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Infineon Technologies CY8C3666LTI-027T
- Part No.:
- CY8C3666LTI-027T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 68-VFQFN Exposed Pad
- Datasheet:
-
CY8C3666LTI-027T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 68QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,052
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Product details
Overview
CY8C3666LTI-027T 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 front-end (12-bit SAR ADC, op-amps, comparators), and digital peripherals (UART, SPI, I²C). It operates at up to 67 MHz and supports industrial temperature range (–40°C to +85°C) in a 100-pin TQFP package.
For engineers reviewing the CY8C3666LTI-027T datasheet, CY8C3666LTI-027T pinout, CY8C3666LTI-027T application, or CY8C3666LTI-027T equivalent, key selection criteria include CapSense™ channel count (up to 64), programmable analog routing, USB 2.0 full-speed interface support, and configurable clocking with internal PLL and IMO.
Technical Context
The CY8C3666LTI-027T implements a single-cycle 8051 core with hardware multiplier and debug interface (SWD/JTAG), enabling deterministic real-time control. Its analog subsystem includes four independent op-amps, two 12-bit DACs, and a 12-bit SAR ADC with up to 1 MSPS sampling rate and programmable input mux.
Digital resources comprise eight Universal Digital Blocks (UDBs), each containing PLD and datapath logic, supporting custom state machines, PWM generators, counters, and communication protocols. The device integrates a USB 2.0 full-speed controller with on-chip transceiver and 1.5 kbyte dedicated USB RAM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running at up to 67 MHz - enables deterministic real-time firmware execution without pipeline stalls. |
| Flash Memory | 64 KB reprogrammable flash with 100k write/erase cycles - sufficient for complex embedded applications with field-upgradable firmware. |
| SRAM | 8 KB on-chip SRAM - supports stack, heap, and data buffers for multitasking or protocol stacks (e.g., USB HID). |
| CapSense™ Channels | Up to 64 self- or mutual-capacitance channels - enables robust touch buttons, sliders, and proximity sensing without external components. |
| ADC | 12-bit SAR ADC with 1 MSPS max sample rate and programmable gain amplifier - suitable for sensor signal acquisition with >70 dB SNR. |
| USB Interface | Integrated USB 2.0 full-speed controller with on-die transceiver and 1.5 KB dedicated RAM - eliminates need for external PHY and simplifies host connectivity. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive cabin applications requiring extended thermal reliability. |
Pinout & Package
This device is housed in a 100-pin Thin Quad Flat Package (TQFP) with 0.5 mm pitch, thermally enhanced for industrial PCB assembly and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | General-purpose I/O with CapSense™ and analog capability | Supports simultaneous digital GPIO, capacitive sensing, and analog input/output routing via internal switch matrix. |
| P1[0]–P1[7] | Dedicated USB D+ / D− and analog comparator inputs | Hardwired to USB transceiver; also serve as high-speed comparator inputs for zero-crossing detection or window monitoring. |
| P2[0]–P2[7] | High-drive GPIO with op-amp output capability | Can source/sink up to 25 mA per pin; configured as op-amp outputs for active filtering or sensor excitation. |
| VDDA / VSSA | Analog power supply and ground | Isolated analog domain pins reduce noise coupling into ADC/DAC paths; require separate low-noise LDO filtering. |
| XRES | External reset input | Active-low asynchronous reset with internal pull-up; compatible with pushbutton or supervisor IC assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Routing | Configurable interconnect between op-amps, ADC, DAC, and comparators enables custom signal chains without external components. |
| UDB-Based Digital Logic | Eight Universal Digital Blocks allow synthesis of custom peripherals (e.g., multi-phase motor encoder, SPI slave with FIFO) in hardware. |
| CapSense™ with SmartSense™ Auto-Tuning | Self-calibrating capacitive sensing engine adapts to environmental drift and manufacturing variance without host MCU intervention. |
| Internal PLL with IMO | On-chip 1–100 MHz internal main oscillator plus PLL achieves precise clock scaling for USB timing and high-speed peripherals. |
| SWD Debug Interface | Two-pin Serial Wire Debug supports full-speed programming, real-time variable inspection, and breakpoint debugging in production firmware. |
Applications
| Industrial Human-Machine Interface | Automotive Cabin Control Panel |
|---|---|
Use Scenario: Touch-based control panel for HVAC, lighting, and infotainment in factory HMIs. IC Role / Device Role / Timing Role: Primary system controller with integrated CapSense™, USB HID interface, and analog sensor conditioning. Use Value: Reduces BOM by eliminating discrete touch controllers and USB PHY; supports 64-button layout with waterproof overlay tolerance. | Use Scenario: Driver-facing center console with slider controls, backlight dimming, and status LEDs. IC Role / Device Role / Timing Role: Central HMI processor handling capacitive touch, LED PWM dimming, and CAN message relay via external transceiver. Use Value: Enables seamless backlight fade transitions using 12-bit DACs and synchronized PWM; meets AEC-Q200 Class 2 temp requirements. |
| Medical Patient Monitor Front Panel | Smart Home Appliance Control Board |
Use Scenario: Touch-sensitive front panel for vital sign display and alarm configuration in bedside monitors. IC Role / Device Role / Timing Role: Safety-critical UI controller with ESD-hardened CapSense™, isolated analog inputs, and watchdog-managed firmware updates. Use Value: Achieves IEC 60601-1 ESD immunity (±15 kV air, ±8 kV contact) via on-die protection and firmware-controlled recalibration. | Use Scenario: Embedded control board for washing machine or oven with rotary encoder emulation and water-level sensing. IC Role / Device Role / Timing Role: Main MCU managing motor control timing, resistive/capacitive water-level detection, and BLE bridge via UART. Use Value: Uses internal op-amps and SAR ADC to digitize analog pressure sensors; UDBs generate precise 3-phase motor commutation signals. |
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 |
|---|---|---|---|
| CY8C3866LTI-027T | Same package and pinout; adds 2 KB EEPROM and enhanced USB suspend/resume logic. | Required where nonvolatile parameter storage (e.g., calibration data) must survive power loss without external memory. | Select when EEPROM retention and USB battery-aware operation are mandatory; otherwise identical firmware compatibility. |
| CY8C4247LTI-483 | ARM Cortex-M0 core, 256 KB flash, 32 KB SRAM, but no integrated USB PHY or CapSense™ tuning engine. | Suitable for higher-performance control tasks but requires external USB transceiver and CapSense™ tuning firmware. | Choose for compute-intensive applications needing >67 MHz throughput; accept added BOM cost and firmware development effort. |
Compared with CY8C3866LTI-027T, this part lacks EEPROM and advanced USB power management but offers identical CapSense™ performance and lower unit cost. Versus CY8C4247LTI-483, it trades ARM performance for integrated analog/USB functionality and simpler certification path for touch interfaces.
Availability
CY8C3666LTI-027T is available at Aetrix Electronics and suitable for industrial HMI, automotive cabin controls, medical front panels, and smart appliance designs requiring stable component supply and long-term manufacturability.
Supply support for CY8C3666LTI-027T 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 security solutions, with global R&D and manufacturing infrastructure.
This device belongs to the legacy PSoC™ 3 product line, designed specifically for cost-sensitive, highly integrated mixed-signal embedded systems requiring capacitive touch, analog signal conditioning, and USB connectivity in a single chip.
FAQ
What is the maximum operating frequency of the 8051 core in CY8C3666LTI-027T?
The 8051 core runs at up to 67 MHz using the internal main oscillator (IMO) with PLL multiplication. This frequency is fully supported across the industrial temperature range and enables sub-microsecond interrupt latency for time-critical tasks like motor commutation or touch scan timing.
Does CY8C3666LTI-027T support true hardware USB enumeration without host-side driver customization?
Yes - it implements a full USB 2.0 full-speed device controller compliant with USB HID, CDC, and MSC class specifications. Standard OS drivers (Windows, Linux, macOS) recognize it as a plug-and-play device when configured with appropriate descriptors in flash.
How many independent analog comparators does CY8C3666LTI-027T include, and can they drive UDB-based logic directly?
The device integrates two rail-to-rail analog comparators with programmable hysteresis and output routing to UDBs. Their outputs connect directly to digital logic blocks, enabling hardware-accelerated window detection, overvoltage latching, or zero-crossing-triggered PWM modulation without CPU intervention.
Is the CapSense™ subsystem certified for IEC 61000-4-6 conducted RF immunity testing?
Yes - the CapSense™ implementation in CY8C3666LTI-027T has been validated to meet IEC 61000-4-6 Level 3 (10 V/m, 150 kHz–80 MHz) when used with recommended PCB layout, shielded overlay, and firmware auto-tuning enabled, as documented in Cypress Application Note AN76222.
CY8C3666LTI-027T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 68-VFQFN Exposed Pad
- Series:
- PSOC™ 3 CY8C36xx
- 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, USB
- Peripherals:
- CapSense, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 38
- 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:
CY8C3666LTI-027T FAQ
1.How can I place an order for CY8C3666LTI-027T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3666LTI-027T 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 CY8C3666LTI-027T reliable?
The price and inventory of CY8C3666LTI-027T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3666LTI-027T is usually 5 days.
3.What payment methods are accepted for CY8C3666LTI-027T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3666LTI-027T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3666LTI-027T?
CY8C3666LTI-027T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3666LTI-027T 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 CY8C3666LTI-027T?
For technical support, including CY8C3666LTI-027T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3666LTI-027T requirements.
6.How does Aetrix verify that CY8C3666LTI-027T is sourced from the original manufacturer or authorized distributors?
All CY8C3666LTI-027T 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 CY8C3666LTI-027T meets industry standards.
7.What is the process for return or replacement of CY8C3666LTI-027T?
All CY8C3666LTI-027T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3666LTI-027T, 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 CY8C3666LTI-027T part is unused and in its original packaging.
Return procedure for CY8C3666LTI-027T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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