Infineon Technologies CY8C4247LQI-BL493

Overview

CY8C4247LQI-BL493 from Infineon is a 32-bit Arm® Cortex®-M0 microcontroller integrating AIROC™ Bluetooth® LE radio, 48 MHz CPU, 256 KB flash, 32 KB SRAM, and programmable analog/digital blocks. It supports BLE 4.2, delivers –89 dBm RX sensitivity and +3 dBm TX output, and targets wireless sensor nodes, smart home peripherals, and portable medical devices requiring embedded processing and low-power wireless connectivity.

For engineers reviewing the CY8C4247LQI-BL493 datasheet, CY8C4247LQI-BL493 pinout, CY8C4247LQI-BL493 application, or CY8C4247LQI-BL493 equivalent, key selection criteria include integrated BLE subsystem performance, Deep Sleep current (1.5 µA), SAR ADC resolution (12-bit, 1-Msps), GPIO count (up to 36), and QFN-56 package compatibility with capacitive sensing and LCD drive capability.

Technical Context

The device implements a dual-domain architecture: the Arm® Cortex®-M0 core handles firmware execution and protocol stack management, while the dedicated BLESS (Bluetooth® Low Energy Subsystem) handles RF PHY, link-layer state machine, and packet encryption offloading. Its UDB-based programmable digital fabric enables custom logic without FPGA toolchains.

Analog subsystem integration includes four opamps with comparator mode and ADC input buffering, a 12-bit SAR ADC with channel sequencer and signal averaging, and two IDACs supporting CAPSENSE™ sigma-delta sensing. All analog blocks retain functionality in Deep Sleep mode, enabling wake-on-touch or wake-on-signal event detection.

Key Specifications

Pinout & Package

Package: 7 mm × 7 mm, 56-pin QFN (LQFP-style exposed pad, RoHS-compliant, moisture sensitivity level 3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Bluetooth® LE microcontroller applications.

Compared with nRF52833 and CC2642R, CY8C4247LQI-BL493 uniquely combines BLE 4.2 radio, Arm® Cortex®-M0, and fully reconfigurable analog/digital hardware in one die-enabling true system-on-chip designs without external signal conditioning, logic, or display drivers.

Availability

CY8C4247LQI-BL493 is available at Aetrix Electronics and suitable for wireless sensor nodes, smart home remotes, portable medical monitors, and capacitive touch keypads requiring stable component supply across industrial and consumer production cycles.

Supply support for CY8C4247LQI-BL493 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and embedded security solutions, with global R&D centers and ISO/TS 16949-certified manufacturing.

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

FAQ

Does CY8C4247LQI-BL493 support Bluetooth® LE 5.0 or later?

No. This device implements Bluetooth® LE 4.2 only, as confirmed in the official datasheet (Rev. *B, p.1). 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 enable these features due to hardware limitations in the BLESS subsystem.

What is the maximum operating temperature for continuous BLE transmission?

The device is rated for industrial temperature range (–40 °C to +85 °C) per absolute maximum ratings (Datasheet p.29). Continuous BLE transmission at +3 dBm output is thermally sustainable up to +85 °C ambient when PCB thermal vias and copper pour meet Infineon's layout guidelines (AN91445), with junction temperature maintained below 125 °C.

Can the SAR ADC perform simultaneous sampling on multiple channels?

No. The 12-bit SAR ADC supports sequential channel scanning via hardware channel sequencer with signal averaging, but lacks true simultaneous sampling capability. It achieves effective 1-Msps throughput across up to 16 channels using programmable sequencing and DMA-triggered result transfer-suitable for multi-sensor polling but not phase-critical motor control feedback.

Is external crystal required for BLE operation?

Yes. BLE RF operation requires a 24 MHz crystal oscillator (ECO) for accurate RF timing, as specified in Section 1.2.5 of the datasheet. The internal IMO (Internal Main Oscillator) is insufficient for BLE compliance. A 32.768 kHz watch crystal (WCO) is optional but recommended for Deep Sleep timing accuracy and low-power RTC functions.