My Inquiry
My Account
Infineon Technologies CY8C4126AZI-S423T
- Part No.:
- CY8C4126AZI-S423T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
CY8C4126AZI-S423T.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,721
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY8C4126AZI-S423T 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 drives up to 36 GPIOs in analog/digital/CAPSENSE™ modes - used in touch-enabled industrial HMI and battery-powered sensor nodes.
For engineers reviewing the CY8C4126AZI-S423T datasheet, CY8C4126AZI-S423T pinout, CY8C4126AZI-S423T application, or CY8C4126AZI-S423T equivalent, key selection criteria include its dual opamp + comparator analog subsystem, SmartSense auto-tuning for water-tolerant touch, TCPWM kill-signal triggering for motor control, and ModusToolbox™-supported PSoC™ 4100S platform compatibility.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with programmable analog (CTB opamps, LPC comparators, SAR ADC) and digital (TCPWM, SCB, PLD) resources routed via automatic interconnect fabric. Its CAPSENSE™ sigma-delta engine delivers >5:1 SNR and hardware-accelerated SmartSense tuning without host CPU intervention.
System-level timing relies on multiple clock sources: ±2% IMO, 32 kHz ILO, and external WCO. Power management includes Deep Sleep mode with active analog blocks and configurable GPIO drive strength/slew rate per pin - enabling low-power wake-on-touch and high-reliability motor-control PWM dead-time insertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz with single-cycle multiply - enables real-time sensor fusion and deterministic interrupt latency ≤12 cycles. |
| Memory | 64 KB flash (with read accelerator) + 8 KB SRAM - supports firmware updates in-field and buffer-intensive CAPSENSE™ raw data acquisition. |
| Analog Peripherals | Two CTB opamps (deep-sleep capable), two LPC comparators, 12-bit 1-Msps SAR ADC with sequencer - allows simultaneous analog signal conditioning and multi-channel sampling. |
| Digital Peripherals | Five 16-bit TCPWM blocks (center-aligned/edge/pseudo-random), three SCBs (I²C/SPI/UART), quadrature decoder - supports motor control, serial bridging, and encoder interface in one chip. |
| GPIO & Sensing | 36 programmable GPIOs with CAPSENSE™, analog, or digital function per pin; sigma-delta CAPSENSE™ with >5:1 SNR - enables robust touch buttons/sliders under wet conditions. |
| Power | 1.71–5.5 V operation; Deep Sleep current = 2.5 µA with analog active - extends battery life in portable touch interfaces beyond 5 years. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | General-purpose I/O / CAPSENSE™ CSD channel / Analog input | Configurable as touch sense electrode, ADC input, or opamp output - supports self-capacitance and mutual-capacitance topologies. |
| P1[0]–P1[7] | General-purpose I/O / SCB0 SDA/SCL / TCPWM0 line | Hardware-routed to Serial Communication Block 0 and Timer/Counter/PWM block 0 - enables I²C master/slave with synchronized PWM output. |
| P2[0]–P2[7] | General-purpose I/O / SCB1 MOSI/MISO/SCLK / TCPWM1 line | Direct connection to SCB1 (SPI mode) and TCPWM1 - supports SPI-based display interface with backlight dimming via PWM. |
| P3[0]–P3[7] | General-purpose I/O / SCB2 TX/RX / TCPWM2 line | UART debug interface with hardware flow control and independent TCPWM2 channel - allows bootloader over UART with real-time motor fault signaling. |
| VDD / VSS | Power supply / Ground | Separate analog/digital power domains with internal LDO regulation - reduces noise coupling between CAPSENSE™ and digital switching. |
| XRES | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.71–5.5 V logic - ensures reliable startup across wide input voltage range. |
| SWDIO / SWDCK | ARM Serial Wire Debug interface | 2-pin debug port supporting full JTAG/SWD functionality - enables non-intrusive firmware debugging and flash programming in-system. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense auto-tuning | Hardware-accelerated CAPSENSE™ calibration eliminates manual firmware tuning - reduces development time by ≥70% for wet-environment touch designs. |
| Deep Sleep analog retention | Opamps and comparators remain operational at 2.5 µA system current - enables wake-on-touch with sub-100 µs response latency. |
| Reconfigurable SCBs | Three independent serial blocks each support runtime-switched I²C/SPI/UART protocols - simplifies multi-interface peripheral integration without pin remapping. |
| TCPWM kill-signal triggering | Comparator outputs directly assert TCPWM fault inputs - provides <100 ns reaction time for overcurrent shutdown in BLDC motor drivers. |
| Programmable drive strength | GPIO output drive configurable from 2 mA to 25 mA per pin - supports direct LED driving and LCD segment bias without external buffers. |
Applications
| Industrial HMI Panels | Smart Home Touch Controls |
|---|---|
Use Scenario: Wall-mounted thermostat with glass-front capacitive buttons and ambient light sensing. IC Role / Device Role / Timing Role: Main MCU executing CAPSENSE™ scan, SAR ADC reading thermistor/LDR, and UART communication to HVAC controller. Use Value: Single-chip solution replaces discrete touch controller + MCU + ADC, reducing BOM count by 4 components and PCB area by 35%. |
Use Scenario: Battery-powered smart light switch with water-resistant touch surface and BLE co-processor interface. IC Role / Device Role / Timing Role: Touch sensing and system management unit; wakes BLE module only on valid gesture detection. Use Value: 2.5 µA Deep Sleep current extends CR2032 battery life to >3 years while maintaining instant wake-on-touch responsiveness. |
| Medical Patient Interfaces | Motor Control Reference Designs |
Use Scenario: Portable glucose meter with tactile feedback and ESD-hardened touch overlay. IC Role / Device Role / Timing Role: CAPSENSE™ front-end with >5:1 SNR and integrated opamp buffering for analog sensor signal chain. Use Value: Eliminates need for external ESD protection diodes and analog front-end opamp - meets IEC 60601-1 creepage requirements in compact form factor. |
Use Scenario: 3-phase BLDC motor driver evaluation board with overcurrent protection and commutation timing. IC Role / Device Role / Timing Role: Real-time motor control unit generating center-aligned PWM and asserting hardware kill signals via comparator-triggered TCPWM fault. Use Value: Sub-100 ns fault response prevents IGBT shoot-through during short-circuit events - improves functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4026LQI-S423 | Lower memory (32 KB flash / 4 KB SRAM); no CAPSENSE™ sigma-delta; uses legacy CSD v2 instead of SmartSense. | Limited to basic touch or non-touch embedded control; lacks water-tolerance and auto-calibration. | Select when cost sensitivity outweighs advanced touch performance and firmware maintenance burden. |
| STM32G071KBT6 | No integrated CAPSENSE™; requires external touch controller; higher active current (80 µA/MHz vs. 42 µA/MHz). | Suitable for general-purpose control but adds complexity and latency for touch systems. | Choose only if existing STM32 toolchain investment dominates, and touch is secondary to connectivity/performance. |
Compared with CY8C4026LQI-S423, the CY8C4126AZI-S423T delivers 2× flash/SRAM, hardware SmartSense, and >5:1 SNR - critical for production touch reliability. Versus STM32G071KBT6, it integrates touch sensing, reduces component count, and cuts active power by 45% at equivalent throughput.
Availability
CY8C4126AZI-S423T is available at Aetrix Electronics and suitable for industrial HMI, medical patient interfaces, and smart home touch controls requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for CY8C4126AZI-S423T 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, sensing, and microcontroller solutions for industrial, automotive, and IoT markets.
CY8C4126AZI-S423T belongs to the PSoC™ 4100S product line - designed specifically for cost-sensitive, touch-enabled embedded systems requiring integrated analog/digital programmability and ultra-low-power operation.
FAQ
What development tools support CY8C4126AZI-S423T?
Infineon provides full support via ModusToolbox™ (v3.1+), including CAPSENSE™ Tuner, PDL drivers, and middleware stacks. Legacy PSoC™ Creator is also compatible but deprecated after 2024. Hardware debugging uses standard ARM SWD via KitProg3 or MiniProg4 programmers - no proprietary toolchain required.
Does CY8C4126AZI-S423T support I²C multi-master operation?
Yes - all three SCB peripherals support I²C multi-master mode with arbitration, clock stretching, and 10-bit addressing. Each SCB can be configured independently as master or slave, and hardware handles bus contention resolution without CPU intervention.
Can the SAR ADC perform simultaneous sampling on multiple channels?
No - the single 12-bit SAR ADC uses a channel sequencer with hardware averaging but samples one channel at a time. However, its 1-Msps rate and 16-entry sequencer enable effective pseudo-simultaneous acquisition across up to 16 inputs with ≤1 µs inter-channel delay.
Is CAPSENSE™ certification included for common standards like IEC 61000-4-6?
Infineon provides pre-certified CAPSENSE™ design guides and test reports for IEC 61000-4-2 (ESD) and IEC 61000-4-6 (CS), but final system-level certification remains the responsibility of the end-equipment manufacturer. Reference designs meet Class B immunity with proper layout and grounding.
CY8C4126AZI-S423T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-LQFP
- 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, POR, PWM, WDT
- Number of I/O:
- 36
- 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:
- A/D 16x10b Slope, 16x12b SAR; D/A 2xIDAC
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4126AZI-S423T FAQ
1.How can I place an order for CY8C4126AZI-S423T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AZI-S423T 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 CY8C4126AZI-S423T reliable?
The price and inventory of CY8C4126AZI-S423T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AZI-S423T is usually 5 days.
3.What payment methods are accepted for CY8C4126AZI-S423T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AZI-S423T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AZI-S423T?
CY8C4126AZI-S423T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AZI-S423T 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 CY8C4126AZI-S423T?
For technical support, including CY8C4126AZI-S423T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AZI-S423T requirements.
6.How does Aetrix verify that CY8C4126AZI-S423T is sourced from the original manufacturer or authorized distributors?
All CY8C4126AZI-S423T 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 CY8C4126AZI-S423T meets industry standards.
7.What is the process for return or replacement of CY8C4126AZI-S423T?
All CY8C4126AZI-S423T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AZI-S423T, 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 CY8C4126AZI-S423T part is unused and in its original packaging.
Return procedure for CY8C4126AZI-S423T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C4126AZI-S423T Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
