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Infineon Technologies CY8C4126AZQ-S423
- Part No.:
- CY8C4126AZQ-S423
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
CY8C4126AZQ-S423.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,270
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Product details
Overview
CY8C4126AZQ-S423 from Infineon is a programmable 32-bit Arm® Cortex®-M0+ microcontroller with 64 KB flash, 8 KB SRAM, and integrated CAPSENSE™ capacitive sensing. It delivers 48 MHz CPU performance, supports 1.71–5.5 V operation, and features three reconfigurable serial communication blocks (I²C/SPI/UART), five 16-bit TCPWMs, and two opamps with deep-sleep analog capability - deployed in human-interface touch panels and industrial control HMI systems.
For engineers reviewing the CY8C4126AZQ-S423 datasheet, CY8C4126AZQ-S423 pinout, CY8C4126AZQ-S423 application, or CY8C4126AZQ-S423 equivalent, key selection criteria include its dual-mode SAR ADC (12-bit, 1-Msps), SmartSense™ automatic tuning for water-tolerant touch, configurable GPIO drive strength, and ModusToolbox™/PSoC™ Creator toolchain support for rapid analog-digital system integration.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with programmable analog (CTB opamps, SAR ADC, CSD sigma-delta engine) and digital (TCPWM, SCB, PLD) subsystems. Its clock system combines ±2% IMO, 32 kHz ILO, and WCO for precision timing across sleep/wake cycles.
Capacitive sensing uses a dedicated sigma-delta modulator achieving >5:1 SNR and hardware-accelerated SmartSense™ auto-tuning - enabling robust touch detection under moisture without firmware intervention. All 36 GPIOs support CAPSENSE™, analog input, or programmable digital logic routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 48 MHz max - enables real-time deterministic control with single-cycle multiply for motor or sensor fusion tasks. |
| Memory | 64 KB flash (with read accelerator), 8 KB SRAM - sufficient for embedded GUI stacks and CAPSENSE™ firmware with runtime reconfiguration. |
| ADC | 12-bit SAR, 1-Msps, differential/single-ended, sequencer + averaging - supports high-fidelity sensor acquisition with noise rejection in noisy industrial environments. |
| CAPSENSE™ | Sigma-delta CSD engine with >5:1 SNR and SmartSense™ auto-tuning - eliminates manual calibration and maintains reliability under condensation or splashing water. |
| Power Modes | Deep Sleep at 2.5 µA system current with operational analog - extends battery life in portable HMIs while retaining touch readiness. |
| Serial Interfaces | 3 × SCBs supporting I²C/SPI/UART concurrently - allows simultaneous communication with displays, sensors, and host controllers without external bridges. |
| TCPWM Blocks | 5 × 16-bit Timer/Counter/PWM units with center-aligned, quadrature decode, and comparator-triggered kill - suitable for BLDC motor control and LED dimming. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | General-purpose GPIO / CAPSENSE™ / Analog Input | Configurable as touch sense pins, ADC inputs, or digital I/O with programmable slew rate and drive strength (2–8 mA). |
| P1[0]–P1[7] | GPIO / SCB0 SDA/SCL / TCPWM0 | Supports I²C master/slave, SPI slave, or PWM output; usable for display interface or sensor bus expansion. |
| P2[0]–P2[7] | GPIO / SCB1 UART TX/RX / TCPWM1 | Enables asynchronous serial debug or host communication; also routes to timer capture/compare functions. |
| P3[0]–P3[7] | GPIO / SCB2 SPI MOSI/MISO / TCPWM2 | Provides full-duplex SPI for flash memory or peripheral daisy-chaining; supports hardware-triggered PWM updates. |
| VDD / VSS | Power supply / Ground | Single 1.71–5.5 V rail; decoupling required per datasheet layout guidelines to maintain analog integrity during CAPSENSE™ operation. |
| XRES | Active-low reset input | Asynchronous reset pin with internal pull-up; accepts 1.2–5.5 V logic levels and supports external watchdog assertion. |
| SWDIO / SWCLK | ARM Serial Wire Debug interface | Two-pin debug port for programming, real-time trace, and low-overhead firmware update without halting CPU execution. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Subsystem | Two CTB opamps operate in Deep Sleep mode with ADC input buffering - enables always-on touch wake-up with sub-µA analog path leakage. |
| Reconfigurable Digital Logic | PLD blocks perform Boolean operations on GPIOs without CPU intervention - offloads debouncing, edge detection, or state-machine logic from firmware. |
| LCD Segment Drive | Up to 32 segments driven directly from GPIOs - eliminates external LCD driver IC in cost-sensitive consumer HMIs and appliance displays. |
| Smart I/O | Hardware-based signal conditioning (inversion, masking, synchronization) on any GPIO - reduces ISR latency and jitter in time-critical interrupt handling. |
| ModusToolbox™ Integration | Pre-validated CAPSENSE™ middleware and PDL drivers - cuts touch firmware development from weeks to hours with production-ready auto-tuning profiles. |
Applications
| Home Appliance Control Panel | Industrial HMI Terminal |
|---|---|
|
Use Scenario: Touch-enabled oven/microwave front panel with moisture-prone environment and button-free UI. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ scan, display refresh, and safety interlock monitoring via TCPWM kill signals. Use Value: SmartSense™ auto-tuning maintains reliable touch detection under steam or spills; 2.5 µA Deep Sleep extends battery backup runtime during power loss. |
Use Scenario: DIN-rail mounted factory floor terminal with resistive/capacitive overlay and RS-485 connectivity. IC Role / Device Role / Timing Role: System controller managing CAN/I²C sensor network, local touch interface, and real-time alarm response via comparator-triggered TCPWM shutdown. Use Value: Three SCBs enable concurrent I²C sensor polling, UART debug, and SPI display update - eliminating bus arbitration delays in deterministic control loops. |
| Medical Patient Monitor UI | Smart Building Thermostat |
|
Use Scenario: CE-certified bedside monitor with glove-compatible touch, ECG signal conditioning, and low-power standby. IC Role / Device Role / Timing Role: Dual-role processor: CAPSENSE™ front-end for UI and SAR ADC front-end for analog medical sensor acquisition. Use Value: Shared analog resources (opamps + ADC) reduce BOM count; 12-bit SAR with channel sequencer supports multi-sensor synchronized sampling. |
Use Scenario: Battery-powered HVAC thermostat with ambient light sensing, temperature feedback, and capacitive buttons. IC Role / Device Role / Timing Role: Low-power system-on-chip handling touch wake-up, thermistor ADC reads, and Zigbee/Bluetooth coexistence via GPIO-controlled RF enable. Use Value: Deep Sleep current of 2.5 µA enables 5+ year coin-cell operation; IDACs provide precise current sourcing for 4–20 mA loop simulation or sensor biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4026AZI-S423 | Same PSoC™ 4100S architecture but with 32 KB flash, 4 KB SRAM, and no LCD drive capability. | Targeted at simpler touch-only applications without display or complex firmware; lacks TCPWM quadrature decode. | Select when BOM cost reduction is critical and memory footprint remains under 28 KB with no segment LCD requirement. |
| STM32G071KBT6 | Arm® Cortex®-M0+, 64 KB flash, but no integrated CAPSENSE™ or programmable analog; requires external touch controller. | Used where standardized HAL-based firmware and broad ecosystem support outweigh need for hardware-accelerated touch. | Choose when leveraging ST's CubeMX toolchain and existing STM32 firmware libraries is prioritized over analog reconfigurability. |
Compared with CY8C4126AZQ-S423, CY8C4026AZI-S423 trades memory and LCD capability for lower unit cost in basic touch applications, while STM32G071KBT6 shifts capacitive sensing to external components - increasing PCB area and firmware complexity but improving vendor diversification and toolchain familiarity.
Availability
CY8C4126AZQ-S423 is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI terminals, medical patient monitor UIs, and smart building thermostats requiring stable component supply across multi-year production cycles.
Supply support for CY8C4126AZQ-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 MCUs, and secure connectivity solutions, with global manufacturing and quality certifications including ISO/TS 16949 and ISO 9001.
CY8C4126AZQ-S423 belongs to the PSoC™ 4100S product line - designed specifically for cost-sensitive, low-power embedded systems requiring integrated capacitive touch, programmable analog, and Arm®-based real-time control in a single chip.
FAQ
Does CY8C4126AZQ-S423 support USB connectivity?
No, CY8C4126AZQ-S423 does not include a USB PHY or USB controller. It relies on external USB-to-UART bridge ICs (e.g., CP2102) for host communication. The device's three SCBs support only I²C, SPI, and UART protocols natively - confirmed in the "Serial Communication Block" section of the 002-00122 Rev. *Q datasheet.
What is the maximum operating temperature for this part?
CY8C4126AZQ-S423 is rated for industrial temperature range: –40 °C to +85 °C ambient. This specification is validated per JEDEC JESD22-A108 and documented in Section 5.2 ("Device Level Specifications") of the official datasheet, with thermal derating applied above 70 °C for sustained 48 MHz operation.
Can the SAR ADC perform simultaneous sampling on multiple channels?
No, the 12-bit SAR ADC has a single conversion core and uses a hardware channel sequencer for time-multiplexed sampling. It supports up to 32-channel sequencing with programmable sample-and-hold timing and signal averaging per channel - but true simultaneous sampling across channels is not supported per Section 2.3.1 and Table 5-17 of the datasheet.
Is SmartSense™ tuning compatible with custom PCB layouts?
Yes, SmartSense™ operates independently of layout geometry and automatically adjusts baseline, finger threshold, and noise filters based on real-time raw count analysis. It supports flexible electrode shapes and spacing, and its tuning algorithm is embedded in the CAPSENSE™ Component v3.x middleware - verified across >200 customer designs using PSoC™ Creator and ModusToolbox™.
CY8C4126AZQ-S423 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-LQFP
- Series:
- PSOC™ 4 CY8C4100S
- Packaging:
- Bulk
- 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, LVD, 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, 16x12b SAR; D/A 2x7b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4126AZQ-S423 FAQ
1.How can I place an order for CY8C4126AZQ-S423 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AZQ-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 CY8C4126AZQ-S423 reliable?
The price and inventory of CY8C4126AZQ-S423 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AZQ-S423 is usually 5 days.
3.What payment methods are accepted for CY8C4126AZQ-S423?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AZQ-S423 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AZQ-S423?
CY8C4126AZQ-S423 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AZQ-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 CY8C4126AZQ-S423?
For technical support, including CY8C4126AZQ-S423 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AZQ-S423 requirements.
6.How does Aetrix verify that CY8C4126AZQ-S423 is sourced from the original manufacturer or authorized distributors?
All CY8C4126AZQ-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 CY8C4126AZQ-S423 meets industry standards.
7.What is the process for return or replacement of CY8C4126AZQ-S423?
All CY8C4126AZQ-S423 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AZQ-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 CY8C4126AZQ-S423 part is unused and in its original packaging.
Return procedure for CY8C4126AZQ-S423:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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