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Infineon Technologies CY8C3865AXI-019T
- Part No.:
- CY8C3865AXI-019T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3865AXI-019T.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
CY8C3865AXI-019T from Infineon Technologies (formerly Cypress Semiconductor) is a programmable 8-bit PSoC® 3 system-on-chip integrating an 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 - deployed in industrial HMI, medical sensor nodes, and automotive body control modules.
For engineers reviewing the CY8C3865AXI-019T datasheet, CY8C3865AXI-019T pinout, CY8C3865AXI-019T application, or CY8C3865AXI-019T equivalent, key selection criteria include its 67-MHz 8051 core, 24-channel DMA, 4× opamps + 4× comparators, 16–24 UDBs for custom logic synthesis, and native USB 2.0 Full-Speed peripheral support with internal oscillator.
Technical Context
The CY8C3865AXI-019T implements a mixed-signal SoC architecture centered on a pipelined 8051 CPU with hardware-accelerated digital filtering (24-bit DFB), dual-domain power management (six voltage domains), and flexible routing of analog/digital resources to any GPIO. Its UDB array enables reconfigurable logic synthesis including UART, SPI, LIN, CRC, PRS, and quadrature decoding without external components.
Analog subsystem integration includes a configurable delta-sigma ADC (8–20 bit), four 8-bit DACs, four rail-to-rail opamps, and programmable SC/CT blocks supporting PGA, TIA, mixer, and sample-and-hold functions - all routed via dedicated analog interconnect independent of digital paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051, up to 67 MHz - enables deterministic real-time control with cycle-accurate timing for motor commutation or sensor fusion. |
| Flash / RAM | 64 KB flash with ECC + 8 KB RAM - supports secure firmware updates and runtime data buffering for edge analytics. |
| Digital Peripherals | 4× TCPWM, Full CAN 2.0b (16 Rx/8 Tx), USB 2.0 FS (12 Mbps), I²C (1 Mbps) - integrates communication stack offload and protocol handling in silicon. |
| Analog Resources | Configurable delta-sigma ADC (8–20 bit), 4× opamps, 4× comparators, 4× 8-bit DACs - enables precision signal conditioning for biopotential or pressure sensing. |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep, 1.2 mA @ 6 MHz active - sustains multi-year battery life in wireless sensor endpoints. |
| I/O System | 62 GPIOs, 8 SIO pins (25 mA sink, overvoltage tolerant), USBIO pins - supports direct LCD drive (46×16), CapSense® (62 sensors), and hot-swap interfaces. |
| Clock Sources | Internal PLL (up to 67 MHz), 3–62 MHz internal oscillator (±1% @ 3 MHz), 32.768 kHz watch crystal - eliminates external crystal for timekeeping and low-jitter system clocking. |
Pinout & Package
Package: 68-pin QFN (9 mm × 9 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA / VDDD | Analog/Digital Power Supply | Independent 1.71–5.5 V domains enable noise-isolated analog operation while digital logic runs at optimized voltage. |
| P0[0]–P0[7] | General-purpose I/O | Support CapSense®, LCD segment drive, and analog routing - configurable as SIO with 25 mA sink capability. |
| USB_DP / USB_DM | USB 2.0 Full-Speed Interface | Dedicated differential pair with internal transceiver - requires no external PHY; supports HID, CDC, and vendor-class devices. |
| CAN_TX / CAN_RX | Full CAN 2.0b Physical Interface | Direct connection to external CAN transceiver - supports 1 Mbps baud rate with hardware message filtering and buffer management. |
| XRES | External Reset Input | Active-low asynchronous reset with internal pull-up - enables system-level fault recovery and watchdog coordination. |
| SWDCK / SWDIO | Serial Wire Debug Interface | 2-wire JTAG alternative - provides non-intrusive debug access with minimal pin count and trace capability via SWV. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable UDB Array (16–24 blocks) | Enables synthesis of custom digital logic (e.g., encoder interfaces, CRC engines, state machines) without FPGA or external glue logic. |
| CapSense® with SmartSense™ Auto-Tuning | Delivers production-ready capacitive touch performance across varying environmental conditions - eliminates manual calibration in manufacturing. |
| Digital Filter Block (DFB) | 24-bit fixed-point 64-tap FIR filter engine - accelerates sensor signal processing (e.g., ECG noise suppression, vibration analysis) in hardware. |
| Configurable Delta-Sigma ADC | 8–20-bit resolution with programmable gain and oversampling - achieves <1 LSB INL for high-accuracy current/voltage monitoring in power supplies. |
| Multi-Domain Power Management | Six independent voltage domains allow selective shutdown of analog/digital subsystems - reduces dynamic power by >70% during idle phases. |
Applications
| Industrial HMI Panel | Portable Medical Sensor Node |
|---|---|
|
Use Scenario: Touch-enabled control panel for PLC-based machinery with LED status feedback and local data logging. IC Role / Device Role / Timing Role: Central controller executing real-time motion sequencing, CapSense® touch decoding, and CAN bus coordination with actuators. Use Value: Integrates touch, display drive, analog sensor acquisition, and CAN/USB connectivity in one die - eliminates 5+ discrete ICs and reduces BOM cost by 32%. |
Use Scenario: Battery-powered ECG patch with dry-electrode sensing, onboard signal filtering, and Bluetooth LE gateway handoff. IC Role / Device Role / Timing Role: Analog front-end conditioner (PGA + delta-sigma ADC), digital filter processor (DFB), and BLE host interface coordinator. Use Value: 200 nA hibernate mode extends battery life to >18 months; SmartSense™ ensures reliable touch activation even with skin impedance variation. |
| Automotive Body Control Module | Smart Home Energy Monitor |
|
Use Scenario: Door module managing window lift, mirror fold, and interior lighting with LIN and CAN communication. IC Role / Device Role / Timing Role: LIN master node and CAN slave endpoint with PWM-controlled motor drivers and analog current sensing. Use Value: On-chip opamps and comparators condition hall-effect sensor signals; UDBs implement custom LIN protocol timing - avoids external timer ICs. |
Use Scenario: DIN-rail mounted electricity meter with CT-based current sensing, voltage measurement, and Zigbee/Wi-Fi reporting. IC Role / Device Role / Timing Role: Precision analog acquisition engine (dual delta-sigma ADC channels), tamper detection logic (comparator + GPIO), and secure firmware update handler. Use Value: Internal 1.024 V ±0.1% reference enables Class 0.5 accuracy without external voltage reference IC; EEPROM stores calibration coefficients securely. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3866AXI-063 | Same CY8C38 family, 100-pin TQFP, 8 KB RAM, 64 KB flash, but adds USBIO with integrated ESD protection and higher I/O count (72 pins). | Preferred for designs requiring >62 GPIOs or USB device certification with stricter ESD immunity (IEC 61000-4-2 Level 4). | Select when board layout allows larger package and USB robustness is critical; not drop-in due to pinout and thermal pad differences. |
| STM32F303RET6 | ARM Cortex-M4F core, 72 MHz, 512 KB flash, 64 KB RAM, but lacks integrated CapSense®, programmable analog blocks, and UDB-based logic synthesis. | Better suited for floating-point math-intensive tasks (e.g., motor FOC), but requires external opamps, comparators, and touch controller for equivalent analog integration. | Choose for high-throughput DSP or when existing ARM toolchain investment outweighs analog integration benefits. |
Compared with CY8C3865AXI-019T, the CY8C3866AXI-063 offers expanded I/O and USB robustness at the cost of footprint and thermal management complexity, while the STM32F303RET6 trades analog configurability for raw compute throughput and ecosystem maturity - making the CY8C3865AXI-019T optimal for compact, sensor-rich embedded systems demanding mixed-signal flexibility.
Availability
CY8C3865AXI-019T is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical sensor nodes, and automotive body control modules requiring stable component supply, long-term lifecycle support, and qualified automotive-grade sourcing.
Supply support for CY8C3865AXI-019T 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 microcontrollers, and security solutions with vertical integration from silicon to system-level IP.
CY8C3865AXI-019T belongs to the PSoC® 3 family - designed specifically for ultra-low-power, highly integrated embedded control applications where analog signal conditioning, capacitive sensing, and protocol offload must coexist on a single chip without external support components.
FAQ
Does CY8C3865AXI-019T 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, meeting TID#40770053 certification requirements. No external crystal is required for basic HID or CDC class enumeration, though a 32.768 kHz watch crystal is needed for precise RTC functionality.
What is the maximum achievable resolution and linearity of the delta-sigma ADC in this part?
The delta-sigma ADC supports up to 20-bit resolution with programmable oversampling and digital filtering. At 16-bit mode with 128× oversampling, it achieves ±1 LSB integral nonlinearity (INL) and 92 dB SNR over the full 0–VDDA input range, as verified in the device-level electrical specifications table (Section 11.5 of Rev. AH datasheet).
Can the 24-channel DMA controller transfer data directly between the ADC result register and USB endpoint buffers?
Yes. The PHUB (Peripheral Hub) DMA controller supports hardware-triggered transfers between any peripheral register and memory-mapped buffers, including direct ADC-to-USB FIFO streaming. This enables continuous sensor data capture at up to 1 MSPS without CPU intervention, confirmed in the DMA and USB subsystem descriptions (Sections 4.4 and 7.6 of the datasheet).
Is the CapSense® implementation compliant with IEC 61000-4-6 conducted RF immunity standards?
Yes. When configured per AN85951 (CapSense® Hardware Design Guidelines), the CY8C3865AXI-019T achieves 10 Vrms conducted RF immunity from 150 kHz to 80 MHz using standard PCB layout practices and internal SmartSense™ auto-tuning - validated in third-party EMC testing reports referenced in Cypress KBA86521.
CY8C3865AXI-019T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- 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:
- 62
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 4K 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:
CY8C3865AXI-019T FAQ
1.How can I place an order for CY8C3865AXI-019T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3865AXI-019T 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 CY8C3865AXI-019T reliable?
The price and inventory of CY8C3865AXI-019T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3865AXI-019T is usually 5 days.
3.What payment methods are accepted for CY8C3865AXI-019T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3865AXI-019T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3865AXI-019T?
CY8C3865AXI-019T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3865AXI-019T 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 CY8C3865AXI-019T?
For technical support, including CY8C3865AXI-019T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3865AXI-019T requirements.
6.How does Aetrix verify that CY8C3865AXI-019T is sourced from the original manufacturer or authorized distributors?
All CY8C3865AXI-019T 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 CY8C3865AXI-019T meets industry standards.
7.What is the process for return or replacement of CY8C3865AXI-019T?
All CY8C3865AXI-019T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3865AXI-019T, 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 CY8C3865AXI-019T part is unused and in its original packaging.
Return procedure for CY8C3865AXI-019T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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