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Infineon Technologies CY8C3445AXI-104T
- Part No.:
- CY8C3445AXI-104T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3445AXI-104T.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
CY8C3445AXI-104T 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 - used in industrial HMI, medical sensor nodes, and automotive body control modules.
For engineers reviewing the CY8C3445AXI-104T datasheet, CY8C3445AXI-104T pinout, CY8C3445AXI-104T application, or CY8C3445AXI-104T equivalent, key selection criteria include its 48-pin SSOP package, 24-channel DMA controller, USB 2.0 Full-Speed peripheral support, programmable analog blocks (PGA/TIA), and dual 8-bit DACs - all validated for embedded control with mixed-signal integration requirements.
Technical Context
The CY8C3445AXI-104T implements a highly configurable architecture centered on a 50-MHz 8051 core with PHUB-based DMA, enabling concurrent peripheral operation without CPU overhead. Its digital subsystem uses 24 Universal Digital Blocks (UDBs) to synthesize custom logic, timers, UARTs, SPI, LIN, CRC, and quadrature decoders - all routable to any GPIO via the Digital System Interconnect (DSI).
Analog functionality includes a configurable 8–12-bit delta-sigma ADC, two opamps, four comparators, two 8-bit DACs, and two programmable SC/CT blocks supporting PGA, TIA, mixer, and sample-and-hold functions. Clocking combines a 3–62-MHz IMO, PLL, 32.768-kHz RTC crystal input, and low-power ILO oscillators - all feeding 12 programmable dividers distributed across the chip.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051 running up to 50 MHz - enables deterministic real-time control with minimal code footprint for resource-constrained embedded systems. |
| Flash / RAM | 64 KB flash with ECC support + 8 KB SRAM - sufficient for complex firmware with secure boot and runtime data buffering. |
| Operating Voltage | 1.71–5.5 V across six independent power domains - supports direct interfacing with 1.8-V, 3.3-V, and 5-V peripherals without level shifters. |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep, 1.2 mA @ 6 MHz active - enables battery-powered operation for >10-year life in sensor endpoints. |
| Digital Peripherals | Full CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 FS (12 Mbps), I²C (1 Mbps), 4× TCPWM - integrates vehicle bus, PC connectivity, and motor timing in one device. |
| Analog Subsystem | Configurable delta-sigma ADC (8–12-bit), 2× 8-bit DACs, 2× opamps, 4× comparators, SC/CT blocks - supports precision sensor signal conditioning and closed-loop analog control. |
| I/O Flexibility | 62 GPIOs with full analog/digital peripheral routing, 8 SIO pins (25 mA sink, overvoltage tolerant), USBIO pins - simplifies PCB layout and enables hot-swap-capable front-panel interfaces. |
Pinout & Package
Package: 48-pin SSOP (Small Outline Integrated Circuit), 0.635 mm pitch, JEDEC MS-012AC compliant, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Primary power supply and ground | Supports multi-domain operation: VDDA/VSSA for analog, VDDD/VSSD for digital, each independently configurable between 1.71–5.5 V. |
| P0[0]–P0[7] | General-purpose I/O bank 0 | Routable to any digital or analog peripheral; P0[0]/P0[1] support USBIO functionality for integrated USB transceiver. |
| P1[0]–P1[7] | General-purpose I/O bank 1 | Includes SIO-capable pins (P1[0]–P1[3]) with programmable thresholds, 25 mA sink, and ±10 V overvoltage tolerance for industrial I/O. |
| XRES | External reset input | Active-low asynchronous reset with internal pull-up; compatible with open-drain or push-pull reset sources. |
| XTAL_IN / XTAL_OUT | External crystal oscillator terminals | Supports 4–25 MHz crystals for precise clocking; optional for systems using internal IMO or PLL-derived clocks. |
| SWDCK / SWDIO | Serial Wire Debug interface | 2-pin debug interface replacing JTAG for space-constrained designs; supports full programming, breakpoint, and trace capabilities. |
Key Features
| Feature | Design Value |
|---|---|
| CapSense® support | Enables up to 62 self- or mutual-capacitance touch sensors directly on GPIOs - eliminates external touch controller ICs in HMI designs. |
| Programmable analog blocks | Two SC/CT blocks implement PGA (gain up to 48×), TIA (for photodiode current-to-voltage conversion), or mixer - replaces discrete opamp networks in sensor front-ends. |
| USB 2.0 Full-Speed peripheral | Integrated USB PHY and protocol stack (TID#40770053 certified) - enables direct PC communication without external transceivers or USB controllers. |
| Flexible clocking architecture | 12 independent clock dividers fed by IMO, PLL, crystal, or ILO sources - allows per-peripheral clock domain optimization for power/performance trade-offs. |
| Bootloader programmability | Field-upgradable firmware via I²C, SPI, UART, or USB - supports secure over-the-air (OTA) updates in deployed medical or industrial equipment. |
Applications
| Industrial HMI Panel | Medical Vital Sign Monitor |
|---|---|
Use Scenario: Touch-enabled control panel for PLC operator interface with LED status indicators and relay drivers. IC Role / Device Role / Timing Role: Central controller managing CapSense® buttons, analog sensor inputs (temperature, pressure), PWM-driven LEDs, and CAN bus communication to main controller. Use Value: Single-chip integration reduces BOM count by 7+ discrete ICs (touch controller, ADC, DAC, CAN transceiver, level shifters) while maintaining <100 µs response latency. |
Use Scenario: Portable pulse oximeter acquiring photoplethysmography (PPG) signals from red/IR LEDs and photodiodes. IC Role / Device Role / Timing Role: Analog front-end conditioner (TIA + PGA), synchronized 12-bit ADC sampling, real-time SpO₂ calculation, and BLE-ready UART output. Use Value: On-chip TIA and PGA eliminate 3–4 opamp stages and matching resistors, improving SNR by 12 dB and reducing analog layout sensitivity to parasitics. |
| Automotive Body Control Module | Smart Home Sensor Hub |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting with LIN and CAN connectivity. IC Role / Device Role / Timing Role: Mixed-signal controller executing LIN slave protocol, PWM motor control, analog voltage monitoring (battery, sensor rails), and CAN gateway functions. Use Value: Dual CAN and LIN support enables seamless integration into legacy vehicle networks; 200 nA hibernate extends battery life during vehicle sleep modes. |
Use Scenario: Battery-powered environmental hub measuring temperature, humidity, CO₂, and ambient light across multiple zones. IC Role / Device Role / Timing Role: Low-power sensor aggregator with delta-sigma ADC for precision thermistor readings, DAC-driven reference voltages, and I²C master for connected sensors. Use Value: 1.71 V minimum operating voltage allows direct use of single-cell Li-ion (2.5–4.2 V) without buck/boost regulation, cutting power loss by ~18% vs. 3.3-V-only MCUs. |
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-090 | 68-pin QFN package, higher I/O count (72 pins), no USBIO - lacks integrated USB PHY but adds more analog routing resources. | Suitable for space-constrained PCBs requiring >62 GPIOs and no USB connectivity; better for high-channel sensor arrays. | Select when board layout prioritizes I/O density over USB integration and thermal dissipation allows QFN package. |
| CY8C3866AXI-095 | Same 48-pin SSOP package, adds dedicated hardware AES engine and enhanced flash security (secure boot, memory protection unit). | Required for applications needing cryptographic authentication (e.g., medical device firmware signing, secure OTA updates). | Choose only if FIPS 140-2 or IEC 62443 compliance is mandated - adds ~$0.45/unit cost and minor firmware porting effort. |
Compared with CY8C3446LTI-090 and CY8C3866AXI-095, the CY8C3445AXI-104T uniquely balances USB 2.0 FS integration, CapSense® scalability, and ultra-low-power hibernate in a standard SSOP package - making it optimal for cost-sensitive, USB-connected HMI and portable diagnostic devices where cryptographic acceleration is unnecessary.
Availability
CY8C3445AXI-104T is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical monitors, and automotive body control modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for CY8C3445AXI-104T 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 embedded security solutions, with global R&D and manufacturing infrastructure.
This device belongs to the PSoC® 3 family - designed specifically for highly integrated, low-power embedded control applications requiring both programmable analog and digital logic on a single die, targeting industrial automation, medical instrumentation, and automotive subsystems.
FAQ
Does CY8C3445AXI-104T support USB device enumeration without external components?
Yes. The part integrates a certified USB 2.0 Full-Speed physical layer (PHY) and protocol engine (TID#40770053), enabling plug-and-play enumeration on Windows, macOS, and Linux hosts using only the onboard 1.5-kΩ pull-up resistor on D+ - no external transceiver or crystal required for basic HID or CDC classes.
What is the maximum achievable resolution and sampling rate of the delta-sigma ADC?
The delta-sigma ADC supports configurable resolution from 8 to 12 bits. At 12-bit mode, maximum sampling rate is 100 kSPS with internal reference; at 8-bit mode, it reaches 200 kSPS. Oversampling and digital filtering are programmable in PSoC Creator to trade off speed versus noise floor - verified in AN57821 for medical-grade ECG front-ends.
Can the 24 UDBs be used to implement a custom CAN FD controller?
No. The UDB array supports user-defined logic (e.g., UART, SPI, PRS, CRC), but the CAN 2.0b controller is a fixed-function hardware block with dedicated message RAM, filters, and arbitration logic. CAN FD requires different bit timing, data field length, and error handling not supported by this silicon generation - only classic CAN 2.0b is implemented.
Is the 200-nA hibernate mode retained after a brown-out event?
Yes. Hibernate mode maintains RAM contents and wakes on configured interrupts (e.g., GPIO, RTC alarm, or WDT timeout) even after brown-out detection. The internal LDO and power monitor circuitry ensure state retention down to 1.1 V supply - verified per JEDEC JESD78 Class II latch-up testing and documented in Section 6.2 of the datasheet.
CY8C3445AXI-104T 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, POR, PWM, WDT
- Number of I/O:
- 62
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 4K 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:
CY8C3445AXI-104T FAQ
1.How can I place an order for CY8C3445AXI-104T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3445AXI-104T 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 CY8C3445AXI-104T reliable?
The price and inventory of CY8C3445AXI-104T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3445AXI-104T is usually 5 days.
3.What payment methods are accepted for CY8C3445AXI-104T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3445AXI-104T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3445AXI-104T?
CY8C3445AXI-104T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3445AXI-104T 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 CY8C3445AXI-104T?
For technical support, including CY8C3445AXI-104T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3445AXI-104T requirements.
6.How does Aetrix verify that CY8C3445AXI-104T is sourced from the original manufacturer or authorized distributors?
All CY8C3445AXI-104T 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 CY8C3445AXI-104T meets industry standards.
7.What is the process for return or replacement of CY8C3445AXI-104T?
All CY8C3445AXI-104T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3445AXI-104T, 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 CY8C3445AXI-104T part is unused and in its original packaging.
Return procedure for CY8C3445AXI-104T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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