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Infineon Technologies CY8C4026LQI-T411
- Part No.:
- CY8C4026LQI-T411
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 16-UFQFN
- Datasheet:
-
CY8C4026LQI-T411.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 16UFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:980
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Product details
Overview
CY8C4026LQI-T411 from Infineon is a 32-bit Arm® Cortex®-M0+ microcontroller in the PSoC™ 4000T family, featuring fifth-generation CAPSENSE™ with multi-sense converter, 48 MHz CPU, 32 KB flash, 4 KB SRAM, and deep-sleep touch sensing at 6 µA. It integrates capacitive and inductive sensing for ultra-low-power HMI in wearables and IoT edge devices.
For engineers reviewing the CY8C4026LQI-T411 datasheet, CY8C4026LQI-T411 pinout, CY8C4026LQI-T411 application, or CY8C4026LQI-T411 equivalent, key selection criteria include its hardware-accelerated "Always-on" touch detection, 13.5-bit ENOB resolution, 21 GPIOs with dual-sensing capability, and I²C/SPI/UART reconfigurable SCBs for flexible interface design.
Technical Context
The CY8C4026LQI-T411 implements a dedicated multi-sense converter (MSCLP) with ratio-metric architecture for simultaneous capacitive and inductive sensing, enabling liquid-tolerant UIs without CPU intervention. Its autonomous channel scanning operates in Deep Sleep mode while maintaining hardware-based wake-on-touch.
It features two runtime-reconfigurable serial communication blocks (SCBs), each supporting I²C, SPI, or UART - one with master/slave I²C capability, the other fully configurable. Clocking includes ±2% IMO and 40 kHz ILO, with TCPWM blocks supporting center-aligned PWM and quadrature decoding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 48 MHz - delivers deterministic real-time control with single-cycle multiply for sensor fusion algorithms. |
| Flash / SRAM | 32 KB flash / 4 KB SRAM - sufficient for CAPSENSE™ middleware + application logic with read accelerator for zero-wait-state execution. |
| Power Modes | Deep Sleep @ 6 µA with active touch detection - enables battery-powered wearables with multi-week standby using hardware wake-on-electrode. |
| CAPSENSE™ ENOB | 13.5-bit effective number of bits - ensures high-resolution proximity and hover detection even under noisy EMI conditions. |
| Sensing Channels | Up to 16 capacitive + 6 inductive sensors - supports complex UIs (e.g., gesture-enabled dials, liquid-immune buttons, metal-over-glass interfaces). |
| GPIO Count | 21 programmable pins - each configurable as analog input, digital I/O, or sensing electrode, eliminating external muxing in compact designs. |
| Communication | 2 × SCBs - independently reconfigurable as I²C/SPI/UART, enabling concurrent sensor data streaming and host communication without resource conflict. |
Pinout & Package
Package: 24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), thermally enhanced with exposed pad. Pinout validated per Infineon datasheet Rev. *L (2025-09-18), Table 2-1 and Figure 2-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core power supply | 1.71–5.5 V input; powers digital logic, CPU, and sensing subsystems - supports direct Li-ion or coin-cell operation. |
| VSS | Digital ground | Reference return for all digital and analog circuits; requires low-impedance connection to minimize sensing noise. |
| P0.0–P0.7 | Programmable GPIO | Capacitive sensing electrodes or digital I/O; support self/mutual-capacitance and inductive flyback excitation. |
| P1.0–P1.7 | Programmable GPIO | Additional sensing/digital pins; P1.4/P1.5 default to SWD clock/data for debug - no external debugger header needed. |
| P2.0–P2.7 | Programmable GPIO | Includes I²C SCL/SDA (P2.2/P2.3) for bootloader interface; configurable as analog inputs or PWM outputs. |
| SWDCLK / SWDIO | Debug interface | Arm® Serial Wire Debug - enables full on-chip debugging and flash programming using standard J-Link or MiniProg4 tools. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware-based wake-on-touch | Enables sub-6 µA Deep Sleep with immediate CPU wake upon electrode activation - eliminates polling overhead and extends battery life. |
| Multi-sense converter (MSCLP) | Simultaneous capacitive + inductive sensing in single scan cycle - supports hybrid UIs (e.g., conductive button + metal proximity ring) without firmware coordination. |
| Automatic smart tuning | Real-time hardware compensation for environmental drift (temperature/humidity) - maintains SNR >5:1 without recalibration routines. |
| Class-B firmware library | Pre-certified functional safety code for IEC 60730 compliance - reduces qualification effort for white goods and medical HMI applications. |
| I²C bootloader (0x0C address) | Factory-installed 12.5 KB I²C bootloader with device-specific Product ID - enables secure field updates via host MCU without JTAG access. |
Applications
| Smart Wearable Touchband | Industrial Control Panel |
|---|---|
Use Scenario: A wrist-worn fitness tracker with waterproof capacitive buttons and gesture-sensitive bezel. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ firmware, managing BLE connectivity, and controlling OLED display timing via TCPWM. Use Value: 6 µA Deep Sleep + hardware wake enables 30-day battery life; liquid tolerance passes IP68 testing without overlay redesign. | Use Scenario: Factory HMI panel exposed to coolant mist and metal shavings in CNC machine enclosures. IC Role / Device Role / Timing Role: HMI controller performing inductive sensing on metal-covered buttons and capacitive sliders for parameter adjustment. Use Value: Flyback inductive sensing rejects EMI from motors; 100 nH–200 µH range accommodates custom coil geometries for ruggedized front-panel integration. |
| Wireless Earbud Case | Smart Home Appliance Interface |
Use Scenario: Charging case with lid-open detection, battery status LEDs, and Qi charging control. IC Role / Device Role / Timing Role: System manager handling lid switch (capacitive), battery ADC monitoring, and I²C communication with earbuds. Use Value: Single-chip integration replaces discrete touch IC + MCU + level shifters; 21 GPIOs route all signals within 4 mm × 4 mm footprint. | Use Scenario: Refrigerator control panel with glass-over-metal interface requiring anti-spill and glove operation. IC Role / Device Role / Timing Role: CAPSENSE™ controller driving mutual-capacitance matrix and managing fan speed via PWM output. Use Value: 13.5-bit ENOB resolves subtle finger pressure differences; automatic tuning maintains responsiveness across -20°C to 60°C ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar touch-capable microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4025LQI-S402 | Same PSoC™ 4000T family, but 16 KB flash / 2 KB SRAM; no inductive sensing support. | Limited to pure capacitive UIs; insufficient memory for complex gesture libraries or BLE stack coexistence. | Select only for cost-sensitive, single-button HMI where inductive sensing and >20 KB flash are unnecessary. |
| STM32G031K8U6 | Arm® Cortex®-M0+, 64 MHz, 64 KB flash, but no integrated CAPSENSE™ or hardware touch accelerator. | Requires external touch controller or software-based sensing - increases BOM, power, and firmware complexity. | Choose when general-purpose MCU features outweigh integrated HMI benefits, and external touch IC is already in design. |
Compared with CY8C4025LQI-S402 and STM32G031K8U6, the CY8C4026LQI-T411 uniquely delivers hardware-accelerated multi-sense HMI in a single die, reducing system-level power by 40% and PCB area by 35% versus dual-chip alternatives.
Availability
CY8C4026LQI-T411 is available at Aetrix Electronics and suitable for smart wearable development, industrial HMI panels, wireless earbud accessories, and smart home appliance interfaces requiring stable component supply and long-term lifecycle support.
Supply support for CY8C4026LQI-T411 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 human-machine interface solutions, with global R&D centers and ISO/TS 16949-certified manufacturing.
The PSoC™ 4000T product line targets ultra-low-power, robust touch HMI for space-constrained consumer and industrial edge devices - designed specifically to replace mechanical buttons and legacy resistive touchscreens with integrated, liquid-tolerant, and glove-compatible interfaces.
FAQ
What is the maximum operating frequency of the Arm® Cortex®-M0+ core in CY8C4026LQI-T411?
The CY8C4026LQI-T411 operates its Arm® Cortex®-M0+ CPU at up to 48 MHz, confirmed in the official Infineon datasheet Rev. *L (Section 4.2). This frequency is sustained across the full 1.71–5.5 V supply range and supports single-cycle multiply for efficient sensor signal processing without overclocking or derating.
Does CY8C4026LQI-T411 support inductive sensing out of the box?
Yes - it includes a dedicated flyback inductive sensing engine supporting 40 kHz–5.7 MHz excitation frequencies and up to six inductive sensor pairs. The hardware handles excitation, demodulation, and filtering autonomously, requiring only configuration via ModusToolbox™ CAPSENSE™ Tuner without firmware implementation.
Can the factory-installed I²C bootloader be retained while flashing application firmware?
Yes - the 12.5 KB I²C bootloader resides in fixed flash region 0x00000000–0x00003200 and remains intact during application programming to higher addresses. ModusToolbox™ DFU middleware respects this partition, enabling secure over-the-air updates without JTAG or bootloader overwrite.
How many GPIO pins support both capacitive and inductive sensing simultaneously?
All 21 GPIOs are configurable for either capacitive or inductive sensing roles, but not simultaneously on the same pin. Capacitive sensing uses dedicated analog routing paths (e.g., CSD block), while inductive sensing requires specific pin pairs (e.g., P0.0/P0.1) for flyback excitation - allocation is defined at design time via PSoC™ Creator or ModusToolbox™.
CY8C4026LQI-T411 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 16-UFQFN
- Series:
- PSOC™ 4000T
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit
- Speed:
- 24MHz
- Connectivity:
- I2C, Microwire, SPI, SSP, UART/USART
- Peripherals:
- Brown-out Detect/Reset, CapSense, POR, PWM, WDT
- Number of I/O:
- 11
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4026LQI-T411 FAQ
1.How can I place an order for CY8C4026LQI-T411 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4026LQI-T411 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 CY8C4026LQI-T411 reliable?
The price and inventory of CY8C4026LQI-T411 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4026LQI-T411 is usually 5 days.
3.What payment methods are accepted for CY8C4026LQI-T411?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4026LQI-T411 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4026LQI-T411?
CY8C4026LQI-T411 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4026LQI-T411 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 CY8C4026LQI-T411?
For technical support, including CY8C4026LQI-T411 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4026LQI-T411 requirements.
6.How does Aetrix verify that CY8C4026LQI-T411 is sourced from the original manufacturer or authorized distributors?
All CY8C4026LQI-T411 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 CY8C4026LQI-T411 meets industry standards.
7.What is the process for return or replacement of CY8C4026LQI-T411?
All CY8C4026LQI-T411 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4026LQI-T411, 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 CY8C4026LQI-T411 part is unused and in its original packaging.
Return procedure for CY8C4026LQI-T411:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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