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Infineon Technologies CY8C3866PVI-021T
- Part No.:
- CY8C3866PVI-021T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
CY8C3866PVI-021T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,612
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Product details
Overview
CY8C3866PVI-021T 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. It operates from 1.71–5.5 V at up to 67 MHz, supports CapSense® for touch sensing, and delivers ultra-low-power operation down to 200 nA in hibernate mode with RAM retention - ideal for battery-powered industrial HMI and sensor node applications.
For engineers reviewing the CY8C3866PVI-021T datasheet, CY8C3866PVI-021T pinout, CY8C3866PVI-021T application, or CY8C3866PVI-021T equivalent, key selection criteria include its 72-pin TQFP package, integrated DFB digital filter processor, USB 2.0 Full-Speed peripheral, 4-channel delta-sigma ADC, and flexible UDB-based peripheral synthesis capability.
Technical Context
The CY8C3866PVI-021T implements a tightly coupled mixed-signal architecture where the 8051 CPU core coordinates programmable analog blocks (PGA, TIA, DAC, comparator), digital UDBs, and fixed-function peripherals (CAN, USB, TCPWM). Its routing fabric enables any analog or digital signal path to be assigned to any GPIO, decoupling hardware design from pin constraints.
It features three independent clock domains: high-accuracy internal oscillator (1% at 3 MHz), PLL-synthesized up to 67 MHz, and low-power 33 kHz/100 kHz oscillators. Power management includes six configurable voltage domains, boost regulator (0.5 V → 5 V), and four power modes - active, sleep, hibernate, and deep hibernate - each with defined current draw and wake-up latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051 running up to 67 MHz; supports DMA and interrupt-driven real-time control |
| Flash Memory | 64 KB program flash with ECC support and security lock bits for firmware protection |
| RAM | 8 KB SRAM with hibernate-mode retention at 200 nA, enabling fast wake-up without reinitialization |
| Analog ADC | Configurable 8–20-bit delta-sigma ADC with programmable gain and reference (1.024 V ±0.1%) |
| Digital Peripherals | Full CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 FS (12 Mbps), I²C (1 Mbps), and 24 UDBs for custom logic synthesis |
| Power Range | 1.71–5.5 V supply; six independent power domains enable selective peripheral shutdown |
| Operating Temp | –40 °C to +85 °C ambient; qualified per JEDEC JESD22-A103 for 150 °C storage |
Pinout & Package
This device is housed in a 72-pin TQFP (Thin Quad Flat Package) with 0.5 mm pitch, thermally enhanced for industrial temperature operation and compatible with standard PCB reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O Power Domains | Four independent 1.2–5.5 V I/O supply rails supporting mixed-voltage interfacing |
| P0[0]–P0[7] | General-Purpose I/O | GPIOs with CapSense®, analog routing, and programmable drive strength (25 mA sink) |
| P1[0]–P1[7] | Performance I/O (SIO) | Hot-swap tolerant pins with overvoltage protection and comparator input capability |
| USB_DP / USB_DM | USB 2.0 Full-Speed Interface | Differential pair routed internally to USB PHY; requires no external transceiver |
| CAN_TX / CAN_RX | CAN 2.0b Physical Layer | Dedicated differential signaling pins supporting 1 Mbps bus speed with built-in termination control |
| XRES | External Reset Input | Active-low asynchronous reset with Schmitt-trigger input and internal pull-up |
| XTAL_IN / XTAL_OUT | Crystal Oscillator Interface | Supports 4–25 MHz external crystal for precise timing or clock source redundancy |
Key Features
| Feature | Design Value |
|---|---|
| CapSense® Support | Enables up to 62 self- or mutual-capacitance touch sensors directly on GPIOs without external components |
| Digital Filter Block (DFB) | 24-bit, 64-tap fixed-point FIR/IIR filtering engine offloads CPU for real-time sensor signal conditioning |
| Programmable Analog Blocks | Four SC/CT blocks configurable as PGA, TIA, mixer, or sample-and-hold - enabling precision front-end design |
| Flexible Clocking | 12 routable clock dividers and multiple oscillator sources allow independent timing domains per peripheral |
| Bootloader Programmability | Field-upgradable firmware via I²C, SPI, UART, or USB - no external programmer required |
Applications
| Industrial HMI Panel | Medical Sensor Node |
|---|---|
Use Scenario: Touch-enabled control panel in factory automation with LED indicators, relay drivers, and serial diagnostics. IC Role / Device Role / Timing Role: Central controller managing CapSense® buttons, driving 46×16 LCD segments, and communicating via CAN bus to PLCs. Use Value: Single-chip integration eliminates discrete touch controller, LCD driver, and CAN transceiver - reducing BOM count by ≥7 components. | Use Scenario: Portable ECG monitor with analog front-end, battery telemetry, and wireless data upload via USB. IC Role / Device Role / Timing Role: Signal acquisition hub performing delta-sigma ADC sampling, digital filtering (DFB), and USB mass-storage-class data export. Use Value: On-chip 20-bit ADC resolution and programmable PGA eliminate external instrumentation amplifier, improving SNR and layout compactness. |
| Automotive Body Control Module | Smart Energy Meter Interface |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting with LIN/CAN gateway functions. IC Role / Device Role / Timing Role: Mixed-signal MCU executing LIN 2.0 slave protocol, PWM motor control, and CAN 2.0b message bridging. Use Value: UDB-based LIN implementation avoids dedicated transceiver IC; dual-clock domain isolation prevents CAN/LIN timing interference. | Use Scenario: DIN-rail mounted meter with tamper detection, pulse counting, and RS-485 communication to utility backend. IC Role / Device Role / Timing Role: Low-power system manager handling EEPROM logging, comparator-based intrusion sensing, and isolated RS-485 via GPIO bit-banging. Use Value: Hibernate mode at 200 nA extends backup battery life to >10 years; internal voltage reference ensures ±0.1% ADC accuracy over temperature. |
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 |
|---|---|---|---|
| CY8C3866AXI-021 | Same die, 100-pin TQFP package; adds 28 extra GPIOs and two additional opamps | Suitable for designs requiring >72 I/Os or higher analog channel count | Select when board layout allows larger footprint and additional analog resources are needed |
| STM32F303VCT6 | ARM Cortex-M4F core, 256 KB flash, 48 KB RAM; no integrated CapSense® or DFB | Better suited for floating-point math or USB host; lacks PSoC's analog configurability | Choose for DSP-intensive tasks or when ecosystem tooling (STM32Cube) is preferred over PSoC Creator |
Compared with CY8C3866AXI-021, this 72-pin variant saves PCB area and cost where I/O count is constrained; versus STM32F303VCT6, it provides superior analog integration and lower standby current but lacks ARM ecosystem maturity.
Availability
CY8C3866PVI-021T is available at Aetrix Electronics and suitable for industrial HMI panels, medical sensor nodes, automotive body control modules, and smart energy meter interfaces requiring stable component supply across extended product lifecycles.
Supply support for CY8C3866PVI-021T 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 systems, automotive MCUs, and secure connectivity solutions.
The CY8C38 family belongs to Infineon's PSoC® 3 programmable SoC product line, designed specifically for embedded applications demanding high analog integration, ultra-low-power operation, and rapid hardware-software co-design using graphical tools.
FAQ
Is CY8C3866PVI-021T pin-compatible with other CY8C38 devices?
Yes - all CY8C3866 variants share identical 72-pin TQFP pinouts regardless of suffix (e.g., -021T vs. -021). Differences are limited to factory-programmed configuration bits, flash content, and minor electrical specs like VDDIO tolerance. No PCB redesign is needed when migrating between same-package CY8C3866 versions.
Does CY8C3866PVI-021T support USB device enumeration without external crystal?
Yes - it integrates a factory-trimmed internal oscillator qualified for USB 2.0 Full-Speed (12 Mbps) operation, eliminating the need for an external 12 MHz crystal. The internal oscillator meets TID#40770053 certification requirements when used with the on-chip USB PHY and proper PCB layout per AN61290.
What debug interfaces does CY8C3866PVI-021T support?
It supports JTAG (4-wire), Serial Wire Debug (SWD, 2-wire), and Single Wire Viewer (SWV) for real-time trace. Debug access is enabled via dedicated pins (TCK/TMS/TDO/TDI or SWDIO/SWCLK) and requires MiniProg3 or KitProg debugger. All interfaces support full breakpoint, memory inspection, and register-level control without halting peripheral operation.
Can CapSense® operate while the device is in sleep mode?
Yes - CapSense® can run autonomously in sleep mode using the low-power 33 kHz internal oscillator. Up to 16 sensors can be scanned with <5 µA average current draw, and the device wakes only upon threshold crossing or timer expiration. This enables always-on touch interfaces with multi-year battery life in portable applications.
CY8C3866PVI-021T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- 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:
CY8C3866PVI-021T FAQ
1.How can I place an order for CY8C3866PVI-021T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866PVI-021T 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 CY8C3866PVI-021T reliable?
The price and inventory of CY8C3866PVI-021T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866PVI-021T is usually 5 days.
3.What payment methods are accepted for CY8C3866PVI-021T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866PVI-021T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866PVI-021T?
CY8C3866PVI-021T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866PVI-021T 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 CY8C3866PVI-021T?
For technical support, including CY8C3866PVI-021T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866PVI-021T requirements.
6.How does Aetrix verify that CY8C3866PVI-021T is sourced from the original manufacturer or authorized distributors?
All CY8C3866PVI-021T 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 CY8C3866PVI-021T meets industry standards.
7.What is the process for return or replacement of CY8C3866PVI-021T?
All CY8C3866PVI-021T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866PVI-021T, 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 CY8C3866PVI-021T part is unused and in its original packaging.
Return procedure for CY8C3866PVI-021T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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