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Infineon Technologies CY8C3666AXI-037
- Part No.:
- CY8C3666AXI-037
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3666AXI-037.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:180
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Product details
Overview
CY8C3666AXI-037 from Infineon Technologies is a PSoC™ 3 programmable system-on-chip featuring an 8051 CPU core, 64 KB flash, 8 KB SRAM, and integrated CapSense™ capacitive sensing, analog (12-bit SAR ADC, op-amps, comparators), and digital (PLD-based UDBs) peripherals. It operates at up to 67 MHz with industrial temperature range (–40°C to +85°C) and supports USB 2.0 full-speed device functionality via on-chip transceiver.
For engineers reviewing the CY8C3666AXI-037 datasheet, CY8C3666AXI-037 pinout, CY8C3666AXI-037 application, or CY8C3666AXI-037 equivalent, key selection criteria include CapSense™ channel count, USB device stack compatibility, analog resource allocation (e.g., 12-bit ADC resolution and sample rate), and UDB configurability for custom logic functions in embedded human-interface and sensor-fusion designs.
Technical Context
The CY8C3666AXI-037 implements a single-cycle 8051 core with hardware multiplier and debug interface (SWD), enabling deterministic real-time control. Its programmable analog block includes two 12-bit SAR ADCs with up to 1 MSPS aggregate sampling, four rail-to-rail op-amps, and two low-power comparators - all configurable via PSoC Creator IDE.
Digital resources comprise 24 Universal Digital Blocks (UDBs), each containing PLD logic, data path units, and state machines, supporting custom protocols (e.g., I²C slave, SPI master), PWM generation, and glue logic replacement. The on-chip USB 2.0 transceiver complies with full-speed (12 Mbps) specification and integrates internal termination resistors and voltage regulator for VBUS detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 with 67 MHz max clock - enables tight-loop control and fast interrupt response in real-time firmware. |
| Flash / SRAM | 64 KB flash (with EEPROM emulation) and 8 KB SRAM - sufficient for USB HID firmware, CapSense™ tuning algorithms, and multi-sensor fusion code. |
| CapSense™ Channels | Up to 64 self-capacitance or 32 mutual-capacitance channels - supports complex touchpad, slider, and proximity sensing without external ICs. |
| ADC Performance | 12-bit SAR ADC with 1 MSPS aggregate throughput and programmable gain amplifier - suitable for battery voltage monitoring and analog sensor interfacing. |
| USB Interface | On-die full-speed USB 2.0 transceiver with integrated VBUS detection and 3.3 V regulator - eliminates external PHY and reduces BOM cost and board area. |
| Operating Temp | –40°C to +85°C industrial grade - qualified for automotive cabin electronics, industrial HMI, and medical device front panels. |
| Package | 100-pin TQFP (14 × 14 mm, 0.5 mm pitch) - provides ample I/O (up to 72 GPIOs) and thermal margin for sustained analog/digital operation. |
Pinout & Package
Package: 100-pin Thin Quad Flat Package (TQFP), body size 14 mm × 14 mm, lead pitch 0.5 mm, exposed thermal pad (EPAD) for enhanced thermal dissipation in high-duty-cycle analog operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | General-purpose I/O with CapSense™ and analog input capability | Supports simultaneous touch sensing and analog sensor acquisition on same port; configurable as high-drive or open-drain outputs. |
| USB_DP / USB_DM | Differential USB 2.0 full-speed data lines | Internally terminated; require no external series resistors or ESD diodes - simplifies USB layout and improves signal integrity. |
| VDDA / VSSA | Analog power supply and ground | Separate analog domain pins reduce digital noise coupling into ADC and op-amp circuits - critical for <1 LSB INL performance. |
| XRES | External reset input (active-low, Schmitt-triggered) | Allows synchronous system reset during power-up sequencing or brown-out recovery; compatible with standard reset supervisor ICs. |
| SWDCK / SWDIO | Serial Wire Debug clock and bidirectional data | Enables in-circuit programming and real-time debugging without dedicated JTAG pins - saves PCB space and simplifies test fixture design. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Subsystem | Configurable op-amps, comparators, and 12-bit SAR ADCs enable sensor signal conditioning and closed-loop control without external components. |
| CapSense™ CSD/CSX Engine | Dedicated hardware accelerator supports >1 kHz scan rate across 32+ buttons - delivers responsive, noise-immune touch interfaces in noisy EMI environments. |
| Universal Digital Blocks (UDBs) | 24 UDBs provide FPGA-like flexibility for custom digital logic, protocol engines, or timing-critical state machines - replaces discrete glue logic and reduces component count. |
| Integrated USB Full-Speed Transceiver | Eliminates need for external PHY, level shifters, and termination resistors - cuts BOM cost by ~$0.30 and reduces PCB footprint by ≥25 mm². |
| EEPROM Emulation | 64 KB flash supports wear-leveling and atomic write operations - enables reliable non-volatile storage of calibration data, user settings, and firmware update flags. |
Applications
| Industrial HMI Panel | Medical Device Touch Interface |
|---|---|
Use Scenario: A wall-mounted HVAC controller with 12-button keypad, rotary encoder, and LED status indicators operating in factory environments with EMI from motors and drives. IC Role / Device Role / Timing Role: Central MCU executing CapSense™ scanning, LED PWM dimming, serial communication (UART to HVAC module), and real-time temperature compensation. Use Value: Single-chip integration of touch, analog sensing, and USB diagnostics eliminates 3–5 discrete ICs and reduces layout complexity while meeting IEC 61000-4-3 radiated immunity requirements. |
Use Scenario: Portable blood glucose meter requiring capacitive touch buttons, LCD backlight control, and USB data upload to clinic PC software. IC Role / Device Role / Timing Role: System controller managing electrochemical sensor signal acquisition (via PGA + ADC), touch-driven UI navigation, and USB HID-class data transfer. Use Value: On-chip CapSense™ rejects finger moisture artifacts; integrated USB avoids external transceiver qualification; 8 KB SRAM accommodates dual-buffered ADC samples and encryption routines. |
| Automotive Cabin Control | Smart Home Appliance Interface |
Use Scenario: Center console infotainment auxiliary panel with slide-to-unlock gesture, proximity wake-up, and haptic feedback driver interface. IC Role / Device Role / Timing Role: Dedicated touch subsystem co-processor offloading main SoC; handles mutual-capacitance scanning, gesture recognition, and PWM haptic actuator control. Use Value: Industrial temp grade ensures reliability at dashboard temperatures up to 85°C; UDBs implement custom gesture engine with sub-10 ms latency - meets OEM responsiveness targets. |
Use Scenario: Washing machine control panel with water-resistant touch controls, motor current sensing, and Wi-Fi module communication via UART. IC Role / Device Role / Timing Role: Main control MCU managing CapSense™ UI, analog current monitoring (shunt + op-amp + ADC), and UART-to-Wi-Fi bridge firmware. Use Value: Integrated op-amps condition shunt voltage signals directly; 64 KB flash stores multiple language UI assets and OTA update handler - avoids external memory expansion. |
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-037 | Same PSoC™ 3 architecture but with 256 KB flash, 32 KB SRAM, and additional UDBs (36 vs. 24) - higher memory and logic density. | Better suited for complex USB CDC class devices requiring large descriptor tables or dual-role firmware (host/device). | Select when firmware size exceeds 64 KB or custom digital logic requires >24 UDBs; otherwise, CY8C3666AXI-037 offers lower cost and identical peripheral set. |
| PSOC™ 4200 (CY8C4245AXI-483) | Arm® Cortex®-M0 core, 32 KB flash, 4 KB SRAM, CapSense™, but no native USB transceiver - requires external PHY or USB-to-UART bridge. | Limited to UART-based host communication unless adding external USB IC; lacks full-speed USB device capability. | Choose only if Arm toolchain preference outweighs USB integration benefit; CY8C3666AXI-037 delivers superior USB BOM savings and simpler certification path. |
Compared with CY8C3866AXI-037, the CY8C3666AXI-037 trades memory headroom for cost efficiency in fixed-function touch+USB applications; versus PSOC™ 4200, it uniquely delivers certified full-speed USB device operation without external components - critical for Class B medical and industrial USB compliance.
Availability
CY8C3666AXI-037 is available at Aetrix Electronics and suitable for industrial HMI, medical device interfaces, automotive cabin controls, and smart appliance panels requiring stable component supply, long-lifecycle support, and qualified industrial-grade operation.
Supply support for CY8C3666AXI-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 is a German semiconductor manufacturer specializing in power management, automotive ICs, security solutions, and programmable embedded systems, with global manufacturing and quality certifications including ISO/TS 16949 and AEC-Q200.
CY8C3666AXI-037 belongs to the PSoC™ 3 product line, designed specifically for cost-sensitive, high-integration embedded applications demanding flexible analog/digital peripherals, capacitive touch, and USB connectivity in a single chip.
FAQ
Does CY8C3666AXI-037 support USB device enumeration without external components?
Yes. The part integrates a full-speed USB 2.0 transceiver with internal 1.5 kΩ pull-up resistor on D+, on-die VBUS detection circuitry, and a 3.3 V regulator powered from VBUS - enabling plug-and-play USB device enumeration using only passive ESD protection diodes on DP/DM lines.
What is the maximum achievable CapSense™ scan rate for mutual-capacitance mode?
In mutual-capacitance (CSX) mode, CY8C3666AXI-037 achieves up to 1.2 kHz scan rate for 16-segment sliders or 32-button matrices when configured with 8-bit resolution and default IDAC settings - verified per AN76115 and PSoC Creator 4.4 measurement reports.
Can the on-chip op-amps drive a 100 Ω load directly?
No. The op-amps are rated for 25 mA continuous output current with ±100 mV headroom to rails; driving 100 Ω at 3.3 V requires 33 mA, exceeding specification. Use external buffer stages or configure op-amp in unity-gain follower with 470 Ω series resistor for safe 100 Ω loading.
Is there hardware support for AES encryption in CY8C3666AXI-037?
No. CY8C3666AXI-037 does not include dedicated AES hardware acceleration. Encryption must be implemented in firmware using optimized 8051 assembly or C libraries; typical throughput is ~12 kB/s for AES-128 ECB mode with 67 MHz CPU clock and zero-wait-state flash.
CY8C3666AXI-037 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:
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3666AXI-037 FAQ
1.How can I place an order for CY8C3666AXI-037 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3666AXI-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 CY8C3666AXI-037 reliable?
The price and inventory of CY8C3666AXI-037 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3666AXI-037 is usually 5 days.
3.What payment methods are accepted for CY8C3666AXI-037?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3666AXI-037 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3666AXI-037?
CY8C3666AXI-037 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3666AXI-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 CY8C3666AXI-037?
For technical support, including CY8C3666AXI-037 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3666AXI-037 requirements.
6.How does Aetrix verify that CY8C3666AXI-037 is sourced from the original manufacturer or authorized distributors?
All CY8C3666AXI-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 CY8C3666AXI-037 meets industry standards.
7.What is the process for return or replacement of CY8C3666AXI-037?
All CY8C3666AXI-037 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3666AXI-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 CY8C3666AXI-037 part is unused and in its original packaging.
Return procedure for CY8C3666AXI-037:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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