Infineon Technologies CY8C4248LQI-BL473T

Overview

CY8C4248LQI-BL473T 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 delivers BLE 4.2 connectivity with –89 dBm RX sensitivity and +3 dBm TX output, supporting capacitive sensing, LCD drive, and TCPWM for motor control in compact IoT edge nodes.

For engineers reviewing the CY8C4248LQI-BL473T datasheet, CY8C4248LQI-BL473T pinout, CY8C4248LQI-BL473T application, or CY8C4248LQI-BL473T equivalent, key selection criteria include integrated BLE subsystem power efficiency (15.6 mA TX @ 0 dBm), Deep Sleep current (1.5 µA), SAR ADC performance (12-bit, 1-Msps), and GPIO flexibility (36 pins, CAPSENSE™/LCD/analog/digital reconfigurable).

Technical Context

This MCU implements a tightly coupled dual-subsystem architecture: the Arm® Cortex®-M0 core manages firmware execution and peripheral orchestration, while the dedicated BLESS (Bluetooth® Low Energy Subsystem) handles RF protocol stack offload including Link Layer engine for master/slave operation and digital PHY processing. The system supports concurrent BLE advertising/scanning and application processing without CPU intervention.

Analog and digital resources are reconfigurable via UDBs (Universal Digital Blocks) and CTBm (Capacitive Touch Block) hardware-enabling runtime tuning of opamp gain, ADC sequencing, and PWM kill-signal triggering. Clocking includes IMO (internal main oscillator), WCO (watch crystal oscillator), and ECO (external crystal oscillator) sources, with automatic clock failover and trimming support for BLE timing compliance.

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, CY8C4248LQI-BL473T uniquely combines BLE 4.2, high-resolution analog, programmable digital logic, and LCD drive in one die - reducing component count and PCB area by up to 40% in sensor+display+connectivity applications.

Availability

CY8C4248LQI-BL473T is available at Aetrix Electronics and suitable for smart home sensor nodes, wearable health monitors, industrial motor controllers, and POS terminal keypads requiring stable component supply and long-term lifecycle support.

Supply support for CY8C4248LQI-BL473T 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.

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

FAQ

Does CY8C4248LQI-BL473T 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) or higher throughput (2 Mbps PHY). For LE 5.0, consider Infineon's later-generation AIROC™ modules like CYW20829.

What is the maximum operating temperature for continuous BLE transmission?

The device is rated for industrial temperature range (–40 °C to +85 °C) under all operating modes. Continuous BLE transmission at +3 dBm output is validated up to +85 °C ambient, with thermal derating applied per datasheet Section 5.2 - junction temperature must remain below 125 °C, requiring adequate PCB copper pour under the exposed pad.

Can the SAR ADC perform simultaneous sampling across multiple channels?

No. The 12-bit SAR ADC uses a single sample-and-hold circuit and sequential channel scanning via hardware sequencer. True simultaneous sampling requires external parallel ADCs. However, the sequencer supports sub-microsecond inter-channel delay and signal averaging - achieving effective resolution enhancement for correlated sensor arrays.

Is the WCO (32.768 kHz crystal) mandatory for BLE operation?

Yes. The WCO is required for BLE connection interval timing accuracy and low-power Deep Sleep wake-up synchronization. While the IMO provides fast startup, its ±2% tolerance exceeds BLE specification limits; the WCO's ±20 ppm stability ensures compliant advertising intervals and connection event alignment per Bluetooth SIG qualification requirements.