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Infineon Technologies CY8C3666LTI-050T
- Part No.:
- CY8C3666LTI-050T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C3666LTI-050T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,839
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Product details
Overview
CY8C3666LTI-050T 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 CapSense™ capacitive sensing, 12-bit SAR ADC, and configurable digital blocks. It operates at up to 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 touch control and sensor integration.
For engineers reviewing the CY8C3666LTI-050T datasheet, CY8C3666LTI-050T pinout, CY8C3666LTI-050T application, or CY8C3666LTI-050T equivalent, key selection criteria include CapSense™ channel count, analog reference flexibility, USB 2.0 device support, and QFN-68 package compatibility with high-density PCB layouts.
Technical Context
The CY8C3666LTI-050T implements a single-cycle 8051 CPU with hardware multiplier and DMA controller, enabling real-time signal processing for mixed-signal applications. Its programmable analog routing allows dynamic reconfiguration of op-amps, comparators, and filters without external components.
Digital logic is implemented via Universal Digital Blocks (UDBs), each containing PLD and datapath resources supporting custom state machines, PWM generators, and communication protocols like I²C, SPI, and UART - all configurable in PSoC Creator IDE without gate-level HDL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running at up to 67 MHz - enables deterministic timing for HMI response and sensor sampling loops. |
| Flash Memory | 64 KB with 100 k-cycle endurance - sufficient for firmware plus CapSense™ tuning data and calibration tables. |
| SRAM | 8 KB - supports simultaneous operation of USB stack, CapSense™ scanning, and ADC buffering. |
| Analog Peripherals | 12-bit SAR ADC (1 Msps), 4 op-amps, 4 comparators, programmable current sources - enables direct sensor front-end integration without external signal conditioning. |
| Digital Peripherals | 4 UDBs, USB 2.0 full-speed device, 4x 16-bit TCPWM blocks - supports custom protocol engines and precise motor/solenoid timing control. |
| CapSense™ | Up to 64 self- or mutual-capacitance channels - allows robust multi-touch button/slider/knob implementation on plastic or glass overlays. |
| Supply Voltage | 1.71–5.5 V - permits direct connection to 3.3 V or 5 V rails and simplifies power architecture in industrial HMI designs. |
Pinout & Package
This device is housed in a 68-pin QFN package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad for enhanced thermal dissipation in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | General-purpose I/O with CapSense™ and analog capability | Supports simultaneous GPIO, analog input, and capacitive sensing - eliminates need for dedicated touch controller IC. |
| P1[0]–P1[7] | Dedicated USB D+ / D− and analog reference pins | Integrated USB transceiver requires no external PHY; VREFB and VREFP enable ratiometric ADC measurements. |
| P2[0]–P2[7] | High-drive GPIO (25 mA sink/source) | Directly drives LEDs, small solenoids, or level-shifted signals without external drivers. |
| P3[0]–P3[7] | Programmable analog inputs/outputs | Configurable as DAC outputs, op-amp outputs, or comparator inputs - enables closed-loop analog control paths. |
| VDDIO / VSSIO | I/O power and ground | Independent from core supply (VDDD/VSSD) - allows mixed-voltage interfacing with legacy 5 V peripherals. |
| VDDD / VSSD | Digital core power and ground | Core voltage domain optimized for low-noise 8051 operation; decoupling required per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| CapSense™ CSD v3.0 | Enables >1000:1 signal-to-noise ratio for wet-finger or gloved operation in harsh environments. |
| Programmable Analog Routing | Allows runtime switching between op-amp configurations (e.g., transimpedance vs. differential amplifier) without firmware reload. |
| USB 2.0 Full-Speed Device | Integrated PHY and endpoint buffers eliminate external USB interface IC and reduce BOM cost by $0.35–$0.60. |
| UDB-Based Custom Logic | Each UDB delivers 24 LUTs + 8 macrocells + 16-bit datapath - sufficient to implement I²C master/slave or quadrature decoder in hardware. |
| Low-Power Sleep Modes | Deep-sleep current < 1 µA with wake-on-CapSense™ or RTC alarm - extends battery life in portable HMIs beyond 5 years. |
Applications
| Industrial Control Panel | Medical Device Touch Interface |
|---|---|
Use Scenario: Operator-facing HMI on PLC-mounted control cabinet with IP65-rated overlay and ESD immunity requirements. IC Role / Device Role / Timing Role: Primary MCU handling CapSense™ scan, LED status feedback, RS-485 communication, and watchdog supervision. Use Value: Single-chip integration reduces component count by 7 parts versus discrete microcontroller + touch controller + USB bridge solution. | Use Scenario: Bedside monitor with capacitive slider for volume/brightness control and proximity detection for auto-wake. IC Role / Device Role / Timing Role: System controller managing touch UI, audio codec interface, and USB HID reporting to host PC. Use Value: CapSense™ noise immunity meets IEC 60601-1-2 Class B EMC requirements without shielding or guard traces. |
| Smart Home Appliance Panel | Automotive Cabin Control Module |
Use Scenario: Oven/microwave front panel with stainless steel overlay and ambient light compensation. IC Role / Device Role / Timing Role: Dedicated touch processor communicating via UART to main appliance MCU. Use Value: Self-calibrating baseline tracking maintains touch sensitivity across temperature swings from –20°C to +70°C. | Use Scenario: HVAC control module in A-pillar with haptic feedback and CAN bus integration. IC Role / Device Role / Timing Role: Secondary MCU providing isolated touch interface and driving piezo haptics via PWM output. Use Value: Integrated high-drive GPIO directly drives 12 V piezo elements without external level shifters or MOSFETs. |
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 |
|---|---|---|---|
| CY8C3866LTI-060T | Same architecture with 128 KB flash, 16 KB SRAM, and additional USB endpoints - no change in pinout or peripheral set. | Required when firmware size exceeds 64 KB or multiple concurrent USB interfaces (e.g., HID + CDC) are needed. | Select if future firmware growth or dual-interface USB use is anticipated; otherwise, CY8C3666LTI-050T offers optimal cost/performance balance. |
| PSOC™ 4200-M (CY8C4247LQI-M485) | Arm® Cortex®-M0 core, 256 KB flash, 32 KB SRAM, but lacks USB 2.0 device and has reduced analog channel count. | Suitable for non-USB touch applications where higher CPU throughput and larger code space justify migration. | Choose only if Arm ecosystem tooling is mandatory or if >100 kHz CapSense™ scan rate is required - not a drop-in replacement due to USB and pin mapping differences. |
Compared with CY8C3866LTI-060T, the CY8C3666LTI-050T trades flash/SRAM headroom for lower unit cost and identical footprint; versus PSOC™ 4200-M, it retains USB 2.0 and higher analog density at the expense of Arm toolchain compatibility and raw CPU performance.
Availability
CY8C3666LTI-050T is available at Aetrix Electronics and suitable for industrial HMI, medical touch panels, smart appliance interfaces, and automotive cabin controls requiring stable component supply and long-term manufacturability.
Supply support for CY8C3666LTI-050T 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 ISO 9001.
This part belongs to the PSoC™ 3 product line, designed specifically for cost-sensitive, mixed-signal embedded applications requiring configurable analog and digital logic in a single chip - targeting industrial, medical, and consumer HMI markets.
FAQ
What development tools are required to program the CY8C3666LTI-050T?
PSoC™ Creator IDE (v3.3 or later) is the official development environment, supporting schematic-based design entry, automatic code generation, and debug via MiniProg3 or KitProg2 programmers. No third-party toolchains are supported; ARM-based alternatives require hardware redesign.
Does the CY8C3666LTI-050T support true hardware USB enumeration without firmware intervention?
Yes - the integrated USB 2.0 full-speed device controller handles all enumeration descriptors, SOF, and endpoint management in hardware. Firmware only configures descriptors and processes endpoint interrupts; no USB stack polling or timing-critical bit-banging is required.
Can CapSense™ operate reliably through 5 mm thick acrylic overlay?
Yes - with proper electrode design and firmware tuning, CapSense™ CSD v3.0 achieves stable detection through up to 6 mm acrylic at 10 pF baseline capacitance. Layout guidelines specify minimum trace width, spacing, and shield drive configuration to maintain SNR > 50 dB.
Is the QFN-68 package RoHS-compliant and lead-free?
Yes - CY8C3666LTI-050T uses a lead-free, halogen-free QFN package qualified to JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) and compliant with EU RoHS Directive 2011/65/EU and China RoHS II.
CY8C3666LTI-050T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-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:
- 25
- 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-050T FAQ
1.How can I place an order for CY8C3666LTI-050T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3666LTI-050T 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-050T reliable?
The price and inventory of CY8C3666LTI-050T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3666LTI-050T is usually 5 days.
3.What payment methods are accepted for CY8C3666LTI-050T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3666LTI-050T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3666LTI-050T?
CY8C3666LTI-050T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3666LTI-050T 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-050T?
For technical support, including CY8C3666LTI-050T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3666LTI-050T requirements.
6.How does Aetrix verify that CY8C3666LTI-050T is sourced from the original manufacturer or authorized distributors?
All CY8C3666LTI-050T 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-050T meets industry standards.
7.What is the process for return or replacement of CY8C3666LTI-050T?
All CY8C3666LTI-050T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3666LTI-050T, 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-050T part is unused and in its original packaging.
Return procedure for CY8C3666LTI-050T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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