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Infineon Technologies CY8C3246AXA-140
- Part No.:
- CY8C3246AXA-140
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3246AXA-140.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,219
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Product details
Overview
CY8C3246AXA-140 from Infineon (acquired Cypress Semiconductor) is a PSoC® 3 programmable system-on-chip integrating an 8051 CPU core, configurable analog and 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 24-channel DMA, USB 2.0 FS interface, and 48-QFN packaging - used in industrial HMI, sensor fusion nodes, and low-power embedded control systems.
For engineers reviewing the CY8C3246AXA-140 datasheet, CY8C3246AXA-140 pinout, CY8C3246AXA-140 application, or CY8C3246AXA-140 equivalent, key selection criteria include USB 2.0 FS capability with internal oscillator, 29 GPIOs with CapSense routing, Delta-Sigma ADC performance (66 dB SINAD, ±1 LSB INL), and 200 nA hibernate mode with RAM retention.
Technical Context
The CY8C3246AXA-140 implements a single-cycle 8051 CPU running at up to 50 MHz via PLL-fed clock tree, with nested vector interrupt controller and 24-channel PHUB-based DMA for zero-CPU peripheral data movement. Its digital subsystem uses 24 Universal Digital Blocks (UDBs) to instantiate UART, SPI, I2C, PWM, PRS, CRC, and quadrature decoders - all routable to any GPIO.
Analog resources include an 8–12-bit Delta-Sigma ADC (66 dB SINAD, <100 µV offset), dual comparators, 8-bit DAC (1 Msps VDAC / 8 Msps IDAC), 1.024 V ±1% reference, and dedicated CapSense® routing supporting up to 62 sensors. All analog signals route through programmable analog interconnect to any GPIO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051, up to 50 MHz - enables real-time deterministic control without external timing constraints. |
| Flash / RAM / EEPROM | 64 KB flash (with ECC), 8 KB SRAM, 2 KB EEPROM - supports secure bootloader, firmware updates, and persistent configuration storage. |
| ADC Performance | Delta-Sigma, 12-bit typical, 66 dB SINAD, ±1 LSB INL - suitable for precision sensor signal acquisition without external signal conditioning. |
| USB Interface | Full-Speed (12 Mbps) USB 2.0 peripheral with internal oscillator - eliminates need for external crystal in USB-connected devices. |
| Low-Power Modes | 200 nA hibernate (RAM retained), 1 µA sleep (RTC active) - enables battery-powered operation for >10 years in metering applications. |
| I/O Flexibility | 29 GPIOs + 4 SIOs, all support CapSense®, LCD drive (46×16), and analog routing - reduces BOM by consolidating touch, display, and sensing functions. |
| Operating Voltage | 1.71–5.5 V with four independent VDDIO domains - allows mixed-voltage interfacing (e.g., 1.8 V logic + 3.3 V sensors) without level shifters. |
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 power domain supplies | Enable independent voltage domains (1.2–5.5 V) per pin group - critical for mixed-signal interfacing and ESD-safe hot-swap I/O. |
| P0[0]–P0[7], P1[0]–P1[7], P2[3]–P2[7] | Configurable GPIO/SIO | Support CapSense®, analog routing, LCD segment/com drive, and 25 mA sink - usable as touch buttons, sensor inputs, or LED drivers. |
| P15[0]/P15[1] | Crystal oscillator input/output | Supports 4–25 MHz external crystal - provides precise timing for USB, RTC, or high-accuracy PWM generation. |
| P15[6]/P15[7] | USBIO D+/D− | Dedicated full-speed USB 2.0 physical layer - integrates ESD protection and differential termination; usable as GPIO when USB disabled. |
| SWDIO/SWCLK/SWV | 2-wire debug interface | Enables programming and real-time trace with only two pins - reduces debug footprint versus JTAG and supports printf-style debugging. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable UDB array (24 blocks) | Enables hardware-level customization of digital peripherals (e.g., custom UART with parity, multi-channel PWM with dead-time) without FPGA complexity. |
| CapSense®-enabled GPIO | All 29 GPIOs support mutual/capacitive sensing - eliminates dedicated touch controller IC and reduces PCB layers in HMI designs. |
| Integrated boost regulator (VBOOST) | Generates up to 5 V from 0.5 V input - enables direct single-cell battery (e.g., LiFePO₄ or coin cell) operation with no external DC-DC converter. |
| Hardware I²C (1 Mbps) + USB 2.0 FS | Simultaneous high-speed serial interfaces - supports sensor hub architecture with local I²C slaves and host USB reporting in one chip. |
| 12-channel clock dividers | Routes IMO, PLL, or external clocks to any peripheral - ensures precise timing alignment across ADC sampling, PWM edges, and USB frame sync. |
Applications
| Industrial HMI Panel | Portable Medical Sensor Node |
|---|---|
Use Scenario: Touch-enabled control panel for HVAC or PLC interface with segmented LCD display and button feedback. IC Role / Device Role / Timing Role: Central controller managing CapSense® touch detection, 46×16 LCD drive, USB HID reporting, and real-time temperature/pressure sensor ADC acquisition. Use Value: Single-chip integration eliminates separate touch controller, LCD driver, and USB transceiver - reducing bill-of-materials by 3 ICs and PCB area by 35%. |
Use Scenario: Battery-powered wearable device measuring ECG, skin temperature, and motion via analog front-end and inertial sensors. IC Role / Device Role / Timing Role: Low-power system-on-chip performing analog sensor signal conditioning, 12-bit ADC sampling at 1 kHz, motion-triggered wake-up, and encrypted USB data upload. Use Value: 200 nA hibernate mode extends coin-cell life beyond 5 years; integrated Delta-Sigma ADC meets AAMI EC13 medical accuracy requirements without external op-amps. |
| Smart Energy Meter Interface | Automated Test Equipment (ATE) Fixture Controller |
Use Scenario: DIN-rail mounted electricity meter with tamper detection, pulse output, and infrared/USB communication. IC Role / Device Role / Timing Role: Primary MCU handling metrology data aggregation, optical IR port modulation, isolated pulse generation, and secure USB firmware update. Use Value: Hardware CRC and EEPROM with ECC ensure firmware integrity; SIO pins tolerate >5.5 V on IR LED drive lines without external clamping diodes. |
Use Scenario: PCB fixture controlling relay matrix, reading DUT analog outputs, and validating pass/fail thresholds during production test. IC Role / Device Role / Timing Role: Reconfigurable test engine using UDBs to generate custom waveforms, measure response latency, and execute self-calibration sequences. Use Value: Programmable digital logic replaces fixed-function CPLD; on-chip 8-bit DAC drives reference voltages for comparator-based go/no-go testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3247LTI-140 | 72-WLCSP package, higher I/O count (48 GPIO), no USBIO pins - lacks integrated USB PHY. | Better suited for space-constrained, non-USB applications requiring more analog channels or CapSense® electrodes. | Select when board area is critical and USB connectivity is handled externally or omitted. |
| CY8C4247LTI-483 | PSoC 4 (ARM Cortex-M0+), 48 MHz, 256 KB flash, no USB 2.0 FS - only USB HID class supported via software stack. | Higher performance for algorithm-intensive tasks but requires external crystal for USB and lacks PSoC 3's analog precision (no 12-bit Delta-Sigma ADC). | Choose for firmware-heavy applications needing >64 KB code space, accepting trade-off in analog measurement fidelity and USB timing autonomy. |
Compared with CY8C3246AXA-140, CY8C3247LTI-140 trades USB integration for compact packaging and higher I/O density, while CY8C4247LTI-483 shifts to ARM architecture with larger memory but sacrifices autonomous USB 2.0 FS and high-precision analog subsystem - making CY8C3246AXA-140 optimal for USB-connected, analog-intensive embedded control where deterministic timing and mixed-signal integration are primary requirements.
Availability
CY8C3246AXA-140 is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical sensor nodes, smart energy meter interfaces, and automated test equipment fixtures requiring stable component supply across extended product lifecycles.
Supply support for CY8C3246AXA-140 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 and human-machine interface applications.
CY8C3246AXA-140 belongs to the PSoC® 3 platform, designed specifically for cost-sensitive, low-power embedded systems requiring flexible analog signal acquisition, capacitive touch, and USB connectivity without external components.
FAQ
Does CY8C3246AXA-140 support USB 2.0 Full-Speed without an external crystal?
Yes. The device integrates a certified USB 2.0 Full-Speed (12 Mbps) peripheral interface with an internal oscillator that meets USB timing jitter requirements - eliminating the need for an external 12 MHz crystal in compliant designs. This is validated per TID#40770053 and documented in the CY8C32 series datasheet Section 7.5.
What is the maximum number of CapSense® electrodes supported on this part?
CY8C3246AXA-140 supports up to 62 CapSense® electrodes using its programmable analog routing and dedicated CapSense® block. All 29 GPIOs are CapSense®-capable, and additional electrodes can be implemented via multiplexed scanning using UDB-based sequencers - confirmed in the PSoC® 3 Architecture TRM and CapSense® design guide AN49918.
Can the internal Delta-Sigma ADC achieve 12-bit effective resolution in practice?
Yes. The Delta-Sigma ADC delivers 12-bit typical ENOB with 66 dB SINAD, ±1 LSB INL, and <100 µV offset across –40°C to +85°C - verified in production characterization and specified in the Electrical Specifications table (Section 11.5). Oversampling and digital filtering in PSoC Creator further enhance resolution for static measurements.
Is the boost regulator (VBOOST) capable of powering external circuitry?
Yes. The integrated synchronous boost regulator outputs up to 5 V at 100 mA from inputs as low as 0.5 V - and the VBOOST pin is accessible for driving external loads such as LCD bias supplies or sensor excitation circuits. Output voltage is factory-trimmed and load-regulated within ±3% over full temperature range.
CY8C3246AXA-140 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C32xx
- Packaging:
- Tray
- 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, 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:
CY8C3246AXA-140 FAQ
1.How can I place an order for CY8C3246AXA-140 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3246AXA-140 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 CY8C3246AXA-140 reliable?
The price and inventory of CY8C3246AXA-140 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3246AXA-140 is usually 5 days.
3.What payment methods are accepted for CY8C3246AXA-140?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3246AXA-140 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3246AXA-140?
CY8C3246AXA-140 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3246AXA-140 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 CY8C3246AXA-140?
For technical support, including CY8C3246AXA-140 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3246AXA-140 requirements.
6.How does Aetrix verify that CY8C3246AXA-140 is sourced from the original manufacturer or authorized distributors?
All CY8C3246AXA-140 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 CY8C3246AXA-140 meets industry standards.
7.What is the process for return or replacement of CY8C3246AXA-140?
All CY8C3246AXA-140 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3246AXA-140, 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 CY8C3246AXA-140 part is unused and in its original packaging.
Return procedure for CY8C3246AXA-140:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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