Infineon Technologies CY8C4248LQI-BL483T

Overview

CY8C4248LQI-BL483T from Infineon is a 32-bit PSoC™ 4 programmable system-on-chip MCU integrating an Arm® Cortex®-M0 CPU (48 MHz), 256 KB flash, 32 KB SRAM, and a fully embedded AIROC™ Bluetooth® LE 4.2 radio subsystem with –89 dBm RX sensitivity and +3 dBm TX output. It supports capacitive sensing (CSD), 12-bit 1-Msps SAR ADC, and up to 36 GPIOs in a 7 mm × 7 mm 56-pin QFN package - deployed in wireless human interface devices and BLE-enabled sensor nodes.

For engineers reviewing the CY8C4248LQI-BL483T datasheet, CY8C4248LQI-BL483T pinout, CY8C4248LQI-BL483T application, or CY8C4248LQI-BL483T equivalent, key selection criteria include integrated BLE PHY/link-layer coexistence with programmable analog/digital blocks, Deep Sleep current (1.5 µA), and hardware-accelerated CAPSENSE™ with SmartSense tuning.

Technical Context

This device implements a tightly coupled dual-subsystem architecture: the Arm® Cortex®-M0 core executes firmware while the dedicated BLESS (Bluetooth® Low Energy SubSystem) handles RF baseband, link-layer state machine, and packet encryption/decryption independently. The BLESS includes a 2.4-GHz transceiver with 50-Ω antenna drive and digital PHY supporting both master and slave roles.

Analog resources include four opamps with Comparator mode and ADC input buffering, plus 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, moisture sensitivity level 3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with nRF52833 and CC2642R, CY8C4248LQI-BL483T uniquely combines BLE radio, programmable analog (opamps, ADC, IDAC), and digital logic (UDBs) in one die - reducing component count and enabling in-field tuning of sensor interfaces and timing behavior without firmware changes.

Availability

CY8C4248LQI-BL483T is available at Aetrix Electronics and suitable for smart wearables, industrial wireless nodes, BLE remote controls, and smart home thermostats requiring stable component supply and long-term lifecycle support.

Supply support for CY8C4248LQI-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 MCUs, and secure connectivity solutions, with global manufacturing and R&D infrastructure.

CY8C4248LQI-BL483T belongs to the PSoC™ 4 CY8C4xxx-BL family - designed specifically for ultra-low-power, mixed-signal IoT edge devices requiring integrated BLE, capacitive sensing, and field-reconfigurable analog/digital peripherals.

FAQ

What development tools are supported for CY8C4248LQI-BL483T?

PSoC™ Creator IDE (free Windows-based tool) provides schematic-driven design, pre-verified components, and automatic routing for analog/digital blocks. It supports code generation for Arm® Cortex®-M0 and integrates with industry-standard Arm® GCC and Keil MDK. Debugging uses SWD via MiniProg3 or KitProg2 programmers.

Does CY8C4248LQI-BL483T require external crystals for BLE operation?

Yes - a 24 MHz fundamental-mode crystal is mandatory for the BLESS RF subsystem (XTAL_IN/XTAL_OUT pins), and a 32.768 kHz watch crystal (WCO_IN/WCO_OUT) is required for Deep Sleep timing and RTC. Layout must follow AN95089 guidelines for matching network and grounding.

Can all 36 GPIOs be used simultaneously for CAPSENSE™ and analog functions?

No - while any GPIO can be assigned to CAPSENSE™ or analog input, shared analog routing resources (e.g., SAR ADC input mux, opamp outputs) limit concurrent high-speed analog acquisition and full-capacitance scanning. Up to 20 electrodes can be scanned at >100 Hz with SmartSense enabled.

Is the BLE stack included in the device firmware or loaded externally?

The BLE link-layer and PHY are implemented in dedicated BLESS hardware; the host stack (e.g., BLE profiles, GATT server) resides in flash and is provided as part of Infineon's PSoC™ Component Library. No external BLE stack license or external memory is required - full BLE 4.2 functionality is self-contained.