Infineon Technologies CY8C4A45AZI-483

Overview

CY8C4A45AZI-483 from Infineon Technologies (formerly Cypress) is a programmable 32-bit Arm® Cortex™-M0+ analog coprocessor with 32 KB flash, 4 KB SRAM, and integrated analog front-end including dual ADCs (12-bit SAR + 10-bit single-slope), universal analog block (UAB), four opamps, two low-power comparators, and CapSense® sigma-delta capacitive sensing. It operates from 1.71–5.5 V and supports Deep-Sleep mode at 2.5 µA while maintaining analog functionality - used in sensor hub subsystems for industrial condition monitoring and smart home environmental sensors.

For engineers reviewing the CY8C4A45AZI-483 datasheet, CY8C4A45AZI-483 pinout, CY8C4A45AZI-483 application, or CY8C4A45AZI-483 equivalent, key selection criteria include its reconfigurable analog blocks, hardware-accelerated CapSense with SmartSense™ tuning, 48-pin QFN package compatibility, and support for concurrent analog signal preprocessing and serial data aggregation over I²C/SPI/UART.

Technical Context

The device integrates a dedicated analog subsystem with two independent ADCs, a programmable UAB configurable as a 12-bit incremental ΔΣ ADC or dual 13-bit DACs, and flexible analog routing via a 38-channel analog mux. Its digital domain includes three run-time configurable SCBs (I²C/SPI/UART), eight 16-bit TCPWM blocks, and descriptor-based 8-channel DMA.

Power management enables three operational modes: Active (48 MHz CPU), Sleep (CPU clock-gated), and Deep-Sleep (2.5 µA system current with opamps active). The WCO and IMO clocks feed a programmable clock tree supporting precise timing for sensor sampling, LCD drive, and communication interfaces.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4A6VGT6 and MAX32660, CY8C4A45AZI-483 uniquely combines hardware-configurable analog resources, production-ready CapSense IP, and Deep-Sleep analog retention - reducing BOM count and firmware development time for sensor-hub and human-interface applications.

Availability

CY8C4A45AZI-483 is available at Aetrix Electronics and suitable for industrial sensor hubs, smart home environmental monitors, portable medical wearables, and asset tracking beacons requiring stable component supply and long-term manufacturability.

Supply support for CY8C4A45AZI-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 markets.

CY8C4Axx is part of Infineon's PSoC Analog Coprocessor product line, designed specifically to offload analog-intensive tasks from host MCUs in multi-sensor embedded systems - emphasizing reconfigurable AFEs, hardware-accelerated capacitive sensing, and ultra-low-power operation.

FAQ

What debug interface does CY8C4A45AZI-483 support?

CY8C4A45AZI-483 uses Arm Serial Wire Debug (SWD) with two-wire connectivity (SWDIO and SWCLK), supporting full on-chip programming, real-time tracing, and breakpoint debugging. The debug circuits are enabled by default and can be disabled in firmware; re-enabling requires full device erase and reprogramming - enhancing firmware security in deployed systems.

Does CY8C4A45AZI-483 support capacitive touch in wet environments?

Yes - it implements Cypress's fourth-generation CapSense Sigma-Delta (CSD) architecture with hardware-based noise rejection and SmartSense™ automatic tuning. This delivers >100:1 signal-to-noise ratio and maintains reliable button/slide operation under water droplets or condensation, validated per IEC 61000-4-6 and IPX1 test conditions.

Can the analog blocks be reconfigured after deployment?

Yes - the Universal Analog Block (UAB), opamps, comparators, and ADCs are fully reconfigurable at runtime via firmware. PSoC Creator generates initialization code that allows dynamic switching between filter modes, DAC outputs, or ADC configurations - enabling field-upgradable sensor interfaces without hardware changes.

What is the minimum supply voltage for Deep-Sleep operation?

CY8C4A45AZI-483 maintains Deep-Sleep functionality down to 1.71 V, with guaranteed 2.5 µA system current and operational opamps/comparators. Below 1.71 V, brown-out detection triggers reset to prevent undefined analog behavior - ensuring reliable wake-up event detection across battery discharge profiles.