Infineon Technologies CY8C4247LQI-BL473T

Overview

CY8C4247LQI-BL473T from Infineon is a 32-bit Arm® Cortex®-M0 microcontroller integrating AIROC™ Bluetooth® Low Energy (BLE) 4.2 radio, 48 MHz CPU, 256 KB flash, 32 KB SRAM, and programmable analog/digital blocks. It delivers BLE connectivity with –89 dBm RX sensitivity and +3 dBm TX output in a 7 mm × 7 mm 56-pin QFN package, targeting wireless sensor nodes and portable BLE peripherals.

For engineers reviewing the CY8C4247LQI-BL473T datasheet, CY8C4247LQI-BL473T pinout, CY8C4247LQI-BL473T application, or CY8C4247LQI-BL473T equivalent, key selection criteria include integrated BLE subsystem power efficiency (15.6 mA TX at 0 dBm), Deep Sleep current (1.5 µA), SAR ADC performance (12-bit, 1-Msps), and GPIO flexibility (36 programmable pins with CAPSENSE™/LCD/analog support).

Technical Context

This MCU implements a dual-domain architecture: the Arm® Cortex®-M0 core handles application firmware and protocol stack execution, while the dedicated BLESS (Bluetooth® Low Energy Subsystem) manages RF PHY, link-layer state machine, and packet processing independently. The BLESS supports concurrent master/slave roles and includes hardware RSSI (1-dB resolution) and automatic antenna tuning support.

Analog subsystem integration includes four opamps with comparator mode and Deep Sleep operation, a 12-bit SAR ADC with channel sequencer and signal averaging, and two IDACs for capacitive sensing. Digital reconfigurability is enabled via four UDBs (Universal Digital Blocks), each containing eight macrocells and a data path, supporting custom logic and state machines without FPGA-level complexity.

Key Specifications

Pinout & Package

Package: 7 mm × 7 mm, 56-pin QFN (LQI) with exposed thermal pad. Pin mapping follows Infineon's standard CY8C42xx-BL pinout layout, optimized for RF isolation and mixed-signal routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar BLE microcontroller applications.

Compared with nRF52833 and CC2642R, CY8C4247LQI-BL473T uniquely combines BLE 4.2 radio, programmable analog (opamps, ADC, IDACs), and digital logic (UDBs) in one die - reducing system component count and enabling field-tunable sensor interfaces without external ICs.

Availability

CY8C4247LQI-BL473T is available at Aetrix Electronics and suitable for wireless sensor nodes, smart wearables, BLE remote controls, and industrial asset tags requiring stable component supply, full production traceability, and long-term lifecycle support.

Supply support for CY8C4247LQI-BL473T 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 manufacturing and R&D infrastructure.

CY8C42xx-BL belongs to Infineon's PSoC™ 4 family - designed specifically for cost-sensitive, battery-powered IoT endpoints requiring integrated BLE, configurable analog/digital peripherals, and rapid prototyping via PSoC™ Creator IDE.

FAQ

Does CY8C4247LQI-BL473T support Bluetooth® LE 5.0 or later?

No. This device implements Bluetooth® LE 4.2 only, as confirmed in the official Infineon datasheet (Rev. *B). It does not support LE 5.0 features such as Long Range (Coded PHY), higher throughput (2 Mbps PHY), or Advertising Extensions. Firmware updates cannot extend physical layer capabilities beyond hardware design.

What development tools are officially supported for CY8C4247LQI-BL473T?

Infineon officially supports PSoC™ Creator IDE (Windows-only) for schematic-based design and component configuration. Debug and programming use MiniProg3 or KitProg2 programmers. Arm® GCC and Keil MDK toolchains are supported for firmware development after project generation, but PSoC™ Creator remains mandatory for analog/digital block configuration and BLE stack integration.

Can the integrated opamps operate during Deep Sleep mode?

Yes. All four opamps support Deep Sleep operation with configurable power modes (low-power or high-speed), enabling continuous analog signal conditioning (e.g., sensor biasing or comparator monitoring) while consuming <1 µA per opamp - critical for wake-on-event architectures in battery-powered systems.

Is the 7 mm × 7 mm QFN package RoHS-compliant and lead-free?

Yes. The CY8C4247LQI-BL473T uses a lead-free, RoHS-compliant 56-pin QFN package (LQI suffix), with matte tin finish on terminals and halogen-free molding compound, meeting JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and IPC/JEDEC J-STD-033 handling requirements.