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Infineon Technologies CY8C4014LQI-421T
- Part No.:
- CY8C4014LQI-421T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 16-UFQFN Exposed Pad
- Datasheet:
-
CY8C4014LQI-421T.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,406
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Product details
Overview
CY8C4014LQI-421T from Infineon (formerly Cypress) is a 32-bit Arm Cortex-M0 programmable system-on-chip (PSoC) 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 for industrial HMI and consumer appliances.
For engineers reviewing the CY8C4014LQI-421T datasheet, CY8C4014LQI-421T pinout, CY8C4014LQI-421T application, or CY8C4014LQI-421T equivalent, key selection criteria include CapSense SNR performance, I²C wake capability in Deep Sleep, programmable GPIO drive strength, TCPWM kill-signal triggering, and SWD debug interface compatibility with Arm toolchains.
Technical Context
The device implements a single-core Arm Cortex-M0 CPU running at up to 16 MHz with Thumb-2 instruction set support, nested vectored interrupt controller (NVIC), and Serial Wire Debug (SWD) interface with four breakpoint and two watchpoint comparators. Flash includes a read accelerator enabling zero-wait-state access at full speed.
Capacitive sensing uses Cypress's Sigma-Delta (CSD) architecture with SmartSense™ automatic tuning across 5–45 pF sensor range and best-in-class water tolerance. The analog subsystem integrates a 1.2-V internal reference for the comparator and ±5% reference for IDACs, with no external ADC - sensing resolution derived from CSD-based capacitance measurement.
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 control. |
| Flash Memory | 16 KB with Read Accelerator - delivers zero-wait-state execution at 16 MHz for deterministic firmware timing. |
| SRAM | 2 KB, zero-wait-state - sufficient for small RTOS stacks, CapSense firmware buffers, and sensor data aggregation. |
| CapSense | Cypress CSD engine with SmartSense™ - eliminates manual calibration; supports self- and mutual-capacitance topologies with >80 dB SNR. |
| I²C Block | Multi-master SCB-I²C with Deep Sleep address detect - wakes CPU on slave address match without full power-up, reducing average current to <1 µA. |
| TCPWM | One 16-bit timer/counter/PWM block with center-aligned, edge-aligned, and pseudo-random modes - supports motor control timing and LED dimming with comparator-triggered kill signals. |
| Supply Range | 1.71 V to 5.5 V - allows direct connection to Li-ion, 3.3 V, or 5 V rails without LDO, simplifying power architecture. |
Pinout & Package
Package: 24-pin QFN (4 × 4 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply input | 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 common return; must be low-impedance connection to minimize noise coupling into CapSense. |
| 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 SCL/SDA | Default I²C interface pins; also support wake-on-address-detect in Deep Sleep; slew rate programmable for EMI control. |
| SWDCK / SWDIO | Serial Wire Debug interface | 2-pin debug port supporting full programming, breakpoints, and real-time trace; no JTAG TAP required. |
| XRES | External reset input | Active-low asynchronous reset; internal pull-up enabled; compatible with pushbutton or supervisor IC reset outputs. |
Key Features
| Feature | Design Value |
|---|---|
| CapSense CSD Engine | Hardware-accelerated sigma-delta modulator with >80 dB SNR and automatic SmartSense™ tuning - reduces firmware overhead and improves robustness against moisture and EMI. |
| Deep Sleep Wake Sources | I²C address match, GPIO interrupt, WDT timeout, or comparator output - enables sub-µA system standby with responsive wake latency (35 µs). |
| Programmable I/O Drive | Configurable drive strength (2–12 mA), slew rate (fast/slow), and mode (push-pull, open-drain, high-Z) - eliminates need for external level shifters or bus buffers. |
| SWD Debug Interface | 2-pin serial wire debug with full flash programming, live register inspection, and hardware breakpoints - supports in-system debugging without dedicated debug pods or emulators. |
| Security Configuration | Flash protection bits and debug disable lock - prevents unauthorized firmware readout or reprogramming after production programming. |
Applications
| Industrial HMI Panels | Smart Home Touch Controls |
|---|---|
Use Scenario: Wall-mounted control panels with waterproof overlay and multi-button touch interface in factory environments. IC Role / Device Role / Timing Role: Primary MCU executing CapSense firmware, managing I²C communication with display driver, and controlling status LEDs via TCPWM. Use Value: CSD engine's water tolerance and SmartSense™ eliminate recalibration during condensation events; Deep Sleep + I²C wake reduces panel standby power to <5 µA. | Use Scenario: Battery-powered light switches and scene controllers with capacitive slider and tap detection. IC Role / Device Role / Timing Role: Standalone touch controller with BLE interface (via external transceiver), using IDACs for sensor scanning and TCPWM for LED feedback dimming. Use Value: 1.71–5.5 V operation enables direct use of CR2032 (3 V) or two AA cells (3 V); 2 KB SRAM holds touch state machine and debounce history without external RAM. |
| Medical Device Keypads | White Goods Control Boards |
Use Scenario: Sterilizable touch interfaces on infusion pumps and diagnostic equipment requiring ESD immunity and glove operation. IC Role / Device Role / Timing Role: Dedicated CapSense processor offloading touch processing from main application MCU; communicates via I²C with host. Use Value: Hardware CSD engine achieves >15 kV HBM ESD tolerance on sense pins; comparator-based proximity detection enables glove-mode activation without sensitivity loss. | Use Scenario: Washing machine and dishwasher control boards with rotary encoders, touch buttons, and motor timing functions. IC Role / Device Role / Timing Role: System controller managing user interface, motor PWM generation, and temperature monitoring via external ADC. Use Value: TCPWM kill-signal input synchronizes emergency brake pulses with motor phase; integrated IDACs enable ratiometric sensor biasing for thermistor networks. |
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 |
|---|---|---|---|
| CY8C4014LQI-422T | Same die, higher IMO accuracy (±1% vs ±2%) and extended temperature range (–40°C to +105°C vs –40°C to +85°C) | Suitable for automotive cabin controls or industrial drives requiring extended thermal stability | Select when operating above 85°C ambient or when tighter clock tolerance is needed for synchronous I²C slave timing. |
| STM32G031F8P6 | No integrated CapSense; 64 MHz Cortex-M0+, 64 KB flash, 8 KB SRAM; requires external touch controller or software-based capacitive sensing | Better suited for cost-sensitive applications where touch is secondary and code footprint exceeds 16 KB | Choose when prioritizing raw compute throughput, larger memory, or ST ecosystem toolchain integration over integrated touch performance. |
Compared with CY8C4014LQI-422T, the -421T trades extended temperature and tighter clock tolerance for lower unit cost and qualification scope; versus STM32G031F8P6, it delivers superior out-of-box capacitive sensing with no firmware tuning but less flash headroom and no USB.
Availability
CY8C4014LQI-421T is available at Aetrix Electronics and suitable for industrial HMI panels, smart home touch controls, medical device keypads, and white goods control boards requiring stable component supply, long-term lifecycle assurance, and qualified PSoC 4000-series sourcing.
Supply support for CY8C4014LQI-421T 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 family as part of its broader embedded control and connectivity portfolio.
The PSoC 4000 product line targets cost-optimized, touch-enabled embedded systems requiring integrated analog, programmable logic, and low-power operation - designed specifically for rapid development of differentiated human interface and sensor-edge applications.
FAQ
Does CY8C4014LQI-421T support USB or Bluetooth connectivity?
No. CY8C4014LQI-421T does not integrate USB PHY, Bluetooth radio, or any wireless transceiver. It provides only I²C, GPIO, and SWD interfaces. Wireless functionality must be added externally via companion ICs such as CYW20735 (Bluetooth) or EZ-USB FX3 (USB bridge), connected via I²C or UART.
Can the CapSense block operate independently while the CPU is in Deep Sleep?
Yes. The CapSense CSD block continues scanning in Deep Sleep mode using the ILO clock, and can generate an interrupt or wake the CPU upon threshold crossing. This enables ultra-low-power touch wake-up with typical current draw below 1 µA during idle sensing.
What is the maximum operating frequency of the TCPWM block?
The TCPWM block runs at the peripheral clock frequency (FCPU divided by configurable prescaler). With FCPU at 16 MHz and prescaler = 1, the TCPWM counter operates at 16 MHz, supporting PWM frequencies up to 250 kHz at 16-bit resolution or 1 MHz at 8-bit resolution - sufficient for LED dimming and basic motor control.
Is PSoC Creator still the recommended IDE for CY8C4014LQI-421T development?
Yes. PSoC Creator remains the officially supported IDE for CY8C4014LQI-421T, providing schematic-based design entry, automatic routing, pre-verified CapSense and TCPWM components, and full SWD debug integration. Infineon confirms continued maintenance and bug fixes through at least 2026.
CY8C4014LQI-421T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 16-UFQFN Exposed Pad
- Series:
- PSOC™ 4 CY8C4000
- Packaging:
- Tape & Reel (TR)
- 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-421T FAQ
1.How can I place an order for CY8C4014LQI-421T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4014LQI-421T 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-421T reliable?
The price and inventory of CY8C4014LQI-421T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4014LQI-421T is usually 5 days.
3.What payment methods are accepted for CY8C4014LQI-421T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4014LQI-421T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4014LQI-421T?
CY8C4014LQI-421T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4014LQI-421T 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-421T?
For technical support, including CY8C4014LQI-421T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4014LQI-421T requirements.
6.How does Aetrix verify that CY8C4014LQI-421T is sourced from the original manufacturer or authorized distributors?
All CY8C4014LQI-421T 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-421T meets industry standards.
7.What is the process for return or replacement of CY8C4014LQI-421T?
All CY8C4014LQI-421T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4014LQI-421T, 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-421T part is unused and in its original packaging.
Return procedure for CY8C4014LQI-421T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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