includes two independent opamps, two low-power comparators, a 38-channel analog mux, and a UAB configurable as second-order switched-capacitor filter, 12-bit incremental ΔΣ ADC, or dual 13-bit voltage DACs.

Digital peripherals comprise three SCBs supporting runtime-configurable I²C/SPI/UART, eight 16-bit TCPWM blocks with center-aligned/PWM modes, and an 8-channel descriptor-based DMA controller. The GPIO subsystem delivers 38 pins with programmable drive strength, slew rate, and Smart I/O Boolean logic per pin - all operable in Deep-Sleep with analog retention.

Key Specifications

Pinout & Package

48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. Pinout validated per CY8C4Axx Family Datasheet Rev. *J, pages 10–12.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable analog coprocessor applications.

Compared with STM32G474RET6 and MAX32660, CY8C4A45LQI-483 uniquely combines reconfigurable analog hardware, production-ready CapSense, and Deep-Sleep analog retention - reducing total BOM cost by up to 30% and eliminating firmware tuning effort for touch and sensor signal chains.

Availability

CY8C4A45LQI-483 is available at Aetrix Electronics and suitable for industrial sensor nodes, capacitive touch HMI systems, portable gas detectors, and smart energy meters requiring stable component supply across multi-year production cycles.

Supply support for CY8C4A45LQI-483 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 global semiconductor leader headquartered in Munich, Germany, delivering power systems, microcontrollers, sensors, and security solutions for automotive, industrial, and IoT applications.

CY8C4Axx is part of Infineon's PSoC Analog Coprocessor product line, designed specifically to offload analog-intensive tasks from host MCUs in multi-sensor edge devices while maintaining ultra-low power consumption and field-upgradable firmware.

FAQ

What debug interface does CY8C4A45LQI-483 support?

CY8C4A45LQI-483 uses Arm Serial Wire Debug (SWD) with two-wire connectivity (SWDIO and SWCLK). It supports full-chip programming, real-time tracing, and breakpoint/watchpoint debugging without external pods. Four address comparators and two data watchpoints are implemented in silicon, and debug features can be permanently disabled via flash protection for secure deployment.

Does CY8C4A45LQI-483 support simultaneous sampling across its ADCs?

Yes - the 12-bit SAR ADC and 10-bit single-slope ADC operate independently with separate trigger sources and result registers. Their conversion start signals can be synchronized via hardware triggers from TCPWM or SCB peripherals, enabling true simultaneous sampling for phase-sensitive measurements like motor current/voltage analysis.

Can the UAB be used as both a filter and ADC at the same time?

No - the Universal Analog Block (UAB) is a single reconfigurable resource that must be assigned one function per instance: either a second-order switched-capacitor filter, a 12-bit incremental Delta-Sigma ADC, or two 13-bit voltage DACs. It cannot perform multiple functions concurrently, though other analog resources (SAR ADC, opamps) operate in parallel.

What is the maximum operating temperature for CY8C4A45LQI-483 in industrial applications?

CY8C4A45LQI-483 is rated for industrial temperature range: –40 °C to +85 °C ambient. This is validated per the CY8C4Axx Family Datasheet Rev. *J, Section "Absolute Maximum Ratings" and "Device Level Specifications", and applies across all power modes including Deep-Sleep with analog retention enabled.