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Infineon Technologies CY8C3866LTI-067T
- Part No.:
- CY8C3866LTI-067T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C3866LTI-067T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,750
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Product details
Overview
CY8C3866LTI-067T 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 sensing, medical instrumentation, and low-power human-interface systems.
For engineers reviewing the CY8C3866LTI-067T datasheet, CY8C3866LTI-067T pinout, CY8C3866LTI-067T application, or CY8C3866LTI-067T equivalent, key selection criteria include its 67-MHz operation, 1.71–5.5 V supply range, 24-channel DMA, CapSense® support for up to 62 sensors, and USB 2.0 Full-Speed peripheral capability with internal oscillator.
Technical Context
The CY8C3866LTI-067T implements a mixed-signal SoC architecture centered on an enhanced 8051 core with DMA and digital filter processor (DFB), enabling concurrent analog acquisition and digital signal processing. Its routing fabric allows any analog or digital peripheral function-including four TCPWM blocks, I²C, UART, SPI, and CAN-to be assigned to any GPIO.
It features a multi-domain power system supporting six independent voltage domains, ultra-low-power sleep (1 µA) and hibernate (200 nA with RAM retention) modes, and programmable clocking with internal PLL (up to 67 MHz), 32.768-kHz watch crystal support, and 12 routable clock dividers - all managed via PSoC Creator™ schematic-based design flow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051, up to 67 MHz - enables deterministic real-time control with legacy 8051 toolchain compatibility |
| Flash / RAM | 64 KB flash (with ECC support), 8 KB RAM - sufficient for complex firmware with secure boot and data logging |
| Analog Peripherals | Configurable delta-sigma ADC (8–20 bit), 4× opamps, 4× comparators, 4× DACs - supports precision sensor front-end and closed-loop analog control |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 FS (12 Mbps), I²C (1 Mbps), UART, SPI - enables robust industrial bus communication and PC connectivity |
| Power Range | 1.71–5.5 V across up to six domains - allows direct interfacing with diverse sensors, displays, and legacy logic without level-shifting |
| Low-Power Modes | 1 µA sleep, 200 nA hibernate with RAM retention - extends battery life in portable and energy-harvested systems |
| I/O Flexibility | Up to 72 pins, including 62 GPIOs, 8 SIOs (25 mA sink, overvoltage tolerant), USBIO - supports mixed-voltage board design and hot-swap interfaces |
Pinout & Package
This device is packaged in a 68-pin QFN (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are defined per the CY8C38 family's standardized pinout layout, supporting full peripheral routing flexibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA / VDDD | Analog/Digital Power Supply | Independent 1.71–5.5 V domains enable noise-isolated analog operation and flexible I/O voltage scaling |
| P0[0]–P0[7] | General-purpose I/O | Programmable as GPIO, analog input, CapSense electrode, or routed peripheral signal (e.g., PWM, UART TX) |
| P1[0]–P1[7] | Performance I/O (SIO) | Support 25 mA sink, overvoltage tolerance up to 5.5 V, comparator input, and hot-swap capability |
| USB_DP / USB_DM | USB 2.0 Full-Speed Interface | Differential pair for 12 Mbps USB communication using internal oscillator - no external crystal required |
| CAN_TX / CAN_RX | CAN 2.0b Physical Layer Interface | Dedicated pins for CAN transceiver connection; support 1 Mbps operation with integrated protocol engine |
| XRES | External Reset Input | Active-low asynchronous reset with internal pull-up; compatible with pushbutton or supervisor IC assertion |
| SWDCK / SWDIO | Serial Wire Debug Interface | 2-wire debug port for programming, real-time tracing, and breakpoints - replaces legacy JTAG footprint |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array | 24 universal digital blocks programmable as timers, counters, PWMs, CRC engines, PRS generators, or gate-level logic - eliminates need for external glue logic |
| CapSense® Engine | Hardware-accelerated capacitive touch sensing for up to 62 electrodes with noise immunity and automatic calibration - enables robust touch UI without host CPU overhead |
| Digital Filter Block (DFB) | 24-bit, 64-tap fixed-point FIR/IIR filter processor - offloads real-time sensor signal conditioning from CPU |
| Programmable Analog Blocks | Four SC/CT blocks configurable as PGA, TIA, mixer, or sample-and-hold - supports custom analog front-ends for current/voltage/impedance measurement |
| Flexible Clocking | Internal PLL (up to 67 MHz), 32.768-kHz RTC oscillator, and 12 programmable dividers - simplifies timing architecture across mixed-speed peripherals |
Applications
| Industrial Sensor Node | Medical Patient Monitor |
|---|---|
Use Scenario: Compact, battery-powered environmental sensor node measuring temperature, humidity, and gas concentration with wireless telemetry. IC Role / Device Role / Timing Role: Central controller managing analog sensor acquisition (via delta-sigma ADC and PGAs), CAN bus reporting, and ultra-low-power sleep scheduling. Use Value: Single-chip integration reduces BOM count and PCB area; 200 nA hibernate mode extends battery life to >5 years in intermittent-read applications. | Use Scenario: Portable ECG and SpO₂ monitor requiring clinical-grade analog signal fidelity and touch-based UI. IC Role / Device Role / Timing Role: Analog front-end controller with programmable gain amplifiers, 20-bit ADC oversampling, and CapSense® for buttonless interface. Use Value: On-chip analog configurability eliminates discrete opamp networks; CapSense® electrodes routed to any GPIO simplify mechanical design and improve ESD robustness. |
| Automotive Body Control Module | Smart Home Hub Controller |
Use Scenario: Low-voltage (12 V battery-derived) module controlling door locks, lighting, and window motors with LIN/CAN gateway functionality. IC Role / Device Role / Timing Role: CAN 2.0b endpoint with 16 Rx buffers for message filtering, LIN master via UART, and high-current SIO pins driving relays directly. Use Value: Integrated CAN protocol engine reduces software stack complexity; SIO pins tolerate load dump transients up to 5.5 V without external protection. | Use Scenario: Wi-Fi/BLE-connected home automation hub aggregating Zigbee/Z-Wave sensor data and driving local LED/LCD displays. IC Role / Device Role / Timing Role: USB host interface for firmware updates, LCD direct drive (46×16 segments), and I²C/SPI bridges to sub-GHz radios. Use Value: Native LCD driver eliminates display controller IC; USB FS peripheral enables field-upgradable firmware without external programmer. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3866AXI-067 | Same die, 100-pin TQFP package, higher pin count and thermal performance | Better suited for designs requiring >68 I/Os or enhanced thermal dissipation in continuous operation | Select when board layout accommodates larger footprint and additional GPIOs are needed for expansion |
| CY8C5868LTI-LP097 | PSoC 5LP variant: ARM Cortex-M3 core, 80 MHz, dual-core DFB, 256 KB flash, but no native CAN 2.0b | Higher compute throughput and advanced analog (dual 20-bit SAR ADC), but requires external CAN transceiver and controller | Select when migrating to ARM ecosystem and CAN is implemented via external IP or software stack |
Compared with CY8C3866LTI-067T, the CY8C3866AXI-067 offers more I/O and thermal headroom in TQFP, while the CY8C5868LTI-LP097 trades integrated CAN for ARM performance and larger memory - making the original optimal for cost-sensitive, CAN-centric 8-bit embedded control.
Availability
CY8C3866LTI-067T is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical devices, automotive body controllers, and smart home hubs requiring stable component supply and long-term lifecycle support.
Supply support for CY8C3866LTI-067T 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, industrial, and embedded solutions.
The CY8C38 family belongs to Infineon's PSoC® 3 programmable SoC product line, engineered for ultra-low-power, mixed-signal embedded control where analog configurability, CAN/USB connectivity, and rapid firmware iteration are critical.
FAQ
Does CY8C3866LTI-067T require an external crystal for USB operation?
No. The device integrates an internal oscillator qualified for USB 2.0 Full-Speed (12 Mbps) operation, eliminating the need for an external crystal. This is confirmed in the CY8C38 Family Datasheet (Rev. AH, page 1) under "USB 2.0 certified Full-Speed (FS) 12 Mbps peripheral interface using internal oscillator." External crystals remain optional for higher accuracy timing or RTC functions.
What is the maximum operating temperature for CY8C3866LTI-067T?
The ambient operating temperature range is –40 °C to +85 °C, as specified in the CY8C38 Family Datasheet (Rev. AH, page 1). This rating applies to the 68-pin QFN package (LTI suffix) and is validated per JEDEC standards. Storage temperature extends to 150 °C per JESD22-A103.
Can CapSense® be implemented on any GPIO of CY8C3866LTI-067T?
Yes. All general-purpose I/O pins (up to 62) support CapSense® electrode functionality, including dedicated routing to the on-die CapSense® hardware block. This is explicitly stated in the datasheet (page 1): "CapSense® support, up to 62 sensors" and "CapSense support from any GPIO." No external components are required for basic implementations.
Is the CY8C3866LTI-067T pin-compatible with other CY8C38 family members?
No - pin compatibility is package-dependent, not family-wide. The CY8C3866LTI-067T uses a 68-pin QFN footprint. Other variants like the CY8C3866AXI-067 (100-pin TQFP) or CY8C3866PVI-067 (48-pin SSOP) have different pin counts and layouts. Routing and peripheral assignment must be revalidated per package, though firmware and PSoC Creator projects are largely portable.
CY8C3866LTI-067T 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:
- 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 16x20b; D/A 4x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3866LTI-067T FAQ
1.How can I place an order for CY8C3866LTI-067T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866LTI-067T 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-067T reliable?
The price and inventory of CY8C3866LTI-067T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866LTI-067T is usually 5 days.
3.What payment methods are accepted for CY8C3866LTI-067T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866LTI-067T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866LTI-067T?
CY8C3866LTI-067T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866LTI-067T 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-067T?
For technical support, including CY8C3866LTI-067T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866LTI-067T requirements.
6.How does Aetrix verify that CY8C3866LTI-067T is sourced from the original manufacturer or authorized distributors?
All CY8C3866LTI-067T 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-067T meets industry standards.
7.What is the process for return or replacement of CY8C3866LTI-067T?
All CY8C3866LTI-067T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866LTI-067T, 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-067T part is unused and in its original packaging.
Return procedure for CY8C3866LTI-067T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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