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Infineon Technologies CY8C3666AXA-037
- Part No.:
- CY8C3666AXA-037
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3666AXA-037.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,891
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Product details
Overview
CY8C3666AXA-037 from Infineon Technologies (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. It operates from 1.71 V to 5.5 V across –40 °C to +85 °C and supports CapSense®, LCD direct drive, and delta-sigma ADC up to 12-bit/192 ksps - used in automotive body control modules requiring mixed-signal integration and firmware-upgradable functionality.
For engineers reviewing the CY8C3666AXA-037 datasheet, CY8C3666AXA-037 pinout, CY8C3666AXA-037 application, or CY8C3666AXA-037 equivalent, key selection considerations include its AEC-Q100 qualification, on-chip CAN+USB dual-interface capability, 67 MHz max CPU clock, 24 UDB-based digital blocks, and support for analog signal acquisition with <±1 LSB INL/DNL at 12-bit resolution.
Technical Context
The CY8C3666AXA-037 implements a single-cycle 8051 microcontroller core with up to 67 MHz operation, 512-byte flash cache, and ECC-protected flash configuration storage. Its digital subsystem uses 24 universal digital blocks (UDBs) with DSI routing to enable flexible peripheral instantiation including CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 FS (TID#40770053 certified), and four 16-bit timer/counter/PWM blocks.
Analog functionality centers on a configurable delta-sigma ADC (8–12-bit, 192 ksps, 66 dB SINAD), four comparators (95 ns response), four opamps (25 mA drive), and four SC/CT blocks supporting PGA, TIA, mixer, and sample-and-hold configurations - all referenced to a 1.024 V ±0.1% internal voltage reference over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running up to 67 MHz - enables deterministic real-time control with hardware multiply/divide instructions. |
| Memory | 64 KB flash (100K write cycles, 20-year retention), 8 KB SRAM, 2 KB EEPROM (1M cycles) - supports robust firmware updates and data logging in automotive ECUs. |
| Analog ADC | Configurable delta-sigma ADC: 12-bit mode, 192 ksps, ±1 LSB INL/DNL, 66 dB SINAD - suitable for high-accuracy thermocouple or pressure sensor interfaces. |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 Full-Speed (12 Mbps, internal oscillator), I²C multimaster - enables dual-bus vehicle network node design without external transceivers. |
| Operating Range | –40 °C to +85 °C ambient, 1.71 V to 5.5 V supply - meets automotive cabin and under-hood environmental requirements per AEC-Q100 Grade 2. |
| Power Modes | 1 µA sleep (RTC + LVD active), 200 nA hibernate (RAM retention) - extends battery life in always-on automotive modules like door controllers. |
| I/O System | 62 GPIOs + 8 SIO + 2 USBIO; any GPIO routable to analog/digital peripherals; CapSense® on all GPIOs - allows flexible sensor/button integration and layout optimization. |
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 |
|---|---|---|
| VDDA, VDDD | Analog/Digital Power Supply | Separate 1.71–5.5 V domains enable noise-isolated analog signal conditioning while powering digital logic. |
| P0[0]–P0[7], P1[0]–P1[7], etc. | General-Purpose I/O | All 62 GPIOs support analog input routing, CapSense®, LCD segment drive, and configurable drive strength (25 mA sink on SIO). |
| CAN_TX, CAN_RX | CAN Bus Interface | Dedicated differential pair pins for CAN 2.0b physical layer connection - requires external CAN transceiver for bus termination and isolation. |
| USBDP, USBDM | USB 2.0 Full-Speed Differential Pair | On-chip USB PHY supports plug-and-play diagnostics and firmware updates via standard USB cable without external PHY. |
| XIN, XOUT | Crystal Oscillator Input/Output | Supports 4–25 MHz crystal for precise timing; internal PLL generates up to 67 MHz system clock with ppm-level stability. |
| SWDIO, SWCLK | Serial Wire Debug Interface | 2-wire debug port enabling non-intrusive firmware debugging, trace capture, and secure programming in production environments. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array (24 blocks) | Enables hardware-accelerated digital logic (e.g., LIN, PRS, CRC) without CPU overhead - reduces latency in time-critical automotive messaging. |
| Delta-Sigma ADC with Programmable Gain | Gain range ×0.25 to ×16 allows direct interfacing with mV-range sensors (e.g., strain gauges) without external amplifiers. |
| CapSense® on All GPIOs | Enables capacitive touch buttons/sliders using any I/O pin - eliminates dedicated touch controller ICs in human-machine interface designs. |
| Integrated USB 2.0 FS PHY | Eliminates need for external USB transceiver; supports device enumeration and HID/CDC class drivers out-of-box via PSoC Creator™. |
| AEC-Q100 Qualified (Grade 2) | Validated for automotive use across temperature, ESD, and reliability stress tests - reduces qualification effort for Tier 1 suppliers. |
Applications
| Automotive Body Control Module | Smart Lighting Controller |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, mirrors, and interior lighting in modern vehicles. IC Role / Device Role / Timing Role: Main MCU managing CAN bus communication with gateway, executing sensor fusion (CapSense® + analog temp/pressure inputs), and driving PWM-controlled LED lighting. Use Value: Integrates CAN, USB, analog sensing, and CapSense® into one die - reduces BOM count by 3–5 discrete ICs and simplifies PCB layout. | Use Scenario: Adaptive headlight and interior ambient lighting with dimming, color mixing, and fault reporting. IC Role / Device Role / Timing Role: Real-time PWM generation (four 16-bit blocks), current monitoring via IDACs, and thermal derating using on-die temperature sensor. Use Value: On-chip 8-Msps IDACs drive LED strings directly; 25 mA SIO sink capability supports high-brightness indicator LEDs without external drivers. |
| Automotive HVAC Control Panel | Electronic Parking Brake (EPB) Actuator |
Use Scenario: Touch-enabled climate control interface with fan speed regulation, temperature feedback, and display backlighting. IC Role / Device Role / Timing Role: CapSense® front-end for button/slider detection, delta-sigma ADC for NTC thermistor reading, and LCD segment driver for monochrome display. Use Value: Single-chip solution replaces separate touch controller, ADC, and display driver - lowers system cost and improves EMI immunity. | Use Scenario: Motorized parking brake actuation with position sensing, motor current monitoring, and fail-safe torque control. IC Role / Device Role / Timing Role: High-precision current measurement (ADC + IDAC), quadrature decoding for motor position, and CAN-based status reporting to chassis domain controller. Use Value: 95 ns comparator response enables fast overcurrent shutdown; 24-channel DMA offloads sensor data handling from CPU during critical braking events. |
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 |
|---|---|---|---|
| Infineon CY8C3866AXI-040 | Same PSoC 3 architecture, 100-pin TQFP, but extended temperature range (–40 °C to +125 °C) and higher flash ECC coverage (8 KB vs. 8 KB config storage only). | Targeted at under-hood applications (e.g., engine control ancillaries) where ambient exceeds +85 °C. | Select when operating temperature exceeds +85 °C or enhanced ECC for safety-critical code storage is required. |
| NXP S32K144HAT0MLHT | ARM Cortex-M4F core, 512 KB flash, CAN FD, no integrated analog ADC or CapSense® - requires external signal conditioning. | Designed for ASIL-B functional safety compliance; lacks on-chip mixed-signal flexibility but offers higher compute throughput. | Select when functional safety certification (ISO 26262) is mandatory and analog integration is handled externally. |
Compared with CY8C3666AXA-037, CY8C3866AXI-040 extends thermal capability and ECC scope for harsher environments, while S32K144HAT0MLHT trades analog configurability for ARM-based safety features and CAN FD - making it suitable for different automotive subsystem tiers.
Availability
CY8C3666AXA-037 is available at Aetrix Electronics and suitable for automotive body control modules, smart lighting systems, HVAC control panels, and electronic parking brake actuators requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for CY8C3666AXA-037 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 IoT solutions.
The CY8C36 family belongs to Infineon's automotive-qualified PSoC 3 platform, designed specifically for cost-sensitive, mixed-signal automotive applications requiring reconfigurable analog/digital peripherals, CAN/USB connectivity, and rapid firmware iteration - targeting body electronics and comfort systems.
FAQ
Is CY8C3666AXA-037 pin-compatible with other CY8C36 devices?
Yes - CY8C3666AXA-037 uses the 100-pin TQFP package shared across CY8C3666 variants. Pin functions are consistent within the same package option, though peripheral enablement (e.g., USB, CAN) depends on specific part number configuration per Cypress' ordering matrix. Always verify enabled features against the device-specific datasheet section "Ordering Information".
Does CY8C3666AXA-037 support USB device enumeration without external components?
Yes - it integrates a certified USB 2.0 Full-Speed PHY (TID#40770053) and supports enumeration using only passive termination resistors (1.5 kΩ pull-up on USBDP). No external transceiver or oscillator is needed; the internal IMO provides sufficient accuracy for USB FS timing requirements.
What development tools are required to program and debug CY8C3666AXA-037?
PSoC Creator™ IDE (v3.3 or later) is required for schematic-based design and firmware generation. Programming and debugging use KitProg or MiniProg3 programmers via SWD or JTAG. The device supports real-time trace with 4 KB instruction buffer and eight address breakpoints - enabling cycle-accurate analysis of CAN message timing and interrupt latency.
Can the delta-sigma ADC operate simultaneously with the DFB for real-time filtering?
Yes - the ADC output can feed the Digital Filter Block (DFB) directly via DMA without CPU intervention. The DFB supports 48-bit MAC operations per cycle and up to 64-tap FIR/IIR filters, enabling real-time noise suppression for sensor signals such as wheel speed or cabin air quality measurements.
CY8C3666AXA-037 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:
- CANbus, 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 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-037 FAQ
1.How can I place an order for CY8C3666AXA-037 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3666AXA-037 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-037 reliable?
The price and inventory of CY8C3666AXA-037 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3666AXA-037 is usually 5 days.
3.What payment methods are accepted for CY8C3666AXA-037?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3666AXA-037 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3666AXA-037?
CY8C3666AXA-037 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3666AXA-037 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-037?
For technical support, including CY8C3666AXA-037 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3666AXA-037 requirements.
6.How does Aetrix verify that CY8C3666AXA-037 is sourced from the original manufacturer or authorized distributors?
All CY8C3666AXA-037 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-037 meets industry standards.
7.What is the process for return or replacement of CY8C3666AXA-037?
All CY8C3666AXA-037 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3666AXA-037, 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-037 part is unused and in its original packaging.
Return procedure for CY8C3666AXA-037:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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