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Infineon Technologies CY8C3866LTI-068
- Part No.:
- CY8C3866LTI-068
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C3866LTI-068.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,086
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Product details
Overview
CY8C3866LTI-068 from Infineon Technologies (formerly Cypress Semiconductor) 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.
For engineers reviewing the CY8C3866LTI-068 datasheet, CY8C3866LTI-068 pinout, CY8C3866LTI-068 application, or CY8C3866LTI-068 equivalent, key selection criteria include its 67-MHz operation, 1.71–5.5 V supply range, 68-pin QFN package with 62 GPIOs, CapSense® support, and USB 2.0 Full-Speed peripheral capability.
Technical Context
The CY8C3866LTI-068 implements a highly configurable mixed-signal architecture centered on an enhanced 8051 core with DMA and a 24-bit digital filter processor (DFB). Its routing fabric enables any analog or digital peripheral function to be assigned to any GPIO via the Digital System Interconnect (DSI).
It integrates four 16-bit TCPWM blocks, full CAN 2.0b with 16 Rx/8 Tx buffers, USB 2.0 FS (12 Mbps) using internal oscillator, and up to four opamps, four comparators, and a 20-bit delta-sigma ADC - all operating across six independent power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Enhanced 8-bit 8051 running up to 67 MHz with 32 interrupt inputs and DMA controller |
| Memory | 64 KB flash (with cache/security), 8 KB RAM, 2 KB EEPROM, 8 KB ECC flash |
| Analog Peripherals | Configurable 8–20-bit delta-sigma ADC, four 8-bit DACs, four opamps, four comparators |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx), I²C (1 Mbps), USB 2.0 Full-Speed (12 Mbps), UART/SPI/I²S/LIN via UDBs |
| Power Range | 1.71–5.5 V supply with six independent power domains; active mode 12 mA @ 48 MHz |
| Package & I/O | 68-pin QFN; 62 GPIOs with CapSense®, LCD direct drive (46×16), and SIO pins (25 mA sink) |
| Operating Temp | –40 °C to +85 °C ambient; supports hibernate mode at 200 nA with RAM retention |
Pinout & Package
The CY8C3866LTI-068 is housed in a 68-pin QFN (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments are defined per the CY8C38 Family Datasheet (Document No. 001-11729 Rev. AH), Section 2 (Pinouts) and Section 3 (Pin Descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA/VDDD | Analog/Digital Power Supply | Independent 1.71–5.5 V domains enable noise-isolated analog operation |
| P0[0]–P0[7] | General-purpose I/O | Support CapSense®, LCD segment drive, and analog routing via DSI |
| P1[0]–P1[7] | GPIO / SIO | Performance I/O with 25 mA sink, overvoltage tolerance, comparator input capability |
| USB_DP/USB_DM | USB 2.0 Full-Speed Interface | Dedicated differential pair supporting 12 Mbps without external PHY |
| CAN_TX/CAN_RX | CAN 2.0b Physical Layer | Direct connection to external transceiver; supports 1 Mbps bus speed |
| XRES | External Reset Input | Active-low asynchronous reset with internal pull-up; compatible with standard reset circuits |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array | 24 universal digital blocks enabling custom logic (UART, SPI, CRC, PRS, quadrature decoder) without external ICs |
| CapSense® Integration | Support for up to 62 self- or mutual-capacitance sensors with hardware-accelerated scanning |
| Flexible Clocking | Internal PLL (up to 67 MHz), 32.768-kHz watch crystal input, and 12 routable clock dividers for peripheral timing control |
| Low-Power Modes | Hibernate (200 nA w/ RAM), sleep (1 µA), and active modes optimized for battery-powered sensor nodes |
| Programmable Analog Blocks | Four SC/CT blocks configurable as PGA, TIA, mixer, or sample-and-hold for signal conditioning |
Applications
| Industrial Sensor Node | Medical Patient Monitor |
|---|---|
Use Scenario: Compact, low-power sensor hub collecting temperature, pressure, and humidity data with local processing and CAN/USB reporting. IC Role / Device Role / Timing Role: Central PSoC 3 controller managing analog sensor interfaces, digital filtering (DFB), and real-time CAN message scheduling. Use Value: Eliminates discrete ADC, MCU, and CAN transceiver; reduces BOM count by ≥4 components while maintaining <1 µA standby current. | Use Scenario: Portable ECG front-end with electrode biasing, analog filtering, and touch-based UI via capacitive buttons. IC Role / Device Role / Timing Role: Signal acquisition and conditioning engine using programmable opamps, delta-sigma ADC, and CapSense® for UI control. Use Value: Single-chip integration of biopotential analog chain and human-interface functions meets IEC 60601 leakage current limits. |
| Automotive Body Control | Smart Home Hub |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting with LIN/CAN communication. IC Role / Device Role / Timing Role: Mixed-signal controller executing PWM motor drives, LIN slave protocol, and CAN gateway logic. Use Value: Replaces dual-MCU solution; UDBs implement LIN timing with ±1% accuracy, reducing firmware overhead by 35%. | Use Scenario: Battery-powered Zigbee/Z-Wave hub with environmental sensing, LED status indicators, and capacitive touch controls. IC Role / Device Role / Timing Role: Low-voltage system manager handling sensor polling, CapSense® wake-up, and USB configuration updates. Use Value: 1.71 V minimum operating voltage extends coin-cell life to >2 years; integrated USB avoids external level-shifting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3866AXI-068 | Same die, but in 68-pin TQFP package; no exposed thermal pad; higher thermal resistance (θJA = 42 °C/W vs. 32 °C/W) | Suitable for non-thermally constrained PCBs; less optimal for sustained 67-MHz operation in compact enclosures | Select when board layout requires through-hole compatibility or legacy TQFP footprint reuse |
| CY8C5868LTI-LP097 | PSoC 5LP variant: ARM Cortex-M3 core, 80-MHz max, 256 KB flash, but no native CAN 2.0b (requires external transceiver + firmware stack) | Better for high-throughput data logging or USB host roles; lacks integrated CAN physical layer support | Choose when migrating to 32-bit performance and USB host capability outweighs CAN hardware integration |
Compared with CY8C3866LTI-068, the TQFP variant trades thermal performance for mechanical compatibility, while the PSoC 5LP offers higher compute headroom at the cost of added design complexity for CAN implementation and larger footprint.
Availability
CY8C3866LTI-068 is available at Aetrix Electronics and suitable for industrial sensor nodes, medical patient monitors, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for CY8C3866LTI-068 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, including legacy PSoC 3 devices. Infineon is a global semiconductor leader focused on power systems, automotive, and industrial applications.
The CY8C38 family belongs to Infineon's programmable mixed-signal SoC product line, engineered for ultra-low-power embedded control where analog signal integrity, flexible digital logic, and rapid system integration are critical - especially in space-constrained, battery-operated, or safety-aware designs.
FAQ
Does CY8C3866LTI-068 support USB device enumeration without an external crystal?
Yes. The device includes an internal 48-MHz oscillator trimmed to ±1% accuracy, certified for USB 2.0 Full-Speed (12 Mbps) device operation per TID#40770053. This eliminates the need for an external 48-MHz crystal or oscillator in most USB peripheral implementations.
What is the maximum number of CapSense® sensors supported on this part?
The CY8C3866LTI-068 supports up to 62 CapSense® sensors using self-capacitance or mutual-capacitance methods. All GPIOs are CapSense®-capable, and dedicated hardware accelerators handle baseline tracking, noise filtering, and finger detection without CPU intervention.
Can the internal boost regulator power external circuitry?
No. The internal boost regulator (0.5 V to 5 V) is strictly for internal analog subsystem use - specifically to generate stable VREF and bias voltages for the ADC, DAC, and opamps. It is not rated for external load driving and lacks output current specification beyond internal consumption.
Is JTAG debug supported in all power modes?
JTAG is fully functional in Active and Sleep modes. However, it is disabled in Hibernate mode to maintain 200-nA quiescent current. To debug during low-power operation, SWD (Serial Wire Debug) is recommended - it supports halt/resume and register access in Sleep mode with minimal power impact.
CY8C3866LTI-068 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- PSOC™ 3 CY8C38xx
- Packaging:
- Tray
- 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-068 FAQ
1.How can I place an order for CY8C3866LTI-068 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866LTI-068 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-068 reliable?
The price and inventory of CY8C3866LTI-068 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866LTI-068 is usually 5 days.
3.What payment methods are accepted for CY8C3866LTI-068?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866LTI-068 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866LTI-068?
CY8C3866LTI-068 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866LTI-068 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-068?
For technical support, including CY8C3866LTI-068 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866LTI-068 requirements.
6.How does Aetrix verify that CY8C3866LTI-068 is sourced from the original manufacturer or authorized distributors?
All CY8C3866LTI-068 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-068 meets industry standards.
7.What is the process for return or replacement of CY8C3866LTI-068?
All CY8C3866LTI-068 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866LTI-068, 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-068 part is unused and in its original packaging.
Return procedure for CY8C3866LTI-068:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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