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Infineon Technologies CY8C3446AXI-099T
- Part No.:
- CY8C3446AXI-099T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3446AXI-099T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
CY8C3446AXI-099T from Infineon Technologies (formerly Cypress) 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 in a 100-pin TQFP package. It operates from 1.71–5.5 V across –40 to +85 °C and supports ultra-low-power hibernate mode (200 nA with RAM retention), targeting embedded control in industrial sensing and automotive body electronics.
For engineers reviewing the CY8C3446AXI-099T datasheet, CY8C3446AXI-099T pinout, CY8C3446AXI-099T application, or CY8C3446AXI-099T equivalent, key selection criteria include its integrated CAN+USB dual-interface capability, 24-channel DMA, programmable UDB array for custom logic synthesis, and CapSense® support for touch HMI - all within a single-chip mixed-signal architecture.
Technical Context
The CY8C3446AXI-099T implements a tightly coupled 8051 CPU core running at up to 50 MHz via internal PLL, paired with a digital subsystem built around 24 Universal Digital Blocks (UDBs) that support reconfigurable peripherals including UART, SPI, LIN, CRC, quadrature decoders, and gate-level logic. Its analog subsystem includes a delta-sigma ADC (8–12-bit), two opamps, four comparators, two DACs, and two SC/CT blocks for PGA/TIA/mixer functions.
System-level integration is enabled by flexible routing: any analog or digital peripheral function can be routed to any GPIO, supported by 12 programmable clock dividers and four independent power domains. The device includes dedicated CAN 2.0b controller (16 Rx/8 Tx buffers), USB 2.0 FS PHY with internal oscillator (12 Mbps), and JTAG/SWD debug interfaces - all operating under unified power management with active (1.2 mA @ 6 MHz), sleep (1 µA), and hibernate (200 nA) modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051, up to 50 MHz - enables deterministic real-time control with legacy 8051 toolchain compatibility. |
| Memory | 64 KB flash (with ECC), 8 KB SRAM, 2 KB EEPROM - supports secure firmware storage, runtime data logging, and parameter retention across power cycles. |
| Digital Peripherals | 24 UDBs + 4 TCPWM blocks + I²C (1 Mbps) + Full CAN 2.0b (16 Rx/8 Tx) - allows concurrent motor control, sensor comms, and vehicle bus interfacing without external ICs. |
| Analog Peripherals | Configurable delta-sigma ADC (8–12-bit), 2× DAC, 4× comparator, 2× opamp, SC/CT blocks - enables precision signal conditioning for current/voltage sensing and closed-loop analog feedback. |
| Power Management | 1.71–5.5 V supply, 200 nA hibernate with RAM retention - suitable for battery-powered nodes requiring long-term wake-on-event operation. |
| Package & I/O | 100-pin TQFP, 72 I/O pins (62 GPIO + 8 SIO), USBIO pins, CapSense® on any GPIO - provides high pin count with robust analog/digital routing and touch interface scalability. |
| Clock System | Internal IMO (3–62 MHz, ±2% @3 MHz), PLL, 32.768 kHz RTC crystal input, 12 routable clock dividers - delivers precise timing for USB, CAN, and real-time scheduling with minimal external components. |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual-domain supply pins supporting up to four independent voltage domains (1.2–5.5 V) for mixed-voltage I/O interfacing. |
| P0[0]–P0[7], P1[0]–P1[7], etc. | General-purpose I/O (GPIO) | 72 total I/O pins; all support analog/digital routing, CapSense®, LCD drive (up to 46×16), and configurable thresholds/slew rates. |
| SIO[0]–SIO[7] | Performance I/O | 8 high-drive pins (25 mA sink), overvoltage tolerant (up to 5.5 V), hot-swap capable - ideal for direct connection to sensors, LEDs, or industrial buses. |
| USBDP/USBDM | USB 2.0 Full-Speed differential pair | Integrated USB PHY with internal oscillator eliminates need for external crystal; supports 12 Mbps enumeration and HID/CDC class operation. |
| CANRX/CANTX | CAN 2.0b physical layer interface | Dedicated differential transceiver pins with internal termination and filtering - enables direct connection to ISO 11898-2 compliant CAN bus. |
| XRES, XIN/XOUT | Reset and external crystal oscillator | Hardware reset input and 4–25 MHz crystal interface for high-accuracy timing; optional 32.768 kHz RTC crystal input available. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable UDB Array | 24 universal digital blocks enable synthesis of custom digital logic (e.g., PRS generators, CRC engines, protocol accelerators) without FPGA complexity or cost. |
| CapSense® Integration | Support for up to 62 self- or mutual-capacitance sensors directly on GPIO - eliminates external touch controller IC and reduces BOM for HMI applications. |
| Dual High-Speed Interfaces | Simultaneous CAN 2.0b (1 Mbps) and USB 2.0 FS (12 Mbps) operation - enables bridging between automotive networks and PC-based configuration tools in one chip. |
| Ultra-Low-Power Hibernate | 200 nA retention mode with full RAM state preserved - allows rapid wake-up (<1 µs) from deep sleep for event-driven sensing in energy-constrained systems. |
| Flexible Clock Architecture | 12 programmable clock dividers routed to any peripheral - simplifies timing design for mixed-speed subsystems (e.g., 48 MHz CPU, 1 MHz ADC, 125 kHz PWM). |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
|
Use Scenario: Closed-loop BLDC motor control in HVAC blowers or pump modules with position feedback, current sensing, and thermal monitoring. IC Role / Device Role / Timing Role: Central controller executing commutation logic, ADC sampling (current/voltage), PWM generation (4× TCPWM), and CAN diagnostics reporting. Use Value: Eliminates discrete opamps, comparators, and CAN transceiver; achieves <1 µs interrupt latency and synchronized 16-bit PWM resolution. |
Use Scenario: Door module managing window lift, mirror fold, seat position memory, and interior lighting via LIN/CAN network. IC Role / Device Role / Timing Role: Mixed-signal hub handling analog sensor inputs (potentiometers, thermistors), driving relays/LEDs, and communicating via CAN 2.0b and LIN 2.0. Use Value: Reduces component count by integrating 4× comparators, 2× DACs, and LIN transceiver logic - enabling compact 4-layer PCB design. |
| Medical Patient Monitor Front-End | Smart Home Touch Interface |
|
Use Scenario: Vital sign acquisition unit measuring ECG, SpO₂, and temperature with analog front-end conditioning and wireless telemetry. IC Role / Device Role / Timing Role: Analog subsystem performs PGA gain adjustment, delta-sigma ADC conversion (12-bit @ 1 kSPS), and opamp-based filter stages; USB handles data streaming. Use Value: Achieves <85 dB SNR with on-chip reference (1.024 V ±1%) and programmable SC/CT blocks - avoids external precision opamps and references. |
Use Scenario: Wall-mounted thermostat or lighting panel with capacitive touch buttons, ambient light sensing, and Zigbee/Bluetooth coexistence. IC Role / Device Role / Timing Role: CapSense® engine scans 24 touch keys while simultaneously managing I²C sensor reads and generating PWM dimming signals. Use Value: Supports wet-finger tolerance and proximity wake-up using same GPIOs - no dedicated touch ASIC required, reducing BOM and layout area. |
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 |
|---|---|---|---|
| CY8C3446LTI-099 | Same die, 68-pin QFN package, lower I/O count (48 GPIO), no USBIO pins | Lacks USB 2.0 FS interface and reduced analog routing flexibility - unsuitable for USB-CDC bridge or high-channel CapSense® designs | Select when board space is constrained and USB/CAN dual-interface not required; cost-optimized for simpler control tasks. |
| CY8C5868AXI-LP097 | 32-bit ARM Cortex-M3 core, 256 KB flash, higher power (20 mA active), different peripheral set (no native CAN, USB only HS) | Requires external CAN transceiver; lacks CapSense® hardware acceleration and SC/CT analog blocks - increases BOM and firmware overhead | Choose for higher computational throughput (e.g., sensor fusion, RTOS), but expect added complexity in analog signal chain and bus interface design. |
Compared with CY8C3446LTI-099 and CY8C5868AXI-LP097, the CY8C3446AXI-099T uniquely balances 8-bit determinism, integrated CAN+USB PHY, and analog configurability - making it optimal for cost-sensitive, low-power, mixed-signal edge nodes where hardware-accelerated peripherals reduce firmware load and PCB layers.
Availability
CY8C3446AXI-099T is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, medical patient monitors, and smart home touch interfaces requiring stable component supply, long-lifecycle support, and qualified automotive-grade packaging.
Supply support for CY8C3446AXI-099T 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 with global manufacturing and quality infrastructure.
The CY8C3446AXI-099T belongs to the PSoC® 3 family - designed specifically for ultra-low-power, highly integrated embedded control applications requiring both programmable analog and digital logic on a single chip, with emphasis on rapid prototyping and reduced system-level component count.
FAQ
Does CY8C3446AXI-099T support USB device enumeration without an external crystal?
Yes. The device integrates a factory-trimmed internal oscillator (IMO) qualified for USB 2.0 Full-Speed operation at 48 MHz, enabling reliable enumeration and 12 Mbps data transfer without external crystal or capacitor components. This is confirmed in the USB section (Section 7.6) of the CY8C34 Family Datasheet (001-53304 Rev. AA), and validated by USB-IF certification TID#40770053.
What is the maximum number of CapSense® sensors supported on this part?
The CY8C3446AXI-099T supports up to 62 CapSense® sensors using any GPIO pin, with hardware-accelerated scanning and noise immunity features including shield electrode support and adjacent-key suppression. This capability is documented in Section 8.7 of the datasheet and verified in PSoC Creator v4.x component libraries for CY8C34 devices.
Can the internal boost regulator power external circuitry?
No. The internal boost regulator (0.5 V input → 5 V output) is strictly for internal use only - powering the USB PHY and select analog blocks. It is not accessible at any pin and cannot source current to external loads. External 5 V rails must be supplied independently, as stated in Section 6.2 (Power System) and Absolute Maximum Ratings (Section 11.1) of the datasheet.
Is the CAN controller compatible with ISO 11898-2 physical layer?
Yes. The integrated CAN 2.0b controller supports standard message framing and bit timing, and is designed to interface directly with ISO 11898-2 compliant transceivers (e.g., TJA1042, SN65HVD230). While the CY8C3446AXI-099T does not include a physical transceiver, its CANRX/CANTX pins meet the electrical requirements for connection to industry-standard CAN drivers per Section 7.5 of the datasheet.
CY8C3446AXI-099T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C34xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 50MHz
- Connectivity:
- EBI/EMI, I2C, LINbus, SPI, UART/USART, USB
- 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-099T FAQ
1.How can I place an order for CY8C3446AXI-099T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3446AXI-099T 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-099T reliable?
The price and inventory of CY8C3446AXI-099T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3446AXI-099T is usually 5 days.
3.What payment methods are accepted for CY8C3446AXI-099T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3446AXI-099T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3446AXI-099T?
CY8C3446AXI-099T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3446AXI-099T 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-099T?
For technical support, including CY8C3446AXI-099T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3446AXI-099T requirements.
6.How does Aetrix verify that CY8C3446AXI-099T is sourced from the original manufacturer or authorized distributors?
All CY8C3446AXI-099T 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-099T meets industry standards.
7.What is the process for return or replacement of CY8C3446AXI-099T?
All CY8C3446AXI-099T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3446AXI-099T, 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-099T part is unused and in its original packaging.
Return procedure for CY8C3446AXI-099T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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