My Inquiry
My Account
Infineon Technologies CY8C3866AXI-206T
- Part No.:
- CY8C3866AXI-206T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXI-206T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,708
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY8C3866AXI-206T 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 sensing, medical instrumentation, and low-power HMI systems.
For engineers reviewing the CY8C3866AXI-206T datasheet, CY8C3866AXI-206T pinout, CY8C3866AXI-206T application, or CY8C3866AXI-206T equivalent, key selection criteria include its 67-MHz operation, 1.71–5.5 V supply range, 200-nA hibernate mode, CapSense® support for up to 62 sensors, and USB 2.0 Full-Speed peripheral capability with internal oscillator.
Technical Context
The CY8C3866AXI-206T implements a mixed-signal SoC architecture centered on an enhanced 8051 core with DMA and a 24-bit digital filter processor (DFB). Its routing fabric enables any analog or digital peripheral function-including four TCPWM blocks, I²C, SPI, UART, and LIN-to be assigned to any GPIO.
It integrates a programmable analog subsystem with delta-sigma ADC (8–20-bit), four opamps, four comparators, four 8-bit DACs, and configurable SC/CT blocks for PGA, TIA, mixer, and sample-and-hold functions - all controllable via firmware and routed through a unified I/O matrix supporting up to 72 pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051 running up to 67 MHz with 32 interrupt inputs and hardware multiplier |
| Memory | 64 KB flash (with ECC support), 8 KB SRAM, 2 KB EEPROM - enabling secure firmware storage and runtime data retention |
| Power Modes | Active (1.2 mA @ 6 MHz), Sleep (1 µA), Hibernate (200 nA with RAM retention) - optimized for battery-powered edge nodes |
| Analog Peripherals | Configurable 8–20-bit delta-sigma ADC, four 8-bit DACs, four opamps, four comparators - supports precision sensor signal chain integration |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 FS (12 Mbps, TID#40770053 certified), I²C (1 Mbps), four TCPWM blocks - suitable for real-time industrial comms |
| I/O System | Up to 72 pins including 62 GPIOs, 8 SIOs (25 mA sink, overvoltage tolerant), USBIO pins, and LCD direct drive (46×16 segments) |
| Operating Range | 1.71–5.5 V supply, –40°C to +85°C ambient - supports wide-input industrial power rails and extended temperature deployment |
Pinout & Package
Package: 68-pin QFN (9 mm × 9 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced for sustained 67-MHz operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDD | Power supply domains | Independent analog/digital power rails enable noise isolation and multi-voltage system interfacing |
| P0[0]–P0[7], P1[0]–P1[7], etc. | General-purpose I/O | Configurable as GPIO, analog input/output, or routed peripheral signals (e.g., CAN TX/RX, USB D+/D−) |
| XRES | External reset input | Active-low asynchronous reset with internal pull-up; compatible with pushbutton or microcontroller-driven reset sequencing |
| XTAL_IN / XTAL_OUT | Crystal oscillator terminals | Supports 4–25 MHz external crystal for precise clocking; optional internal PLL multiplication to 67 MHz |
| USB_DP / USB_DM | USB 2.0 Full-Speed differential pair | On-chip transceiver with internal termination - eliminates need for external PHY or resistors in standard USB device designs |
| SWDCK / SWDIO | Serial Wire Debug interface | 2-wire debug port supporting programming, real-time trace, and breakpoints without JTAG overhead |
Key Features
| Feature | Design Value |
|---|---|
| CapSense® capacitive sensing | Supports up to 62 self- or mutual-capacitance sensors with built-in IDACs and shield drivers - enables robust touch/HMI without external ICs |
| Programmable analog blocks | Four SC/CT blocks configurable as PGA, TIA, mixer, or sample-and-hold - allows front-end signal conditioning for current/voltage/impedance measurements |
| Digital filter processor (DFB) | 24-bit, 64-tap fixed-point engine for real-time FIR/IIR filtering - offloads CPU for sensor data preprocessing in vibration or audio applications |
| Flexible clocking system | Multiple sources (internal oscillators at 1/33/100 kHz, 3–62 MHz ±1%, external crystal, PLL) with 12 dividers routable to any peripheral - simplifies timing domain partitioning |
| UDB-based programmability | 24 universal digital blocks (UDBs) enabling custom logic (e.g., CRC, PRS, quadrature decoder, gate-level functions) - replaces discrete glue logic and reduces BOM count |
Applications
| Industrial Sensor Node | Medical Patient Monitor |
|---|---|
Use Scenario: Standalone environmental sensor node measuring temperature, humidity, and gas concentration with local display and CAN bus reporting. IC Role / Device Role / Timing Role: Central controller managing analog sensor acquisition (ADC + PGA), digital comms (CAN + I²C), CapSense buttons, and low-power sleep/wake scheduling. Use Value: Single-chip integration eliminates external ADC, CAN transceiver, and touch controller - reducing PCB area by >35% and enabling coin-cell operation via 200-nA hibernate mode. |
Use Scenario: Portable ECG front-end with lead-off detection, analog filtering, and Bluetooth LE gateway interface. IC Role / Device Role / Timing Role: Analog signal conditioner (TIA + 20-bit ADC + digital filter) and BLE host controller coordinating data streaming and button UI. Use Value: On-chip 20-bit delta-sigma ADC with programmable gain and DFB-based noise suppression achieves <1 µV RMS input-referred noise - meeting AAMI EC11 clinical accuracy requirements. |
| Smart Home HMI Panel | Automotive Body Control Module |
Use Scenario: Wall-mounted thermostat with capacitive touch keys, LCD display, ambient light sensing, and Zigbee/Thread radio interface. IC Role / Device Role / Timing Role: CapSense manager, LCD segment driver (46×16), ambient ADC input, and UART-to-radio bridge. Use Value: Integrated CapSense and LCD direct drive eliminate dedicated touch and display controllers - cutting component count by 3 and enabling 1.71-V operation from single alkaline cell. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting with LIN communication and fault diagnostics. IC Role / Device Role / Timing Role: LIN 2.0 master node with PWM motor control (TCPWM), analog voltage monitoring (Vbat, temp), and wake-on-LIN event handling. Use Value: Four independent TCPWM blocks and LIN physical layer support enable concurrent motor control and comms - eliminating need for separate LIN transceiver and motor driver ICs. |
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-065 | Same core and peripherals, but 100-pin TQFP package and higher max operating frequency (67 MHz vs. 67 MHz); lacks USBIO pins | Preferred for high-pin-count designs requiring more GPIOs or thermal mass; unsuitable where USB device functionality is required | Select when board layout requires TQFP mechanical compatibility and USB is not needed |
| CY8C4247LQI-BL483 | PSoC 4-based (ARM Cortex-M0+), lower power (150 nA hibernate), no CAN or USB FS; adds BLE radio | Better suited for Bluetooth-connected IoT endpoints; cannot replace CAN/USB-dependent legacy systems | Choose for new wireless sensor designs prioritizing ultra-low power and BLE, not CAN/USB migration |
Compared with CY8C3866LTI-065 and CY8C4247LQI-BL483, the CY8C3866AXI-206T uniquely balances legacy industrial interface support (CAN + USB FS) with analog precision (20-bit ADC, PGA, TIA) and proven 8051 toolchain maturity - making it optimal for upgrading existing PSoC 3-based systems or designing CAN-linked medical devices.
Availability
CY8C3866AXI-206T is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical instruments, smart home HMI panels, and automotive body control modules requiring stable component supply, long-term lifecycle assurance, and qualified production lots.
Supply support for CY8C3866AXI-206T 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-performance, configurable mixed-signal solutions for industrial, automotive, and consumer markets.
The CY8C38 family belongs to Infineon's PSoC 3 product line - engineered for ultra-low-power embedded control with integrated analog signal conditioning, programmable digital logic, and industry-standard interfaces like CAN and USB.
FAQ
Does CY8C3866AXI-206T support USB device functionality without external components?
Yes. The part integrates a certified USB 2.0 Full-Speed (12 Mbps) transceiver with internal termination resistors and oscillator, enabling plug-and-play USB device operation using only the onboard USB_DP/USB_DM pins and standard USB cable - no external PHY, resistors, or crystal required.
What is the maximum resolution and sampling rate of the delta-sigma ADC?
The delta-sigma ADC supports configurable resolution from 8 to 20 bits. At 20-bit resolution, typical sampling rate is 125 SPS; at 12-bit resolution, it reaches up to 200 kSPS. Effective number of bits (ENOB) is 18.2 at 20-bit mode with internal reference and proper layout per AN57821.
Can the 24 UDBs implement custom serial protocols beyond UART/SPI/I²C?
Yes. Each UDB contains PAL/PLD logic and a state machine engine, allowing implementation of custom protocols such as DALI, DMX512, SENT, or proprietary bit-stream formats. PSoC Creator provides graphical design entry and boolean primitives to synthesize logic directly into the UDB array without firmware overhead.
Is CapSense® operation supported on all GPIO pins?
Yes. All general-purpose I/O pins (up to 62) support CapSense® scanning in self-capacitance or mutual-capacitance mode. Dedicated IDACs, shield drivers, and CSD (CapSense Sigma-Delta) block are integrated - no external components needed for button, slider, or proximity sensing.
CY8C3866AXI-206T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C38xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 67MHz
- Connectivity:
- EBI/EMI, I2C, LINbus, SPI, UART/USART
- 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 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3866AXI-206T FAQ
1.How can I place an order for CY8C3866AXI-206T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXI-206T 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-206T reliable?
The price and inventory of CY8C3866AXI-206T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXI-206T is usually 5 days.
3.What payment methods are accepted for CY8C3866AXI-206T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXI-206T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXI-206T?
CY8C3866AXI-206T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXI-206T 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-206T?
For technical support, including CY8C3866AXI-206T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXI-206T requirements.
6.How does Aetrix verify that CY8C3866AXI-206T is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXI-206T 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-206T meets industry standards.
7.What is the process for return or replacement of CY8C3866AXI-206T?
All CY8C3866AXI-206T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXI-206T, 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-206T part is unused and in its original packaging.
Return procedure for CY8C3866AXI-206T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C3866AXI-206T 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
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
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.
