Infineon Technologies CY8C4248LQI-BL573

Overview

CY8C4248LQI-BL573 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 in Deep Sleep at 1.5 µA with WCO active-enabling battery-powered BLE sensor nodes and human interface devices.

For engineers reviewing the CY8C4248LQI-BL573 datasheet, CY8C4248LQI-BL573 pinout, CY8C4248LQI-BL573 application, or CY8C4248LQI-BL573 equivalent, key selection criteria include integrated BLE subsystem performance, capacitive sensing SNR (>5:1), low-power Deep Sleep/Stop modes (60 nA), and reconfigurable UDB-based digital logic for field-tunable firmware-defined peripherals.

Technical Context

The device implements a dual-domain architecture: an Arm® Cortex®-M0 CPU core with DMA and flash accelerator coexists with a dedicated Bluetooth® LE subsystem (BLESS) containing digital PHY, link-layer engine, and RF transceiver. Clocking supports IMO (8–48 MHz), ILO (32.768 kHz), WCO, and ECO sources for precise timing across BLE connection intervals and analog sampling.

Analog resources include four opamps with comparator mode and ADC input buffering, a 12-bit 1-Msps SAR ADC with channel sequencer and averaging, and two IDACs for CAPSENSE™. Digital flexibility comes from four Universal Digital Blocks (UDBs), each with eight macrocells and data path, enabling custom state machines or peripheral emulation without FPGA-level complexity.

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 BLE microcontroller applications.

Compared with nRF52840-QIAA and CC2642R1F, CY8C4248LQI-BL573 uniquely combines BLE 4.2, ARM Cortex-M0, programmable analog/digital fabric, and production-ready CAPSENSE™ in one die - reducing system-level component count and qualification effort for cost-sensitive, sensor-rich BLE endpoints.

Availability

CY8C4248LQI-BL573 is available at Aetrix Electronics and suitable for wireless sensor nodes, smart home HMI systems, wearable health monitors, and industrial BLE edge nodes requiring stable component supply and long-term manufacturability.

Supply support for CY8C4248LQI-BL573 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 and manufacturing infrastructure.

CY8C4248LQI-BL573 belongs to the PSoC™ 4 CY8C4xxx-BL family, designed specifically for highly integrated, low-power Bluetooth® LE endpoint devices that require field-reconfigurable analog and digital logic alongside certified wireless connectivity.

FAQ

What development tools are required to program and debug CY8C4248LQI-BL573?

Programming and debugging use Infineon's free PSoC™ Creator IDE with schematic-based design entry, or ModusToolbox™ with Arm GCC toolchain. Hardware interface requires MiniProg3 or KitProg2 programmer/debugger supporting SWD protocol. No JTAG adapter is needed - SWDCLK and SWDIO pins are dedicated and electrically compatible with standard CMSIS-DAP debuggers.

Does CY8C4248LQI-BL573 support Bluetooth® LE 5.0 or later?

No - CY8C4248LQI-BL573 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 Throughput (2 Mbps PHY), or Advertising Extensions. For LE 5.0, consider Infineon's later-generation AIROC™ modules like CYW20829.

Can the on-chip opamps be used in unity-gain buffer configuration with full rail-to-rail output swing?

Yes - the four CTBm opamps support unity-gain buffer mode with rail-to-rail output swing (VDD to VSS) when powered from the same supply as the analog domain. Each opamp has programmable bandwidth and drive strength, and can operate in Deep Sleep mode with reduced quiescent current, enabling always-on sensor signal conditioning.

Is the 7 mm × 7 mm 56-pin QFN package lead-free and RoHS-compliant?

Yes - the LQI package variant (as indicated in the part number suffix "LQI") is lead-free, halogen-free, and fully RoHS 2011/65/EU compliant. The exposed thermal pad is electrically connected to VSS and must be soldered to a PCB thermal pad with ≥6 thermal vias for optimal thermal performance and mechanical reliability.