My Inquiry
My Account
Infineon Technologies CY8C3866AXI-038
- Part No.:
- CY8C3866AXI-038
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3866AXI-038.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,336
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY8C3866AXI-038 from Cypress Semiconductor is a programmable system-on-chip (PSoC® 3) integrating an 8051 CPU core, up to 64 KB flash, 8 KB SRAM, 2 KB EEPROM, 24-channel DMA, full-speed USB 2.0, CAN 2.0b, and a configurable analog subsystem with 20-bit delta-sigma ADC (192 ksps, 84 dB SINAD), all in a 48-pin SSOP package rated for –40°C to +85°C industrial operation.
For engineers reviewing the CY8C3866AXI-038 datasheet, CY8C3866AXI-038 pinout, CY8C3866AXI-038 application, or CY8C3866AXI-038 equivalent, this device supports rapid mixed-signal system integration with firmware-reconfigurable peripherals, CapSense® touch sensing, LCD direct drive, and real-time analog signal acquisition across thermocouple to ultrasonic bands - critical for embedded control, sensor fusion, and human interface design.
Technical Context
The CY8C3866AXI-038 implements a single-cycle 8051 microcontroller core operating up to 67 MHz with multiply/divide instructions, supported by a 24-channel PHUB-based DMA controller enabling zero-CPU-overhead data transfers between peripherals and memory. Its clocking system includes a 3–62 MHz internal main oscillator, 4–33 MHz crystal oscillator, PLL for 67 MHz generation, and low-power 32.768 kHz RTC oscillator.
Analog signal processing is anchored by a 1.024 V ±0.1% internal voltage reference and a configurable delta-sigma ADC offering 8–20-bit resolution, programmable gain (×0.25 to ×16), and 192 ksps sampling at 12-bit mode (66 dB SINAD) or 48 ksps at 16-bit mode (84 dB SINAD). The 67 MHz 24-bit DFB performs FIR/IIR filtering directly on ADC output via DMA routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running up to 67 MHz; enables deterministic real-time control with hardware multiply/divide. |
| Memory | 64 KB flash (100K write cycles, 20-yr retention), 8 KB SRAM, 2 KB EEPROM (1M cycles); supports secure firmware updates and parameter storage. |
| ADC | Configurable delta-sigma ADC: 16-bit @ 48 ksps, 84 dB SINAD, ±2 LSB INL; suitable for precision sensor interfaces like RTD or strain gauges. |
| Digital Peripherals | Full CAN 2.0b (16 Rx/8 Tx buffers), FS USB 2.0 (12 Mbps, internal oscillator), 4×16-bit TCPWM blocks; enables automotive diagnostics and host-connected edge devices. |
| I/O System | 62 GPIOs + 8 SIOs + 2 USBIOs; any GPIO routable to any digital/analog peripheral; supports CapSense®, LCD 46×16 segment drive, and 1.2–5.5 V I/O domains. |
| Power Management | 0.5–5.5 V supply range; 1 µA sleep mode (RTC + LVD active), 200 nA hibernate (RAM retention); ideal for battery-powered IoT endpoints. |
| Package & Temp | 48-pin SSOP; –40°C to +85°C industrial temperature grade; validated for long-lifecycle industrial and medical equipment deployment. |
Pinout & Package
Package: 48-pin SSOP (Small Outline Integrated Circuit), 0.635 mm pitch, body width 7.5 mm, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core power supply | 1.71–5.5 V analog/digital supply; powers CPU, flash, SRAM, and analog subsystem; requires local decoupling. |
| VSS | Ground reference | Digital and analog ground common point; must be connected to PCB ground plane with low-inductance path. |
| P0[0]–P0[7] | General-purpose I/O port | Configurable as GPIO, analog input, CapSense®, LCD segment/common, or USBIO; supports Schmitt-trigger inputs and strong/pull-up/pull-down outputs. |
| P1[0]–P1[7] | General-purpose I/O port | Same routing flexibility as P0; supports SIO functions including 25 mA sink capability on dedicated pins. |
| XTAL_IN / XTAL_OUT | Crystal oscillator terminals | Supports 4–33 MHz external crystal for high-accuracy timing; required for USB/CAN synchronization and precise RTC operation. |
| USB_DP / USB_DM | USB 2.0 differential pair | Full-speed (12 Mbps) USB physical layer; integrated transceiver eliminates need for external PHY; requires 27 Ω series termination per line. |
| TCK / TMS / TDI / TDO | JTAG debug interface | 4-wire boundary scan and programming interface; compatible with standard JTAG tools for firmware loading and real-time debugging. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB array (24 blocks) | Enables hardware-accelerated logic implementation (e.g., custom UART, PRS generator, quadrature decoder) without CPU overhead. |
| CapSense® on any GPIO | Eliminates external touch controller ICs; supports self- and mutual-capacitance sensing with built-in IDACs and noise rejection algorithms. |
| Digital Filter Block (DFB) | 24-bit, 67 MHz fixed-point engine performing real-time FIR/IIR filtering on ADC data via DMA - no CPU intervention required. |
| Programmable analog blocks | Four uncommitted opamps (25 mA drive), four comparators (95 ns response), and SC/CT blocks configurable as PGA, TIA, or mixer for sensor front-end optimization. |
| Multi-domain I/O voltage support | Up to four independent I/O voltage domains (1.2–5.5 V); allows direct interfacing with legacy 3.3 V, 2.5 V, or 1.8 V peripherals without level shifters. |
Applications
| Industrial HMI Panel | Automotive Diagnostic Tool |
|---|---|
|
Use Scenario: Touch-enabled control panel for PLC operator interface with LCD display and real-time sensor monitoring. IC Role / Device Role / Timing Role: Central PSoC managing CapSense® buttons, 46×16 segment LCD drive, 12-bit ADC for analog sensor inputs, and USB communication to host PC. Use Value: Single-chip integration reduces BOM count by >7 components versus discrete MCU + touch controller + LCD driver + USB PHY solution. |
Use Scenario: Handheld OBD-II scanner reading vehicle ECU data via CAN bus and displaying results on local LCD. IC Role / Device Role / Timing Role: CAN 2.0b controller (16 Rx/8 Tx buffers), USB 2.0 host interface, and 16-bit PWM for backlight control - all synchronized via shared 32.768 kHz RTC clock. Use Value: Eliminates external CAN transceiver and USB bridge IC; firmware-reconfigurable CAN message filters reduce development time for new vehicle protocols. |
| Medical Vital Sign Monitor | Smart Energy Meter Interface |
|
Use Scenario: Portable pulse oximeter acquiring photodiode signals, computing SpO₂, and logging data to onboard EEPROM. IC Role / Device Role / Timing Role: Delta-sigma ADC (16-bit @ 48 ksps, 84 dB SINAD) with programmable gain amplifier front-end; DFB performs real-time IIR filtering of AC-coupled optical signals. Use Value: On-chip analog signal chain achieves <100 µV offset and ±0.2% gain error - meets IEC 60601-2-61 accuracy requirements without calibration hardware. |
Use Scenario: Electricity meter with isolated current/voltage sensing, tamper detection, and RS-485/USB data upload. IC Role / Device Role / Timing Role: Dual ADC channels (one for voltage, one for current), comparator-based zero-crossing detection, and SPI-controlled isolated gate driver for relay control. Use Value: Configurable analog routing allows simultaneous sampling of voltage and current with matched phase delay - essential for Class 0.5 metering accuracy. |
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 |
|---|---|---|---|
| Infineon XMC4504-F100K1024 AC | ARM Cortex-M4F core, 120 MHz, 1024 KB flash, 160 KB RAM; no integrated CapSense® or LCD driver; higher power consumption (12 mA @ 120 MHz). | Targeted at motor control with advanced PWM timers and EtherCAT support; lacks native capacitive touch and segment LCD capabilities. | Select when deterministic floating-point math and field-oriented control are required over human interface features. |
| Microchip PIC32MZ2048EFM100 | MIPS M5150 core, 200 MHz, 2 MB flash, 512 KB RAM; no integrated analog subsystem beyond basic 12-bit SAR ADC; no on-chip USB PHY. | Focused on high-throughput connectivity (Ethernet, USB host/device) and graphics acceleration; minimal analog signal conditioning capability. | Choose for embedded Linux gateway applications requiring large code space and network stack offload, not sensor front-end integration. |
Compared with XMC4504-F100K1024 AC and PIC32MZ2048EFM100, CY8C3866AXI-038 delivers superior analog integration density (20-bit ADC + DFB + opamps + CapSense®) and lower active power (6.6 mA @ 48 MHz vs >12 mA), making it optimal for compact, battery-aware, sensor-rich edge nodes where mixed-signal consolidation matters most.
Availability
CY8C3866AXI-038 is available at Aetrix Electronics and suitable for industrial HMI panels, automotive diagnostic tools, medical vital sign monitors, and smart energy meter interfaces requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for CY8C3866AXI-038 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
Cypress Semiconductor (now part of Infineon Technologies) designs programmable mixed-signal ICs for embedded systems, emphasizing configurability, low-power operation, and system-level integration across industrial, automotive, and consumer markets.
The CY8C38 family targets applications demanding rapid prototyping and late-stage analog/digital reconfiguration - especially human interface (CapSense®, LCD), sensor acquisition (delta-sigma ADC, DFB), and protocol bridging (CAN, USB) in resource-constrained environments.
FAQ
Does CY8C3866AXI-038 support USB device enumeration without external crystal?
Yes. The device integrates a factory-trimmed internal oscillator capable of ±0.25% accuracy across voltage and temperature, meeting USB full-speed (12 Mbps) specification requirements. External crystal is optional and used only when higher timing precision is needed for concurrent CAN or RTC operation.
What is the maximum achievable resolution and sample rate for the delta-sigma ADC?
The delta-sigma ADC supports 20-bit resolution at 12 ksps (with digital filtering), 16-bit at 48 ksps (84 dB SINAD, ±2 LSB INL), and 12-bit at 192 ksps (66 dB SINAD, ±1 LSB INL). Resolution and rate are trade-offs configured via firmware using PSoC Creator's ADC component parameters.
Can CapSense® operate reliably in noisy industrial environments?
Yes. CapSense® uses spread-spectrum frequency hopping, shield-driven guard sensors, and adaptive baseline tracking to reject 50/60 Hz noise and ESD transients. Measured immunity exceeds 8 kV contact discharge per IEC 61000-4-2 when configured with dual-IDAC current sources and synchronous sampling.
Is the 2 KB EEPROM truly endurance-rated to 1 million write cycles?
Yes. Cypress specifies 1 million erase/write cycles with 20-year data retention at 85°C, verified through accelerated life testing. The EEPROM is implemented in dedicated flash sectors with wear-leveling firmware support in PSoC Creator's EEPROM component library.
CY8C3866AXI-038 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C38xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 67MHz
- Connectivity:
- EBI/EMI, I2C, LINbus, SPI, UART/USART
- Peripherals:
- CapSense, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 62
- 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:
CY8C3866AXI-038 FAQ
1.How can I place an order for CY8C3866AXI-038 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3866AXI-038 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 CY8C3866AXI-038 reliable?
The price and inventory of CY8C3866AXI-038 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3866AXI-038 is usually 5 days.
3.What payment methods are accepted for CY8C3866AXI-038?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3866AXI-038 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3866AXI-038?
CY8C3866AXI-038 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3866AXI-038 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 CY8C3866AXI-038?
For technical support, including CY8C3866AXI-038 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3866AXI-038 requirements.
6.How does Aetrix verify that CY8C3866AXI-038 is sourced from the original manufacturer or authorized distributors?
All CY8C3866AXI-038 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 CY8C3866AXI-038 meets industry standards.
7.What is the process for return or replacement of CY8C3866AXI-038?
All CY8C3866AXI-038 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3866AXI-038, 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 CY8C3866AXI-038 part is unused and in its original packaging.
Return procedure for CY8C3866AXI-038:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C3866AXI-038 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
