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Infineon Technologies CY8C4126AZI-S423
- Part No.:
- CY8C4126AZI-S423
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
CY8C4126AZI-S423.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,584
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Product details
Overview
CY8C4126AZI-S423 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 operates from 1.71–5.5 V and supports deep-sleep mode with 2.5 µA system current, targeting human-interface and low-power embedded control applications.
For engineers reviewing the CY8C4126AZI-S423 datasheet, CY8C4126AZI-S423 pinout, CY8C4126AZI-S423 application, or CY8C4126AZI-S423 equivalent, this device is selected for designs requiring on-chip analog/digital reconfigurability, robust touch sensing in wet environments, and flexible peripheral routing without external components.
Technical Context
The CY8C4126AZI-S423 integrates a fixed-function Arm® Cortex®-M0+ core with programmable analog (two opamps, two comparators, 12-bit SAR ADC, IDACs) and digital (TCPWM, SCBs, PLD logic) subsystems. Its CAPSENSE™ sigma-delta engine delivers >5:1 SNR and hardware-accelerated SmartSense tuning.
It features five 16-bit TCPWM blocks supporting center-aligned PWM and quadrature decoding, plus three SCBs that can be independently configured as I²C master/slave, SPI master/slave, or UART. Clock sources include ±2% IMO, 32 kHz ILO, and WCO support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz - single-cycle multiply enables real-time control loop execution in motor or sensor fusion applications. |
| Memory | 64 KB flash + 8 KB SRAM - sufficient for bootloader, firmware, and runtime data buffers in standalone HMI or sensor node designs. |
| ADC | 12-bit SAR, 1 Msps, differential/single-ended - supports high-fidelity analog signal acquisition from sensors or transducers without external amplification. |
| CAPSENSE™ | Sigma-delta CSD with >5:1 SNR and water tolerance - enables reliable touch buttons/sliders in consumer appliances or industrial panels exposed to moisture. |
| Power Range | 1.71–5.5 V operation - allows direct interface with Li-ion batteries, USB 5 V, or 3.3 V logic without LDO overhead. |
| Deep Sleep Current | 2.5 µA system current - extends battery life in always-on touch interfaces or wireless sensor endpoints. |
| GPIO Count | Up to 36 programmable pins - any pin supports CAPSENSE™, analog input, or digital function with configurable drive strength and slew rate. |
Pinout & Package
This device is packaged in a 48-lead TQFP (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are fully reconfigurable via firmware; no fixed peripheral-to-pin mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains support independent analog/digital supply filtering; VDD must be ≥1.71 V for full functionality. |
| XRES | Active-low reset input | Asynchronous reset with internal pull-up; debounced externally for ESD-robust system initialization. |
| SWDCLK / SWDIO | ARM Serial Wire Debug interface | Two-pin debug port enabling programming and real-time trace without dedicated JTAG header footprint. |
| P0[0]–P0[7], P1[0]–P1[7], etc. | Programmable GPIO | Each pin supports CAPSENSE™ electrode, analog input, or digital I/O with software-selectable drive modes (open-drain, push-pull, high-Z). |
| XTAL_IN / XTAL_OUT | 32 kHz watch crystal oscillator terminals | Supports precision RTC timing and low-power wake-up events; requires external 32.768 kHz crystal with load capacitance matching. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable SCBs | Three independent serial blocks each configurable at runtime as I²C, SPI, or UART - eliminates need for multiple discrete interface ICs in multi-sensor systems. |
| SmartSense auto-tuning | Hardware-accelerated CAPSENSE™ calibration - reduces firmware development time and eliminates manual threshold tuning across temperature/humidity variations. |
| Programmable analog blocks | Two opamps with internal/external drive modes and ADC input buffering - enables sensor signal conditioning (e.g., bridge amplifier) without external opamp components. |
| Low-power comparators | Operate in Deep Sleep mode with <1 µA current - supports wake-on-event detection (e.g., voltage threshold breach) while maintaining ultra-low system sleep current. |
| LCD segment drive | Direct GPIO-based segment driving capability - enables simple character or icon LCD display control without dedicated display controller IC. |
Applications
| Home Appliance Control Panel | Industrial HMI Touch Interface |
|---|---|
Use Scenario: Touch-sensitive control panel on microwave oven or washing machine with water-resistant overlay. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ scanning, button debounce, display update, and appliance state control. Use Value: Hardware-based SmartSense ensures reliable touch detection under condensation or splashing, reducing false triggers and field returns. |
Use Scenario: Operator panel on PLC-mounted equipment requiring ESD-hardened, glove-compatible touch response. IC Role / Device Role / Timing Role: Real-time touch processor interfacing with RS-485 fieldbus via SCB-configured UART and managing local LED indicators. Use Value: Integrated 12-bit ADC reads analog sensor inputs (e.g., temperature, pressure), eliminating external signal conditioning for cost-sensitive industrial nodes. |
| Portable Medical Sensor Node | Smart Lighting Dimmer Module |
Use Scenario: Battery-powered wearable pulse oximeter with capacitive touch for mode selection and status indication. IC Role / Device Role / Timing Role: System-on-chip handling optical sensor signal acquisition (via IDAC-driven LED control and ADC sampling), touch input, and BLE interface management. Use Value: 2.5 µA Deep Sleep current extends coin-cell battery life beyond 12 months in standby, meeting Class II medical device requirements. |
Use Scenario: DALI-2 or 0–10 V dimmer module with physical touch slider and ambient light sensing. IC Role / Device Role / Timing Role: PWM generator for TRIAC/LED driver control, ambient light ADC reading, and capacitive slider position tracking. Use Value: Five TCPWM blocks enable simultaneous phase-cut dimming, fade timing, and LED status blink patterns without CPU intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4127AZI-S433 | Same architecture with 128 KB flash, 16 KB SRAM, and additional SCB - no change in package or pinout. | Required when firmware size exceeds 64 KB or dual-CAN/I²C coexistence is needed. | Select for future-proofing firmware growth or added peripheral concurrency; identical layout and debug interface. |
| STM32G071KBT6 | Arm Cortex-M0+, 64 KB flash, 20 KB SRAM, but lacks integrated CAPSENSE™ and programmable analog blocks. | Suitable for non-touch applications needing higher SRAM or USB-CDC interface; requires external touch controller for HMI. | Choose when USB connectivity or larger RAM buffer is prioritized over on-chip analog reconfigurability and touch intelligence. |
Compared with CY8C4127AZI-S433, this part trades flash/SRAM headroom for lower BOM cost and identical footprint; versus STM32G071KBT6, it delivers integrated capacitive sensing and analog signal chain flexibility-reducing component count and PCB area in touch-centric designs.
Availability
CY8C4126AZI-S423 is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI interfaces, portable medical sensor nodes, and smart lighting dimmer modules requiring stable component supply and long-term manufacturability.
Supply support for CY8C4126AZI-S423 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 manufacturer specializing in power management, automotive ICs, and embedded controllers, with global manufacturing and quality certification to ISO 9001 and IATF 16949.
This device belongs to the PSoC™ 4100S family - designed specifically for cost-sensitive, low-power human-machine interface applications requiring integrated capacitive sensing, analog signal conditioning, and flexible digital peripheral routing.
FAQ
Does CY8C4126AZI-S423 support USB communication?
No. This device lacks a USB PHY and does not support native USB communication. It provides three SCBs configurable as I²C, SPI, or UART only. For USB connectivity, external bridge ICs (e.g., CP2102N) or migration to PSoC™ 4000S/4100S+ variants with USBFS are required.
What is the maximum operating temperature for CY8C4126AZI-S423?
The CY8C4126AZI-S423 is rated for industrial temperature range: –40 °C to +85 °C ambient. The "ZI" suffix denotes this grade, validated per Infineon's qualification standards for extended thermal reliability in enclosed enclosures or uncooled industrial environments.
Can the internal opamps drive an external ADC reference buffer?
Yes. Each of the two continuous-time opamps supports high-drive external mode with rail-to-rail output and unity-gain stability into 100 pF + 10 kΩ loads - sufficient for buffering precision references (e.g., REF3025) feeding external SAR or delta-sigma ADCs.
Is ModusToolbox™ required to develop firmware for this device?
No. While ModusToolbox™ is Infineon's recommended modern IDE with CMSIS-Packs and middleware, legacy PSoC™ Creator (v4.4 or earlier) remains fully supported. Both tools generate identical binary output compatible with the device's boot ROM and SWD interface.
CY8C4126AZI-S423 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-LQFP
- Series:
- PSOC™ 4 CY8C4100S
- Packaging:
- Tray
- 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-S423 FAQ
1.How can I place an order for CY8C4126AZI-S423 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AZI-S423 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-S423 reliable?
The price and inventory of CY8C4126AZI-S423 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AZI-S423 is usually 5 days.
3.What payment methods are accepted for CY8C4126AZI-S423?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AZI-S423 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AZI-S423?
CY8C4126AZI-S423 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AZI-S423 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-S423?
For technical support, including CY8C4126AZI-S423 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AZI-S423 requirements.
6.How does Aetrix verify that CY8C4126AZI-S423 is sourced from the original manufacturer or authorized distributors?
All CY8C4126AZI-S423 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-S423 meets industry standards.
7.What is the process for return or replacement of CY8C4126AZI-S423?
All CY8C4126AZI-S423 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AZI-S423, 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-S423 part is unused and in its original packaging.
Return procedure for CY8C4126AZI-S423:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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