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Infineon Technologies CY8C4248LQI-BL543
- Part No.:
- CY8C4248LQI-BL543
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 56-UFQFN Exposed Pad
- Datasheet:
-
CY8C4248LQI-BL543.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 56UFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,768
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Product details
Overview
CY8C4248LQI-BL543 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 with 1.7 mA active current. Used in battery-powered BLE sensor nodes requiring on-chip RF, capacitive touch, and low-power timing.
For engineers reviewing the CY8C4248LQI-BL543 datasheet, CY8C4248LQI-BL543 pinout, CY8C4248LQI-BL543 application, or CY8C4248LQI-BL543 equivalent, key selection criteria include integrated BLE subsystem compatibility, Deep Sleep current (1.5 µA), SAR ADC resolution (12-bit, 1-Msps), and GPIO count (36) with CAPSENSE™ and LCD drive support.
Technical Context
This MCU implements a dual-domain architecture: the Arm® Cortex®-M0 core manages firmware execution and protocol stack, while the dedicated BLESS (Bluetooth® Low Energy Subsystem) handles RF PHY, link-layer state machine, and packet encryption independently. The BLESS supports concurrent master/slave roles and includes hardware RSSI (1-dB resolution) and automatic antenna tuning support.
Analog resources include four opamps with Comparator mode and Deep Sleep operation, a 12-bit SAR ADC with channel sequencer and signal averaging, and two IDACs for capacitive sensing. Digital flexibility comes from four UDBs (Universal Digital Blocks), each with eight macrocells and data path, enabling custom logic without FPGA-level complexity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0, 48 MHz with single-cycle multiply and DMA - enables real-time BLE stack execution and sensor fusion without external co-processor. |
| Memory | 256 KB flash (with read accelerator), 32 KB SRAM - sufficient for BLE host stack, application firmware, and OTA update staging. |
| BLE Radio | Bluetooth® LE 4.2, –89 dBm RX sensitivity, +3 dBm TX output - meets Class 1 range requirements for indoor IoT nodes up to 100 m line-of-sight. |
| ADC | 12-bit SAR, 1-Msps, differential/single-ended, channel sequencer with averaging - supports high-SNR analog sensor acquisition (e.g., temperature, pressure) with noise rejection. |
| Power Modes | Deep Sleep: 1.5 µA (WCO active); Hibernate: 150 nA (RAM retention); Stop: 60 nA - enables multi-year battery life in coin-cell–powered BLE beacons. |
| GPIO & Peripherals | 36 programmable pins; 2x SCBs (I²C/SPI/UART), 4x TCPWM, CAPSENSE™ CSD, segment LCD drive - allows full system integration (sensor interface, display, comms, touch UI) on single die. |
Pinout & Package
Package: 7 mm × 7 mm, 56-pin QFN (LQFP-style exposed pad, RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O power supply domains | Independent 1.71–5.5 V rails per port group enable mixed-voltage interfacing (e.g., 1.8 V sensors + 3.3 V UART). |
| P0[0]–P0[7], P1[0]–P1[7], etc. | Programmable GPIOs | All 36 pins support CAPSENSE™, analog input, digital I/O, or LCD segment/common - no fixed-function pin constraints. |
| ANT | RF antenna interface | 50-Ω matched RF output pin; requires external matching network per AN91445 for PCB antenna integration. |
| XRES | Active-low reset input | Asynchronous reset with internal pull-up; compatible with pushbutton or supervisor IC assertion. |
| SWDCK / SWDIO | Debug interface | Two-pin Serial Wire Debug (SWD) for programming and real-time trace via MiniProg3 or KitProg2. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated BLESS subsystem | Dedicated hardware link-layer engine offloads BLE protocol processing from CPU, reducing firmware overhead and jitter in time-critical advertising intervals. |
| Capacitive Sigma-Delta (CSD) | SNR >5:1 with liquid-tolerant operation and SmartSense auto-tuning - eliminates manual calibration for consumer-grade touch buttons and sliders. |
| Programmable UDBs | Four reconfigurable logic blocks with Verilog support - implement custom counters, encoders, or protocol translators without gate-level synthesis tools. |
| Low-power analog | Opamps and comparators functional in Deep Sleep mode - enables wake-on-analog-event (e.g., threshold crossing) with sub-µA quiescent current. |
| Flexible SCBs | Two runtime-reconfigurable serial blocks supporting I²C/SPI/UART on same pins - simplifies BOM by eliminating discrete level shifters or protocol bridges. |
Applications
| Smart Home Sensor Node | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity/motion sensor transmitting alerts via BLE to gateway. IC Role / Device Role / Timing Role: Central MCU executing BLE GATT server, ADC sampling, CAPSENSE™ for button UI, and Deep Sleep scheduling. Use Value: Single-chip integration reduces PCB area by 40% vs. discrete MCU+BLE+touch solution; 1.5 µA Deep Sleep extends CR2032 life to >2 years. | Use Scenario: Wrist-worn pulse oximeter with optical sensing, OLED display, and BLE telemetry. IC Role / Device Role / Timing Role: Real-time sensor controller with synchronized LED drive, ADC acquisition, and low-latency BLE connection events. Use Value: On-chip segment LCD driver powers 4-digit display directly; 12-bit ADC with averaging achieves <1% HR measurement error under motion artifact. |
| Industrial Asset Tracker | BLE-enabled Smart Lock |
Use Scenario: GPS-denied indoor asset tag using BLE proximity scanning and accelerometer-based motion detection. IC Role / Device Role / Timing Role: Motion-triggered BLE advertiser with configurable advertising interval and RSSI-based proximity estimation. Use Value: Hardware RSSI (1-dB resolution) and programmable TX power (–18 to +3 dBm) enable accurate distance binning without host-side computation. | Use Scenario: Door lock with capacitive touch keypad, tamper detection, and encrypted BLE unlock command reception. IC Role / Device Role / Timing Role: Secure peripheral controller managing CAPSENSE™ keypad, AES-CCM encryption, and low-duty-cycle BLE listening window. Use Value: SmartSense auto-calibration maintains touch reliability across humidity swings; 60 nA Stop mode ensures >5-year shelf life before first use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar BLE microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Nordic nRF52833 | 64 MHz Arm® Cortex®-M4F, 512 KB flash, 64 KB RAM; higher compute headroom but no integrated analog peripherals (no ADC, opamps, CAPSENSE™). | Requires external ADC/opamp for sensor front-end; better suited for complex BLE mesh or audio streaming. | Select when firmware demands floating-point math or Bluetooth mesh stack - not for analog-rich, cost-sensitive sensor nodes. |
| Texas Instruments CC2642R | 48 MHz Arm® Cortex®-M4F, 352 KB flash, 80 KB RAM; integrated 12-bit ADC (200 kSps), but no programmable analog blocks or CAPSENSE™. | Lacks hardware-accelerated capacitive sensing; uses software-based touch algorithms with lower SNR and no liquid tolerance. | Prefer for long-range BLE (10+ dBm TX) or TI ecosystem users needing SimpleLink SDK - avoid if touch UI or analog flexibility is critical. |
Compared with nRF52833 and CC2642R, CY8C4248LQI-BL543 uniquely combines BLE 4.2, programmable analog (opamps, CSD), and digital logic (UDBs) on one die - eliminating external components for sensor conditioning, touch, and custom timing logic in compact, ultra-low-power designs.
Availability
CY8C4248LQI-BL543 is available at Aetrix Electronics and suitable for smart home sensor nodes, wearable health monitors, industrial asset trackers, and BLE-enabled smart locks requiring stable component supply and long-term lifecycle support.
Supply support for CY8C4248LQI-BL543 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 MCUs, and secure connectivity solutions, with global R&D and manufacturing infrastructure.
CY8C42xx-BL belongs to the PSoC™ 4 family - designed specifically for highly integrated, low-power embedded systems where analog/digital reconfigurability, BLE connectivity, and rapid prototyping via PSoC™ Creator are essential.
FAQ
What development tools are required to program CY8C4248LQI-BL543?
PSoC™ Creator IDE (free Windows-based tool) is the primary environment, supporting schematic-driven design, automatic routing, and pre-verified component libraries. Programming and debug use MiniProg3 or KitProg2 via SWD interface. Arm® GCC and Keil MDK are also supported for firmware-only workflows after initial configuration.
Does CY8C4248LQI-BL543 support over-the-air (OTA) firmware updates?
Yes - the device supports OTA DFU using the BLE stack's bootloader service. AN91267 and AN97060 provide reference implementations. Firmware images are validated via CRC-32 before flashing, and dual-bank flash layout enables safe rollback on update failure.
Can the integrated opamps drive external loads directly?
Yes - opamps support high-drive external mode (up to 25 mA sink/source) and can directly drive resistive or capacitive loads such as thermistors, piezoelectric sensors, or LCD segments. Internal high-bandwidth mode is used for ADC buffering or comparator feedback paths.
Is an external crystal required for BLE operation?
A 24 MHz crystal is mandatory for BLE RF accuracy (±20 ppm), per Bluetooth SIG requirements. The device includes internal IMO and ILO oscillators for non-RF functions, but BLESS requires the external ECO. AN95089 details crystal selection and PCB layout guidelines.
CY8C4248LQI-BL543 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 56-UFQFN Exposed Pad
- Series:
- PSOC™ 4 CY8C4xx8 BLE
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- I2C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, UART/USART
- Peripherals:
- Bluetooth, Brown-out Detect/Reset, DMA LCD, LVD, POR, PWM, SmartCard, SmartSense, WDT
- Number of I/O:
- 36
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- A/D 16x12b SAR; D/A 2xIDAC
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4248LQI-BL543 FAQ
1.How can I place an order for CY8C4248LQI-BL543 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4248LQI-BL543 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY8C4248LQI-BL543 reliable?
The price and inventory of CY8C4248LQI-BL543 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4248LQI-BL543 is usually 5 days.
3.What payment methods are accepted for CY8C4248LQI-BL543?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4248LQI-BL543 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4248LQI-BL543?
CY8C4248LQI-BL543 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4248LQI-BL543 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY8C4248LQI-BL543?
For technical support, including CY8C4248LQI-BL543 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4248LQI-BL543 requirements.
6.How does Aetrix verify that CY8C4248LQI-BL543 is sourced from the original manufacturer or authorized distributors?
All CY8C4248LQI-BL543 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY8C4248LQI-BL543 meets industry standards.
7.What is the process for return or replacement of CY8C4248LQI-BL543?
All CY8C4248LQI-BL543 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4248LQI-BL543, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY8C4248LQI-BL543 part is unused and in its original packaging.
Return procedure for CY8C4248LQI-BL543:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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