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Infineon Technologies CY8C3246AXA-137
- Part No.:
- CY8C3246AXA-137
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3246AXA-137.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,238
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Product details
Overview
CY8C3246AXA-137 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 24-channel DMA, USB 2.0 FS interface, and 48-QFN packaging-enabling compact, low-power embedded control in touch-enabled industrial HMI systems.
For engineers reviewing the CY8C3246AXA-137 datasheet, CY8C3246AXA-137 pinout, CY8C3246AXA-137 application, or CY8C3246AXA-137 equivalent, key selection criteria include USBIO routing capability, 62-capacitive-sensor CapSense® scalability, 200 nA hibernate mode with RAM retention, and UDB-based reconfigurable digital logic for protocol adaptation without hardware change.
Technical Context
The device implements a single-cycle 8051 CPU core with nested vector interrupt controller and PHUB-based 24-channel DMA, enabling zero-CPU-overhead peripheral data movement. Its clock tree integrates a 3–24 MHz IMO (±2% at 3 MHz), 50 MHz PLL, and ILO (1/33/100 kHz) for precise timing across active, sleep, and hibernate modes.
Analog subsystem includes an 8–12-bit Delta-Sigma ADC (INL < ±1 LSB, SINAD > 66 dB), dual comparators, 8-bit DAC (1 Msps VDAC / 8 Msps IDAC), and 1.024 V ±1% reference-fully routable to any GPIO via programmable analog interconnect.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running up to 50 MHz; enables deterministic real-time control with <1 µs interrupt latency. |
| Flash / RAM / EEPROM | 64 KB flash (with ECC support), 8 KB SRAM, 2 KB EEPROM; sufficient for bootloader + application + field-upgradable firmware storage. |
| Operating Voltage | 1.71–5.5 V supply range with four independent VDDIO domains; allows mixed-voltage I/O interfacing without external level shifters. |
| Power Modes | 200 nA hibernate (RAM retained), 1 µA sleep (RTC active), 1.2 mA @ 6 MHz active; supports battery-powered operation >10 years on coin cell. |
| USB Interface | Full-speed USB 2.0 (12 Mbps) with integrated PHY and internal oscillator; eliminates need for external crystal or transceiver in HID/class-compliant designs. |
| CapSense® Channels | Up to 62 self- or mutual-capacitance sensors; enables robust, noise-immune touch buttons, sliders, and proximity detection in harsh EMI environments. |
| Digital Peripherals | 4× 16-bit TCPWM, 1× hardware I²C (1 Mbps), 24 UDBs for custom logic (UART/SPI/LIN/CRC/PRS); replaces multiple discrete ICs with one reprogrammable fabric. |
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 |
|---|---|---|
| P15[6]/P15[7] | USBIO D+/D− | Dedicated full-speed USB physical layer pins; support SWD debug when USB not active-reduces pin count for dual-mode programming. |
| VDDIO0–VDDIO3 | I/O Power Domains | Four independent voltage rails (1.2–5.5 V); enable simultaneous 1.8 V sensor interface, 3.3 V display bus, and 5 V actuator drive on same die. |
| P0[6] | IDAC0 Output | 8 Msps current DAC output; directly drives capacitive sense electrodes or precision current sources without external op-amps. |
| P12[0]/P12[1] | I²C1 SCL/SDA | Hardware-accelerated I²C master/slave interface; supports multi-master arbitration and clock stretching for sensor hub applications. |
| VBOOST | Boost Regulator Output | Programmable 0.5–5.0 V boost output; powers external LCD bias or extends battery life by enabling single-cell (0.5 V min) operation. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array (24 units) | Enables creation of custom digital peripherals (e.g., SPI+LIN hybrid, CRC-augmented UART) without FPGA-level complexity or cost. |
| Programmable Analog Interconnect | Routes ADC inputs, DAC outputs, comparator references, and CapSense signals to any GPIO-eliminates fixed-function pin constraints. |
| CapSense® with SmartSense™ Auto-Tuning | Self-calibrating touch sensing requiring zero manual tuning; maintains stable button response across temperature/humidity/voltage drift. |
| Integrated Boost Converter | Starts from 0.5 V input; powers entire SoC and external peripherals from single alkaline or NiMH cell-no external DC-DC needed. |
| SWD + SWV Debug Interface | 3-pin debug (SWDIO/SWDCK/SWV) with printf-style trace; enables real-time variable monitoring and non-intrusive code profiling in production firmware. |
Applications
| Industrial HMI Panels | Medical Patient Monitors |
|---|---|
|
Use Scenario: Touch-enabled front-panel interface for PLC controllers with LED status indicators and rotary encoder emulation. IC Role / Device Role / Timing Role: Central system controller managing CapSense® touch overlay, segment LCD driver, USB HID communication, and analog sensor acquisition. Use Value: Single-chip integration reduces BOM count by 7+ components (touch controller, USB transceiver, LCD driver, ADC, DAC, boost converter) while supporting field firmware updates over USB. |
Use Scenario: Portable vital-signs monitor acquiring ECG, SpO₂, and temperature with capacitive touch controls and battery-backed data logging. IC Role / Device Role / Timing Role: Low-power system-on-chip handling analog front-end signal conditioning, CapSense® user interface, USB mass-storage data export, and 200 nA hibernate mode between measurements. Use Value: 200 nA hibernate with RAM retention preserves calibration state and patient session context across weeks of standby-enabling instant wake without recalibration. |
| Smart Home Thermostats | Automotive Cabin Controls |
|
Use Scenario: Wall-mounted HVAC controller with glass-touch surface, ambient light sensing, and Zigbee/Bluetooth coexistence via UART-to-module bridge. IC Role / Device Role / Timing Role: Reconfigurable digital subsystem implements UART-to-Zigbee protocol translation while analog subsystem conditions photodiode input and drives piezo buzzer feedback. Use Value: UDB-based UART bridging avoids dedicated protocol translator IC; CapSense® immunity to moisture/grease ensures reliable operation in kitchen/bathroom environments. |
Use Scenario: Center-stack infotainment control panel with haptic feedback, ambient temperature compensation, and CAN message filtering via software-defined logic. IC Role / Device Role / Timing Role: Configurable digital logic implements CAN message parsing and filtering; analog subsystem acquires cabin temp and drives haptic actuator via PWM DAC. Use Value: UDB-based CAN filtering offloads MCU, reducing CPU load by ~15% during peak bus traffic-preserving cycles for audio processing and UI rendering. |
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 |
|---|---|---|---|
| CY8C3247LTI-139 | 72-WLCSP package (3.2 mm × 3.2 mm), higher I/O count (62 GPIO), no USBIO; identical core/peripherals. | Better suited for space-constrained portable devices where USB is unnecessary but ultra-low profile is critical. | Select when board area < 10 mm² and USB connectivity is handled externally or omitted. |
| CY8C4247LTI-489 | PSoC 4 (ARM Cortex-M0+) with 256 KB flash, 32 KB RAM, no USB 2.0 FS; adds BLE radio and higher analog performance. | Preferred for Bluetooth-connected IoT endpoints requiring wireless telemetry and larger firmware footprint. | Select when BLE wireless connectivity, larger memory, or lower active power (150 µA/MHz) outweighs need for USB 2.0 FS and 8051 toolchain continuity. |
Compared with CY8C3246AXA-137, CY8C3247LTI-139 trades USB and QFN thermal performance for extreme miniaturization, while CY8C4247LTI-489 shifts to ARM architecture with BLE and higher memory-but loses native USB 2.0 FS and 8051 ecosystem compatibility.
Availability
CY8C3246AXA-137 is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical monitors, smart home thermostats, and automotive cabin controls requiring stable component supply across extended product lifecycles.
Supply support for CY8C3246AXA-137 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, inheriting its PSoC® portfolio-a family of programmable mixed-signal SoCs targeting embedded control with analog/digital flexibility.
CY8C3246AXA-137 belongs to the PSoC® 3 platform, designed specifically for cost-sensitive, low-power embedded applications requiring high analog precision, capacitive touch, and USB connectivity without external components.
FAQ
Does CY8C3246AXA-137 support USB device enumeration without an external crystal?
Yes. The part integrates a factory-trimmed internal oscillator qualified for USB Full-Speed (12 Mbps) operation per TID#40770053 certification. No external 12 MHz crystal is required-reducing BOM count and PCB layout complexity while maintaining USB compliance.
What is the maximum number of CapSense® electrodes supported on this device?
CY8C3246AXA-137 supports up to 62 capacitive sensing electrodes using self-capacitance or mutual-capacitance methods. This is enabled by dedicated analog routing resources and SmartSense™ auto-tuning firmware, eliminating manual calibration across production units.
Can the boost converter output (VBOOST) power external circuitry?
Yes. VBOOST delivers up to 100 mA at programmable voltages from 0.5 V to 5.0 V. It can directly power external LCD bias circuits, op-amps, or sensors-enabling true single-cell (e.g., AA/AAA) operation without discrete DC-DC converters.
Is SWD debugging available on the 48-QFN package, and which pins are used?
Yes. SWD debugging uses P15[6] (SWDIO) and P15[7] (SWDCK) - the same pins as USB D+ and D−. When USB is inactive, these pins default to SWD mode, allowing full debug access with only two dedicated pins plus SWV on P1[3] for trace output.
CY8C3246AXA-137 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
- 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-137 FAQ
1.How can I place an order for CY8C3246AXA-137 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3246AXA-137 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-137 reliable?
The price and inventory of CY8C3246AXA-137 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3246AXA-137 is usually 5 days.
3.What payment methods are accepted for CY8C3246AXA-137?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3246AXA-137 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3246AXA-137?
CY8C3246AXA-137 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3246AXA-137 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-137?
For technical support, including CY8C3246AXA-137 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3246AXA-137 requirements.
6.How does Aetrix verify that CY8C3246AXA-137 is sourced from the original manufacturer or authorized distributors?
All CY8C3246AXA-137 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-137 meets industry standards.
7.What is the process for return or replacement of CY8C3246AXA-137?
All CY8C3246AXA-137 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3246AXA-137, 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-137 part is unused and in its original packaging.
Return procedure for CY8C3246AXA-137:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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