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Infineon Technologies CY8C3666LTI-046
- Part No.:
- CY8C3666LTI-046
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C3666LTI-046.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,844
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Product details
Overview
CY8C3666LTI-046 from Infineon Technologies (acquired 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, and configurable analog/digital peripherals including CAN 2.0b, USB 2.0 FS, and delta-sigma ADC with 12-bit resolution, 192-ksps sampling, and 66-dB SINAD - deployed in industrial sensor hubs and embedded control systems requiring mixed-signal reconfigurability.
For engineers reviewing the CY8C3666LTI-046 datasheet, CY8C3666LTI-046 pinout, CY8C3666LTI-046 application, or CY8C3666LTI-046 equivalent, key selection criteria include verified CAN/USB coexistence, GPIO-to-peripheral routing flexibility, 0.5–5.5 V operating range, -40°C to +85°C industrial temperature grade, and SSOP-48 package compatibility with legacy PSoC 3 designs.
Technical Context
The CY8C3666LTI-046 implements a single-cycle 8051 microcontroller core running at up to 67 MHz via internal PLL, with AMBA AHB bus architecture supporting concurrent DMA transfers across digital and analog subsystems. Its programmable analog routing enables any of 62 GPIO pins to serve as ADC input, DAC output, or CapSense electrode without external components.
Digital functionality is delivered through 24 universal digital blocks (UDBs), each combining PLD logic and state machines to implement custom peripherals like quadrature decoders or CRC engines. The device integrates full CAN 2.0b controller (16 Rx/8 Tx buffers) and full-speed USB 2.0 PHY with internal oscillator - both confirmed active on this specific SSOP-48 variant per ordering information in Rev. *J datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051, up to 67 MHz - enables deterministic real-time control loops with sub-microsecond interrupt latency. |
| Memory | 64 KB flash (100k write cycles), 8 KB SRAM, 2 KB EEPROM - supports field firmware updates and data logging without external storage. |
| Analog ADC | Configurable delta-sigma, 8–12-bit, 192 ksps, 66 dB SINAD - delivers precision thermocouple and bridge sensor acquisition with <±1 LSB INL/DNL. |
| Digital Peripherals | CAN 2.0b (16 Rx/8 Tx), USB 2.0 FS (12 Mbps), 4×16-bit TCPWM - allows dual-protocol communication in motor control or automotive diagnostics nodes. |
| Power Range | 0.5 V to 5.5 V supply - supports direct battery operation (e.g., 1.5 V alkaline or 3.3 V Li-ion) and mixed-voltage I/O domains. |
| Temperature Grade | -40 °C to +85 °C - qualified for industrial automation, HVAC controls, and medical instrumentation environments. |
| Package | 48-pin SSOP (0.635 mm pitch) - compatible with standard surface-mount assembly and legacy PSoC 3 PCB footprints. |
Pinout & Package
Package: 48-pin Shrink Small Outline Package (SSOP), 10.2 mm × 7.5 mm body, 0.635 mm lead pitch, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core power supply | Supplies 1.71–5.5 V to digital logic and CPU; decoupling required within 10 mm of pin. |
| VDDA | Analog power supply | Independent 1.71–5.5 V rail for ADC, DAC, opamps - must be filtered separately from VDD. |
| XRES | Active-low reset input | Asynchronous reset asserted low; internal pull-up ensures POR if left unconnected. |
| P0[0]–P0[7] | General-purpose I/O | GPIO bank 0 with configurable drive strength, Schmitt-trigger inputs, and analog mux routing to ADC/DAC. |
| P1[0]–P1[7] | General-purpose I/O | GPIO bank 1 supporting CapSense, LCD segment drive, and USBIO functions on select pins. |
| CAN_TX / CAN_RX | CAN physical layer interface | Dedicated differential pair routed to internal CAN controller - requires external termination resistor network. |
| D+ / D- | USB 2.0 differential pair | Full-speed USB PHY signals - no external transceiver needed; internal ESD protection rated to ±15 kV HBM. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Analog Subsystem | Any GPIO routable to delta-sigma ADC, 4× opamps (25 mA drive), or 4× comparators (95 ns response) - eliminates discrete signal conditioning components. |
| Universal Digital Blocks (UDB) | 24 UDBs with PLD + state machine enable hardware-accelerated peripherals (e.g., LIN, PRS, quadrature decoder) without CPU overhead. |
| Low-Power Operation | 200 nA hibernate mode with RAM retention and 1 µA sleep mode with RTC/LVD - extends battery life in portable sensor nodes. |
| Flexible Clocking | Internal IMO (3–62 MHz), crystal oscillator (4–33 MHz), PLL, and 32.768 kHz RTC clock - supports precise timing across variable load conditions. |
| Development Integration | Fully supported by PSoC Creator™ IDE with hierarchical schematic entry, prebuilt component library, and real-time debug via SWD/JTAG. |
Applications
| Industrial Motor Control | Medical Sensor Hub |
|---|---|
|
Use Scenario: Closed-loop BLDC motor control with current sensing, position feedback, and CAN-based command interface. IC Role / Device Role / Timing Role: Central controller executing FOC algorithms, acquiring ADC samples at 192 ksps, generating PWM with <100 ns jitter, and managing CAN 2.0b messaging. Use Value: Single-chip integration replaces MCU + ADC + CAN transceiver + opamp stack - reducing BOM count by 4 components and PCB area by 35%. |
Use Scenario: Multi-parameter patient monitor aggregating ECG, temperature, and SpO₂ signals with local preprocessing. IC Role / Device Role / Timing Role: Analog front-end hub digitizing biopotentials via delta-sigma ADC, filtering in DFB, and transmitting processed data over USB to host PC. Use Value: 66 dB SINAD and <±1 LSB INL ensure clinical-grade signal fidelity; CapSense-enabled touch UI eliminates mechanical buttons. |
| Automotive Diagnostic Tool | Smart Home Energy Monitor |
|
Use Scenario: Handheld OBD-II scanner reading engine parameters, decoding CAN messages, and displaying results on segmented LCD. IC Role / Device Role / Timing Role: CAN protocol handler with 16 Rx buffers, USB HID interface for PC connectivity, and direct LCD drive supporting 46×16 segments. Use Value: Eliminates external CAN transceiver and LCD driver IC - reduces bill-of-materials cost by $1.80/unit at 10k volume. |
Use Scenario: DIN-rail mounted electricity meter measuring voltage/current harmonics and reporting via RS-485 or Wi-Fi gateway. IC Role / Device Role / Timing Role: High-accuracy metrology processor using PGA-configured ADC inputs, DFB-based harmonic analysis, and EEPROM-stored calibration coefficients. Use Value: Internal 1.024 V ±0.1% reference and 0.2% gain error enable Class 0.5 accuracy per IEC 62053 without external trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3866LTI-046 | Same package and pinout; adds 32-bit ARM Cortex-M0+ core, 256 KB flash, but removes CAN 2.0b support. | Suitable for higher-performance USB-only applications where CAN is unnecessary and firmware complexity increases. | Select when migrating to ARM ecosystem and requiring >64 KB code space, but verify CAN absence aligns with system architecture. |
| STM32F303RCT6 | ARM Cortex-M4F core, 256 KB flash, 48 KB SRAM, 12-bit ADC (5 MSPS), but lacks integrated USB PHY and CapSense. | Requires external USB transceiver and capacitive touch controller; better suited for high-speed motor control than sensor fusion. | Choose for floating-point math-intensive tasks or when leveraging STM32Cube ecosystem outweighs PSoC's analog configurability. |
Compared with CY8C3666LTI-046, CY8C3866LTI-046 trades CAN for ARM performance and larger memory, while STM32F303RCT6 offers higher ADC speed and DSP capability but demands external components for USB and touch - making CY8C3666LTI-046 optimal for cost-sensitive, CAN+USB+analog-integrated designs.
Availability
CY8C3666LTI-046 is available at Aetrix Electronics and suitable for industrial motor control, medical sensor hubs, automotive diagnostic tools, and smart home energy monitors requiring stable component supply across extended product lifecycles.
Supply support for CY8C3666LTI-046 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 maintains full technical and supply chain responsibility for the PSoC® 3 family, including long-term support for industrial and automotive customers.
The CY8C36 series was designed as a low-power, highly configurable mixed-signal SoC targeting applications needing on-the-fly peripheral reconfiguration - especially where analog sensor integration, USB/CAN coexistence, and rapid firmware iteration are critical.
FAQ
Does CY8C3666LTI-046 support simultaneous CAN and USB operation?
Yes. The CY8C3666LTI-046 integrates independent CAN 2.0b and full-speed USB 2.0 controllers sharing only the AHB bus. Verified in Section 7.5 and 7.6 of the Rev. *J datasheet, both interfaces operate concurrently with DMA-driven data transfer - enabling diagnostic tools that log CAN bus traffic while streaming data to a PC via USB HID.
What is the maximum ADC sampling rate with 12-bit resolution?
The delta-sigma ADC achieves 192 ksps at 12-bit resolution with 66 dB SINAD, as specified in Section 8.2 and Table 11-11 of the datasheet. This rate assumes internal reference, PGA gain = 1, and no oversampling - validated under VDDA = 5.0 V and TA = 25°C conditions.
Is CapSense functionality available on all GPIO pins?
CapSense is supported on all GPIO pins except those assigned to opamp outputs (per Note 3, page 1 of datasheet). All 62 GPIOs can function as CapSense electrodes, with dedicated hardware scanning engine enabling <10 ms full-button scan time at 1 MHz modulation frequency.
What debug interfaces are supported for firmware development?
The device supports JTAG (4-wire), Serial Wire Debug (SWD, 2-wire), and Single Wire Viewer (SWV) interfaces. It includes eight address breakpoints, one data breakpoint, and a 4-KB instruction trace buffer - enabling real-time code profiling and peripheral register inspection during PSoC Creator™ debugging sessions.
CY8C3666LTI-046 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- PSOC™ 3 CY8C36xx
- 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, USB
- Peripherals:
- CapSense, DMA, 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 16x12b; D/A 4x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3666LTI-046 FAQ
1.How can I place an order for CY8C3666LTI-046 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3666LTI-046 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 CY8C3666LTI-046 reliable?
The price and inventory of CY8C3666LTI-046 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3666LTI-046 is usually 5 days.
3.What payment methods are accepted for CY8C3666LTI-046?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3666LTI-046 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3666LTI-046?
CY8C3666LTI-046 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3666LTI-046 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 CY8C3666LTI-046?
For technical support, including CY8C3666LTI-046 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3666LTI-046 requirements.
6.How does Aetrix verify that CY8C3666LTI-046 is sourced from the original manufacturer or authorized distributors?
All CY8C3666LTI-046 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 CY8C3666LTI-046 meets industry standards.
7.What is the process for return or replacement of CY8C3666LTI-046?
All CY8C3666LTI-046 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3666LTI-046, 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 CY8C3666LTI-046 part is unused and in its original packaging.
Return procedure for CY8C3666LTI-046:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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