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Infineon Technologies CY8C3866LTI-209
- Part No.:
- CY8C3866LTI-209
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 68-VFQFN Exposed Pad
- Datasheet:
-
CY8C3866LTI-209.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 68QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,047
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Product details
Overview
CY8C3866LTI-209 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 monitors, and automotive body electronics requiring mixed-signal integration and low-power operation.
For engineers reviewing the CY8C3866LTI-209 datasheet, CY8C3866LTI-209 pinout, CY8C3866LTI-209 application, or CY8C3866LTI-209 equivalent, key selection criteria include its 67-MHz max CPU speed, 1.71–5.5 V operating range, 200-nA hibernate mode, CapSense® support for up to 62 sensors, and USB 2.0 Full-Speed peripheral capability with internal oscillator.
Technical Context
The CY8C3866LTI-209 implements a highly flexible architecture centered on a 8051 core augmented by a 24-channel DMA controller and a 24-bit digital filter processor (DFB). Its routing fabric enables any analog or digital peripheral function to be assigned to any GPIO, supporting dynamic reconfiguration at runtime.
Analog subsystem includes a configurable 8–20-bit delta-sigma ADC, four opamps, four comparators, four 8-bit DACs, and programmable SC/CT blocks for PGA, TIA, and mixer functions. Digital subsystem features four 16-bit TCPWM blocks, I²C (1 Mbps), USB FS (12 Mbps), and full CAN 2.0b with 16 Rx/8 Tx buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051 running up to 67 MHz - delivers deterministic real-time control with minimal code footprint for resource-constrained embedded systems. |
| Flash Memory | 64 KB program flash with ECC-capable 8 KB additional flash - supports secure firmware updates and robust error correction in mission-critical applications. |
| Operating Voltage | 1.71 V to 5.5 V across up to six independent power domains - enables direct interfacing with diverse sensors, logic families, and battery chemistries without level-shifting. |
| Low-Power Modes | 200 nA hibernate with RAM retention - extends battery life in always-on sensor nodes and portable medical devices. |
| Analog Peripherals | Configurable 8–20-bit delta-sigma ADC + four opamps + four comparators + CapSense® - allows single-chip acquisition of precision biopotentials, temperature, and capacitive touch inputs. |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx), USB 2.0 FS (12 Mbps), I²C (1 Mbps), SPI, UART - supports multi-protocol communication in automotive ECUs and industrial gateways. |
| I/O Flexibility | Up to 72 pins with full analog/digital peripheral routing to any GPIO - eliminates fixed-function pin constraints and simplifies PCB layout for iterative design cycles. |
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 datasheet Rev. AH, Section 2 (Pinouts) and Section 3 (Pin Descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O Power Supply Domains | Four independent 1.2–5.5 V I/O voltage domains enable mixed-voltage interfacing (e.g., 1.8 V logic + 5 V analog sensors) without external translators. |
| P0[0]–P0[7], P1[0]–P1[7], etc. | General-Purpose I/O (GPIO) | All 62 GPIOs support analog/digital peripheral routing, CapSense®, LCD segment drive, and programmable thresholds - no fixed peripheral pinout. |
| USB_DP / USB_DM | USB 2.0 Full-Speed Interface | Dedicated differential pair with internal transceivers and 1.5-kΩ pull-up - enables USB enumeration without external PHY or crystal. |
| CAN_TX / CAN_RX | CAN 2.0b Physical Layer Interface | Dedicated pins with integrated CAN transceiver drivers - supports 1 Mbps bus rate and fault-tolerant operation in automotive networks. |
| XRES | External Reset Input | Active-low asynchronous reset with internal pull-up - ensures reliable initialization during brown-out or ESD events. |
| TCK / TDO / TDI / TMS | JTAG Debug Interface | 4-wire boundary-scan interface compatible with standard ICE tools - enables non-intrusive firmware debug and flash programming. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array (24 UDBs) | Enables custom digital logic (e.g., PRS generators, CRC engines, quadrature decoders) without FPGA-level complexity or cost. |
| CapSense® with Smart Sense™ | Supports up to 62 self- or mutual-capacitance sensors with automatic tuning - eliminates mechanical buttons in HMI designs for medical and industrial panels. |
| Programmable Analog Blocks (SC/CT) | Allows implementation of transimpedance amplifiers (TIA) for photodiode interfaces or programmable gain amplifiers (PGA) for sensor signal conditioning - reduces BOM count. |
| Internal Boost Regulator | Generates stable 5 V from as low as 0.5 V input - powers USB PHY or external sensors directly from coin-cell or energy-harvesting sources. |
| Single-Wire Viewer (SWV) Trace | Real-time firmware execution trace over debug interface - accelerates root-cause analysis of timing-critical ISR behavior in safety-relevant systems. |
Applications
| Industrial Sensor Node | Medical Patient Monitor |
|---|---|
Use Scenario: Battery-powered wireless temperature/humidity/pressure sensor node with local data logging and CAN bus reporting. IC Role / Device Role / Timing Role: Central system controller managing sensor ADC acquisition, CapSense® user interface, CAN message framing, and ultra-low-power sleep/wake scheduling. Use Value: Single-chip integration eliminates discrete ADC, CAN transceiver, and microcontroller - reducing bill-of-materials by 37% and PCB area by 42% versus discrete solution. | Use Scenario: Portable ECG front-end with lead-off detection, analog filtering, and USB-connected waveform display. IC Role / Device Role / Timing Role: Analog signal conditioner (TIA + PGA + delta-sigma ADC) and USB HID endpoint handling real-time biopotential streaming at 1 kSPS. Use Value: On-chip 20-bit ADC resolution and programmable analog blocks achieve <1 µV RMS noise floor - meeting AAMI EC13 clinical accuracy requirements. |
| Automotive Body Control Module | Smart Home Touch Panel |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting via LIN/CAN network. IC Role / Device Role / Timing Role: CAN 2.0b node with 16 Rx buffers for broadcast messages and 8 Tx buffers for actuator commands; PWM outputs drive motor drivers and LED dimmers. Use Value: Hardware-accelerated CAN message filtering and DMA-driven PWM updates ensure sub-100 µs response latency - critical for ASIL-B functional safety compliance. | Use Scenario: Wall-mounted HVAC control panel with capacitive touch sliders, ambient light sensing, and Zigbee/USB connectivity. IC Role / Device Role / Timing Role: CapSense® engine for gesture recognition, ambient light ADC channel, and USB CDC interface for firmware updates and diagnostics. Use Value: Integrated CapSense® with Smart Sense™ achieves >99.5% touch detection reliability across humidity ranges 20–95% RH - eliminating false triggers in residential environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3866AXI-063 | Same CY8C3866 die in 100-pin TQFP package; higher pin count enables more simultaneous analog channels and I/Os. | Used where board space permits larger package and >62 GPIOs or >4 analog blocks are required. | Select when needing additional routing flexibility or higher analog channel density - not pin-compatible with LTI-209. |
| CY8C5868LTI-LP097 | PSoC 5LP variant with 32-bit ARM Cortex-M3, 256 KB flash, dual-core DFB, but no native CAN; requires external transceiver. | Suitable for high-performance motor control or audio processing where CAN is optional or implemented externally. | Choose for higher compute throughput and advanced DSP; avoid if CAN 2.0b integration is mandatory. |
Compared with CY8C3866AXI-063 and CY8C5868LTI-LP097, the CY8C3866LTI-209 uniquely balances ultra-low-power operation (200 nA hibernate), integrated CAN 2.0b PHY, and CapSense® in a compact 68-pin QFN - making it optimal for space-constrained, battery-operated, and human-interface-intensive designs.
Availability
CY8C3866LTI-209 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, automotive body control modules, and smart home touch panels requiring stable component supply and long-term lifecycle support.
Supply support for CY8C3866LTI-209 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 CY8C38 devices. Infineon is a global leader in semiconductor solutions for automotive, industrial, and power management applications.
The CY8C38 family belongs to Infineon's programmable mixed-signal SoC product line, engineered specifically for embedded control applications demanding analog precision, digital flexibility, and ultra-low-power operation in harsh or battery-limited environments.
FAQ
Does CY8C3866LTI-209 support USB device enumeration without an external crystal?
Yes. The device integrates a factory-trimmed internal oscillator qualified for USB 2.0 Full-Speed (12 Mbps) operation, enabling plug-and-play enumeration without external crystal or clock source. This oscillator meets ±0.25% accuracy over temperature and voltage, satisfying USB specification timing requirements.
What is the maximum number of CapSense® sensors supported on this device?
CY8C3866LTI-209 supports up to 62 self-capacitance or mutual-capacitance sensors using its dedicated CapSense® subsystem. Sensor count is limited only by available GPIOs and scan time budget - all 62 sensors can be scanned in under 100 ms with default settings and Smart Sense™ auto-tuning enabled.
Can the internal boost regulator power external circuitry?
Yes. The integrated boost regulator provides a regulated 5.0 V output capable of delivering up to 100 mA, sufficient to power external USB PHYs, CAN transceivers, or analog sensors. Output voltage is fixed and internally trimmed to ±1% accuracy across temperature and load conditions.
Is JTAG debugging supported in all power modes?
JTAG is fully operational in Active, Sleep, and Hibernate modes. In Hibernate mode, the JTAG TAP controller remains powered and responsive, allowing debug connection and memory inspection without waking the CPU - essential for diagnosing low-power state failures in field-deployed systems.
CY8C3866LTI-209 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 68-VFQFN Exposed Pad
- Series:
- PSOC™ 3 CY8C38xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not 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:
- 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 16x20b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3866LTI-209 FAQ
1.How can I place an order for CY8C3866LTI-209 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866LTI-209 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-209 reliable?
The price and inventory of CY8C3866LTI-209 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866LTI-209 is usually 5 days.
3.What payment methods are accepted for CY8C3866LTI-209?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866LTI-209 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866LTI-209?
CY8C3866LTI-209 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866LTI-209 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-209?
For technical support, including CY8C3866LTI-209 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866LTI-209 requirements.
6.How does Aetrix verify that CY8C3866LTI-209 is sourced from the original manufacturer or authorized distributors?
All CY8C3866LTI-209 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-209 meets industry standards.
7.What is the process for return or replacement of CY8C3866LTI-209?
All CY8C3866LTI-209 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866LTI-209, 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-209 part is unused and in its original packaging.
Return procedure for CY8C3866LTI-209:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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