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Infineon Technologies CY8C3666AXA-036
- Part No.:
- CY8C3666AXA-036
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3666AXA-036.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,841
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Product details
Overview
CY8C3666AXA-036 from Infineon (acquired Cypress Semiconductor) is an AEC-Q100 qualified automotive-grade PSoC® 3 programmable system-on-chip integrating an 8051 CPU core, 64 KB flash, 8 KB SRAM, 2 KB EEPROM, 24-channel DMA, full CAN 2.0b interface, USB 2.0 Full-Speed peripheral, and configurable analog/digital peripherals-including delta-sigma ADC (12-bit, 192 ksps), four opamps, four comparators, and four DACs-targeting embedded control in automotive body electronics and powertrain subsystems.
For engineers reviewing the CY8C3666AXA-036 datasheet, CY8C3666AXA-036 pinout, CY8C3666AXA-036 application, or CY8C3666AXA-036 equivalent, key selection criteria include AEC-Q100 Grade 2 (–40 °C to +105 °C), 100-pin TQFP package, CAN/USB dual-interface capability, 67 MHz max CPU clock, and on-chip CapSense® support for touch HMI in harsh environments.
Technical Context
The CY8C3666AXA-036 implements a single-cycle 8051 microcontroller core with up to 67 MHz operation, supported by a multilayer AHB bus, 24-channel DMA, and programmable chained descriptors for zero-CPU-overhead data movement between peripherals and memory. Its digital subsystem centers on 24 Universal Digital Blocks (UDBs), each combining PLD logic and state machines to implement custom or standard peripherals including UART, SPI, I²C, LIN, PWM, and quadrature decoders.
Analog functionality is anchored by a 1.024 V ±0.1% internal reference, a configurable delta-sigma ADC (8–12-bit, 192 ksps, 66 dB SINAD), four rail-to-rail opamps (25 mA drive), four comparators (95 ns response), and four multifunction SC/CT blocks usable as PGA, TIA, mixer, or sample-and-hold-routed flexibly across all 62 GPIOs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051, up to 67 MHz - enables deterministic real-time control with low interrupt latency. |
| Memory | 64 KB flash (100k write cycles, 20 yr retention), 8 KB SRAM, 2 KB EEPROM - supports firmware updates, data logging, and secure boot without external storage. |
| Operating Temp | –40 °C to +105 °C (AEC-Q100 Grade 2) - certified for under-hood and cabin-mounted automotive modules. |
| Analog ADC | Delta-sigma, 12-bit @ 192 ksps, 66 dB SINAD, ±1 LSB INL/DNL - suitable for high-accuracy sensor signal acquisition (e.g., pressure, temperature, current sensing). |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 FS (12 Mbps), I²C multimaster - enables direct integration into vehicle networks and diagnostic interfaces. |
| I/O System | 62 GPIOs + 8 SIO + 2 USBIO; any GPIO routable to any analog/digital peripheral; 1.2–5.5 V I/O domains - simplifies board layout and supports mixed-voltage subsystem interfacing. |
| Power Modes | 1 µA sleep (RTC + LVD active), 200 nA hibernate (RAM retention) - extends battery life in always-on automotive modules like door controllers or telematics. |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O Power Domains | Four independent 1.2–5.5 V supply rails enabling mixed-voltage interface with sensors, displays, and legacy ECUs. |
| P0[0]–P5[7] | General-Purpose I/O | 62 fully configurable GPIOs supporting CapSense®, analog routing, LCD drive (up to 46×16), and Schmitt-trigger inputs. |
| SIO0–SIO7 | Special I/O | 8 high-drive pins (25 mA sink) supporting analog/comparator inputs, USB D+/D–, and high-noise immunity signals. |
| XTAL1/XTAL2 | Clock Input | Supports 4–25 MHz crystal oscillator for precise timing; used with 32.768 kHz RTC crystal for timekeeping. |
| TCK/TMS/TDO/TDI | JTAG Debug Interface | 4-wire boundary scan and programming interface compatible with standard ICE tools and production programmers. |
| USB_DP/USB_DM | USB Physical Layer | Dedicated differential pair for USB 2.0 Full-Speed (12 Mbps); requires no external PHY - reduces BOM cost and footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array (24 blocks) | Enables hardware-level implementation of custom logic (e.g., protocol accelerators, glue logic) without FPGA or discrete ICs. |
| CapSense® on Any GPIO | Eliminates dedicated touch controller ICs; supports self-capacitive and mutual-capacitive sensing for buttons, sliders, and proximity detection. |
| Digital Filter Block (DFB) | 24-bit fixed-point FIR/IIR filtering at 67 MHz - processes ADC output in real time for noise suppression before CPU intervention. |
| Programmable Clock Tree | Multiple internal oscillators (IMO: 3–62 MHz; ILO: 1/33/100 kHz) + PLL + crystal options - allows dynamic clock scaling for performance/power trade-offs. |
| Hardware Security | Flash protection bits, read-out prevention, and secure bootloader - meets automotive functional safety requirements for firmware integrity. |
Applications
| Automotive Body Control Module | Smart Rearview Mirror System |
|---|---|
|
Use Scenario: Centralized control of door locks, window lifts, mirror adjustment, and interior lighting via LIN/CAN network. IC Role / Device Role / Timing Role: Main MCU executing real-time control algorithms, managing multiple analog sensor inputs (potentiometers, current sense), and driving motor drivers via PWM. Use Value: Integrates 62 GPIOs, 4 opamps, and CAN/UART/LIN in one chip - reduces component count by ≥30% vs. discrete MCU + interface IC solution. |
Use Scenario: Touch-enabled auto-dimming rearview mirror with ambient light sensing, glare detection, and Bluetooth pairing UI. IC Role / Device Role / Timing Role: Mixed-signal controller acquiring photodiode signals, running CapSense® touch overlay, and communicating over I²C to display driver and BLE module. Use Value: On-chip 12-bit ADC (66 dB SINAD) and CapSense® eliminate external ADC and touch controller - lowers EMI risk and improves EMC robustness. |
| Engine Coolant Temperature Monitor | Electric Power Steering (EPS) Sensor Interface |
|
Use Scenario: High-reliability temperature monitoring using NTC thermistors and RTDs in engine bay, with CAN reporting to ECU. IC Role / Device Role / Timing Role: Precision analog front-end with programmable gain amplifier (PGA), delta-sigma ADC, and cold-junction compensation for thermocouple inputs. Use Value: 0.1% voltage reference stability and <±1 LSB INL enable ±0.5 °C accuracy over –40 °C to +105 °C - meets ASAM MCD-2 MC calibration requirements. |
Use Scenario: Acquisition and preprocessing of torque sensor (Wheatstone bridge), motor phase current (shunt-based), and position encoder signals in EPS ECU. IC Role / Device Role / Timing Role: Real-time signal conditioner with 4-channel simultaneous sampling ADC, DFB-based filtering, and CAN message formatting. Use Value: 24-channel DMA + DFB offloads CPU from 90% of signal processing - frees 8051 core for safety-critical ASIL-B diagnostics and watchdog supervision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP S32K144 | ARM Cortex-M4F core, 112 MHz, 512 KB flash, no integrated CapSense® or DFB; requires external analog front-end for precision ADC. | Better suited for ASIL-B safety-critical control loops but lacks on-chip capacitive touch and analog filter acceleration. | Select when functional safety certification (ISO 26262) is mandatory and software-defined signal processing dominates design. |
| Renesas RL78/F14 | 16-bit RL78 core, 32 MHz, 256 KB flash, integrated 12-bit SAR ADC (1 Msps), no CAN FD or USB; limited GPIO routing flexibility. | Lower cost for basic body control, but lacks USB/CAN dual-interface capability and analog configurability (no PGA/TIA blocks). | Select for cost-sensitive, non-touch applications where CAN-only communication and moderate analog channel count suffice. |
Compared with S32K144 and RL78/F14, CY8C3666AXA-036 delivers unique value in rapid prototyping of mixed-signal automotive HMI and sensor fusion systems through its unified analog/digital reconfigurability, eliminating interface glue logic and reducing PCB layers while maintaining AEC-Q100 compliance.
Availability
CY8C3666AXA-036 is available at Aetrix Electronics and suitable for automotive body control modules, smart mirror systems, engine coolant monitors, and electric power steering sensor interfaces requiring stable component supply across extended lifecycle programs.
Supply support for CY8C3666AXA-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 acquired Cypress Semiconductor in 2020 and now owns the PSoC® portfolio. Infineon is a global semiconductor leader focused on power systems, automotive electronics, and security solutions.
The CY8C36 family belongs to Infineon's automotive-qualified PSoC® 3 platform, designed specifically for highly integrated, low-power, mixed-signal control in body electronics, chassis, and infotainment subsystems where analog configurability and interface flexibility reduce system complexity.
FAQ
Is CY8C3666AXA-036 pin-compatible with other CY8C36xx devices?
Yes - CY8C3666AXA-036 uses the 100-pin TQFP package shared across the CY8C3666x series. Pin functions are consistent within the same package variant, enabling drop-in replacement among members with identical pin count and I/O configuration (e.g., CY8C3666LTI-036). Always verify VDDIO domain assignments and reset pin behavior per specific ordering option.
Does CY8C3666AXA-036 support CAN FD?
No - CY8C3666AXA-036 implements only classical CAN 2.0b (up to 1 Mbps), not CAN FD. It provides 16 receive and 8 transmit message buffers with hardware acceptance filtering and automatic retransmission. For CAN FD, consider Infineon's newer TRAVEO™ T2G or AURIX™ families.
Can the onboard USB interface operate without an external crystal?
Yes - the USB 2.0 Full-Speed peripheral uses the internal IMO (Internal Main Oscillator) calibrated to ±0.25% accuracy, eliminating need for an external 12 MHz crystal. This reduces BOM cost and board space, and is validated per USB-IF TID#40770053 certification.
What development tools are required to program CY8C3666AXA-036?
PSoC Creator™ IDE (v3.3 or later) is required for schematic-based design, component configuration, and code generation. Programming is performed via MiniProg3 or KitProg2 debug probes using SWD or JTAG. No external programmer is needed - on-chip bootloader supports field updates via I²C, SPI, UART, or USB.
CY8C3666AXA-036 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C36xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3666AXA-036 FAQ
1.How can I place an order for CY8C3666AXA-036 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3666AXA-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 CY8C3666AXA-036 reliable?
The price and inventory of CY8C3666AXA-036 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3666AXA-036 is usually 5 days.
3.What payment methods are accepted for CY8C3666AXA-036?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3666AXA-036 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3666AXA-036?
CY8C3666AXA-036 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3666AXA-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 CY8C3666AXA-036?
For technical support, including CY8C3666AXA-036 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3666AXA-036 requirements.
6.How does Aetrix verify that CY8C3666AXA-036 is sourced from the original manufacturer or authorized distributors?
All CY8C3666AXA-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 CY8C3666AXA-036 meets industry standards.
7.What is the process for return or replacement of CY8C3666AXA-036?
All CY8C3666AXA-036 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3666AXA-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 CY8C3666AXA-036 part is unused and in its original packaging.
Return procedure for CY8C3666AXA-036:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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