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Infineon Technologies CY8C4045FNI-S412T
- Part No.:
- CY8C4045FNI-S412T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 25-XFBGA, WLCSP
- Datasheet:
-
CY8C4045FNI-S412T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 25WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,720
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Product details
Overview
CY8C4045FNI-S412T from Infineon is a 32-bit Arm® Cortex®-M0+ microcontroller with 48 MHz CPU, 32 KB flash, 4 KB SRAM, integrated CAPSENSE™ capacitive sensing, two SCBs supporting I²C/SPI/UART, and five 16-bit TCPWM blocks. It operates from 1.71–5.5 V and supports Deep Sleep mode at 2.5 µA digital current. Used in touch-enabled human-machine interfaces for industrial control panels.
For engineers reviewing the CY8C4045FNI-S412T datasheet, CY8C4045FNI-S412T pinout, CY8C4045FNI-S412T application, or CY8C4045FNI-S412T equivalent, key selection criteria include CAPSENSE™ SNR (>5:1), programmable analog (IDACs, comparators), TCPWM kill-signal triggering, and 48-pin TQFP package compatibility with PSoC™ Creator and ModusToolbox™ toolchains.
Technical Context
The device integrates a single-cycle multiply Arm® Cortex®-M0+ core with tightly coupled flash read accelerator and 8 KB ROM containing boot code and PDL initialization routines. System-level resources include SWD debug interface, NVIC with 32 interrupts, and configurable clock tree with IMO (±2%), WCO, and ILO oscillators.
Analog subsystem includes a capacitance-sensing sigma-delta ADC, two programmable IDACs (up to 2 mA each), and two low-power comparators operational in Deep Sleep. Digital fabric features five TCPWM blocks supporting center-aligned PWM and comparator-triggered kill signals, plus two reconfigurable SCBs and programmable logic blocks for Boolean port operations.
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 timing and sensor fusion. |
| Memory | 32 KB flash + 4 KB SRAM - sufficient for CAPSENSE™ firmware, communication stacks, and small RTOS deployments without external memory. |
| Capacitive Sensing | CAPSENSE™ v2 with >5:1 SNR and SmartSense auto-tuning - delivers robust touch detection under moisture or EMI without manual calibration. |
| Serial Interfaces | 2 × SCBs - runtime-reconfigurable as I²C, SPI, or UART; supports dual-protocol operation (e.g., I²C host + SPI peripheral) on same silicon. |
| PWM & Timing | 5 × 16-bit TCPWM blocks - support center-aligned PWM, dead-time insertion, and hardware kill-signal assertion via comparator input for motor safety. |
| Power Modes | Deep Sleep @ 2.5 µA digital + active analog - enables battery-powered touch interfaces with multi-year operation on coin cells. |
| GPIO | 36 programmable pins in 48-pin TQFP - all support CAPSENSE™, analog, or digital functions; drive strength and slew rate configurable per pin. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 1.71–5.5 V input; powers CPU, SRAM, and GPIO; requires local 100 nF decoupling. |
| GND | Ground reference | Dual GND pins (Pins 1, 24) reduce ground bounce in mixed-signal operation. |
| P0[0]–P0[7] | Port 0 GPIO | Support CAPSENSE™ CSD, analog input, or high-drive digital output; configurable slew rate. |
| SWDCLK / SWDIO | Debug interface | Two-pin Arm® Serial Wire Debug - enables full-chip programming and real-time debugging without JTAG header. |
| XRES | External reset | Active-low asynchronous reset; internal pull-up; compatible with pushbutton or supervisor IC reset signals. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense auto-tuning | Hardware-accelerated CAPSENSE™ calibration eliminates manual tuning across temperature/humidity and reduces BOM cost by removing trim components. |
| Programmable analog blocks | Two IDACs (0.125–2 mA range) and two Deep Sleep comparators enable low-power wake-on-touch and analog sensor front-end without external ICs. |
| Reconfigurable SCBs | Each SCB can be independently assigned I²C master/slave, SPI master/slave, or UART - simplifies protocol migration and reduces firmware complexity. |
| TCPWM kill-signal trigger | Comparator output directly asserts TCPWM kill input - provides sub-microsecond fault response for motor control and power conversion safety loops. |
| ModusToolbox™ + PSoC™ Creator support | Full API coverage for CAPSENSE™, TCPWM, SCB, and low-power modes - accelerates development with production-ready middleware and schematic-based design. |
Applications
| Industrial HMI Panels | Smart Appliance Touch Controls |
|---|---|
Use Scenario: Touch-sensitive operator interface on PLC-mounted control panel exposed to dust, vibration, and variable ambient light. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ scan, serial communication with PLC backplane, and LED backlight PWM timing. Use Value: >5:1 SNR ensures reliable touch detection through overlay glass; Deep Sleep mode extends panel uptime during idle periods without external RTC. | Use Scenario: Waterproof touch interface on refrigerator door with condensation and frequent hand-wipe exposure. IC Role / Device Role / Timing Role: Dedicated touch controller with integrated IDACs driving self-capacitance sensors and managing I²C communication to main appliance MCU. Use Value: SmartSense auto-tuning maintains consistent sensitivity across humidity shifts; comparator-based wake-on-touch minimizes average system power. |
| Medical Device Keypads | IoT Edge Sensor Nodes |
Use Scenario: Disinfectant-resistant touch keypad on portable infusion pump requiring FDA-compliant low-power operation. IC Role / Device Role / Timing Role: Safety-critical input processor validating touch inputs, enforcing debounce timing, and signaling status via UART to main controller. Use Value: Hardware kill-signal capability allows immediate PWM shutdown if touch fault detected; ROM-resident PDL ensures certified firmware integrity. | Use Scenario: Battery-powered environmental monitor with capacitive wake button, temperature/humidity sensing, and BLE connectivity. IC Role / Device Role / Timing Role: System orchestrator managing sensor acquisition, CAPSENSE™ wake, low-power timer events, and SCB-to-BLE module UART interface. Use Value: 2.5 µA Deep Sleep current enables >5-year battery life on CR2032; programmable IDACs eliminate external bias circuitry for analog sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable MCU with integrated capacitive sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4045LQI-S402 | Same core, 32 KB flash, but 40-pin QFN package and no WCO oscillator - lacks 32 kHz crystal support for precise RTC timing. | Suitable for space-constrained designs where crystal-less timekeeping is acceptable. | Select when board layout prioritizes footprint over long-term time accuracy or when using external RTC. |
| CY8C4146FNI-S433 | Higher-spec variant: 64 KB flash, 8 KB SRAM, additional SCB and TCPWM block - not pin-compatible; requires PCB redesign. | Required for complex firmware with Bluetooth LE stack or dual-interface communication protocols. | Choose only when scaling firmware beyond 32 KB or needing extra peripherals; not a drop-in replacement. |
Compared with CY8C4045LQI-S402 and CY8C4146FNI-S433, the CY8C4045FNI-S412T uniquely balances CAPSENSE™ performance, 48-pin TQFP manufacturability, WCO support for accurate timekeeping, and proven qualification for industrial HMI use cases - making it optimal for cost-sensitive, touch-first embedded systems.
Availability
CY8C4045FNI-S412T is available at Aetrix Electronics and suitable for industrial HMI panels, smart appliance touch controls, medical device keypads, and IoT edge sensor nodes requiring stable component supply, long-lifecycle support, and qualified automotive/industrial grade reliability.
Supply support for CY8C4045FNI-S412T 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 embedded solutions, with global R&D and manufacturing infrastructure.
This part belongs to the PSoC™ 4000S product line - designed specifically for cost-optimized, touch-centric embedded applications requiring integrated analog sensing, flexible digital peripherals, and seamless toolchain integration with ModusToolbox™ and PSoC™ Creator.
FAQ
Does CY8C4045FNI-S412T support USB communication?
No. This device does not include a USB PHY or USB controller. Communication is limited to the two SCBs configured as I²C, SPI, or UART. For USB connectivity, external bridge ICs (e.g., CP2102N) or migration to PSoC™ 4100S/4200S families with dedicated USBFS blocks is required.
What is the maximum operating temperature for continuous Deep Sleep mode?
The device is rated for industrial temperature range (–40 °C to +85 °C). Deep Sleep mode with active analog blocks is fully specified across this range; the 2.5 µA digital current value is guaranteed at +25 °C, while total system current remains below 10 µA at +85 °C with optimized configuration.
Can CAPSENSE™ operate while the CPU is in Deep Sleep?
Yes. CAPSENSE™ hardware block operates autonomously in Deep Sleep mode using the ILO or WCO clock source. Touch scanning and SmartSense auto-tuning continue without CPU intervention, and the device can generate an interrupt or wake event upon detection.
Is the 48-pin TQFP package lead-free and RoHS compliant?
Yes. The CY8C4045FNI-S412T uses a lead-free, RoHS-compliant 48-pin TQFP package (package code FNI) with matte tin finish, qualified to JEDEC J-STD-020 moisture sensitivity level 3 and IPC/JEDEC J-STD-033 handling requirements.
CY8C4045FNI-S412T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 25-XFBGA, WLCSP
- Series:
- PSOC™ 4 CY8C4000S
- 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, CapSense, 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 1x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4045FNI-S412T FAQ
1.How can I place an order for CY8C4045FNI-S412T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4045FNI-S412T 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 CY8C4045FNI-S412T reliable?
The price and inventory of CY8C4045FNI-S412T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4045FNI-S412T is usually 5 days.
3.What payment methods are accepted for CY8C4045FNI-S412T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4045FNI-S412T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4045FNI-S412T?
CY8C4045FNI-S412T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4045FNI-S412T 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 CY8C4045FNI-S412T?
For technical support, including CY8C4045FNI-S412T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4045FNI-S412T requirements.
6.How does Aetrix verify that CY8C4045FNI-S412T is sourced from the original manufacturer or authorized distributors?
All CY8C4045FNI-S412T 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 CY8C4045FNI-S412T meets industry standards.
7.What is the process for return or replacement of CY8C4045FNI-S412T?
All CY8C4045FNI-S412T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4045FNI-S412T, 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 CY8C4045FNI-S412T part is unused and in its original packaging.
Return procedure for CY8C4045FNI-S412T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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