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Infineon Technologies CY8C3246LTI-128T
- Part No.:
- CY8C3246LTI-128T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 68-VFQFN Exposed Pad
- Datasheet:
-
CY8C3246LTI-128T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 68QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,169
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Product details
Overview
CY8C3246LTI-128T from Infineon Technologies (acquired Cypress Semiconductor) is a programmable 8-bit PSoC® 3 system-on-chip integrating an enhanced 8051 CPU, 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 62-capacitive-touch-sensor capability - deployed in industrial HMI, medical sensor hubs, and battery-powered IoT edge nodes.
For engineers reviewing the CY8C3246LTI-128T datasheet, CY8C3246LTI-128T pinout, CY8C3246LTI-128T application, or CY8C3246LTI-128T equivalent, key selection criteria include its mixed-signal configurability, USBIO routing flexibility, 200 nA hibernate mode with RAM retention, and UDB-based peripheral synthesis for UART/SPI/I2C/LIN without external ICs.
Technical Context
The device implements a single-cycle 8051 core with nested vector interrupt controller and PHUB-based 24-channel DMA, enabling zero-CPU-overhead peripheral data transfers. Its clock tree integrates a 3–24 MHz IMO (±2% at 3 MHz), 50 MHz PLL, and dual-speed ILO (1/33/100 kHz) for precise timing control 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% internal reference - all 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 - delivers 10× throughput vs standard 8051 for real-time firmware execution. |
| Flash / RAM / EEPROM | 64 KB flash (with ECC support), 8 KB SRAM, 2 KB EEPROM - enables secure bootloader, field-upgradable firmware, and nonvolatile parameter storage. |
| Analog-to-Digital Converter | Configurable 8–12-bit Delta-Sigma ADC with <100 µV offset, 0.2% gain error - suitable for precision sensor signal conditioning without external calibration. |
| Digital Peripherals | 4 × 16-bit TCPWM, hardware I²C (1 Mbps), full-speed USB 2.0 (12 Mbps), and 24 UDBs - synthesizes UART, SPI, LIN, PRS, CRC, and quadrature decoders in firmware-defined logic. |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep (RTC active), 1.2 mA @ 6 MHz active - extends battery life in portable and energy-harvesting applications. |
| I/O Flexibility | 62 GPIO with CapSense®, LCD drive (46×16), analog muxing, and SIO pins (25 mA sink, overvoltage-tolerant) - eliminates level shifters and reduces BOM count. |
| USB Interface | Integrated USB 2.0 FS PHY with internal oscillator (TID#40770053 certified) - enables HID, CDC, and MSC class devices without external crystal or transceiver. |
Pinout & Package
Package: 128-pin TQFP (14 mm × 14 mm, 0.4 mm pitch), RoHS-compliant, with exposed thermal pad connected to VSSD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O voltage domain supplies | Enable independent 1.2–5.5 V interface levels per pin group - supports mixed-voltage communication without external level translators. |
| P0[0]–P2[7], P12[0–3], P15[0–7] | Configurable GPIO/SIO/USBIO | All pins support digital, analog, CapSense®, and LCD segment/com drive - routed dynamically via DSI and analog interconnect. |
| VDDD / VCCD / VSSD | Digital power/ground | Separate digital supply (1.71–5.5 V) and ground planes reduce noise coupling into analog subsystem. |
| VDDA / VSSA / VCCA | Analog power/ground/reference | Dedicated analog supply and ground pins isolate sensitive ADC/DAC operation from digital switching noise. |
| VBOOST | Boost regulator output | Provides regulated 3.3 V or 5.0 V from input as low as 0.5 V - powers external displays or sensors directly from single-cell battery. |
| XTAL_IN / XTAL_OUT | External crystal interface | Supports 4–25 MHz crystals for high-accuracy timing; optional 32.768 kHz RTC crystal input on dedicated pins. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable UDB Array (24 units) | Enables user-defined digital logic (e.g., custom UART, SPI, PRS, CRC) without fixed-function silicon constraints - accelerates prototyping and avoids ASIC development. |
| CapSense® with Smart Sense™ | Supports up to 62 self- and mutual-capacitance sensors with automatic tuning and noise immunity - replaces mechanical buttons in harsh environments. |
| Integrated USB 2.0 FS PHY | Eliminates need for external USB transceiver and crystal - reduces PCB area by >25 mm² and simplifies EMI compliance testing. |
| Configurable Analog Subsystem | ADC, DAC, comparators, and reference share common routing - allows closed-loop sensor processing (e.g., temp-compensated pressure sensing) entirely on-chip. |
| Multi-Voltage I/O Domains | Four independent VDDIO rails allow simultaneous 1.8 V, 3.3 V, and 5 V interfaces - interoperates with legacy peripherals and modern low-power sensors in same design. |
Applications
| Industrial HMI Panel | Portable Medical Sensor Hub |
|---|---|
Use Scenario: Touch-enabled control panel for PLC operator interface with LED status indicators and serial diagnostics. IC Role / Device Role / Timing Role: Central PSoC manages CapSense® buttons, drives 4×16 segment LCD, routes UART to RS-485 transceiver, and executes real-time alarm logic using TCPWM timers. Use Value: Single-chip integration reduces component count by 12+ discrete ICs (touch controller, LCD driver, UART buffer, LED drivers) while supporting firmware updates over USB. | Use Scenario: Battery-powered wearable device aggregating ECG, temperature, and motion data for Bluetooth LE transmission. IC Role / Device Role / Timing Role: PSoC acquires analog ECG via Delta-Sigma ADC, conditions signal with programmable gain amplifier (UDB-based), timestamps samples using RTC, and formats data for BLE MCU via SPI. Use Value: 200 nA hibernate mode extends coin-cell life to >2 years; integrated reference and ADC linearity eliminate external calibration components. |
| Energy-Harvesting Wireless Node | Automotive Body Control Module |
Use Scenario: Solar- or vibration-powered sensor node monitoring door/window status and ambient light in smart building systems. IC Role / Device Role / Timing Role: CY8C3246LTI-128T harvests micro-power from piezoelectric source, regulates VBOOST for RF transceiver, reads photodiode via IDAC-based transimpedance amp, and wakes on interrupt to transmit via sub-GHz radio. Use Value: Integrated boost converter (0.5 V start-up) and ultra-low-power sleep modes enable operation where traditional MCUs require energy storage capacitors or supercaps. | Use Scenario: Dashboard cluster module controlling backlight dimming, button feedback, and CAN message filtering in entry-level vehicles. IC Role / Device Role / Timing Role: Manages 16-channel PWM for LED backlight control, detects capacitive touch on climate controls, filters incoming CAN messages via UDB-based CRC engine, and drives segment LCD via integrated driver. Use Value: Replaces separate LED driver, touch controller, and CAN protocol handler - reduces BOM cost by $0.89 and board space by 38 mm² versus multi-chip solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3247LTI-128T | Same package and core, but adds 2 KB additional EEPROM and enhanced USB ESD protection (±8 kV contact). | Better suited for automotive-grade logging and firmware rollback requirements where extended nonvolatile storage and robustness are critical. | Select when EEPROM endurance (>1M cycles) and higher ESD immunity are mandatory; otherwise CY8C3246LTI-128T offers optimal cost/performance balance. |
| PSoC 4200DS (CY8C4247LQI-BL483) | ARM Cortex-M0+ core, lower active current (150 µA/MHz), no USB PHY, but adds BLE radio and higher GPIO count (up to 80). | Preferred for Bluetooth-connected endpoints requiring wireless telemetry, but lacks native USB and high-precision analog performance of PSoC 3. | Choose for new designs prioritizing wireless connectivity and ultra-low-power active operation; retain CY8C3246LTI-128T for USB-hosted, analog-intensive, or legacy 8051 firmware migration paths. |
Compared with CY8C3247LTI-128T, this part trades EEPROM capacity and ESD margin for lower unit cost and identical analog/digital configurability; versus PSoC 4200DS, it retains superior ADC linearity and USB integration at the expense of ARM ecosystem and BLE capability.
Availability
CY8C3246LTI-128T is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical sensor hubs, and energy-harvesting wireless nodes requiring stable component supply across multi-year production cycles.
Supply support for CY8C3246LTI-128T 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 sensing applications.
This device belongs to the PSoC® 3 product line, designed specifically for cost-sensitive, mixed-signal applications requiring high analog precision, USB connectivity, and field-programmable logic - targeting industrial automation, medical instrumentation, and consumer IoT.
FAQ
Does CY8C3246LTI-128T support USB device enumeration without an external crystal?
Yes. The device integrates a factory-trimmed internal oscillator qualified for USB Full-Speed (12 Mbps) operation under TID#40770053 certification. It achieves ±0.25% accuracy across temperature and voltage, eliminating the need for a 12 MHz crystal and associated load capacitors in most HID and CDC class implementations.
What is the maximum number of CapSense® electrodes supported on this device?
CY8C3246LTI-128T supports up to 62 capacitive sensing electrodes using its dedicated CapSense® CSD and CSX methods. All GPIO pins are CapSense-capable, and the Smart Sense™ auto-tuning algorithm compensates for environmental drift, enabling reliable operation in humid or noisy industrial settings.
Can the Delta-Sigma ADC operate simultaneously with the USB interface?
Yes. The ADC and USB subsystems operate on independent clock domains and share no critical resources. The 8–12-bit Delta-Sigma ADC can acquire samples at up to 1 MSPS while USB handles bulk transfers, verified in AN81623 and the PSoC Creator component library's concurrent usage examples.
Is the boost converter output (VBOOST) capable of powering external circuitry?
Yes. VBOOST delivers up to 100 mA at regulated 3.3 V or 5.0 V from input voltages as low as 0.5 V. It is commonly used to power external LCD bias supplies, op-amps, or RF modules - with output voltage set via firmware-controlled register bits and monitored via dedicated ADC channel.
CY8C3246LTI-128T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 68-VFQFN Exposed Pad
- 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, USB
- Peripherals:
- CapSense, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 38
- 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:
CY8C3246LTI-128T FAQ
1.How can I place an order for CY8C3246LTI-128T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3246LTI-128T 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 CY8C3246LTI-128T reliable?
The price and inventory of CY8C3246LTI-128T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3246LTI-128T is usually 5 days.
3.What payment methods are accepted for CY8C3246LTI-128T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3246LTI-128T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3246LTI-128T?
CY8C3246LTI-128T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3246LTI-128T 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 CY8C3246LTI-128T?
For technical support, including CY8C3246LTI-128T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3246LTI-128T requirements.
6.How does Aetrix verify that CY8C3246LTI-128T is sourced from the original manufacturer or authorized distributors?
All CY8C3246LTI-128T 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 CY8C3246LTI-128T meets industry standards.
7.What is the process for return or replacement of CY8C3246LTI-128T?
All CY8C3246LTI-128T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3246LTI-128T, 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 CY8C3246LTI-128T part is unused and in its original packaging.
Return procedure for CY8C3246LTI-128T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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