Infineon Technologies CY8C4247LQI-BL473

Overview

CY8C4247LQI-BL473 from Infineon is a PSoC™ 4 programmable system-on-chip MCU integrating an Arm® Cortex®-M0 CPU (48 MHz), 256 KB flash, 32 KB SRAM, and a fully embedded AIROC™ Bluetooth® LE 4.2 radio subsystem with –89 dBm RX sensitivity and +3 dBm TX output. It supports capacitive sensing (CSD), 12-bit 1-Msps SAR ADC, and up to 36 GPIOs in a 7 mm × 7 mm 56-pin QFN package for compact wireless sensor node designs.

For engineers reviewing the CY8C4247LQI-BL473 datasheet, CY8C4247LQI-BL473 pinout, CY8C4247LQI-BL473 application, or CY8C4247LQI-BL473 equivalent, key selection criteria include integrated BLE PHY/link-layer coexistence with programmable analog/digital blocks, Deep Sleep current of 1.5 µA with WCO, and hardware-accelerated CAPSENSE™ with SmartSense tuning.

Technical Context

This device implements a tightly coupled dual-subsystem architecture: the Arm® Cortex®-M0 core executes firmware while the BLESS (Bluetooth® Low Energy SubSystem) handles RF baseband, link-layer state machine, and packet encryption independently. The analog subsystem includes four opamps with comparator mode and ADC input buffering, all operable in Deep Sleep mode.

Digital flexibility stems from four Universal Digital Blocks (UDBs), each with eight macrocells and data path logic, enabling custom peripherals like motor control PWM with comparator-triggered kill signals or protocol accelerators. Two reconfigurable SCBs support concurrent I²C/SPI/UART operation without resource conflict.

Key Specifications

Pinout & Package

Package: 7 mm × 7 mm, 56-pin QFN (LQI) with exposed thermal pad; pin pitch 0.5 mm; JEDEC MS-012AC compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar BLE-enabled programmable MCU applications.

Compared with nRF52840-QIAA and CC2642R1F, CY8C4247LQI-BL473 uniquely combines BLE 4.2 radio, programmable analog (opamps/ADC/CAPSENSE™), and digital logic (UDBs) on one die-enabling full system integration without external signal conditioning or protocol acceleration ICs.

Availability

CY8C4247LQI-BL473 is available at Aetrix Electronics and suitable for smart home sensor nodes, wearable medical patches, industrial asset tags, and interactive retail beacons requiring stable component supply and long-term lifecycle assurance.

Supply support for CY8C4247LQI-BL473 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 MCUs, and secure connectivity solutions, with global R&D centers and ISO/TS 16949-certified manufacturing.

CY8C4247LQI-BL473 belongs to the PSoC™ 4 CY8C4xxx-BL family, designed specifically for highly integrated, low-power wireless embedded systems where BLE connectivity, capacitive sensing, and field-reconfigurable analog/digital logic must coexist on a single chip.

FAQ

What development tools are required to program and debug CY8C4247LQI-BL473?

PSoC™ Creator IDE (free Windows-based tool) is the primary development environment, supporting schematic-based hardware design, C firmware coding, and automatic routing. Debug requires MiniProg3 or KitProg2 programmer/debugger; SWD interface is used for flash programming and real-time debugging with breakpoints and memory inspection.

Does CY8C4247LQI-BL473 support Bluetooth® LE 5.0 or later?

No - CY8C4247LQI-BL473 implements Bluetooth® LE 4.2 only, including LE Data Length Extension and Secure Connections. It does not support LE 5.0 features such as Long Range (Coded PHY), Higher Throughput (2 Mbps PHY), or Advertising Extensions. For LE 5.0, consider Infineon's later AIROC™ CYW20829 series.

Can the on-chip opamps drive standard 50 Ω RF antennas directly?

No - the opamps are for analog signal conditioning (e.g., sensor amplification, comparator thresholds) and cannot drive 50 Ω RF loads. The dedicated 2.4 GHz RF transceiver output (ANT pin) provides 50 Ω matched output; opamps lack RF bandwidth and output power capability for antenna driving.

Is hardware CAPSENSE™ compatible with wet or gloved-finger operation?

Yes - the capacitive sigma-delta (CSD) block delivers >5:1 signal-to-noise ratio and built-in liquid tolerance, validated per IEC 61000-4-6 for operation under water film or with thick gloves. SmartSense auto-tuning adjusts baseline and thresholds dynamically without firmware intervention.