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Infineon Technologies CY8C3866LTI-068T
- Part No.:
- CY8C3866LTI-068T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C3866LTI-068T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,138
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Product details
Overview
CY8C3866LTI-068T from Infineon Technologies (formerly Cypress) is a programmable System-on-Chip (PSoC® 3) integrating an 8-bit 8051 CPU, configurable analog/digital peripherals, 64 KB flash, 8 KB RAM, and full CAN 2.0b interface - designed for embedded control in industrial sensors, medical devices, and automotive body electronics requiring mixed-signal integration and low-power operation.
For engineers reviewing the CY8C3866LTI-068T datasheet, CY8C3866LTI-068T pinout, CY8C3866LTI-068T application, or CY8C3866LTI-068T equivalent, key selection criteria include its 68-pin QFN package, 67 MHz max CPU speed, 1.71–5.5 V operating range, 200 nA hibernate mode, and support for CapSense®, USB FS, and programmable analog blocks.
Technical Context
The CY8C3866LTI-068T implements a highly configurable architecture centered on a 8051 core with DMA and a 24-bit digital filter processor (DFB), enabling real-time signal processing without host CPU intervention. Its routing fabric allows any analog or digital peripheral function to be assigned to any of its 62 GPIOs or eight SIO pins.
It integrates dual-domain power management supporting up to six independent voltage domains, programmable clocking with internal PLL (up to 67 MHz), and a flexible analog subsystem including delta-sigma ADC (8–20 bit), four opamps, four comparators, and four DACs - all configurable via PSoC Creator™ schematic entry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051 running up to 67 MHz; enables deterministic real-time control with 32 interrupt inputs and hardware DMA. |
| Memory | 64 KB flash (with ECC support), 8 KB SRAM, 2 KB EEPROM; sufficient for firmware + data logging in standalone edge nodes. |
| Operating Voltage | 1.71–5.5 V across up to six power domains; supports direct battery interfacing (e.g., 2×AA, Li-ion, or 5 V rail). |
| Low-Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep; enables multi-year operation in energy-harvested or coin-cell-powered systems. |
| Digital Peripherals | Full CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 Full-Speed (12 Mbps), I²C (1 Mbps), 4× TCPWM blocks; suitable for vehicle network gateways and USB-CDC sensor hubs. |
| Analog Subsystem | Configurable delta-sigma ADC (8–20 bit), 4× opamps, 4× comparators, 4× DACs, CapSense® up to 62 sensors; enables integrated front-end signal conditioning and touch UI. |
| Package & Pins | 68-pin QFN (10 mm × 10 mm, 0.5 mm pitch); provides 62 GPIOs + 8 SIO pins with 25 mA sink capability and overvoltage tolerance. |
Pinout & Package
Package: 68-pin QFN (10 mm × 10 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad (EPAD). Pinout validated per CY8C38 Family Datasheet Rev. AH, pages 6–11.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA/VDDD | Analog/Digital Power Supply | Independent 1.71–5.5 V supplies enable noise-isolated analog operation and flexible system partitioning. |
| P0[0]–P0[7] | General-purpose I/O (GPIO) | Configurable as digital/analog input/output; support CapSense®, LCD drive, and analog routing to internal peripherals. |
| SIO0–SIO7 | Performance I/O | 25 mA sink, programmable thresholds, comparator input, hot-swap tolerant - ideal for driving LEDs, relays, or noisy industrial signals. |
| USB_DP/USB_DM | USB 2.0 Full-Speed Interface | Differential pair supporting 12 Mbps communication; requires no external PHY - reduces BOM and layout complexity. |
| CAN_TX/CAN_RX | Controller Area Network Interface | Dedicated differential transceiver pins compliant with ISO 11898-2; supports 1 Mbps CAN bus without external transceiver. |
| XRES | External Reset Input | Active-low asynchronous reset with internal pull-up; enables reliable power-on and fault recovery sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Blocks (PAB) | Four SC/CT blocks configurable as PGA, TIA, mixer, or sample-and-hold - eliminates discrete opamp networks in sensor front-ends. |
| CapSense® Engine | Hardware-accelerated capacitive sensing supporting up to 62 self- or mutual-capacitance sensors with <1% noise immunity - enables robust touch interfaces without firmware overhead. |
| Digital Filter Block (DFB) | 24-bit, 64-tap fixed-point FIR/IIR engine with dedicated memory; performs real-time filtering (e.g., ECG denoising) independent of CPU. |
| Flexible Clocking | Internal PLL (up to 67 MHz), 32.768 kHz watch crystal input, 12 routable clock dividers - simplifies timing design across mixed-speed peripherals. |
| Bootloader Support | In-system programming via I²C, SPI, UART, or USB; enables field firmware updates without JTAG debugger or physical access. |
Applications
| Industrial Sensor Node | Medical Vital Sign Monitor |
|---|---|
Use Scenario: Standalone temperature/humidity/pressure node with wireless telemetry and local display. IC Role / Device Role / Timing Role: Central controller managing sensor acquisition (via ADC/DAC), CapSense® UI, LCD drive, and CAN/USB data upload. Use Value: Single-chip integration replaces MCU + analog front-end + touch controller, reducing PCB area by >40% and BOM count by 7+ components. |
Use Scenario: Portable pulse oximeter with analog photodiode front-end, LED drivers, and OLED display. IC Role / Device Role / Timing Role: Signal conditioner (TIA + PGA), ADC controller, LED PWM modulator, and display driver - all synchronized via internal clock tree. Use Value: 200 nA hibernate mode extends battery life to >12 months on CR2032; programmable gain eliminates manual calibration resistors. |
| Automotive Body Control Module | Smart Home Touch Panel |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting with LIN/CAN gateway. IC Role / Device Role / Timing Role: CAN/LIN protocol handler, motor PWM generator, and high-side switch controller using SIO pins. Use Value: 25 mA SIO sink capability drives LEDs and small solenoids directly; overvoltage tolerance withstands load-dump transients up to 28 V. |
Use Scenario: Wall-mounted HVAC control panel with proximity wake, slider UI, and Zigbee/Bluetooth coexistence. IC Role / Device Role / Timing Role: Capacitive touch processor (62-sensor CapSense®), ambient light ADC, and RGB LED PWM controller. Use Value: Hardware-accelerated proximity detection enables zero-power wake; programmable thresholds adapt to glass thickness and environmental humidity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4247LQI-BL483 | PSoC 4 (ARM Cortex-M0+), 48 MHz, 256 KB flash, no CAN, USB not supported; lower analog precision (12-bit SAR vs. 20-bit ΔΣ). | Better for cost-sensitive IoT endpoints where BLE connectivity and moderate analog performance suffice. | Select when Bluetooth LE stack integration and lower unit cost outweigh need for CAN or ultra-high-resolution ADC. |
| STM32F303VCT6 | ARM Cortex-M4F, 72 MHz, FPU, 256 KB flash, 48 KB RAM, 12-bit ADC (5 MSPS), no CapSense® or programmable analog blocks. | Preferred for math-intensive control (e.g., motor FOC) but requires external components for capacitive touch or precision analog front-end. | Choose when floating-point computation or high-speed ADC sampling dominates over mixed-signal configurability and low-power hibernate. |
Compared with CY8C3866LTI-068T, the PSoC 4 alternative trades CAN/USB and analog flexibility for BLE integration and lower price, while the STM32F303 offers higher compute throughput at the expense of integrated capacitive sensing and programmable analog functionality.
Availability
CY8C3866LTI-068T is available at Aetrix Electronics and suitable for industrial sensor nodes, medical vital sign monitors, and automotive body control modules requiring stable component supply, long-term lifecycle support, and qualified production-grade silicon.
Supply support for CY8C3866LTI-068T 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 and supports the full PSoC® portfolio, delivering high-reliability semiconductor solutions for automotive, industrial, and IoT markets.
The CY8C38 family belongs to Infineon's programmable mixed-signal SoC product line, engineered to replace discrete analog/digital components with a single configurable chip for embedded control in resource-constrained, low-power applications.
FAQ
Does CY8C3866LTI-068T support USB device enumeration without external crystal?
Yes. The device integrates an internal oscillator certified for USB 2.0 Full-Speed (12 Mbps) operation, eliminating the need for an external 48 MHz crystal. This is confirmed in the datasheet (Rev. AH, page 1) under "USB 2.0 certified Full-Speed (FS) 12 Mbps peripheral interface (TID#40770053) using internal oscillator."
What is the maximum resolution and sampling rate of the delta-sigma ADC?
The delta-sigma ADC supports configurable resolution from 8 to 20 bits. At 20-bit resolution, the typical sampling rate is 125 SPS; at 12-bit resolution, it reaches up to 125 kSPS. These values are specified in Section 11.5 (Analog Peripherals) of the datasheet (Rev. AH, pages 88–95).
Can the SIO pins drive a 12 V relay coil directly?
No. SIO pins operate within the device's VDDIO range (1.71–5.5 V) and are rated for 25 mA sink at ≤5.5 V. Driving a 12 V relay requires an external N-channel MOSFET or high-voltage driver IC - the SIO pin can serve as the logic-level gate control signal.
Is CapSense® functionality available on all GPIOs in this package?
Yes. All 62 GPIOs support CapSense® - either as self-capacitance (CSD) or mutual-capacitance (CSX) sensors - with hardware-accelerated scanning and baseline tracking. This is documented in Section 8.7 and Table 11-45 of the datasheet (Rev. AH, pages 63 and 115).
CY8C3866LTI-068T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- PSOC™ 3 CY8C38xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 67MHz
- Connectivity:
- CANbus, 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 16x20b; D/A 4x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3866LTI-068T FAQ
1.How can I place an order for CY8C3866LTI-068T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866LTI-068T 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 CY8C3866LTI-068T reliable?
The price and inventory of CY8C3866LTI-068T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866LTI-068T is usually 5 days.
3.What payment methods are accepted for CY8C3866LTI-068T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866LTI-068T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866LTI-068T?
CY8C3866LTI-068T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866LTI-068T 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 CY8C3866LTI-068T?
For technical support, including CY8C3866LTI-068T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866LTI-068T requirements.
6.How does Aetrix verify that CY8C3866LTI-068T is sourced from the original manufacturer or authorized distributors?
All CY8C3866LTI-068T 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 CY8C3866LTI-068T meets industry standards.
7.What is the process for return or replacement of CY8C3866LTI-068T?
All CY8C3866LTI-068T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866LTI-068T, 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 CY8C3866LTI-068T part is unused and in its original packaging.
Return procedure for CY8C3866LTI-068T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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