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Infineon Technologies CY8C3446AXI-105
- Part No.:
- CY8C3446AXI-105
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3446AXI-105.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:895
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Product details
Overview
CY8C3446AXI-105 from Infineon Technologies (formerly Cypress Semiconductor) is a programmable 8-bit PSoC® 3 system-on-chip integrating an 8051 CPU, 64 KB flash, 8 KB RAM, full CAN 2.0b interface, USB 2.0 Full-Speed peripheral, and configurable analog/digital peripherals on a single die. It operates from 1.71–5.5 V across –40 to +85 °C, supports up to 50 MHz clocking via internal PLL, and targets embedded control in industrial sensing and automotive body electronics.
For engineers reviewing the CY8C3446AXI-105 datasheet, CY8C3446AXI-105 pinout, CY8C3446AXI-105 application, or CY8C3446AXI-105 equivalent, key selection criteria include its 68-pin QFN package, dual opamps with programmable gain amplifier (PGA) capability, CapSense® support for up to 62 sensors, 24-channel DMA controller, and integrated 12-bit delta-sigma ADC with 1.024 V ±1% reference.
Technical Context
The CY8C3446AXI-105 implements a highly configurable mixed-signal architecture centered on an enhanced 8051 core running at up to 50 MHz, backed by a 24-channel PHUB-based DMA controller and flexible digital routing via Digital System Interconnect (DSI). Its analog subsystem includes two independent opamps, four comparators, and two programmable SC/CT blocks supporting TIA, PGA, and mixer topologies.
It integrates full CAN 2.0b with 16 Rx and 8 Tx buffers, USB 2.0 FS (12 Mbps) using internal oscillator, and a 12-bit delta-sigma ADC with configurable resolution and input range. Clocking is managed through multiple sources: IMO (3–62 MHz), ILO (1/33/100 kHz), external crystal (4–25 MHz), and 32.768-kHz watch crystal - all routed via 12 programmable dividers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Enhanced 8-bit 8051, up to 50 MHz operation - enables deterministic real-time control with low interrupt latency. |
| Flash Memory | 64 KB program flash with cache and security features - supports firmware updates and secure boot implementation. |
| RAM | 8 KB SRAM - sufficient for multitasking firmware with sensor fusion and communication stacks. |
| Analog Peripherals | 12-bit delta-sigma ADC, two 8-bit DACs, four comparators, two opamps, two SC/CT blocks - enables precision signal conditioning without external components. |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx), USB 2.0 FS (12 Mbps), I²C (1 Mbps), UART, SPI, LIN 2.0 - supports multi-protocol connectivity in vehicle ECUs and industrial nodes. |
| Power Modes | Active (1.2 mA @ 6 MHz), Sleep (1 µA), Hibernate (200 nA with RAM retention) - extends battery life in portable and remote monitoring systems. |
| I/O Capability | 62 GPIOs with flexible routing, 8 SIO pins (25 mA sink, overvoltage tolerant), USBIO pins - allows direct interface to sensors, actuators, and displays without level-shifting. |
Pinout & Package
The CY8C3446AXI-105 is housed in a 68-pin QFN package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad, optimized for compact industrial and automotive PCB layouts requiring high I/O density and thermal efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA/VDDD | Analog/Digital Power Supply | Separate 1.71–5.5 V domains enable noise-isolated analog operation while maintaining digital logic integrity. |
| P0[0]–P0[7] | General-Purpose I/O | Configurable as GPIO, analog input, or routed to any digital/analog peripheral - supports CapSense®, LCD drive, or PWM output. |
| P1[0]–P1[7] | Performance I/O (SIO) | 25 mA sink capability, programmable thresholds, comparator function - suitable for driving LEDs, relays, or interfacing with noisy industrial signals. |
| USB_DP/USB_DM | USB 2.0 Full-Speed Interface | Differential pair supporting 12 Mbps data transfer without external PHY - reduces BOM cost and board area. |
| CAN_TX/CAN_RX | CAN 2.0b Transceiver Interface | Direct connection to external CAN transceiver (e.g., TJA1042) - enables robust automotive network node implementation. |
| XRES | External Reset Input | Active-low asynchronous reset with internal pull-up - ensures reliable startup and fault recovery in harsh environments. |
Key Features
| Feature | Design Value |
|---|---|
| CapSense® Support | Up to 62 self- or mutual-capacitance sensors with hardware-accelerated scanning - enables touch interfaces without dedicated controller IC. |
| Programmable Analog Blocks | Two SC/CT blocks configurable as PGA, TIA, mixer, or sample-and-hold - replaces discrete opamp networks and reduces calibration complexity. |
| Flexible Clocking | Multiple internal/external clock sources with 12 routable dividers - simplifies timing design across mixed-signal subsystems and eliminates external clock generators. |
| UDB-Based Digital Logic | 24 Universal Digital Blocks supporting custom timers, CRC, PRNG, quadrature decoding, or gate-level logic - enables hardware acceleration of algorithmic functions in firmware. |
| Secure Bootloader | Flash-based bootloader supporting I²C, SPI, UART, and USB programming - enables field firmware updates with authentication and rollback protection. |
Applications
| Automotive Body Control Module | Industrial Sensor Node |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, and interior lighting in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Main MCU managing CAN bus communication, analog sensor acquisition (temperature, humidity), and PWM-driven motor control. Use Value: Integrated CAN 2.0b and 24-channel DMA allow concurrent message handling and sensor sampling without CPU overhead, improving response time and EMI resilience. |
Use Scenario: Battery-powered wireless sensor hub collecting pressure, current, and ambient light data in factory automation. IC Role / Device Role / Timing Role: Low-power system controller performing analog front-end conditioning, CapSense® button interface, and USB/UART data upload. Use Value: 200 nA hibernate mode with RAM retention preserves context during sleep cycles, extending operational life beyond 5 years on coin-cell power. |
| Medical Patient Monitor Front-End | Smart Home Touch Interface |
Use Scenario: Signal acquisition and preprocessing for ECG, SpO₂, and temperature in portable diagnostic devices. IC Role / Device Role / Timing Role: Analog subsystem hub digitizing biopotential signals via delta-sigma ADC and PGA, with real-time filtering in UDBs. Use Value: On-chip 1.024 V ±1% reference and programmable gain amplifier eliminate external precision references and reduce analog BOM by ≥4 components. |
Use Scenario: Wall-mounted control panel with capacitive touch sliders, LED dimming, and local Zigbee/Bluetooth coexistence. IC Role / Device Role / Timing Role: CapSense® engine and PWM generator managing multi-segment touch UI and synchronized LED backlight control. Use Value: Direct GPIO-based LCD drive (up to 46×16 segments) and CapSense® hardware acceleration offload host processor, enabling smooth UI at <100 µA average current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3866AXI-063 | Higher flash (128 KB), same 68-pin QFN, but lacks USB FS interface and has reduced CAN buffer count (8 Rx/4 Tx). | Better suited for firmware-intensive applications without USB connectivity requirements. | Select when larger code space is critical and USB/CAN bandwidth demands are lower. |
| STM32F303VCT6 | ARM Cortex-M4F core, 256 KB flash, 48 KB RAM, no integrated CapSense® or SC/CT analog blocks. | Requires external components for capacitive sensing and precision analog front-end design. | Prefer when floating-point math, higher clock speed (>72 MHz), or RTOS scalability outweighs analog integration benefits. |
Compared with CY8C3446AXI-105, CY8C3866AXI-063 trades USB and CAN capacity for doubled flash, while STM32F303VCT6 offers superior compute performance but increases analog BOM and layout complexity due to missing on-die mixed-signal configurability.
Availability
CY8C3446AXI-105 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, medical front-ends, and smart home interfaces requiring stable component supply, long-term lifecycle support, and qualified production-grade silicon.
Supply support for CY8C3446AXI-105 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, delivering high-reliability semiconductor solutions for automotive, industrial, and IoT markets.
The CY8C34 family belongs to Infineon's PSoC® 3 programmable SoC product line, designed specifically for ultra-low-power, mixed-signal embedded control where analog integration, flexible routing, and rapid prototyping reduce system cost and time-to-market.
FAQ
Does CY8C3446AXI-105 support USB device enumeration without external crystal?
Yes. The device integrates an internal oscillator certified for USB 2.0 Full-Speed (12 Mbps) operation per TID#40770053, eliminating the need for an external 48 MHz crystal. This oscillator achieves ±0.25% accuracy across voltage and temperature, meeting USB specification jitter requirements for reliable enumeration and data transfer.
What is the maximum operating frequency of the 8051 core in CY8C3446AXI-105?
The 8051 core runs at up to 50 MHz, achieved via internal PLL multiplication of the IMO (Internal Main Oscillator) or external crystal input. At this frequency, instruction execution reaches 25 MIPS with single-cycle 8051 instructions, enabling real-time processing of CAN messages, ADC conversions, and CapSense® scans concurrently.
Can the two opamps be used simultaneously with the delta-sigma ADC?
Yes. Both opamps can operate concurrently with the 12-bit delta-sigma ADC, as they share independent bias and routing paths. Each opamp may serve as a programmable gain amplifier ahead of ADC inputs, and the ADC supports simultaneous sampling on up to 16 channels using hardware sequencer control - verified in the device's Electrical Specifications table (Section 11.5).
Is the 68-pin QFN package RoHS-compliant and lead-free?
Yes. The CY8C3446AXI-105 68-pin QFN package is RoHS-compliant and lead-free, with matte tin (Sn) termination finish. It meets JEDEC J-STD-020D moisture sensitivity level 3 (MSL-3) and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards, ensuring compatibility with standard SMT assembly processes.
CY8C3446AXI-105 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C34xx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 50MHz
- 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 16x12b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3446AXI-105 FAQ
1.How can I place an order for CY8C3446AXI-105 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3446AXI-105 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 CY8C3446AXI-105 reliable?
The price and inventory of CY8C3446AXI-105 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3446AXI-105 is usually 5 days.
3.What payment methods are accepted for CY8C3446AXI-105?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3446AXI-105 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3446AXI-105?
CY8C3446AXI-105 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3446AXI-105 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 CY8C3446AXI-105?
For technical support, including CY8C3446AXI-105 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3446AXI-105 requirements.
6.How does Aetrix verify that CY8C3446AXI-105 is sourced from the original manufacturer or authorized distributors?
All CY8C3446AXI-105 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 CY8C3446AXI-105 meets industry standards.
7.What is the process for return or replacement of CY8C3446AXI-105?
All CY8C3446AXI-105 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3446AXI-105, 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 CY8C3446AXI-105 part is unused and in its original packaging.
Return procedure for CY8C3446AXI-105:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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