Infineon Technologies CY8C4248LQI-BL553

Overview

CY8C4248LQI-BL553 from Infineon is a 32-bit Arm® Cortex®-M0 microcontroller integrating AIROC™ Bluetooth® LE 4.2 radio, 256 KB flash, 32 KB SRAM, and programmable analog/digital blocks. It delivers -89 dBm RX sensitivity, +3 dBm TX output, and operates at 48 MHz for embedded wireless sensor nodes, BLE beacons, and smart home peripherals requiring integrated RF and mixed-signal flexibility.

For engineers reviewing the CY8C4248LQI-BL553 datasheet, CY8C4248LQI-BL553 pinout, CY8C4248LQI-BL553 application, or CY8C4248LQI-BL553 equivalent, key selection criteria include BLE 4.2 compliance, 1.5 µA Deep Sleep current with WCO, 12-bit 1-Msps SAR ADC, CAPSENSE™ sigma-delta SNR >5:1, and 7 mm × 7 mm 56-pin QFN package compatibility.

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 link-layer operations, RF timing, and packet processing independently. The BLESS includes digital PHY, hardware-accelerated AES encryption, and supports both master and slave roles.

Analog subsystem integration includes four opamps with comparator mode and ADC input buffering, two low-power comparators active in Deep Sleep, and a 12-bit SAR ADC with channel sequencer and signal averaging. Digital flexibility comes from four UDBs (Universal Digital Blocks), each with eight macrocells and data path, enabling custom logic and state machines without external glue logic.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with nRF52833 and CC2642R, CY8C4248LQI-BL553 uniquely combines BLE 4.2 with field-programmable analog/digital logic and production-ready CAPSENSE™, reducing BOM count and enabling rapid iteration of mixed-signal behavior without hardware changes.

Availability

CY8C4248LQI-BL553 is available at Aetrix Electronics and suitable for smart wearables, BLE beacons, capacitive touch remotes, and industrial wireless nodes requiring stable component supply, long-term lifecycle support, and qualified automotive-grade sourcing.

Supply support for CY8C4248LQI-BL553 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, sensing, connectivity, and security solutions for automotive, industrial, and IoT markets.

CY8C4248LQI-BL553 belongs to the PSoC™ 4 CY8C4xxx-BL family, designed specifically to integrate Arm®-based MCU control, AIROC™ Bluetooth® LE radio, and reconfigurable analog/digital peripherals into a single chip for compact, low-power wireless edge devices.

FAQ

Does CY8C4248LQI-BL553 support Bluetooth® LE 5.0 or higher?

No. This device implements Bluetooth® LE 4.2 only, as confirmed in the official Infineon datasheet (Rev. *B, p.1). It does not support BLE 5.0 features such as long-range coded PHY, higher data rates, or extended advertising. Firmware updates cannot extend the underlying radio hardware capabilities.

What is the maximum operating temperature for continuous BLE transmission?

The device is rated for industrial temperature range: –40 °C to +85 °C ambient. Continuous TX operation at +3 dBm is thermally sustainable within this range when using the recommended PCB layout with thermal pad soldered to ≥4 cm² copper pour, per Infineon's AN91445 RF layout guidelines.

Can the 12-bit SAR ADC perform simultaneous sampling across multiple channels?

No. The SAR ADC has a single conversion core with a channel sequencer that performs sequential sampling. While it supports automatic scanning of up to 32 channels with averaging per channel, true simultaneous sampling requires external parallel ADCs or time-interleaved external circuitry.

Is the CAPSENSE™ CSD block certified for IEC 61000-4-6 conducted immunity testing?

Yes. Infineon provides CAPSENSE™ design validation reports confirming compliance with IEC 61000-4-6 Level 3 (10 V/m, 150 kHz–80 MHz) when implemented per AN85951 layout rules, including shielded traces, proper grounding, and decoupling near sense electrodes.