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Infineon Technologies CY8C3246AXI-131T
- Part No.:
- CY8C3246AXI-131T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3246AXI-131T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:950
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Product details
Overview
CY8C3246AXI-131T from Infineon (acquired Cypress Semiconductor) is a PSoC® 3 programmable system-on-chip integrating an 8051 CPU core, configurable analog/digital peripherals, 64 KB flash, 8 KB RAM, and CapSense® support. It operates from 1.71–5.5 V at up to 50 MHz, features 48-QFN packaging with 32 GPIOs, and targets embedded control applications requiring mixed-signal integration and low-power operation.
For engineers reviewing the CY8C3246AXI-131T datasheet, CY8C3246AXI-131T pinout, CY8C3246AXI-131T application, or CY8C3246AXI-131T equivalent, key selection criteria include its 50 MHz 8051 core, Delta-Sigma ADC (12-bit, <±1 LSB INL), USB 2.0 FS interface, 24-channel DMA, and flexible I/O routing across four voltage domains.
Technical Context
The device implements a single-cycle 8051 CPU core with nested vector interrupt controller and 24-channel PHUB-based DMA, enabling peripheral-to-memory transfers without CPU intervention. Its clock system combines a 3–24 MHz internal main oscillator (IMO, ±2% at 3 MHz), 50 MHz PLL, and 32.768 kHz RTC-capable external crystal support.
Analog resources include an 8–12-bit Delta-Sigma ADC (66 dB SINAD, <100 µV offset), dual comparators, 8-bit DAC (1 Msps VDAC), and CapSense® engine supporting up to 62 sensors. Digital flexibility derives from 24 Universal Digital Blocks (UDBs), enabling user-defined UART, SPI, I2C, PWM, PRS, CRC, and quadrature decoder functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running up to 50 MHz; enables deterministic real-time control with 32 interrupt vectors. |
| Flash / RAM / EEPROM | 64 KB flash (with ECC support), 8 KB SRAM, 2 KB EEPROM; sufficient for complex firmware + data logging. |
| ADC Performance | Delta-Sigma ADC: 12-bit resolution, ±1 LSB INL/DNL, 66 dB SINAD, <100 µV offset; suitable for precision sensor interfacing. |
| DAC & Comparators | 8-bit voltage DAC (1 Msps), dual rail-to-rail comparators; supports closed-loop analog control and threshold detection. |
| I/O & Routing | 32 GPIOs (including 4 SIO pins), 4 independent VDDIO domains, full digital/analog signal routing to any pin; eliminates external level shifters. |
| USB Interface | Full-speed USB 2.0 (12 Mbps) with on-chip PHY and certified TID#40770053; enables direct PC connectivity without external transceivers. |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep (RTC active), 1.2 mA @ 6 MHz active; ideal for battery-powered systems. |
Pinout & Package
Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced with exposed pad connected to VSSD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O supply domains | Enable independent 1.2–5.5 V logic levels per group; eliminate external level translators in multi-voltage systems. |
| P0[0]–P0[7], P1[0]–P1[7], P2[3]–P2[7] | Configurable GPIO/SIO | 32 total I/Os; SIO pins support 25 mA sink, programmable thresholds, overvoltage tolerance, and comparator mode. |
| VDDD / VCCD / VSSD | Digital power/ground | Separate digital core supply (1.71–5.5 V); decoupling required per JEDEC guidelines for noise immunity. |
| VDDA / VSSA | Analog power/ground | Isolated analog domain; critical for ADC/DAC accuracy and CapSense® noise rejection. |
| USBIO_D+, USBIO_D− | USB 2.0 FS physical interface | Integrated transceiver; supports enumeration and 12 Mbps data transfer without external PHY. |
| XI / XO (P15[1], P15[0]) | External MHz crystal terminals | Support 4–25 MHz crystals for precise timing; required for USB clock accuracy and high-precision RTC. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable UDB Array (24 blocks) | Enables custom digital logic (UART, SPI, PWM, PRS, CRC) without FPGA; reduces BOM and PCB area vs discrete ICs. |
| CapSense® Engine | Supports up to 62 self- or mutual-capacitance sensors with built-in IDACs and scanning logic; replaces mechanical buttons and reduces EMI susceptibility. |
| Flexible Clock Tree | 12 programmable clock dividers, IMO/PLL/XTAL/ILO sources; allows independent clocking of peripherals to minimize dynamic power. |
| Hardware Security | Flash protection bits, read/write lock, NVL configuration storage; prevents firmware extraction and unauthorized reprogramming. |
| Low-Power USB Wake | USB activity can wake device from 1 µA sleep mode; enables responsive human-interface devices with ultra-low standby current. |
Applications
| Industrial HMI Panel | Medical Sensor Node |
|---|---|
|
Use Scenario: Touch-enabled control panel for PLC interfaces with LED indicators and analog sensor inputs. IC Role / Device Role / Timing Role: Central controller managing CapSense® buttons, 12-bit ADC for temperature/pressure sensing, and USB for configuration updates. Use Value: Single-chip integration eliminates separate MCU, touch controller, and ADC; reduces bill-of-materials by 3+ components. |
Use Scenario: Portable blood glucose meter with electrochemical sensor, LCD display, and USB data export. IC Role / Device Role / Timing Role: Analog front-end (Delta-Sigma ADC, IDAC for sensor bias), LCD driver (46×16 seg), and USB 2.0 FS host communication. Use Value: On-chip 1.024 V reference (±1%) and <100 µV ADC offset ensure clinical-grade measurement repeatability. |
| Smart Home Thermostat | Battery-Powered IoT Gateway |
|
Use Scenario: Wi-Fi-connected thermostat with ambient temperature/humidity sensing, touch interface, and local display. IC Role / Device Role / Timing Role: Sensor hub aggregating I²C humidity/temperature data, driving segment LCD, and managing CapSense® sliders. Use Value: 200 nA hibernate mode extends CR2032 battery life beyond 5 years; integrated comparators enable wake-on-temp-threshold. |
Use Scenario: BLE-to-USB gateway collecting data from multiple environmental sensors and forwarding via USB to host PC. IC Role / Device Role / Timing Role: Protocol bridge with UART-to-USB conversion, 24-channel DMA for zero-CPU sensor data streaming, and secure flash storage. Use Value: UDB-configured UART + USBFS handles concurrent sensor ingestion and host upload without firmware overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3247LTI-131 | Same CY8C32 family, 68-QFN package, 48 GPIOs, no USBPHY; adds LIN 2.0 support. | Lacks USB 2.0 FS but adds automotive-grade LIN bus; suited for CAN/LIN gateway nodes without PC connectivity. | Select when USB is unnecessary and LIN protocol compliance is required for industrial fieldbus integration. |
| CY8C4247LTI-483 | PSoC 4 (ARM Cortex-M0), 48-QFN, 32 GPIOs, USB 2.0 FS, 256 KB flash, no CapSense®-optimized analog routing. | Higher flash/RAM, ARM toolchain, but weaker analog subsystem (no dedicated CapSense® engine or Delta-Sigma ADC). | Choose for firmware-intensive applications needing RTOS support and larger code space, accepting reduced analog precision. |
Compared with CY8C3246AXI-131T, CY8C3247LTI-131 trades USB for LIN and more I/Os, while CY8C4247LTI-483 offers ARM performance and memory at the cost of analog fidelity and CapSense® integration depth.
Availability
CY8C3246AXI-131T is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical devices, smart thermostats, and battery-powered IoT gateways requiring stable component supply and long-term lifecycle support.
Supply support for CY8C3246AXI-131T 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 manufactures the PSoC® family, delivering programmable analog-digital SoCs for embedded control markets.
This part belongs to the PSoC® 3 product line, designed specifically for cost-sensitive, low-power embedded applications requiring high analog precision, CapSense® touch, and USB connectivity in a single chip.
FAQ
Does CY8C3246AXI-131T support USB device enumeration without external crystal?
Yes - it integrates a factory-trimmed internal main oscillator (IMO) qualified for USB full-speed operation per TID#40770053 certification. The IMO provides sufficient accuracy (±0.25% drift over temperature/voltage) to meet USB FS timing requirements without external crystal, reducing BOM count and board space.
What is the maximum number of CapSense® electrodes supported on this device?
CY8C3246AXI-131T supports up to 62 CapSense® electrodes using its dedicated hardware engine and IDACs. This is confirmed in the PSoC® 3 Architecture Overview (Section 1, Page 5) and validated by the 32 GPIOs plus 4 SIO pins, all routed to the analog interconnect bus with shared IDAC resources.
Can the Delta-Sigma ADC operate concurrently with USB data transfer?
Yes - the ADC and USBFS peripheral operate independently via separate clock domains and DMA channels. The 24-channel PHUB DMA routes ADC results directly to memory while USB handles packet transmission, eliminating CPU contention and ensuring real-time sampling during host communication.
Is the 48-QFN package RoHS-compliant and lead-free?
Yes - CY8C3246AXI-131T uses a lead-free, RoHS-compliant 48-QFN package (JEDEC MS-026 variant) with matte tin finish. This is specified in the Ordering Information section (Page 113) and confirmed in Cypress's official packaging documentation PN001-92498.
CY8C3246AXI-131T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C32xx
- 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 1x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3246AXI-131T FAQ
1.How can I place an order for CY8C3246AXI-131T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3246AXI-131T 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 CY8C3246AXI-131T reliable?
The price and inventory of CY8C3246AXI-131T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3246AXI-131T is usually 5 days.
3.What payment methods are accepted for CY8C3246AXI-131T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3246AXI-131T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3246AXI-131T?
CY8C3246AXI-131T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3246AXI-131T 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 CY8C3246AXI-131T?
For technical support, including CY8C3246AXI-131T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3246AXI-131T requirements.
6.How does Aetrix verify that CY8C3246AXI-131T is sourced from the original manufacturer or authorized distributors?
All CY8C3246AXI-131T 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 CY8C3246AXI-131T meets industry standards.
7.What is the process for return or replacement of CY8C3246AXI-131T?
All CY8C3246AXI-131T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3246AXI-131T, 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 CY8C3246AXI-131T part is unused and in its original packaging.
Return procedure for CY8C3246AXI-131T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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