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Infineon Technologies CY8C4014LQI-421
- Part No.:
- CY8C4014LQI-421
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 16-UFQFN Exposed Pad
- Datasheet:
-
CY8C4014LQI-421.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,669
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Product details
Overview
CY8C4014LQI-421 from Infineon (formerly Cypress) is a 32-bit Arm Cortex-M0 programmable system-on-chip (PSoC 4000 family) with 16 KB flash, 2 KB SRAM, integrated CapSense® capacitive sensing, two IDACs, one low-power comparator, and one TCPWM block. It operates from 1.71 V to 5.5 V and supports Deep Sleep wake-up via I²C address match or interrupt - used in touch-enabled human interface modules, smart sensors, and ultra-low-power embedded controllers.
For engineers reviewing the CY8C4014LQI-421 datasheet, CY8C4014LQI-421 pinout, CY8C4014LQI-421 application, or CY8C4014LQI-421 equivalent, key selection criteria include CapSense SNR performance, SmartSense™ auto-tuning range (5–45 pF), I²C wake capability in Deep Sleep, TCPWM kill-signal triggering for motor control, and SWD debug interface compatibility with Arm industry tools.
Technical Context
The device integrates a 16-MHz Arm Cortex-M0 CPU with NVIC (8 interrupts), SYSTICK timer, and Serial Wire Debug (SWD) interface featuring four breakpoint and two watchpoint comparators. Flash includes a Read Accelerator enabling zero-wait-state access at full speed.
Analog subsystem centers on a 1.2-V referenced low-power comparator (±5% reference tolerance), two current DACs (IDACs) usable for CapSense or general analog output, and CapSense Sigma-Delta (CSD) engine delivering best-in-class SNR and water tolerance - all supported by hardware-accelerated SmartSense™ tuning across 5–45 pF sensor capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0, 16 MHz max - enables binary-compatible migration to Cortex-M3/M4 and deterministic real-time execution. |
| Flash Memory | 16 KB with Read Accelerator - delivers zero-wait-state instruction fetch at 16 MHz, critical for deterministic ISR latency. |
| SRAM | 2 KB, zero-wait-state access - sufficient for small RTOS stacks, CapSense firmware buffers, and sensor data aggregation. |
| CapSense Engine | Cypress CSD architecture with SmartSense™ - automatically tunes sensor parameters over 5–45 pF range without host CPU intervention. |
| I²C Block | Multi-master SCB-I²C with Deep Sleep address detection - wakes CPU on matching slave address while consuming <1 µA. |
| TCPWM | One 16-bit timer/counter/PWM block with center-aligned, edge, and pseudo-random modes - supports motor gate drive timing and kill-signal triggering via comparator input. |
| Supply Range | 1.71 V to 5.5 V - allows direct connection to Li-ion, coin cell, or 3.3/5 V rails without external regulators. |
| Debug Interface | 2-pin Serial Wire Debug (SWD) - fully compatible with Arm-standard tools (Keil, IAR, OpenOCD) and PSoC Creator IDE. |
Pinout & Package
Package: 24-pin QFN (4 × 4 mm, 0.5 mm pitch), RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply | Accepts 1.71–5.5 V; powers digital core, analog blocks, and I/O; requires local 100 nF decoupling. |
| VSS | Ground reference | Digital and analog ground plane connection point; must be low-impedance and tied to system GND. |
| P0[0]–P0[7] | Programmable GPIO / CapSense | Port 0 pins support CapSense CSD, analog comparator inputs, and configurable drive modes (strong, open-drain, high-Z). |
| P1[0]–P1[3] | Programmable GPIO / I²C SDA/SCL | Port 1 pins include dedicated I²C functionality with Deep Sleep wake capability; also support PWM and interrupt inputs. |
| XRES | External reset input | Active-low asynchronous reset; internal pull-up enabled; asserts POR-level reset when driven low. |
| SWDIO / SWDCK | Debug interface signals | 2-pin SWD interface for programming and full-chip debugging; no external pull-ups required per spec. |
Key Features
| Feature | Design Value |
|---|---|
| CapSense Sigma-Delta (CSD) | Hardware-accelerated capacitive sensing with >100:1 SNR and immunity to water overlay - eliminates need for external touch controller ICs. |
| SmartSense™ Auto-Tuning | Firmware-transparent calibration across 5–45 pF sensor range - removes manual tuning effort and ensures robust operation across temperature/humidity shifts. |
| Deep Sleep I²C Wake | I²C slave address detection active during Deep Sleep (<1 µA) - enables always-on touch or sensor monitoring without MCU wake overhead. |
| TCPWM Kill-Signal Triggering | Comparator output directly triggers TCPWM fault state - provides sub-microsecond response for motor overcurrent or thermal shutdown protection. |
| SWD Debug Security | Debug disabled via firmware lock; re-enabling requires full flash erase - prevents unauthorized firmware extraction or modification in deployed devices. |
Applications
| Touch-Controlled Home Appliance UI | Low-Power Industrial Sensor Node |
|---|---|
Use Scenario: Touch slider and button interface on microwave oven control panel exposed to steam and condensation. IC Role / Device Role / Timing Role: Primary MCU and CapSense controller; manages touch scan timing, LED feedback, and appliance logic. Use Value: CSD engine's water tolerance and SmartSense™ ensure reliable touch detection despite surface moisture; Deep Sleep + I²C wake enables instant-on response after standby. | Use Scenario: Battery-powered vibration/temperature node in predictive maintenance system with 6-month battery life. IC Role / Device Role / Timing Role: System controller and analog front-end; samples sensor data, runs basic FFT, and transmits via I²C to gateway. Use Value: 1.71 V operation extends battery life; 2 KB SRAM holds sensor buffers and firmware stack; Deep Sleep current <1 µA meets multi-month runtime target. |
| Motorized Window Shade Controller | USB-C Power Delivery Monitor |
Use Scenario: Compact, silent window shade actuator requiring stall detection and soft-start control. IC Role / Device Role / Timing Role: Motor timing controller; TCPWM generates gate drive signals; comparator monitors current sense resistor. Use Value: TCPWM kill-signal path responds in <500 ns to comparator overcurrent event - prevents MOSFET failure during jam conditions. | Use Scenario: Embedded monitor in USB-C cable assembly verifying voltage/current compliance before power negotiation. IC Role / Device Role / Timing Role: Analog measurement unit; IDACs bias precision shunt resistors; comparator detects overvoltage thresholds. Use Value: Two matched IDACs enable ratiometric current sensing; 1.2 V internal reference ensures stable threshold detection across supply variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4014SXI-421 | Same die, 24-pin SOIC package (300 mil); higher thermal resistance and larger footprint. | Limited to through-hole PCB assembly; less suitable for space-constrained consumer designs. | Select for legacy board compatibility or prototyping where QFN rework is impractical. |
| CY8C4013LQI-421 | Same package but reduced memory: 8 KB flash, 1 KB SRAM; no TCPWM block; same CapSense and I²C features. | Suitable only for simpler touch-only or sensor-readout tasks without motor timing or complex firmware. | Choose when BOM cost reduction is critical and application fits within 8 KB code space and lacks PWM requirements. |
Compared with CY8C4014SXI-421 and CY8C4013LQI-421, the CY8C4014LQI-421 uniquely balances QFN miniaturization, 16 KB flash headroom for field-upgradable firmware, and TCPWM-based motor safety - making it optimal for compact, safety-aware, touch-integrated edge controllers.
Availability
CY8C4014LQI-421 is available at Aetrix Electronics and suitable for touch-enabled home appliances, industrial sensor nodes, motorized actuation systems, and USB-C compliance monitors requiring stable component supply and long-term manufacturability.
Supply support for CY8C4014LQI-421 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 acquired Cypress Semiconductor in 2020 and now develops, manufactures, and supports the PSoC portfolio - a leader in programmable mixed-signal SoCs for intelligent edge applications.
The PSoC 4000 product line targets cost-sensitive, ultra-low-power embedded systems requiring integrated analog sensing, capacitive touch, and real-time control - designed specifically for rapid development of differentiated human-interface and sensor-edge products.
FAQ
Does CY8C4014LQI-421 support USB connectivity?
No. The CY8C4014LQI-421 does not include a USB PHY or USB controller. It supports I²C, UART, and SPI via its SCB peripherals. For USB host/device functionality, designers must pair it with an external USB bridge IC or select a PSoC 4100/4200-series part with integrated USBFS.
What is the maximum operating temperature for continuous use?
The CY8C4014LQI-421 is rated for industrial temperature range: –40 °C to +85 °C ambient. Its 24-pin QFN package has a θJA of 125 °C/W; sustained operation at 85 °C requires ≤15 mA average current and adequate PCB copper area for heat dissipation.
Can CapSense operate while the CPU is in Deep Sleep mode?
Yes. CapSense scanning can run autonomously in Deep Sleep using the ILO clock source and hardware CSD engine. Scan results are stored in dedicated registers and trigger a wake-up interrupt upon completion or threshold breach - enabling true low-power touch monitoring.
Is the SWD debug interface accessible after flash protection is enabled?
No. When flash protection is activated via the Protection Register (PROT), SWD access is permanently disabled unless the "Debug Enable" bit remains set. If debug is locked and PROT is active, the only recovery method is full flash erase - which clears both protection and firmware.
CY8C4014LQI-421 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 16-UFQFN Exposed Pad
- Series:
- PSOC™ 4 CY8C4000
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0
- Core Size:
- 32-Bit Single-Core
- Speed:
- 16MHz
- Connectivity:
- I2C
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 12
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- D/A 1x7b, 1x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4014LQI-421 FAQ
1.How can I place an order for CY8C4014LQI-421 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4014LQI-421 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 CY8C4014LQI-421 reliable?
The price and inventory of CY8C4014LQI-421 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4014LQI-421 is usually 5 days.
3.What payment methods are accepted for CY8C4014LQI-421?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4014LQI-421 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4014LQI-421?
CY8C4014LQI-421 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4014LQI-421 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 CY8C4014LQI-421?
For technical support, including CY8C4014LQI-421 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4014LQI-421 requirements.
6.How does Aetrix verify that CY8C4014LQI-421 is sourced from the original manufacturer or authorized distributors?
All CY8C4014LQI-421 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 CY8C4014LQI-421 meets industry standards.
7.What is the process for return or replacement of CY8C4014LQI-421?
All CY8C4014LQI-421 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4014LQI-421, 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 CY8C4014LQI-421 part is unused and in its original packaging.
Return procedure for CY8C4014LQI-421:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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