My Inquiry
My Account
Infineon Technologies CY8C3446AXI-105T
- Part No.:
- CY8C3446AXI-105T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3446AXI-105T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,858
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY8C3446AXI-105T 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 50 MHz, supports CapSense® for touch sensing, and delivers ultra-low-power operation down to 200 nA in hibernate mode with RAM retention. It is used in industrial HMI, medical sensor nodes, and automotive body control modules requiring mixed-signal integration and field-upgradable firmware.
For engineers reviewing the CY8C3446AXI-105T datasheet, CY8C3446AXI-105T pinout, CY8C3446AXI-105T application, or CY8C3446AXI-105T equivalent, this page provides verified technical context, package mapping, validated pin functions, real-world use scenarios, and confirmed alternative parts - all derived from the official Infineon CY8C34 Family Datasheet (001-53304 Rev. AA).
Technical Context
The CY8C3446AXI-105T implements a fully integrated 8051-based microcontroller subsystem with 24-channel DMA, programmable digital routing via Digital System Interconnect (DSI), and dual-domain clocking (IMO, PLL, ILO, crystal). Its analog subsystem includes a configurable delta-sigma ADC (8–12-bit), two DACs, four comparators, two opamps, and two SC/CT blocks supporting PGA, TIA, and mixer configurations.
Digital flexibility is enabled by 24 Universal Digital Blocks (UDBs), each combining PAL/PLD logic and state machines to synthesize UART, SPI, LIN, CRC, quadrature decoders, or custom logic. The device supports full CAN 2.0b with 16 Rx and 8 Tx buffers, USB 2.0 Full-Speed (12 Mbps) using internal oscillator, and CapSense® for up to 62 self- or mutual-capacitance sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051, up to 50 MHz - enables deterministic real-time control with low interrupt latency and legacy code compatibility. |
| Flash / RAM | 64 KB flash + 8 KB RAM - sufficient for complex firmware with bootloader, CapSense tuning, and communication stacks. |
| Operating Voltage | 1.71–5.5 V - supports direct battery operation (Li-ion, coin cell) and mixed-voltage board design across up to six power domains. |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep - enables multi-year battery life in wireless sensor endpoints without external RTC. |
| Analog Peripherals | Configurable delta-sigma ADC (8–12-bit), 2× DAC, 4× comparator, 2× opamp, 2× SC/CT blocks - supports precision sensor signal conditioning and closed-loop analog control. |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx), USB 2.0 FS (12 Mbps), I²C (1 Mbps), 4× TCPWM - meets automotive body electronics and industrial fieldbus requirements. |
| I/O Flexibility | Up to 62 GPIOs, any peripheral routed to any pin, 8 SIO pins (25 mA sink, overvoltage tolerant) - simplifies PCB layout and enables reuse across variants. |
Pinout & Package
The CY8C3446AXI-105T is housed in a 68-pin QFN (9 mm × 9 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments are defined per the CY8C34 Family Datasheet Section 2 (Pinouts) and Section 3 (Pin Descriptions), and include dedicated USBIO, SIO, CapSense, analog reference, and debug (SWD/JTAG) pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA / VDDD | Analog/Digital Supply | Separate 1.71–5.5 V domains enable noise isolation between analog and digital sections. |
| P0[0]–P0[7] | General-purpose I/O | Support CapSense, LCD drive, or digital peripheral routing; configurable as SIO with 25 mA sink capability. |
| USB_DP / USB_DM | USB 2.0 Full-Speed Interface | Dedicated differential pair compliant with USB specification; requires no external PHY. |
| TX / RX | UART Serial Interface | Programmable UDB-based UART; supports baud rates up to 1 Mbps with hardware flow control. |
| SWDIO / SWCLK | Serial Wire Debug | 2-wire debug interface compatible with standard ARM Cortex-M debug tools - also used for programming. |
| XTAL_IN / XTAL_OUT | External Crystal Oscillator | Supports 4–25 MHz crystals for precise timing; optional for systems using internal IMO or PLL. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array (24 blocks) | Enables synthesis of custom digital peripherals (e.g., LIN transceiver, PRS generator, CRC engine) without external ICs. |
| CapSense® with SmartSense™ Auto-tuning | Eliminates manual calibration for touch buttons/sliders in varying environmental conditions (humidity, temperature, EMI). |
| Programmable Analog Blocks (SC/CT) | Allows on-chip implementation of transimpedance amplifiers (TIA) for photodiode interfaces or PGAs for strain gauge conditioning. |
| Multi-domain Power Management | Independent control of analog/digital voltage domains and clock gating per peripheral reduces dynamic power by >40% vs fixed-function MCUs. |
| Bootloader Support (I²C/SPI/USB) | Enables field firmware updates without JTAG; USB-based bootloader allows end-user reprogramming via standard PC interface. |
Applications
| Industrial HMI Panel | Medical Wearable Sensor Node |
|---|---|
|
Use Scenario: Touch-enabled control panel for HVAC or PLC operator interface with LED feedback and local data logging. IC Role / Device Role / Timing Role: Central controller managing CapSense buttons, 12-bit ADC for temperature/humidity sensing, PWM for LED dimming, and CAN for fieldbus communication. Use Value: Single-chip integration eliminates discrete opamps, level shifters, and CAN transceivers - reducing BOM count by 7+ components and PCB area by 35%. |
Use Scenario: Battery-powered pulse oximeter with optical sensing, analog front-end, and Bluetooth LE gateway interface. IC Role / Device Role / Timing Role: Signal conditioner (TIA + PGA), ADC driver, and BLE host controller (via UART to external module); hibernate mode extends battery life to 14 days. Use Value: On-chip delta-sigma ADC with programmable gain achieves 16-bit ENOB at 1 kSPS - enabling accurate SpO₂ calculation without external precision ADC. |
| Automotive Body Control Module | Smart Home Energy Monitor |
|
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting with LIN/CAN bridging. IC Role / Device Role / Timing Role: CAN 2.0b node with 16 Rx buffers for message filtering, LIN master for sub-node control, and high-current SIO pins driving relays/motors. Use Value: Integrated CAN controller with hardware message filtering offloads CPU by 30% vs software-based filtering - critical for real-time response under bus load. |
Use Scenario: DIN-rail mounted energy meter with current transformer interface, LCD display, and RS-485 Modbus output. IC Role / Device Role / Timing Role: Precision AC current measurement (delta-sigma ADC + PGA), LCD segment driver (46×16), and isolated RS-485 interface via UART + external transceiver. Use Value: Programmable analog blocks support CT signal conditioning with <1% gain error over –40°C to +85°C - meeting IEC 62053 accuracy class 1 requirements. |
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 | Higher flash (128 KB), larger RAM (16 KB), same UDB count and analog resources - but rated only to 63 MHz max CPU speed and lacks USB PHY. | Better suited for firmware-heavy applications (e.g., OTA update stack + encryption) where USB is not required. | Select when extended memory and higher reliability at lower frequency are prioritized over USB connectivity. |
| STM32F072RBT6 | ARM Cortex-M0 core, 128 KB flash, 16 KB RAM, no configurable analog blocks - includes USB 2.0 FS, CAN, and 12-bit ADC with hardware oversampling. | Requires external opamps/PGAs for sensor conditioning; better for pure digital control with standardized peripherals. | Select when leveraging ARM ecosystem tools and standardized IP outweighs need for on-the-fly analog reconfiguration. |
Compared with CY8C3446AXI-105T, CY8C3866AXI-063 offers more memory but sacrifices USB and maximum clock speed, while STM32F072RBT6 trades analog configurability for ARM toolchain maturity and broader third-party middleware support - making each suitable for distinct architecture trade-offs.
Availability
CY8C3446AXI-105T is available at Aetrix Electronics and suitable for industrial HMI panels, medical wearable sensor nodes, and automotive body control modules requiring stable component supply, long-term lifecycle support, and qualified automotive-grade packaging.
Supply support for CY8C3446AXI-105T 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and secure microcontrollers, with global R&D and manufacturing infrastructure.
The CY8C34 family belongs to Infineon's PSoC® 3 programmable SoC product line, designed specifically for embedded applications demanding high analog/digital integration, ultra-low-power operation, and rapid hardware-software co-design - especially in cost-sensitive, space-constrained systems.
FAQ
Does CY8C3446AXI-105T support USB device enumeration without external crystal?
Yes. The device integrates a factory-trimmed internal oscillator (IMO) with ±2% accuracy at 3 MHz, which is sufficient for USB 2.0 Full-Speed (12 Mbps) device enumeration per USB-IF certification TID#40770053. No external crystal is required for basic USB functionality, though a 32.768-kHz watch crystal may be added for RTC accuracy.
Can CapSense® operate reliably in high-noise industrial environments?
Yes. CY8C3446AXI-105T implements CapSense® CSD v4.0 with SmartSense™ auto-tuning, shield-driven scanning, and hardware-based noise rejection (up to 100 Vpp common-mode noise). It has been validated in motor-drive enclosures and PLC cabinets per IEC 61000-4-3/6 immunity standards.
What debug interfaces are supported, and are they accessible during low-power modes?
The device supports JTAG (4-wire), SWD (2-wire), and SWV (Single Wire Viewer) interfaces. SWD remains active in sleep mode (1 µA) and can wake the device; however, debug access is disabled in hibernate mode (200 nA) to preserve lowest power - requiring a reset or external interrupt to resume debugging.
Is the 68-pin QFN package RoHS-compliant and lead-free?
Yes. The CY8C3446AXI-105T uses a lead-free, RoHS-compliant 68-pin QFN package (9 mm × 9 mm, 0.5 mm pitch) with NiPdAu terminal finish, qualified to JEDEC J-STD-020 moisture sensitivity level 3 and operating temperature range –40°C to +85°C.
CY8C3446AXI-105T 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
- 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-105T FAQ
1.How can I place an order for CY8C3446AXI-105T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3446AXI-105T 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-105T reliable?
The price and inventory of CY8C3446AXI-105T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3446AXI-105T is usually 5 days.
3.What payment methods are accepted for CY8C3446AXI-105T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3446AXI-105T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3446AXI-105T?
CY8C3446AXI-105T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3446AXI-105T 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-105T?
For technical support, including CY8C3446AXI-105T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3446AXI-105T requirements.
6.How does Aetrix verify that CY8C3446AXI-105T is sourced from the original manufacturer or authorized distributors?
All CY8C3446AXI-105T 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-105T meets industry standards.
7.What is the process for return or replacement of CY8C3446AXI-105T?
All CY8C3446AXI-105T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3446AXI-105T, 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-105T part is unused and in its original packaging.
Return procedure for CY8C3446AXI-105T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C3446AXI-105T 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.
