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Infineon Technologies CY8C4127AXI-S445
- Part No.:
- CY8C4127AXI-S445
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
CY8C4127AXI-S445.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,545
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Product details
Overview
CY8C4127AXI-S445 from Infineon Technologies (acquired Cypress Semiconductor) is a 32-bit programmable system-on-chip (PSoC 4100S Plus) featuring an Arm® Cortex-M0+ CPU running at 48 MHz, 128 KB flash, 16 KB SRAM, integrated CapSense® capacitive sensing, CAN 2.0B interface, and 54 GPIOs in a 44-pin TQFP package. It delivers mixed-signal reconfigurability for embedded control with deep-sleep current as low as 2.5 µA while maintaining analog operation.
For engineers reviewing the CY8C4127AXI-S445 datasheet, CY8C4127AXI-S445 pinout, CY8C4127AXI-S445 application, or CY8C4127AXI-S445 equivalent, key selection criteria include its integrated CAN 2.0B block with Time-Triggered CAN support, 12-bit 1-Msps SAR ADC with sequencer, dual opamps operational in Deep Sleep, SmartSense™ auto-tuning for CapSense, and SWD debug interface with full security disable capability.
Technical Context
The device integrates a single-layer AHB-Lite interconnect linking CPU, memory, and peripherals including five reconfigurable Serial Communication Blocks (SCBs) supporting I²C/SPI/UART, eight 16-bit TCPWM blocks with quadrature decode and comparator-triggered kill signals, and a dedicated CAN 2.0B controller with TTCAN compliance. Clocking combines IMO (±2%), WCO (32 kHz), ECO (4–33 MHz), and PLL for precise timing across operating modes.
Analog subsystem includes two rail-to-rail opamps with high-drive external mode and internal high-bandwidth mode, a 12-bit SAR ADC with differential input and signal averaging, two IDACs usable on any GPIO, and two low-power comparators active in Deep Sleep. The CapSense v2 engine uses Sigma-Delta modulation with >5:1 SNR and water tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz, single-cycle multiply - enables real-time deterministic control with minimal latency |
| Flash / SRAM | 128 KB flash with Read Accelerator; 16 KB zero-wait-state SRAM - supports complex firmware with fast data access |
| ADC | 12-bit SAR, 1 Msps, differential/single-ended, channel sequencer with averaging - suitable for precision sensor acquisition |
| CapSense | Cypress CapSense Sigma-Delta (CSD) with SmartSense™ auto-tuning - eliminates manual calibration for robust touch interfaces |
| CAN Interface | CAN 2.0B compliant with Time-Triggered CAN (TTCAN) support - meets automotive and industrial network timing requirements |
| Low-Power Modes | Deep Sleep current = 2.5 µA with opamps and comparators active - enables battery-powered always-on sensing |
| GPIO Count | Up to 54 programmable pins with configurable drive strength, slew rate, and CapSense/analog/digital assignment - simplifies board layout and function reuse |
Pinout & Package
Package: 44-pin TQFP (0.8 mm pitch), RoHS-compliant, body size 10 × 10 mm, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 1.71–5.5 V single supply; powers all digital logic and analog blocks |
| VSS | Digital ground | Reference return path for digital circuitry and I/O drivers |
| P0[0]–P0[7] | Programmable GPIO | Support CapSense, analog input/output, SCB, TCPWM, or LCD segment drive |
| SWDCK / SWDIO | Debug interface | Two-wire Serial Wire Debug (SWD) for programming and full on-chip debugging |
| CAN_TX / CAN_RX | CAN physical layer interface | Dedicated differential pair for CAN 2.0B bus communication with TTCAN timing control |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Blocks | Two opamps + 12-bit SAR ADC + dual IDACs enable custom sensor front-ends without external components |
| SmartSense™ Auto-Tuning | Hardware-accelerated CapSense calibration reduces development time and improves field reliability across environmental variations |
| Secure Debug Disable | Firmware-controllable SWD disable with irreversible erasure requirement prevents unauthorized access to flash and IP |
| Time-Triggered CAN (TTCAN) | Hardware-supported deterministic scheduling of CAN messages for safety-critical motor control and industrial automation |
| Deep Sleep with Analog Active | 2.5 µA system current while retaining opamp, comparator, and CapSense functionality - extends battery life in wake-on-touch systems |
Applications
| Industrial HMI Panels | Automotive Body Control Modules |
|---|---|
Use Scenario: Touch-enabled operator interface on factory equipment with glove operation and moisture exposure. IC Role / Device Role / Timing Role: PSoC acts as main controller and capacitive touch processor; CAN block handles vehicle bus integration. Use Value: Single-chip solution replaces discrete MCU + touch controller + CAN transceiver, reducing BOM count and PCB area by 40%. | Use Scenario: Door module managing window lift, mirror fold, and interior lighting with fail-safe diagnostics. IC Role / Device Role / Timing Role: MCU executes control logic; TTCAN ensures synchronized actuator commands; Deep Sleep enables low-quiescent-current standby. Use Value: Integrated opamps condition hall-effect sensor signals; IDACs drive capacitive proximity detection for auto-window pinch protection. |
| Smart Home Thermostats | Medical Patient Monitoring Devices |
Use Scenario: Wall-mounted HVAC controller with glass-front touch interface and wireless gateway connectivity. IC Role / Device Role / Timing Role: Handles CapSense UI, temperature/humidity ADC acquisition, and UART-to-WiFi bridge via SCB. Use Value: SmartSense™ maintains touch accuracy across condensation and temperature drift; 128 KB flash hosts OTA update stack and UI assets. | Use Scenario: Portable vital sign monitor with ECG electrode interface and LED pulse oximetry. IC Role / Device Role / Timing Role: SAR ADC acquires analog biosignals; opamps provide programmable gain and filtering; IDACs bias electrodes. Use Value: Dual opamps operate in Deep Sleep to continuously monitor lead-off conditions while drawing <3 µA - extends battery runtime to 7 days. |
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 |
|---|---|---|---|
| STM32G071CB | No integrated CapSense or CAN; 64 MHz Cortex-M0+, 128 KB flash, but requires external touch controller and CAN transceiver | Lacks hardware-accelerated capacitive sensing and TTCAN - unsuitable for touch+CAN co-location | Select when cost-sensitive designs prioritize core MCU performance over integrated analog/CAN and can accommodate external components |
| RA4M2 (R7FA4M2AD3CFM) | 48 MHz Cortex-M33, 256 KB flash, 32 KB SRAM, no CapSense, CAN FD instead of CAN 2.0B/TTCAN | Higher security (TrustZone), CAN FD bandwidth, but no hardware touch engine - increases firmware complexity for touch UI | Select for future-proof CAN FD networks requiring secure boot and cryptographic acceleration, where touch is implemented via software-based algorithms |
Compared with STM32G071CB and RA4M2, CY8C4127AXI-S445 uniquely integrates CapSense v2 with SmartSense™, TTCAN, and Deep Sleep analog retention - enabling single-chip touch+control+network solutions in space-constrained, battery-sensitive applications.
Availability
CY8C4127AXI-S445 is available at Aetrix Electronics and suitable for industrial HMI panels, automotive body control modules, and smart home thermostats requiring stable component supply, long-term lifecycle assurance, and qualified production lots.
Supply support for CY8C4127AXI-S445 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. Infineon is a global semiconductor leader focused on power systems, automotive, and IoT applications.
CY8C4127AXI-S445 belongs to the PSoC 4100S Plus product line, designed specifically for ultra-low-power, mixed-signal embedded systems requiring integrated capacitive sensing, deterministic communication, and secure firmware execution in resource-constrained environments.
FAQ
Does CY8C4127AXI-S445 support USB connectivity?
No. CY8C4127AXI-S445 does not include a USB PHY or USB controller. It provides five reconfigurable Serial Communication Blocks (SCBs) supporting I²C, SPI, and UART only. For USB host or device functionality, external bridge ICs such as CY7C65215 must be used in conjunction with UART or SPI interfaces.
What is the maximum operating temperature for this device?
CY8C4127AXI-S445 is rated for industrial temperature range: –40 °C to +85 °C ambient. This rating applies to the 44-pin TQFP package (S445 suffix) under continuous operation with proper PCB thermal design and airflow per JEDEC JESD51 standards.
Can the CAN block operate independently of the CPU during Deep Sleep?
Yes. The CAN 2.0B block retains full message filtering, RX/TX buffering, and TTCAN scheduling capability in Deep Sleep mode. It can generate interrupts to wake the CPU upon message receipt or error condition while consuming only 2.5 µA system current - critical for always-on network nodes.
Is SmartSense™ tuning compatible with custom PCB layouts and overlay materials?
Yes. SmartSense™ operates entirely in hardware using on-chip IDACs and sigma-delta measurement. It adapts automatically to parasitic capacitance variations caused by overlay thickness, dielectric constant, and PCB trace geometry - validated across glass, plastic, and metal-backed overlays up to 10 mm thick.
CY8C4127AXI-S445 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 64-LQFP
- Series:
- PSOC™ 4 CY8C4100S Plus
- 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:
- 54
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K 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:
CY8C4127AXI-S445 FAQ
1.How can I place an order for CY8C4127AXI-S445 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4127AXI-S445 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 CY8C4127AXI-S445 reliable?
The price and inventory of CY8C4127AXI-S445 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4127AXI-S445 is usually 5 days.
3.What payment methods are accepted for CY8C4127AXI-S445?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4127AXI-S445 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4127AXI-S445?
CY8C4127AXI-S445 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4127AXI-S445 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 CY8C4127AXI-S445?
For technical support, including CY8C4127AXI-S445 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4127AXI-S445 requirements.
6.How does Aetrix verify that CY8C4127AXI-S445 is sourced from the original manufacturer or authorized distributors?
All CY8C4127AXI-S445 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 CY8C4127AXI-S445 meets industry standards.
7.What is the process for return or replacement of CY8C4127AXI-S445?
All CY8C4127AXI-S445 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4127AXI-S445, 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 CY8C4127AXI-S445 part is unused and in its original packaging.
Return procedure for CY8C4127AXI-S445:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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