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Infineon Technologies CY8C3666AXI-036
- Part No.:
- CY8C3666AXI-036
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3666AXI-036.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:315
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Product details
Overview
CY8C3666AXI-036 from Infineon Technologies is a PSoC™ 3 programmable system-on-chip featuring an 8051 CPU core, 64 KB flash memory, 8 KB SRAM, and integrated analog/mixed-signal peripherals including 20-bit delta-sigma ADC, programmable logic (PLD), CapSense® capacitive sensing, and up to 68 GPIOs. It operates at 67 MHz with supply voltage range 1.71–5.5 V and supports industrial temperature range (–40°C to +85°C). Used in human-machine interface (HMI) modules requiring robust touch control and sensor integration.
For engineers reviewing the CY8C3666AXI-036 datasheet, CY8C3666AXI-036 pinout, CY8C3666AXI-036 application, or CY8C3666AXI-036 equivalent, key selection criteria include its CapSense® accuracy under noise, configurable analog routing, flash endurance (100K cycles), and compatibility with PSoC Creator™ IDE for rapid HMI firmware development.
Technical Context
The CY8C3666AXI-036 implements a single-cycle 8051 CPU with hardware multiplier and DMA controller, enabling real-time sensor processing without CPU overhead. Its analog subsystem includes two independent SAR ADCs (12-bit, 1 Msps), one delta-sigma ADC (20-bit, 125 sps), four op-amps, two comparators, and a programmable IDAC (0.1–12 mA).
Digital resources comprise up to 24 UDBs (Universal Digital Blocks) supporting custom logic, state machines, or communication protocols (e.g., I²C, SPI, UART), plus dedicated USB 2.0 full-speed controller with on-chip transceiver and 1.5 kΩ pull-up resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8051, 67 MHz max - enables deterministic real-time control with <1 µs interrupt latency. |
| Flash Memory | 64 KB - sufficient for complex HMI firmware with CapSense® tuning, USB stack, and sensor fusion. |
| SRAM | 8 KB - supports dual-buffered USB endpoints and real-time ADC data streaming. |
| CapSense® Channels | Up to 68 - allows large multi-touch panels or proximity + slider + button combinations in one chip. |
| Delta-Sigma ADC | 20-bit, 125 sps - delivers high-resolution temperature/pressure sensing without external sigma-delta converter. |
| USB Interface | Full-speed (12 Mbps), integrated PHY - eliminates external transceiver and reduces BOM cost and layout complexity. |
| Operating Temp | –40°C to +85°C - qualified for industrial control panels and automotive cabin interfaces. |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | GPIO / CapSense® CSD | Configurable as digital I/O or mutual-capacitance touch sensors with shield and sense capability. |
| P1[0]–P1[7] | GPIO / Analog Input | Supports SAR ADC input, op-amp inputs/outputs, and comparator references. |
| USB_DP / USB_DM | USB Differential Pair | Direct connection to USB connector; internal 1.5 kΩ pull-up on D+ enables enumeration without external resistor. |
| VDDA / VSSA | Analog Power/Ground | Separate analog domain ensures ADC and CapSense® performance unaffected by digital switching noise. |
| XRES | External Reset Input | Active-low asynchronous reset with internal pull-up; debounced via internal circuitry for reliable power-on initialization. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Blocks | Four op-amps, two comparators, and IDACs configurable as transimpedance amps or current sources for sensor signal conditioning. |
| CapSense® CSD v3.0 | Supports proximity, gesture, and water-tolerant touch with automatic baseline tracking and noise immunity up to 20 Vpp. |
| UDB-Based Logic | 24 Universal Digital Blocks enable custom PWM generators, counters, or protocol engines without CPU intervention. |
| Hardware USB Stack | Integrated USB controller with descriptor handling and endpoint buffers reduces firmware overhead and improves enumeration reliability. |
| Flash Security | Read protection, secure boot, and flash lock bits prevent unauthorized firmware extraction or modification in deployed systems. |
Applications
| Industrial HMI Panel | Automotive Cabin Control |
|---|---|
Use Scenario: Touch-enabled operator interface for PLC-based machinery with metal enclosure and EMI exposure. IC Role / Device Role / Timing Role: Primary MCU managing CapSense® buttons/sliders, analog sensor acquisition (temperature, pressure), and USB host communication for configuration updates. Use Value: Single-chip integration eliminates external ADC, touch controller, and USB transceiver, reducing PCB area by 35% and bill-of-materials cost by $1.80/unit. | Use Scenario: Climate control panel in passenger vehicle with glove-box proximity detection and rotary encoder emulation. IC Role / Device Role / Timing Role: Dedicated HMI processor handling capacitive touch, ambient light sensing, and LIN bus communication via software UART. Use Value: CapSense® water tolerance (up to 2 mm condensation) and –40°C startup ensure reliable operation across global automotive environments. |
| Medical Patient Monitor UI | Smart Home Thermostat |
Use Scenario: Front-panel interface for bedside vital sign display with sterile-glove operation and ESD immunity requirements. IC Role / Device Role / Timing Role: Real-time touch controller with 20-bit delta-sigma ADC for thermistor-based temperature measurement and isolated communication via optocoupled UART. Use Value: 20-bit ADC resolution enables ±0.1°C temperature accuracy without calibration, meeting IEC 60601-1 Class II leakage limits. | Use Scenario: Wall-mounted thermostat with multi-zone HVAC control, humidity sensing, and local display refresh. IC Role / Device Role / Timing Role: System-on-chip executing CapSense® touch, I²C humidity/temperature sensor interface, and segmented LCD driver via GPIO-controlled segment mapping. Use Value: Integrated op-amps condition analog humidity signals directly, avoiding external signal-conditioning IC and improving long-term drift stability. |
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 |
|---|---|---|---|
| CY8C3866AXI-040 | Same architecture, 128 KB flash, 16 KB SRAM, identical pinout - higher memory density only. | Suitable for larger firmware images (e.g., embedded web server, OTA update stack) but same peripheral set. | Select when firmware exceeds 64 KB or future scalability is required; no change to schematic or layout. |
| PSOC™ 4200DS (CY8C4247LQI-M485) | Arm® Cortex®-M0 core, 256 KB flash, 32 KB SRAM, CapSense® v4.0, but no delta-sigma ADC or USB PHY. | Better for low-power battery devices needing BLE connectivity (via external module), less suited for USB-HID or high-resolution analog sensing. | Choose for new designs prioritizing Arm ecosystem and BLE integration; requires external USB transceiver and external ADC for 20-bit precision. |
Compared with CY8C3666AXI-036, the CY8C3866AXI-040 offers memory headroom without design changes, while the PSOC™ 4200DS trades USB/delta-sigma integration for Arm compatibility and BLE readiness - making the CY8C3666AXI-036 optimal for cost-sensitive, USB-connected industrial HMIs requiring high-precision analog sensing.
Availability
CY8C3666AXI-036 is available at Aetrix Electronics and suitable for industrial HMI panels, automotive cabin controls, medical patient monitor interfaces, and smart home thermostats requiring stable component supply, long-lifecycle support, and qualified industrial temperature grade.
Supply support for CY8C3666AXI-036 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 ICs, and embedded controllers, with global manufacturing and quality certification to ISO/TS 16949 and AEC-Q200.
This device belongs to the legacy PSoC™ 3 family, designed specifically for cost-optimized, highly integrated human-machine interface applications where analog flexibility, capacitive touch, and USB connectivity converge in a single chip.
FAQ
What development tools are required for CY8C3666AXI-036 firmware creation?
PSoC™ Creator™ IDE (v3.3 or later) is mandatory for configuring analog/digital blocks, generating CapSense® tuning parameters, and building firmware. The kit requires a MiniProg3 or KitProg programmer/debugger; no third-party toolchains are supported due to proprietary UDB and analog routing compilation.
Does CY8C3666AXI-036 support true hardware USB HID device class without firmware intervention?
Yes - it includes a dedicated USB controller with built-in descriptors, endpoint buffers, and interrupt handlers for HID keyboard/mouse/report descriptor compliance. Firmware only configures report structures and handles data callbacks; enumeration, SOF, and token handling are fully hardware-managed.
Can CapSense® operate reliably through 3 mm thick glass overlay?
Yes - with proper electrode design (e.g., 10 mm × 10 mm pads, 5 mm gap) and firmware tuning (scan speed, IDAC current, averaging), the device achieves stable detection through 3 mm glass. Reference design AN76115 validates this using default CSD v3.0 settings and standard PCB stackup.
Is there hardware support for AES encryption in CY8C3666AXI-036?
No - this device lacks dedicated cryptographic accelerators. Secure operations rely on software libraries (e.g., Mbed TLS port) running on the 8051 core, limiting throughput to ~15 KB/s for AES-128-CBC. For hardware-accelerated crypto, consider PSOC™ 6 or AURIX™ families.
CY8C3666AXI-036 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C36xx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 67MHz
- Connectivity:
- 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 16x12b; D/A 4x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3666AXI-036 FAQ
1.How can I place an order for CY8C3666AXI-036 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3666AXI-036 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 CY8C3666AXI-036 reliable?
The price and inventory of CY8C3666AXI-036 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3666AXI-036 is usually 5 days.
3.What payment methods are accepted for CY8C3666AXI-036?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3666AXI-036 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3666AXI-036?
CY8C3666AXI-036 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3666AXI-036 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 CY8C3666AXI-036?
For technical support, including CY8C3666AXI-036 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3666AXI-036 requirements.
6.How does Aetrix verify that CY8C3666AXI-036 is sourced from the original manufacturer or authorized distributors?
All CY8C3666AXI-036 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 CY8C3666AXI-036 meets industry standards.
7.What is the process for return or replacement of CY8C3666AXI-036?
All CY8C3666AXI-036 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3666AXI-036, 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 CY8C3666AXI-036 part is unused and in its original packaging.
Return procedure for CY8C3666AXI-036:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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