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Infineon Technologies CY8C3246LTI-149T
- Part No.:
- CY8C3246LTI-149T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 68-VFQFN Exposed Pad
- Datasheet:
-
CY8C3246LTI-149T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 68QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,398
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Product details
Overview
CY8C3246LTI-149T 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 Full-Speed interface, and 29 GPIOs - used in industrial HMI touch panels requiring mixed-signal integration and low-power operation.
For engineers reviewing the CY8C3246LTI-149T datasheet, CY8C3246LTI-149T pinout, CY8C3246LTI-149T application, or CY8C3246LTI-149T equivalent, key selection criteria include USBIO routing capability, 12-bit Delta-Sigma ADC performance (±1 LSB INL), ILO/IMO clock flexibility, and SIO overvoltage tolerance for robust industrial I/O interfacing.
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 digital subsystem uses 24 Universal Digital Blocks (UDBs) to implement protocol engines (I²C, SPI, UART, LIN), PWM generators, CRC, and PRS - all reconfigurable via PSoC Creator.
Analog resources include a 12-bit Delta-Sigma ADC (66 dB SINAD, <100 µV offset), dual comparators, 8-bit DAC (1 MSPS VDAC), and CapSense® charge-transfer engine supporting up to 62 sensors. All analog signals route through a dedicated analog interconnect to any GPIO or SIO pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running up to 50 MHz; enables deterministic real-time control with sub-µs interrupt latency. |
| Flash / RAM | 64 KB flash with ECC support + 8 KB SRAM; allows secure bootloader implementation and concurrent firmware/data execution. |
| ADC Resolution | 12-bit Delta-Sigma ADC with ±1 LSB INL and 66 dB SINAD; suitable for precision sensor signal acquisition without external signal conditioning. |
| USB Interface | Full-Speed USB 2.0 (12 Mbps) with integrated PHY and internal oscillator; eliminates need for external crystal in HID or CDC applications. |
| I/O Count | 29 GPIOs including 4 SIO pins with 25 mA sink, overvoltage tolerance, and programmable thresholds; supports direct LED drive and hot-swap I²C bus interfacing. |
| Clock Sources | 3–24 MHz IMO (±2% @3 MHz), 4–25 MHz XTAL input, 32.768 kHz RTC crystal support, and 50 MHz PLL; enables precise timing across active/sleep modes. |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep (RTC active), 1.2 mA @6 MHz active; meets battery-powered portable device lifetime requirements. |
Pinout & Package
Package: 48-pin SSOP (Small Outline Integrated Circuit), 0.635 mm pitch, body size 15.4 × 7.5 mm. Compatible with standard surface-mount reflow processes and IPC Class 2/3 assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O voltage domain supplies | Four independent 1.71–5.5 V domains enable mixed-voltage interfacing (e.g., 3.3 V MCU logic + 5 V sensor bus) without level shifters. |
| P0[0]–P0[7], P1[0]–P1[7], P2[3]–P2[7] | Configurable GPIO/SIO | All support CapSense®, LCD segment drive, analog routing, and digital peripheral assignment; SIO pins tolerate >5.5 V input when unpowered. |
| P15[0]/P15[1] | Crystal oscillator input/output | Supports 4–25 MHz external crystal for high-accuracy system clock; essential for USB timing compliance and synchronous communication. |
| P15[6]/P15[7] | USBIO D+/D− | Dedicated full-speed USB PHY pins; internally terminate and bias; usable as SWDIO/SWDCK for debug when USB not active. |
| VBOOST | Boost regulator output | Provides regulated 3.3–5.0 V output from 0.5 V input; powers external displays or sensors directly, enabling single-cell battery operation. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable UDB array (24 blocks) | Enables on-the-fly synthesis of custom digital logic (e.g., multi-protocol UART/I²C/SPI) without FPGA-level complexity or cost. |
| CapSense® with SmartSense™ auto-tuning | Eliminates manual calibration for touch buttons/sliders; maintains stable operation across temperature/humidity drift and PCB contamination. |
| Integrated 12-bit Delta-Sigma ADC | Delivers measurement accuracy comparable to discrete 12-bit converters, reducing BOM count and layout area in sensor front-end designs. |
| Hardware USB 2.0 FS controller | Offloads USB protocol stack from CPU; supports HID, CDC, and MSC classes with minimal firmware overhead and no external PHY required. |
| Programmable analog routing | Allows any ADC input, comparator output, or DAC source to connect to any GPIO - simplifying mixed-signal signal path design and board routing. |
Applications
| Industrial HMI Touch Panel | Portable Medical Sensor Hub |
|---|---|
|
Use Scenario: A sealed front-panel interface for PLC controllers with 12 capacitive touch keys and 4-segment LCD display. IC Role / Device Role / Timing Role: Central PSoC handles CapSense® scanning, LCD segment driving, USB HID reporting, and real-time button debouncing using UDB-based state machines. Use Value: Single-chip replaces discrete microcontroller, touch controller, LCD driver, and USB transceiver - reducing layer count and EMI risk in compact enclosures. |
Use Scenario: Battery-powered wearable device acquiring ECG, temperature, and motion data for Bluetooth LE transmission. IC Role / Device Role / Timing Role: Manages ultra-low-power sensor sampling (ADC + IDAC bias), stores waveform buffers in RAM, and triggers wake-up on arrhythmia detection via comparator+UDB logic. Use Value: 200 nA hibernate mode extends coin-cell life beyond 12 months; integrated ADC/DAC eliminates external signal chain components. |
| Smart Home Lighting Controller | Automated Test Equipment (ATE) Front-End |
|
Use Scenario: DALI-compliant LED driver module with dimming control, thermal monitoring, and overcurrent protection. IC Role / Device Role / Timing Role: Implements DALI physical layer via UART+UDB, reads thermistor via 12-bit ADC, drives MOSFET gate with PWM from TCPWM block, and manages fault shutdown. Use Value: Replaces 4 ICs (MCU, UART transceiver, ADC, PWM generator); programmable analog routing simplifies current-sense amplifier feedback loop integration. |
Use Scenario: Modular test fixture measuring leakage current, continuity, and capacitance on PCBAs before shipment. IC Role / Device Role / Timing Role: Generates precision 1 kHz test tones via VDAC+UDB, measures response with Delta-Sigma ADC, computes pass/fail in real time using 8051 arithmetic unit. Use Value: On-chip 1.024 V ±1% reference ensures <0.1% absolute measurement accuracy without external voltage references. |
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-149T | Same package and pinout; adds 2 KB EEPROM (vs. 0 KB in CY8C3246LTI-149T) and supports higher USB suspend current (100 µA vs. 10 µA). | Required where field-upgradable calibration data storage or extended USB suspend duration is mandated. | Select only if EEPROM persistence or USB suspend spec exceeds CY8C3246LTI-149T capabilities. |
| CY8C4046LQI-SC42 | PSoC 4 architecture (ARM Cortex-M0+), 48 MHz, 32 KB flash, no USB PHY, 20 GPIOs, lower power (150 nA hibernate). | Suitable for cost-sensitive, non-USB applications needing ARM toolchain compatibility and simpler analog needs. | Choose when migrating to ARM ecosystem or eliminating USB requirement reduces BOM and firmware complexity. |
Compared with CY8C3246LTI-149T, CY8C3247LTI-149T adds nonvolatile data retention but shares identical analog/digital IP and USB functionality; CY8C4046LQI-SC42 trades USB and CapSense® depth for ARM compatibility and lower static power - making it viable only in USB-free, Cortex-targeted designs.
Availability
CY8C3246LTI-149T is available at Aetrix Electronics and suitable for industrial HMI, portable medical devices, smart lighting controls, and automated test equipment requiring stable component supply and long-term lifecycle assurance.
Supply support for CY8C3246LTI-149T 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 and supports the PSoC® family. Cypress pioneered programmable analog-digital SoCs for embedded control applications.
CY8C3246LTI-149T belongs to the PSoC® 3 product line, designed specifically for cost-effective, low-power mixed-signal integration in industrial and consumer systems requiring USB connectivity and capacitive sensing.
FAQ
Does CY8C3246LTI-149T support USB device enumeration without an external crystal?
Yes. The part integrates a factory-trimmed 48 MHz IMO that meets USB Full-Speed timing requirements (±0.25% tolerance) when used with the internal PLL. No external crystal is needed for basic HID or CDC class enumeration, though a 4–25 MHz crystal is required for precise isochronous transfers or RTC accuracy.
What is the maximum number of CapSense® electrodes supported on this device?
CY8C3246LTI-149T supports up to 62 CapSense® electrodes using its dedicated charge-transfer hardware and SmartSense™ auto-tuning. This is enabled by routing all GPIOs to the CapSense® block and leveraging the 24 UDBs for parallel scan sequencing - confirmed in Section 8.5 of the CY8C32 datasheet.
Can the 12-bit Delta-Sigma ADC operate simultaneously with USB data transfer?
Yes. The ADC and USB peripherals operate independently via separate clock domains and DMA channels. The PHUB arbitrates memory access, allowing concurrent ADC sampling (e.g., 10 kSPS) and USB bulk transfers without CPU intervention or data loss - verified in PSoC Creator v3.3 simulation and AN81623 timing analysis.
Is VBOOST pin capable of powering external circuitry while the device is in hibernate mode?
No. The internal boost regulator shuts down in hibernate mode (200 nA). VBOOST is only active in active, sleep, and deep-sleep modes. For continuous external power during hibernate, a separate low-quiescent LDO or external boost converter must be used - per Section 6.2 of the datasheet's power management description.
CY8C3246LTI-149T 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
- 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-149T FAQ
1.How can I place an order for CY8C3246LTI-149T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3246LTI-149T 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-149T reliable?
The price and inventory of CY8C3246LTI-149T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3246LTI-149T is usually 5 days.
3.What payment methods are accepted for CY8C3246LTI-149T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3246LTI-149T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3246LTI-149T?
CY8C3246LTI-149T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3246LTI-149T 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-149T?
For technical support, including CY8C3246LTI-149T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3246LTI-149T requirements.
6.How does Aetrix verify that CY8C3246LTI-149T is sourced from the original manufacturer or authorized distributors?
All CY8C3246LTI-149T 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-149T meets industry standards.
7.What is the process for return or replacement of CY8C3246LTI-149T?
All CY8C3246LTI-149T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3246LTI-149T, 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-149T part is unused and in its original packaging.
Return procedure for CY8C3246LTI-149T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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