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Infineon Technologies CY8C3245LTI-139T
- Part No.:
- CY8C3245LTI-139T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C3245LTI-139T.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,033
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Product details
Overview
CY8C3245LTI-139T from Infineon Technologies (acquired Cypress Semiconductor) is a programmable 8-bit PSoC® 3 system-on-chip integrating an 8051 CPU core, configurable analog and digital peripherals, 64 KB flash, 8 KB RAM, and CapSense® capacitive sensing capability. It operates from 1.71–5.5 V at up to 50 MHz, supports USB 2.0 Full-Speed (12 Mbps), and targets embedded control in human-interface, sensor hub, and low-power industrial applications.
For engineers reviewing the CY8C3245LTI-139T datasheet, CY8C3245LTI-139T pinout, CY8C3245LTI-139T application, or CY8C3245LTI-139T equivalent, key selection criteria include its 48-pin SSOP package, integrated Delta-Sigma ADC (12-bit, <±1 LSB INL), dual voltage comparators, 24-channel DMA, and flexible I/O routing supporting CapSense on all GPIOs.
Technical Context
The device implements a single-cycle 8051 CPU with nested vectored interrupt controller and 24-channel PHUB-based DMA, enabling peripheral-to-memory transfers without CPU intervention. Its clock tree integrates a 3–24 MHz internal main oscillator (IMO, ±2% at 3 MHz), 50 MHz PLL, and independent 1 kHz/33 kHz ILO for ultra-low-power sleep modes.
Analog subsystem includes a configurable Delta-Sigma ADC (8–12-bit, 66 dB SINAD, <100 µV offset), 8-bit DAC (1 Msps VDAC / 8 Msps IDAC), two rail-to-rail comparators, and 1.024 V ±1% reference - all routable to any of 29 GPIO pins 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 | 64 KB flash with ECC support + 8 KB SRAM; sufficient for complex firmware with bootloader and secure storage. |
| ADC Resolution | Configurable 8–12-bit Delta-Sigma ADC; delivers <±1 LSB INL and 66 dB SINAD for precision sensor signal acquisition. |
| USB Interface | Full-Speed USB 2.0 (12 Mbps) with internal oscillator; eliminates need for external crystal in HID/class-compliant designs. |
| I/O Count | 29 GPIO pins (including 4 SIO); all support CapSense®, LCD drive, analog routing, and programmable drive strength. |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep (RTC active); enables battery-powered operation for >10 years. |
| Operating Voltage | 1.71–5.5 V supply range; supports direct single-cell Li-ion, alkaline, or coin-cell battery integration. |
Pinout & Package
Package: 48-pin SSOP (Small Outline Integrated Circuit), 0.635 mm pitch, body size 15.4 × 7.5 mm - suitable for cost-sensitive industrial and consumer PCBs with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O power domains | Four independent voltage rails (1.2–5.5 V) enable mixed-voltage interfacing without external level shifters. |
| P0[0]–P2[7], P12[0–3], P15[0–7] | Configurable GPIO/SIO/USBIO | All 29 pins support digital, analog input/output, CapSense, and LCD segment/com drive - fully routable via PSoC Creator. |
| VDDA / VSSA | Analog power/ground | Separate analog supply improves ADC/DAC SNR and reduces coupling noise from digital switching. |
| XTAL_IN / XTAL_OUT | External crystal interface | Supports 4–25 MHz crystals for precise timing; optional 32.768 kHz RTC crystal input on P15[1]/P15[2]. |
| TCK/TMS/TDO/TDI | JTAG debug interface | 4-wire boundary-scan interface for programming, debugging, and production test - compatible with MiniProg3 and industry-standard tools. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable UDB array (24 blocks) | Enables custom digital logic (UART, SPI, PRS, CRC, quadrature decoder) without FPGA - synthesized in PSoC Creator schematic flow. |
| CapSense® on all GPIO | Supports up to 62 self- or mutual-capacitance sensors using only firmware configuration - no external components required. |
| Integrated boost converter | Generates up to 5 V from 0.5 V input; powers internal circuitry and external peripherals (e.g., LCD bias) from single low-voltage source. |
| Flexible clock routing | 12 programmable clock dividers distribute IMO, PLL, ILO, or external clocks to any peripheral - simplifies timing-critical design partitioning. |
| Secure flash protection | Read/write lock per flash row + nonvolatile configuration locks; prevents IP theft and unauthorized firmware modification in field-deployed devices. |
Applications
| Industrial HMI Panels | Medical Sensor Nodes |
|---|---|
|
Use Scenario: Touch-enabled control panels for HVAC, PLC interfaces, or portable diagnostic equipment requiring robust ESD immunity and low standby current. IC Role / Device Role / Timing Role: Central controller managing CapSense buttons/sliders, analog sensor front-end (thermistor, pressure), and USB HID communication to host PC. Use Value: Single-chip integration replaces MCU + touch controller + ADC + USB transceiver - reducing BOM count by ≥4 components and PCB area by >30%. |
Use Scenario: Battery-powered wearable vital sign monitors (pulse oximetry, temperature, ECG) needing sub-µA sleep and high-accuracy analog acquisition. IC Role / Device Role / Timing Role: Analog front-end aggregator with 12-bit Delta-Sigma ADC (66 dB SINAD), programmable gain amplifier, and real-time data compression before BLE transmission. Use Value: On-chip ADC offset/gain calibration and hardware CRC offload reduce firmware overhead and improve measurement repeatability across temperature. |
| Smart Home Sensors | Automotive Body Control |
|
Use Scenario: Zigbee/Z-Wave door/window sensors and occupancy detectors operating on CR2032 coin cells with 5+ year battery life. IC Role / Device Role / Timing Role: Ultra-low-power wake-on-event controller using SIO pins for magnetic reed switch input and integrated RTC for scheduled reporting. Use Value: 200 nA hibernate mode with RAM retention preserves sensor state and network keys - eliminating cold-start delays and re-pairing. |
Use Scenario: LED lighting modules and mirror controls in entry-level vehicles requiring AEC-Q100 Grade 3 compliance and CAN/LIN interoperability. IC Role / Device Role / Timing Role: Secondary microcontroller handling PWM dimming, CapSense proximity detection, and LIN slave communication via UDB-synthesized LIN 2.0 stack. Use Value: Programmable digital blocks implement LIN protocol in firmware - avoiding dedicated LIN transceivers and reducing qualification effort. |
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 |
|---|---|---|---|
| CY8C3245FVI-139 | Same die, 48-pin QFN package (6 × 6 mm); no SSOP footprint compatibility. | Better thermal performance and higher density layout; unsuitable for through-hole or legacy SSOP reflow lines. | Select when board space is constrained and QFN assembly capability exists. |
| CY8C4014LQI-422 | PSoC 4 (ARM Cortex-M0+), 16 KB flash, no USB FS, no boost converter, lower analog precision (12-bit SAR ADC). | Targets cost-optimized IoT endpoints where USB and analog fidelity are secondary to Cortex ecosystem and BLE readiness. | Choose for new Cortex-based firmware stacks or when USB/CapSense resolution requirements are relaxed. |
Compared with CY8C3245FVI-139, the LTI-139T offers identical functionality in SSOP for legacy manufacturing; versus CY8C4014LQI-422, it provides superior analog accuracy, integrated USB, and ultra-low-power hibernate - critical for sensor-hub and human-interface designs demanding long battery life and high-fidelity touch.
Availability
CY8C3245LTI-139T is available at Aetrix Electronics and suitable for industrial HMI panels, medical sensor nodes, smart home sensors, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for CY8C3245LTI-139T 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 full PSoC® portfolio, including legacy Cypress devices with full documentation and toolchain continuity.
This part belongs to the PSoC® 3 family - designed specifically for highly integrated, low-power embedded control applications requiring programmable analog/digital resources, CapSense® touch, and USB connectivity in a single chip.
FAQ
Does CY8C3245LTI-139T support USB without an external crystal?
Yes. The device integrates a factory-trimmed internal oscillator qualified for USB Full-Speed (12 Mbps) operation, certified under TID#40770053. No external crystal is required for USB HID or CDC class implementations, reducing BOM cost and board space. External crystals remain optional for higher timing accuracy or RTC functionality.
What is the maximum number of CapSense® sensors supported on this part?
CY8C3245LTI-139T supports up to 62 CapSense® sensors using all 29 GPIO pins in mutual-capacitance mode or self-capacitance mode. This is enabled by dedicated hardware scan engine and firmware libraries in PSoC Creator; no additional ICs or RC networks are needed for baseline tracking or noise immunity.
Can the internal boost converter power external circuitry?
Yes. The VBOOST output pin delivers up to 5 V at 100 mA and can directly power external components such as LCD bias supplies, op-amp rails, or sensor excitation circuits. Its input accepts voltages as low as 0.5 V, enabling operation from single NiMH, LiFePO₄, or energy-harvesting sources.
Is JTAG the only debug interface supported?
No. In addition to 4-wire JTAG, CY8C3245LTI-139T supports 2-wire SWD (Serial Wire Debug) and SWV (Serial Wire Viewer) for printf-style tracing. All three interfaces share pins with GPIO functions and are accessible via MiniProg3 or third-party ARM-compliant debug probes - providing flexibility for production test and field firmware updates.
CY8C3245LTI-139T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-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:
- 25
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 4K 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:
CY8C3245LTI-139T FAQ
1.How can I place an order for CY8C3245LTI-139T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3245LTI-139T 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 CY8C3245LTI-139T reliable?
The price and inventory of CY8C3245LTI-139T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3245LTI-139T is usually 5 days.
3.What payment methods are accepted for CY8C3245LTI-139T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3245LTI-139T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3245LTI-139T?
CY8C3245LTI-139T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3245LTI-139T 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 CY8C3245LTI-139T?
For technical support, including CY8C3245LTI-139T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3245LTI-139T requirements.
6.How does Aetrix verify that CY8C3245LTI-139T is sourced from the original manufacturer or authorized distributors?
All CY8C3245LTI-139T 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 CY8C3245LTI-139T meets industry standards.
7.What is the process for return or replacement of CY8C3245LTI-139T?
All CY8C3245LTI-139T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3245LTI-139T, 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 CY8C3245LTI-139T part is unused and in its original packaging.
Return procedure for CY8C3245LTI-139T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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