Infineon Technologies CY8C624ALQI-S2D42

Overview

CY8C624ALQI-S2D42 from Infineon is a dual-core PSOC™ 62 microcontroller featuring a 150-MHz Arm® Cortex®-M4F and 100-MHz Cortex®-M0+ CPU, 2048-KB flash, 1024-KB SRAM, and integrated CAPSENSE™, USB FS, QSPI/XIP, and hardware cryptography. It operates from 1.7 V to 3.6 V with deep-sleep current as low as 7 µA (64-KB SRAM retention), targeting secure, ultra-low-power IoT edge nodes with local sensing and connectivity.

For engineers reviewing the CY8C624ALQI-S2D42 datasheet, CY8C624ALQI-S2D42 pinout, CY8C624ALQI-S2D42 application, or CY8C624ALQI-S2D42 equivalent, this page delivers verified specifications, package mapping, real-world use cases, and validated alternative options - all grounded in Infineon's official PSOC™ 62 documentation and production-grade parametric data.

Technical Context

The CY8C624ALQI-S2D42 implements a tightly coupled dual-CPU architecture where the M4 handles complex application tasks and signal processing while the M0+ manages real-time peripherals, security boot, and low-power state coordination. Its memory subsystem includes RWW flash with two 8-KB CPU-specific caches and three independent SRAM blocks enabling selective retention during Deep Sleep.

Hardware security is embedded at silicon level: ROM-based Secured Boot, execute-only memory regions, eight protection contexts, and a dedicated crypto accelerator supporting AES-128/256, SHA-256, ECC, and TRNG. Clocking combines IMO (8 MHz ±2%), ILO (32 kHz), dual PLLs, FLL, and programmable dividers to support dynamic voltage/frequency scaling across six power modes.

Key Specifications

Pinout & Package

This device is packaged in a 100-ball WLCSP (Wafer-Level Chip Scale Package) with 0.4-mm pitch, optimized for space-constrained IoT sensor hubs and wearable endpoints. Pin functions are defined per Infineon's CY8C62x8/A datasheet Rev. *S, Table 4-1 (Pin Descriptions).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core secure MCU applications.

Compared with CY8C6247LQI-D52, this part adds USB FS and uses WLCSP for miniaturization; versus RP2040, it delivers certified secure boot, hardware-accelerated crypto, and production-grade analog integration - critical for certified IoT endpoints.

Availability

CY8C624ALQI-S2D42 is available at Aetrix Electronics and suitable for smart wearables, industrial wireless sensors, secure home gateways, and capacitive touch remotes requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for CY8C624ALQI-S2D42 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 leader specializing in power systems, automotive ICs, and secure microcontrollers, with global manufacturing and quality certification to ISO 9001 and IATF 16949.

The PSOC™ 62 product line targets secure, ultra-low-power IoT endpoints - integrating dual-core processing, hardware security, and configurable analog/digital peripherals into a single chip for edge intelligence without external co-processors.

FAQ

What is the maximum operating frequency of each CPU core in the CY8C624ALQI-S2D42?

The CY8C624ALQI-S2D42 features a 150-MHz Arm® Cortex®-M4F core and a 100-MHz Cortex®-M0+ core. Both operate at their rated frequencies under 1.1-V core supply; at 0.9-V core, maximum frequencies are reduced to maintain timing closure and power efficiency, though exact derated values are specified in the "CPU Current and Transition Times" section of the datasheet (Rev. *S, Section 6.2.2).

Does this device support over-the-air (OTA) firmware updates?

Yes. The CY8C624ALQI-S2D42 supports robust OTA updates via its RWW flash architecture, dual-bank boot scheme, and hardware-assisted cryptographic verification. The ROM-based Secured Boot validates signature and hash of new images before execution, and the SFlash region stores immutable boot metadata required for rollback protection and version enforcement.

Can the CAPSENSE™ subsystem operate during Deep Sleep mode?

Yes. CAPSENSE™ CSD can run autonomously in Deep Sleep mode using the low-power ILO clock source. The subsystem supports automatic scan triggering, result buffering in dedicated registers, and interrupt generation upon threshold crossing - enabling wake-on-touch without CPU intervention.

What debug interfaces are supported, and can they be disabled for security?

The device supports SWD (2-pin) and JTAG (5-pin) interfaces via dedicated pins. All debug and test ingress paths - including SWD, JTAG, and serial wire viewer - can be permanently disabled via eFuse programming after production, preventing unauthorized access to memory or firmware during field operation.