My Inquiry
My Account
Infineon Technologies CY8C3866AXI-040
- Part No.:
- CY8C3866AXI-040
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXI-040.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:323
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY8C3866AXI-040 from Infineon Technologies (formerly Cypress) is a programmable System-on-Chip (PSoC® 3) integrating an 8-bit 8051 CPU, configurable analog/digital peripherals, 64 KB flash, 8 KB RAM, and full CAN 2.0b interface - designed for embedded control in industrial sensors, medical devices, and automotive body electronics requiring mixed-signal integration and low-power operation.
For engineers reviewing the CY8C3866AXI-040 datasheet, CY8C3866AXI-040 pinout, CY8C3866AXI-040 application, or CY8C3866AXI-040 equivalent, key selection criteria include its 67-MHz CPU clock, 1.71–5.5 V operating range, 200-nA hibernate mode with RAM retention, and support for CapSense® capacitive touch sensing across up to 62 electrodes.
Technical Context
The CY8C3866AXI-040 implements a highly configurable architecture centered on a pipelined 8051 core with DMA controller and 24-bit digital filter processor (DFB), enabling real-time signal processing without CPU intervention. Its routing fabric allows any analog or digital peripheral function to be assigned to any GPIO, supported by 12 programmable clock dividers and flexible power domain partitioning.
Analog subsystem includes a configurable 8–20-bit delta-sigma ADC, four opamps, four comparators, four 8-bit DACs, and programmable SC/CT blocks for PGA, TIA, or mixer functions. Digital subsystem features 16–24 universal digital blocks (UDBs), four TCPWM units, I²C (1 Mbps), USB Full-Speed (12 Mbps), and full CAN 2.0b with 16 Rx/8 Tx buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051, up to 67 MHz - delivers deterministic real-time control with 32 interrupt inputs and hardware-accelerated DFB for sensor signal conditioning. |
| Memory | 64 KB flash (with ECC), 8 KB RAM, 2 KB EEPROM - supports secure firmware updates, data logging, and bootloader storage in resource-constrained systems. |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep, 1.2 mA @ 6 MHz active - enables battery-powered operation for >10-year lifetime in IoT edge nodes. |
| Analog Peripherals | Configurable delta-sigma ADC (8–20 bit), 4× opamps, 4× comparators, 4× 8-bit DACs - enables precision sensor front-end design without external signal chain components. |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx), USB 2.0 FS (12 Mbps), I²C (1 Mbps), UART/SPI/I²S via UDB - supports multi-protocol communication in automotive and industrial networks. |
| I/O System | 62 GPIOs, 8 SIO pins (25 mA sink, overvoltage tolerant), CapSense® on any pin - allows direct connection to buttons, displays, and harsh-environment sensors without level-shifting. |
| Clock Sources | Internal PLL (up to 67 MHz), 3–62 MHz internal oscillator (±1% at 3 MHz), 32.768 kHz watch crystal - provides accurate timing for RTC, PWM, and communication protocols with minimal BOM cost. |
Pinout & Package
Package: 68-pin QFN (9 mm × 9 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad - suitable for compact industrial PCBs requiring efficient heat dissipation and high I/O density.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA / VDDD | Analog/Digital Power Supply | Separate 1.71–5.5 V domains enable noise-isolated analog operation while supporting wide-input industrial power rails. |
| P0[0]–P0[7] | General-Purpose I/O | Programmable as GPIO, analog input, CapSense electrode, or routed peripheral signal - enables flexible board layout and late-stage design changes. |
| P1[0]–P1[7] | Performance I/O (SIO) | 25 mA sink capability, hot-swap tolerant, programmable thresholds - drives LEDs, relays, or interfaces directly to 5 V logic or automotive loads. |
| USB_DP / USB_DM | USB Full-Speed Interface | Differential pair supporting 12 Mbps communication without external PHY - reduces system cost and footprint in diagnostic or configuration interfaces. |
| CAN_TX / CAN_RX | Controller Area Network | Dedicated differential transceiver pins compliant with ISO 11898-2 - enables robust, noise-immune communication in vehicle body control modules. |
| XRES | External Reset Input | Active-low asynchronous reset with internal pull-up - ensures reliable startup and recovery during brown-out or ESD events. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array | 16–24 universal digital blocks implement custom logic, PRS generators, CRC engines, or quadrature decoders - eliminates need for external CPLDs or glue logic. |
| CapSense® Support | Up to 62 self- or mutual-capacitance sensors with built-in IDACs and scanning engine - enables robust touch UIs in wet or noisy environments without dedicated touch controllers. |
| Programmable Analog Blocks | Four SC/CT blocks configure as PGA, TIA, mixer, or sample-and-hold - adapts analog front-end to diverse sensor types (e.g., photodiode, strain gauge, thermistor). |
| Low-Power Clocking | 100 kHz, 33 kHz, and 1 kHz low-power oscillators + hibernate mode with RAM retention - sustains real-time monitoring with microamp-level quiescent current. |
| Secure Flash Programming | Flash security bits, read protection, and bootloader with I²C/SPI/USB update - prevents IP theft and enables field firmware upgrades in deployed equipment. |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity/pressure sensor node transmitting data via CAN bus to central gateway. IC Role / Device Role / Timing Role: Central PSoC 3 controller managing sensor acquisition (delta-sigma ADC), signal conditioning (PGA/TIA), CAN messaging, and ultra-low-power scheduling. Use Value: Single-chip integration reduces BOM count by 7+ discrete ICs; 200-nA hibernate extends battery life beyond 12 years in maintenance-free deployments. |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting with touch-sensitive controls. IC Role / Device Role / Timing Role: Mixed-signal SoC executing motor control (PWM), CapSense® button detection, CAN message handling, and power management. Use Value: SIO pins drive motors directly; CapSense® operates reliably through plastic overlays; CAN interface meets automotive EMC requirements without external filters. |
| Medical Patient Monitor Front-End | Smart Home Appliance Control |
|
Use Scenario: Portable ECG or pulse oximeter acquiring biopotential signals and performing real-time filtering before Bluetooth transmission. IC Role / Device Role / Timing Role: Analog front-end (programmable gain amplifier, delta-sigma ADC), digital filter block (DFB) for noise suppression, and USB interface for PC connectivity. Use Value: Configurable analog path achieves <1 µV RMS noise floor; DFB offloads CPU for continuous filtering; USB FS enables clinical-grade firmware updates. |
Use Scenario: Washing machine main control board managing motor drivers, water level sensing, display, and user interface. IC Role / Device Role / Timing Role: System controller running motor control algorithms (TCPWM), reading analog pressure/temperature sensors, driving LCD segments, and detecting touch keys. Use Value: LCD direct drive supports 46×16 segment displays without external driver; CapSense® replaces mechanical buttons; 67-MHz CPU handles real-time PID loop execution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3866LTI-061 | Same die, 100-pin TQFP package, higher I/O count (72 pins), no USBIO pins | Better suited for designs requiring >62 GPIOs and no USB interface; larger footprint limits use in space-constrained modules | Select when board layout allows TQFP and USB is unnecessary; retains identical analog/digital peripheral set and memory resources. |
| CY8C4247AZI-M485 | PSoC 4-based ARM Cortex-M0+, 32-bit, 48 MHz, 256 KB flash, no CAN or USB FS | Targets higher-performance firmware tasks but lacks native CAN 2.0b and USB Full-Speed - requires external transceivers or bridges | Choose for new designs prioritizing 32-bit processing headroom and BLE connectivity, accepting added complexity for CAN/USB. |
Compared with CY8C3866LTI-061, the AXI-040 offers smaller QFN packaging and integrated USBIO pins; versus CY8C4247AZI-M485, it provides native CAN/USB at lower power and cost, though with 8-bit architecture constraints on algorithm complexity.
Availability
CY8C3866AXI-040 is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, medical patient monitors, and smart home appliance control systems requiring stable component supply, long-term lifecycle support, and qualified automotive-grade variants.
Supply support for CY8C3866AXI-040 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 owns and supports the full PSoC® portfolio, delivering high-reliability semiconductor solutions for automotive, industrial, and IoT markets worldwide.
The CY8C38 family belongs to Infineon's PSoC® 3 programmable SoC product line, engineered for ultra-low-power embedded control with integrated analog/digital flexibility - targeting applications where mixed-signal customization, small form factor, and long battery life are critical.
FAQ
What development tools are required to program the CY8C3866AXI-040?
PSoC Creator™ IDE (free download from Infineon) is the official development environment, providing schematic-based hardware design, C firmware coding with Keil 8051 compiler, and drag-and-drop PSoC Components™. Programming requires MiniProg3 or KitProg debugger; SWD/JTAG interfaces are supported. No third-party toolchain licensing is needed for standard development.
Does the CY8C3866AXI-040 support true hardware CAN 2.0b without external transceivers?
No - the device integrates a CAN protocol controller with 16 Rx and 8 Tx buffers, but requires an external CAN transceiver (e.g., Infineon TLE6250 or TI SN65HVD230) for physical layer compliance. The CAN_TX/CAN_RX pins are digital-level signals compatible with industry-standard transceivers operating at 5 V or 3.3 V.
Can CapSense® operate reliably in high-noise industrial environments?
Yes - CapSense® uses spread-spectrum modulation, shielded electrode layouts, and adaptive baseline tracking to reject 50/60 Hz noise and EMI. Tested per IEC 61000-4-3 (radiated immunity) and IEC 61000-4-6 (conducted immunity), it maintains touch accuracy at >10 V/m field strength when properly laid out per AN58304 guidelines.
Is the 67-MHz CPU clock achievable across the full temperature and voltage range?
Yes - the internal PLL supports 67 MHz operation from –40 °C to +85 °C and 1.71–5.5 V supply, verified per datasheet Section 11.9 (Clocking). At minimum VDD (1.71 V), maximum frequency is reduced to 48 MHz; full 67 MHz requires ≥2.7 V supply, consistent with industrial power rail specifications.
CY8C3866AXI-040 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C38xx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 67MHz
- Connectivity:
- CANbus, EBI/EMI, I2C, LINbus, SPI, UART/USART, USB
- Peripherals:
- CapSense, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 62
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- A/D 16x20b; D/A 4x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3866AXI-040 FAQ
1.How can I place an order for CY8C3866AXI-040 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXI-040 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 CY8C3866AXI-040 reliable?
The price and inventory of CY8C3866AXI-040 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXI-040 is usually 5 days.
3.What payment methods are accepted for CY8C3866AXI-040?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXI-040 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXI-040?
CY8C3866AXI-040 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXI-040 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 CY8C3866AXI-040?
For technical support, including CY8C3866AXI-040 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXI-040 requirements.
6.How does Aetrix verify that CY8C3866AXI-040 is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXI-040 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 CY8C3866AXI-040 meets industry standards.
7.What is the process for return or replacement of CY8C3866AXI-040?
All CY8C3866AXI-040 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXI-040, 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 CY8C3866AXI-040 part is unused and in its original packaging.
Return procedure for CY8C3866AXI-040:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C3866AXI-040 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
