Infineon Technologies CY8C4247LQI-BL483T

Overview

CY8C4247LQI-BL483T from Infineon is a 32-bit Arm® Cortex®-M0 microcontroller integrating AIROC™ Bluetooth® LE 4.2 radio, 48 MHz CPU, 256 KB flash, 32 KB SRAM, and programmable analog/digital blocks. It delivers BLE connectivity, capacitive sensing (CSD), LCD drive, and TCPWM for embedded wireless sensor nodes, smart home controllers, and portable medical devices.

For engineers reviewing the CY8C4247LQI-BL483T datasheet, CY8C4247LQI-BL483T pinout, CY8C4247LQI-BL483T application, or CY8C4247LQI-BL483T equivalent, key selection criteria include integrated BLE subsystem performance (–89 dBm RX sensitivity, +3 dBm TX power), Deep Sleep current (1.5 µA), SAR ADC resolution (12-bit, 1-Msps), and GPIO flexibility (36 pins, CAPSENSE™/LCD/analog/digital reconfigurable).

Technical Context

The device implements a dual-domain architecture: a fixed-function BLE subsystem (BLESS) with dedicated digital PHY, link-layer engine, and RF transceiver operating at 2.4 GHz, coexisting with a fully reconfigurable PSoC™ 4 platform including UDBs, SCBs, and TCPWM blocks. Clocking supports IMO (internal 48 MHz), WCO (32.768 kHz), and ECO (up to 24 MHz) sources.

Analog subsystem includes four opamps with Comparator mode and ADC input buffering, a 12-bit SAR ADC with channel sequencer and signal averaging, two IDACs, and two low-power comparators-all operable in Deep Sleep mode. Digital logic supports Verilog-defined state machines and Infineon's peripheral component library.

Key Specifications

Pinout & Package

7 mm × 7 mm, 56-pin QFN package (LQI suffix), thermally enhanced with exposed thermal pad. Pin mapping validated per Infineon datasheet Rev. *B (pages 17–26).

Key Features

Applications

Equivalent & Alternatives

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

Compared with nRF52840-QIAA and CC2642R1F, CY8C4247LQI-BL483T uniquely combines BLE 4.2, reconfigurable analog (opamps + ADC + IDACs), hardware CSD, and LCD drive in one die - minimizing external components for cost-sensitive, sensor-rich, human-interface BLE endpoints.

Availability

CY8C4247LQI-BL483T is available at Aetrix Electronics and suitable for smart home sensor hubs, portable medical monitors, industrial BLE gateway nodes, and interactive wearable controllers requiring stable component supply and full lifecycle support.

Supply support for CY8C4247LQI-BL483T 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 ICs, and embedded security solutions, with global R&D and manufacturing infrastructure.

CY8C42xx-BL belongs to the PSoC™ 4 family - designed specifically for highly integrated, low-power, mixed-signal IoT endpoints where BLE connectivity, capacitive sensing, and programmable analog/digital logic must coexist on a single chip.

FAQ

Does CY8C4247LQI-BL483T support Bluetooth® LE 5.0?

No. This device implements Bluetooth® LE 4.2 only, as confirmed in the official datasheet Rev. *B section 1.3. It does not support LE 5.0 features such as Long Range (Coded PHY), Higher Data Rates (2 Mbps PHY), or Advertising Extensions. Firmware-level upgrades cannot enable these capabilities due to hardware limitations in the BLESS subsystem.

What is the maximum allowed VDDIO voltage for GPIO operation?

The absolute maximum VDDIO rating is 5.5 V per datasheet section 5.1, but recommended operating range is 1.71 V to 5.5 V. All 36 GPIOs are overvoltage tolerant up to 5.5 V regardless of VDDIO setting, and drive strength/slew rate are fully programmable per pin - enabling safe interfacing with 5 V logic or sensors without level shifters.

Can the on-chip opamps be used in transimpedance configuration for photodiode sensing?

Yes. Each of the four opamps supports programmable gain, bandwidth, and drive mode (including high-bandwidth internal drive). The datasheet confirms use in photodiode front-ends via the "Current DAC (IDAC) + Opamp" reference design in AN85951, and opamp inputs accept rail-to-rail common-mode voltage - making them suitable for TIA configurations with external feedback resistors.

Is external flash memory required for OTA firmware updates?

No. With 256 KB on-chip flash, the device supports dual-bank OTA updates using the bootloader component in PSoC™ Creator. One bank runs active firmware while the other receives and validates new image; swap occurs after reset. No external memory is needed unless application code + BLE stack + assets exceed available flash - which is uncommon for typical BLE peripheral implementations.