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Infineon Technologies CY8C4745FNI-S402T
- Part No.:
- CY8C4745FNI-S402T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 25-XFBGA, WLCSP
- Datasheet:
-
CY8C4745FNI-S402T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 25WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,485
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Product details
Overview
CY8C4745FNI-S402T from Infineon Technologies (formerly Cypress) is a programmable 32-bit Arm Cortex-M0+ microcontroller in the PSoC 4700S family, integrating MagSense™ inductive sensing and CapSense® capacitive sensing on a single die. It features 48 MHz CPU operation, 32 KB flash, 4 KB SRAM, up to 16 inductive sensors, and dual reconfigurable SCBs supporting I²C/SPI/UART. It targets metal proximity detection in industrial HMI and touchless control systems.
For engineers reviewing the CY8C4745FNI-S402T datasheet, CY8C4745FNI-S402T pinout, CY8C4745FNI-S402T application, or CY8C4745FNI-S402T equivalent, key selection criteria include its integrated MagSense capability for sub-190 nm metal deflection detection, Deep Sleep current of 2.5 µA with operational analog, and SmartIO Boolean logic support for hardware-accelerated signal conditioning.
Technical Context
The device implements a single-layer AHB-Lite interconnect between the Cortex-M0+ core and peripherals including five TCPWM blocks, two low-power comparators active in Deep Sleep, and a programmable I/O subsystem with LCD segment drive capability. Clocking is managed by IMO (24–48 MHz, ±2%), ILO (40 kHz), and WCO (32 kHz), with fractional dividers enabling precise UART baud rate generation.
Analog functionality includes a single-slope 10-bit ADC, two current DACs (IDACs) referenced to ±5% internal voltage reference, and MagSense circuitry with automatic calibration software component. Digital flexibility is provided via two SmartIO ports supporting Boolean operations on GPIO signals without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz max - enables real-time sensor fusion with deterministic interrupt latency under 12 cycles. |
| Flash / SRAM | 32 KB flash with Read Accelerator, 4 KB zero-wait-state SRAM - supports firmware updates and runtime data buffering without performance penalty. |
| Inductive Sensing | Up to 16 MagSense channels, detects metal deflection <190 nm - enables high-resolution position sensing in sealed mechanical enclosures. |
| Capacitive Sensing | CapSense Sigma-Delta (CSD) with >5:1 SNR and water tolerance - allows reliable touch interface operation in humid or wet environments. |
| Power Modes | Deep Sleep at 2.5 µA with analog active - sustains continuous inductive/capacitive monitoring while preserving battery life in portable devices. |
| Communication | Two reconfigurable SCBs - each independently switchable between I²C, SPI, or UART at runtime, simplifying multi-protocol peripheral integration. |
| GPIO | 36 programmable pins, any configurable as analog/digital/capacitive, up to 16 as inductive - eliminates external signal conditioning ICs in mixed-sensing applications. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | Accepts 1.71–5.5 V; powers CPU, flash, SRAM, and all digital/analog blocks. |
| VSS | Digital ground | Reference return for digital logic and clock distribution network. |
| XRES | External reset input | Active-low asynchronous reset with internal pull-up; asserts full system reset on falling edge. |
| SWDCK / SWDIO | Debug interface | Two-pin Serial Wire Debug (SWD) for programming and real-time debugging without halting operation. |
| P0[0]–P0[7] | Programmable GPIO bank | Supports MagSense, CapSense, analog input, or digital I/O; configurable slew rate and drive strength. |
| SCB0_SDA / SCB0_SCL | I²C interface signals | Default I²C pins for first SCB; reassignable to SPI or UART via firmware configuration. |
Key Features
| Feature | Design Value |
|---|---|
| MagSense™ technology | Integrated inductive sensing front-end with automatic calibration software component compensates for PCB trace variation and temperature drift. |
| CapSense® CSD | Sigma-delta modulation architecture delivers >5:1 signal-to-noise ratio and immunity to water overlay, enabling outdoor or industrial touch interfaces. |
| SmartIO logic | Two dedicated ports perform Boolean operations (AND/OR/XOR) on GPIO inputs/outputs in hardware, offloading CPU for real-time signal preprocessing. |
| Deep Sleep analog retention | Low-power comparators and IDACs remain functional during 2.5 µA Deep Sleep mode, enabling continuous sensor wake-up without CPU involvement. |
| Reconfigurable SCBs | Each Serial Communication Block dynamically switches between I²C, SPI, and UART protocols at runtime - reduces BOM count and design complexity for multi-peripheral systems. |
Applications
| Industrial HMI Buttons | Sealed Proximity Sensors |
|---|---|
Use Scenario: Metal pushbuttons mounted behind stainless-steel panels in factory control cabinets. IC Role / Device Role / Timing Role: MCU + MagSense front-end performing inductive detection of actuator displacement and local UI processing. Use Value: Eliminates mechanical wear and ingress points; achieves <190 nm resolution for tactile feedback confirmation without physical contact. | Use Scenario: Non-contact position sensing of rotating shafts inside oil-filled gearboxes. IC Role / Device Role / Timing Role: Standalone inductive sensor node with Deep Sleep wake-on-event and UART reporting. Use Value: Operates continuously at 2.5 µA while detecting ferrous target movement, extending battery life beyond 10 years in wireless condition-monitoring nodes. |
| Water-Tolerant Touch Panels | Multi-Protocol Industrial Gateways |
Use Scenario: Outdoor kiosks exposed to rain and condensation in transportation hubs. IC Role / Device Role / Timing Role: Capacitive touch controller with CSD engine and SmartSense auto-tuning for dynamic environmental compensation. Use Value: Maintains >5:1 SNR and false-trigger immunity even with 2 mm water film overlay, avoiding costly external shielding or guard traces. | Use Scenario: Edge node aggregating data from legacy RS-485, I²C, and SPI field devices. IC Role / Device Role / Timing Role: Protocol translator using dual SCBs - one as SPI master to local sensors, one as UART-to-I²C bridge for upstream communication. Use Value: Single-chip solution replaces discrete level shifters and protocol converters, reducing footprint and qualification effort for industrial certifications. |
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 |
|---|---|---|---|
| CY8C4745FNI-S401T | Same package and core, but lacks MagSense support - no inductive sensing capability. | Restricted to capacitive-only or standard MCU applications without metal object detection. | Select only if MagSense is not required and cost reduction is prioritized over sensing versatility. |
| STM32G071KBT6 | No integrated capacitive or inductive sensing; requires external RC networks and firmware-based touch algorithms. | Higher development effort for touch/proximity functions; no hardware-accelerated MagSense or CapSense IP. | Choose when leveraging STM32 ecosystem tools and existing firmware investment outweighs need for integrated sensing acceleration. |
Compared with CY8C4745FNI-S401T and STM32G071KBT6, the CY8C4745FNI-S402T uniquely delivers production-ready MagSense and CapSense hardware engines with automatic calibration - reducing time-to-market for touchless HMI and eliminating external sensing components in metal-detection designs.
Availability
CY8C4745FNI-S402T is available at Aetrix Electronics and suitable for industrial HMI, sealed proximity sensing, water-tolerant touch panels, and multi-protocol industrial gateways requiring stable component supply and long-term lifecycle support.
Supply support for CY8C4745FNI-S402T 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 global semiconductor leader headquartered in Munich, Germany, delivering power systems, sensing, and microcontroller solutions for automotive, industrial, and IoT markets.
This device belongs to the PSoC 4700S product line - designed specifically to unify inductive and capacitive sensing in a single low-power MCU for robust, maintenance-free human-machine interfaces in harsh environments.
FAQ
What development tools are required to program CY8C4745FNI-S402T?
PSoC Creator IDE (free Windows-based tool) is required for schematic-driven hardware configuration and firmware development. It provides drag-and-drop component integration, automatic routing, and pre-verified APIs for MagSense, CapSense, TCPWM, and SCBs. Debugging uses standard ARM SWD via KitProg2 or MiniProg4 programmers.
Does CY8C4745FNI-S402T support hardware-accelerated encryption?
No. This device does not include cryptographic accelerators or secure boot features. It lacks AES, SHA, or TRNG hardware blocks. Security relies on software-based implementations or external secure elements. For applications requiring hardware crypto, consider Infineon's OPTIGA™ Trust family or PSoC 6 series.
Can all 36 GPIOs be used simultaneously for capacitive sensing?
No. While all GPIOs are configurable for CapSense, the PSoC 4700S hardware limits concurrent capacitive sensing to a maximum of 32 electrodes due to CSD block resource constraints. Up to 16 pins may be assigned to MagSense, and shared pins cannot operate in both modes simultaneously.
Is the 48-pin TQFP package RoHS-compliant and lead-free?
Yes. The CY8C4745FNI-S402T in 48-pin TQFP packaging meets RoHS Directive 2011/65/EU and is fully lead-free. The package uses matte tin finish on leads and complies with JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) for standard SMT assembly processes.
CY8C4745FNI-S402T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 25-XFBGA, WLCSP
- Series:
- PSOC™ 4 CY8C4700S
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- I2C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, UART/USART
- Peripherals:
- Brown-out Detect/Reset, LCD, LVD, POR, PWM, WDT
- Number of I/O:
- 21
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- A/D 16x10b; D/A 2x7b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4745FNI-S402T FAQ
1.How can I place an order for CY8C4745FNI-S402T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4745FNI-S402T 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 CY8C4745FNI-S402T reliable?
The price and inventory of CY8C4745FNI-S402T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4745FNI-S402T is usually 5 days.
3.What payment methods are accepted for CY8C4745FNI-S402T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4745FNI-S402T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4745FNI-S402T?
CY8C4745FNI-S402T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4745FNI-S402T 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 CY8C4745FNI-S402T?
For technical support, including CY8C4745FNI-S402T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4745FNI-S402T requirements.
6.How does Aetrix verify that CY8C4745FNI-S402T is sourced from the original manufacturer or authorized distributors?
All CY8C4745FNI-S402T 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 CY8C4745FNI-S402T meets industry standards.
7.What is the process for return or replacement of CY8C4745FNI-S402T?
All CY8C4745FNI-S402T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4745FNI-S402T, 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 CY8C4745FNI-S402T part is unused and in its original packaging.
Return procedure for CY8C4745FNI-S402T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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