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Infineon Technologies CY8C3445AXA-181
- Part No.:
- CY8C3445AXA-181
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3445AXA-181.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,811
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Product details
Overview
CY8C3445AXA-181 from Infineon Technologies (acquired Cypress Semiconductor) is an AEC-Q100 qualified automotive-grade PSoC® 3 programmable system-on-chip integrating an 8051 CPU core, 64 KB flash, 8 KB SRAM, 2 KB EEPROM, 24-channel DMA, 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 V to 5.5 V across –40 °C to +125 °C and supports CapSense®, LCD direct drive, and delta-sigma ADC with 12-bit resolution at 192 ksps.
For engineers reviewing the CY8C3445AXA-181 datasheet, CY8C3445AXA-181 pinout, CY8C3445AXA-181 application, or CY8C3445AXA-181 equivalent, this device serves as a single-chip solution for automotive body control modules, sensor fusion nodes, and infotainment subsystems requiring mixed-signal configurability, functional safety readiness, and field-upgradable firmware.
Technical Context
The CY8C3445AXA-181 implements a single-cycle 8051 CPU core running up to 50 MHz with integrated flash cache, ECC-protected configuration storage, and hardware debug support via SWD/JTAG. Its digital subsystem uses 24 Universal Digital Blocks (UDBs) with DSI routing to enable custom logic, UART/I²C/SPI/LIN/CAN/USB peripherals, and quadrature decoding-all reconfigurable in firmware.
Analog resources include a 12-bit delta-sigma ADC (192 ksps, 66 dB SINAD), four comparators (95 ns response), two opamps (25 mA drive), dual DACs (8-bit IDAC/VDAC), and programmable SC/CT blocks for PGA/TIA/mixer configurations-all accessible from any of 62 GPIOs with per-pin voltage domain control (1.2–5.5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051, DC to 50 MHz operation with multiply/divide instructions and 512-byte flash cache |
| Memory | 64 KB flash (100k write cycles, 20-yr retention), 8 KB SRAM, 2 KB EEPROM (1M cycles) |
| Analog ADC | Configurable delta-sigma ADC: 8–12-bit resolution, 192 ksps max sample rate, ±1 LSB INL/DNL |
| Digital Interfaces | Full CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 FS (12 Mbps, TID#40770053 certified), I²C multimaster |
| Operating Range | –40 °C to +125 °C ambient, 1.71 V to 5.5 V supply, AEC-Q100 Grade 0 qualified |
| I/O System | 62 GPIOs + 8 SIO + 2 USBIO; all routable to analog/digital peripherals; CapSense® and LCD 46×16 support |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep (RTC + LVD interrupt), 6.6 mA active @ 50 MHz |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA, VDDD | Analog/Digital Power Supply | Separate 1.71–5.5 V domains; VDDA powers ADC, DAC, opamps, and reference; decoupling required per datasheet Section 11.3 |
| P0[0]–P0[7], P1[0]–P1[7], etc. | Configurable GPIO | All 62 GPIOs support analog input/output routing, CapSense®, LCD segment/common, Schmitt-trigger input, and programmable drive strength |
| CAN_TX, CAN_RX | CAN Bus Interface | Dedicated differential pair supporting CAN 2.0b protocol; internal termination and filtering enabled via UDB configuration |
| USBDP, USBDM | USB 2.0 Full-Speed PHY | On-die transceiver compliant with USB 2.0 FS; requires no external crystal due to internal oscillator calibration |
| XRES | External Reset Input | Active-low asynchronous reset; internally pulled up; compatible with automotive watchdog timer outputs |
| SWDCK, SWDIO | Serial Wire Debug | 2-wire JTAG alternative for programming and real-time trace; supports 4 KB instruction trace buffer and 8 breakpoints |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Subsystem | Delta-sigma ADC with programmable gain (×0.25–×16), 2 opamps (25 mA output), and SC/CT blocks for PGA/TIA/mixer-enables sensor front-end customization without external components |
| Field-Upgradeable Peripherals | UDB array and DSI routing allow runtime reconfiguration of digital functions (e.g., switching UART to SPI or adding PRS generator) via firmware update-no PCB change required |
| AEC-Q100 Automotive Compliance | Qualified to Grade 0 (–40 °C to +125 °C), including HTOL, TC, ESD, and latch-up testing-validates reliability for under-hood and dashboard applications |
| Integrated Security Resources | Flash security bits, nonvolatile latches (NVLs), and protected bootloader memory prevent unauthorized firmware access or cloning-supports secure boot and OTA updates |
Applications
| Automotive Body Control Module | Smart Sensor Fusion Node |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, mirror adjustment, and interior lighting in modern vehicles. IC Role / Device Role / Timing Role: Primary MCU executing real-time CAN message handling, PWM motor control, and CapSense® touch detection on shared GPIOs. Use Value: Integrates CAN, USB, and analog sensing into one die-reducing BOM count by 3+ discrete ICs and enabling firmware-based feature tuning post-production. |
Use Scenario: Aggregating temperature, pressure, and humidity data from multiple automotive sensors for HVAC or battery management systems. IC Role / Device Role / Timing Role: Delta-sigma ADC acquires synchronized multi-channel analog inputs; UDBs implement CRC and PRS for data integrity and dithering. Use Value: 12-bit ADC with 66 dB SINAD ensures <±0.5°C thermal accuracy; configurable SC/CT blocks eliminate need for external signal conditioning amplifiers. |
| Infotainment Display Controller | LED Lighting Driver Subsystem |
Use Scenario: Driving segmented LCD displays (e.g., instrument clusters or center consoles) while managing touch input and audio feedback. IC Role / Device Role / Timing Role: LCD direct drive (46×16 segments) combined with CapSense® buttons and I²C-connected audio codec interface. Use Value: Eliminates dedicated LCD driver and touch controller ICs; GPIO voltage-domain flexibility allows direct interface to 3.3 V display and 5 V backlight circuits. |
Use Scenario: Closed-loop current regulation for adaptive LED headlamps with thermal derating and fault reporting over CAN. IC Role / Device Role / Timing Role: 8-bit IDACs deliver precise current to LED strings; comparators monitor thermal sensors; CAN handles diagnostics and dimming commands. Use Value: On-chip IDACs (8 Msps) enable high-frequency PWM dimming without external DACs; opamp outputs drive external MOSFET gates directly. |
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 |
|---|---|---|---|
| NXP S32K144 | ARM Cortex-M4F core, 160 MHz, 1 MB flash, CAN FD support, no integrated delta-sigma ADC or CapSense® | Better for high-speed CAN FD networks and complex motor control; lacks on-die analog front-end for low-cost sensor nodes | Select when CAN FD bandwidth > 1 Mbps or floating-point math is required; avoid if analog integration and rapid prototyping are priorities |
| Renesas RL78/F14 | 16-bit RL78 core, 32 MHz, 512 KB flash, 10-bit SAR ADC, no USB or configurable logic array | Lower power in deep sleep (<0.5 µA), suited for simple body electronics; no USB or reconfigurable digital blocks | Select for ultra-low-power entry-level modules where USB connectivity and firmware-defined peripherals are unnecessary |
Compared with NXP S32K144 and Renesas RL78/F14, the CY8C3445AXA-181 uniquely combines automotive-grade analog precision (12-bit delta-sigma ADC), field-reconfigurable digital logic (UDBs), and USB/CAN coexistence in one die-making it optimal for cost-sensitive, mixed-signal automotive subsystems requiring design flexibility and rapid iteration.
Availability
CY8C3445AXA-181 is available at Aetrix Electronics and suitable for automotive body control modules, smart sensor fusion nodes, infotainment display controllers, and LED lighting driver subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY8C3445AXA-181 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 the PSoC® portfolio. Infineon is a global semiconductor leader focused on power systems, automotive electronics, and IoT infrastructure.
The CY8C34 family belongs to Infineon's automotive-qualified PSoC® 3 platform, designed specifically for mixed-signal integration in body electronics, chassis systems, and cabin control units where analog precision, digital flexibility, and functional safety compliance are critical.
FAQ
Does CY8C3445AXA-181 support CAN FD?
No. The CY8C3445AXA-181 implements only classical CAN 2.0b (up to 1 Mbps) with 16 Rx and 8 Tx buffers. It does not support CAN FD features such as flexible data-rate, larger payloads, or enhanced error detection. For CAN FD, consider Infineon's AURIX™ or Traveo™ II families.
Can the internal USB PHY operate without an external crystal?
Yes. The CY8C3445AXA-181's USB 2.0 Full-Speed PHY uses an internally calibrated oscillator meeting USB specification timing requirements, eliminating the need for an external 12 MHz crystal. This reduces BOM cost and board space while maintaining TID#40770053 certification.
What is the maximum clock frequency achievable with the internal PLL?
The internal PLL generates clocks up to 50 MHz from internal or external sources. When driven by the 3–62 MHz IMO (Internal Main Oscillator), the PLL achieves stable 50 MHz output across –40 °C to +125 °C and 1.71–5.5 V supply range-verified per datasheet Section 11.9.
Is CapSense® supported on all GPIO pins?
CapSense® is supported on all 62 GPIO pins, but GPIOs connected to opamp outputs are explicitly excluded per datasheet Note 3. Sensing accuracy depends on layout, shielding, and firmware tuning-reference AN76195 and PSoC Creator CapSense® Component datasheet for implementation guidance.
CY8C3445AXA-181 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C34xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 50MHz
- Connectivity:
- CANbus, 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:
CY8C3445AXA-181 FAQ
1.How can I place an order for CY8C3445AXA-181 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3445AXA-181 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 CY8C3445AXA-181 reliable?
The price and inventory of CY8C3445AXA-181 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3445AXA-181 is usually 5 days.
3.What payment methods are accepted for CY8C3445AXA-181?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3445AXA-181 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3445AXA-181?
CY8C3445AXA-181 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3445AXA-181 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 CY8C3445AXA-181?
For technical support, including CY8C3445AXA-181 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3445AXA-181 requirements.
6.How does Aetrix verify that CY8C3445AXA-181 is sourced from the original manufacturer or authorized distributors?
All CY8C3445AXA-181 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 CY8C3445AXA-181 meets industry standards.
7.What is the process for return or replacement of CY8C3445AXA-181?
All CY8C3445AXA-181 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3445AXA-181, 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 CY8C3445AXA-181 part is unused and in its original packaging.
Return procedure for CY8C3445AXA-181:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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