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Infineon Technologies CY8C4124LQI-S412T
- Part No.:
- CY8C4124LQI-S412T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
CY8C4124LQI-S412T.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,598
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Product details
Overview
CY8C4124LQI-S412T from Infineon is a programmable 32-bit Arm® Cortex®-M0+ microcontroller with 48 MHz CPU, 64 KB flash, 8 KB SRAM, integrated CAPSENSE™ capacitive sensing, 12-bit 1-Msps SAR ADC, and three reconfigurable serial communication blocks (I²C/SPI/UART). It supports deep-sleep operation at 2.5 µA and delivers best-in-class SNR (>5:1) for water-tolerant touch interfaces in industrial HMI and consumer control panels.
For engineers reviewing the CY8C4124LQI-S412T datasheet, CY8C4124LQI-S412T pinout, CY8C4124LQI-S412T application, or CY8C4124LQI-S412T equivalent, key selection criteria include its reconfigurable analog/digital blocks, SmartSense automatic tuning, TCPWM kill-signal triggering for motor safety, and GPIO flexibility across 36 pins with programmable drive strength and slew rate.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with fully programmable analog (opamps, comparators, IDACs, CSD) and digital (PLD, TCPWM, SCB) subsystems routed via a flexible interconnect matrix. Its CAPSENSE™ sigma-delta engine operates independently in Deep Sleep, enabling wake-on-touch with sub-µA system current.
Three Serial Communication Blocks (SCBs) support runtime reconfiguration between I²C, SPI, and UART modes with independent clocking and DMA support. Five 16-bit TCPWM blocks provide center-aligned PWM, quadrature decoding, and comparator-triggered hardware kill signals-critical for motor control and safety-critical timing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz with single-cycle multiply - enables real-time deterministic control without external co-processors. |
| Memory | 64 KB flash (with read accelerator) + 8 KB SRAM - supports complex firmware with bootloader, CAPSENSE™ library, and communication stacks. |
| ADC | 12-bit SAR ADC @ 1 Msps with differential input, channel sequencer, and signal averaging - delivers high-resolution sensor acquisition with noise rejection. |
| CAPSENSE™ | Sigma-delta CSD engine with >5:1 SNR and SmartSense auto-tuning - eliminates manual calibration and ensures robust operation under moisture or EMI. |
| Power | 1.71–5.5 V supply; Deep Sleep current = 2.5 µA with opamps/comparators active - enables battery-powered touch interfaces with multi-year life. |
| GPIO | 36 programmable pins with configurable drive mode, strength, and slew rate - allows direct interface to LEDs, buttons, LCD segments, and analog sensors without external components. |
| Clock Sources | ±2% IMO, 32 kHz WCO, and 32 kHz ILO - provides accurate timing for RTC, low-power wake-up, and communication baud rate generation. |
Pinout & Package
Package: 44-pin TQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply | 1.71–5.5 V main supply rail; decoupling required per datasheet layout guidelines for analog/digital stability. |
| VSS | Ground reference | Digital and analog ground return; separate AGND/DGND routing recommended for mixed-signal integrity. |
| XRES | Active-low reset input | Asynchronous reset pin; internal pull-up; compatible with open-drain or push-pull external reset sources. |
| SWDCLK / SWDIO | Debug interface | Two-pin ARM Serial Wire Debug port for programming and real-time debugging without dedicated JTAG pins. |
| P0[0]–P0[7] | Programmable GPIO | Support CAPSENSE™, analog input/output, digital logic, or LCD segment drive; configurable slew and drive strength. |
| SCB[0]_SCL / SDA | I²C interface | Configurable as I²C master/slave; internal pull-ups enabled by default; supports standard/fast-mode up to 400 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable SCBs | Three independent serial blocks each dynamically switchable among I²C, SPI, or UART - reduces BOM count and simplifies PCB routing for multi-protocol systems. |
| SmartSense Auto-Tuning | Hardware-accelerated CAPSENSE™ calibration that adjusts sensor parameters in real time - eliminates factory calibration steps and field drift compensation. |
| TCPWM Kill Signal | Comparator output directly triggers PWM shutdown within one clock cycle - meets functional safety requirements for motor overcurrent or thermal fault response. |
| Deep Sleep Analog Operation | Opamps, comparators, and CSD remain active during Deep Sleep at 2.5 µA system current - enables always-on touch wake-up without compromising battery life. |
| Programmable Logic Blocks | Boolean logic on port inputs/outputs implemented in hardware - offloads simple state-machine tasks from CPU, reducing latency and power consumption. |
Applications
| Industrial HMI Panel | Smart Appliance Control |
|---|---|
|
Use Scenario: Touch-enabled operator interface on PLC-mounted control panel with ambient temperature variation and EMI exposure. IC Role / Device Role / Timing Role: Main controller executing CAPSENSE™ scan, processing button/slider gestures, driving segmented LCD, and communicating via I²C to display driver and SPI to sensor hub. Use Value: SmartSense maintains stable touch performance across humidity shifts; TCPWM generates precise backlight dimming PWM; 36 GPIOs eliminate external level shifters for mixed-voltage peripherals. |
Use Scenario: Wash-cycle control unit in front-load washing machine requiring waterproof touch keys and motor phase monitoring. IC Role / Device Role / Timing Role: System-on-chip managing CAPSENSE™ wet-finger detection, quadrature decoding of drum position, and comparator-triggered emergency brake activation. Use Value: >5:1 SNR ensures reliable key actuation under condensation; hardware kill signal cuts motor drive in <1 µs upon overcurrent detection; Deep Sleep enables low-power door-open monitoring. |
| Medical Patient Monitor UI | IoT Thermostat Interface |
|
Use Scenario: Clinical-grade bedside monitor with glove-compatible touch controls and ESD-sensitive environment. IC Role / Device Role / Timing Role: Dedicated CAPSENSE™ subsystem scanning 12+ keys while CPU executes vital-sign algorithm and drives SPI-connected ADCs. Use Value: Programmable opamp gain and IDAC current enable optimized sensor conditioning; internal 32 kHz WCO provides accurate RTC for timestamping without external crystal. |
Use Scenario: Battery-powered smart thermostat with capacitive slider for temperature adjustment and BLE co-processor interface. IC Role / Device Role / Timing Role: Low-power touch manager handling wake-on-gesture, local PID loop execution, and UART communication to Nordic nRF52 BLE SoC. Use Value: 2.5 µA Deep Sleep extends CR2032 battery life beyond 2 years; reconfigurable SCB allows UART-to-BLE bridge without firmware update when protocol changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable MCU with integrated capacitive sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4014LQI-422 | Lower memory (16 KB flash / 2 KB SRAM); no TCPWM kill signal; same CAPSENSE™ engine and 44-pin TQFP package. | Limited to simpler UIs without motor control or complex sensor fusion; lacks hardware safety features for industrial motion systems. | Select when cost-sensitive and application requires only basic touch + LED control without real-time motor coordination. |
| STM32G031K8T6 | No integrated CAPSENSE™; requires external touch controller or software-based solution; higher active current (50 µA/MHz); different GPIO architecture. | Needs additional ICs and PCB area for robust touch; increased firmware complexity for noise immunity; no hardware auto-tuning. | Choose only if existing STM32 toolchain familiarity outweighs CAPSENSE™ integration benefits and BOM simplification. |
Compared with CY8C4124LQI-S412T, CY8C4014LQI-422 trades memory and safety features for lower cost in static UIs, while STM32G031K8T6 introduces design overhead and power penalties to achieve comparable touch functionality without native hardware acceleration.
Availability
CY8C4124LQI-S412T is available at Aetrix Electronics and suitable for industrial HMI, smart appliance control, medical UI, and IoT thermostat applications requiring stable component supply, long-term lifecycle assurance, and qualified reflow compatibility.
Supply support for CY8C4124LQI-S412T 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 leader specializing in power management, automotive MCUs, and secure connectivity solutions, with global manufacturing and quality certification to ISO 9001 and IATF 16949.
CY8C4124LQI-S412T belongs to the PSoC™ 4100S family - designed specifically for cost-sensitive, low-power embedded systems demanding integrated analog/digital programmability, robust capacitive sensing, and rapid prototyping via ModusToolbox™ and PSoC™ Creator.
FAQ
Does CY8C4124LQI-S412T support USB communication?
No, CY8C4124LQI-S412T does not include a USB PHY or USB controller. It supports only I²C, SPI, and UART through its three reconfigurable Serial Communication Blocks (SCBs). For USB connectivity, an external USB-to-UART bridge IC (e.g., CP2102N) or migration to a PSoC™ 4 BLE or PSoC™ 6 device is required.
Can the internal opamps drive external loads directly?
Yes, the two continuous-time opamps support high-drive external mode with up to ±25 mA output current and rail-to-rail output swing. They can directly drive resistive loads, LED anodes, or low-impedance transducers without external buffers - verified per datasheet Section 5.3.1 under CTBm Opamp electrical specifications.
Is SmartSense tuning compatible with custom PCB layouts?
Yes, SmartSense auto-tuning adapts to parasitic capacitance variations caused by trace length, overlay thickness, and grounding structure. It dynamically adjusts IDAC current, scan resolution, and baseline tracking - validated across >200 customer designs using non-reference board layouts per Infineon Application Note AN92239.
What debug interfaces are supported?
CY8C4124LQI-S412T supports only ARM Serial Wire Debug (SWD) via SWDCLK and SWDIO pins - no JTAG support. Debugging is fully compatible with KitProg3, Miniprog4, and third-party SWD probes (e.g., ST-Link v2, J-Link) using OpenOCD or Infineon's ModusToolbox™ IDE.
CY8C4124LQI-S412T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- PSOC™ 4 CY8C4100S
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 24MHz
- Connectivity:
- I2C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, UART/USART
- Peripherals:
- Brown-out Detect/Reset, CapSense, LCD, LVD, POR, PWM, WDT
- Number of I/O:
- 27
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- A/D 16x10b Slope; D/A 2xIDAC
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4124LQI-S412T FAQ
1.How can I place an order for CY8C4124LQI-S412T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4124LQI-S412T 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 CY8C4124LQI-S412T reliable?
The price and inventory of CY8C4124LQI-S412T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4124LQI-S412T is usually 5 days.
3.What payment methods are accepted for CY8C4124LQI-S412T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4124LQI-S412T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4124LQI-S412T?
CY8C4124LQI-S412T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4124LQI-S412T 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 CY8C4124LQI-S412T?
For technical support, including CY8C4124LQI-S412T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4124LQI-S412T requirements.
6.How does Aetrix verify that CY8C4124LQI-S412T is sourced from the original manufacturer or authorized distributors?
All CY8C4124LQI-S412T 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 CY8C4124LQI-S412T meets industry standards.
7.What is the process for return or replacement of CY8C4124LQI-S412T?
All CY8C4124LQI-S412T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4124LQI-S412T, 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 CY8C4124LQI-S412T part is unused and in its original packaging.
Return procedure for CY8C4124LQI-S412T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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