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Infineon Technologies CY8C3245LTI-139
- Part No.:
- CY8C3245LTI-139
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C3245LTI-139.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:605
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Product details
Overview
CY8C3245LTI-139 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® capacitive sensing capability. It operates from 1.71–5.5 V, supports up to 50 MHz clocking via internal PLL, and delivers ultra-low-power operation with 200 nA hibernate mode (RAM retention). It targets embedded control applications requiring mixed-signal integration, such as industrial HMI touch panels and battery-powered sensor nodes.
For engineers reviewing the CY8C3245LTI-139 datasheet, CY8C3245LTI-139 pinout, CY8C3245LTI-139 application, or CY8C3245LTI-139 equivalent, key selection criteria include its 48-pin SSOP package, 29 GPIOs with CapSense support, integrated USB 2.0 FS PHY, and programmable UDB-based peripheral synthesis - all critical for rapid prototyping of resource-constrained, mixed-signal designs.
Technical Context
The CY8C3245LTI-139 implements a single-cycle 8051 core running at up to 50 MHz, backed by a 24-channel DMA controller and nested vectored interrupt controller for sub-2-cycle latency. Its digital subsystem relies on 16 Universal Digital Blocks (UDBs), enabling hardware synthesis of UART, SPI, I²C, PWM, PRS, CRC, and quadrature decoders without CPU overhead.
Analog resources include an 8–12-bit Delta-Sigma ADC (±1 LSB INL/DNL, 66 dB SINAD), dual comparators, 8-bit DAC (1 MSPS VDAC / 8 MSPS IDAC), and 1.024 V ±1% reference. All analog and digital signals are fully routable to any of 29 GPIO pins via flexible interconnect, supporting simultaneous CapSense, LCD drive (up to 46×16), and USBIO functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051, up to 50 MHz - enables real-time deterministic control with minimal instruction cycles per task. |
| Flash / RAM / EEPROM | 64 KB flash (with ECC support), 8 KB SRAM, 2 KB EEPROM - sufficient for complex firmware, data logging, and secure configuration storage. |
| ADC Performance | Delta-Sigma ADC: 8–12-bit resolution, ±1 LSB INL/DNL, 66 dB SINAD - meets precision sensor interface requirements without external signal conditioning. |
| CapSense Channels | Up to 62 capacitive sensing inputs - supports multi-touch buttons, sliders, and proximity detection in human-interface applications. |
| USB Interface | Full-Speed USB 2.0 (12 Mbps) with integrated PHY and certified TID#40770053 - eliminates need for external transceiver and simplifies host communication design. |
| 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 systems. |
| Operating Voltage | 1.71–5.5 V with four independent VDDIO domains - allows direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V peripherals without level shifters. |
Pinout & Package
Package: 48-pin SSOP (Small Outline Integrated Circuit), 150 mil body width, standard JEDEC MS-012AC footprint. Compatible with automated SMT assembly and reflow profiles per IPC/JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O power domain supplies | Four independent voltage domains enable mixed-voltage I/O interfacing (e.g., 1.8 V logic + 3.3 V sensors) without external level translators. |
| P0[0]–P0[7], P1[0]–P1[7], P2[3]–P2[7] | Configurable GPIO / SIO / USBIO | 29 total GPIOs; 8 support SIO (25 mA sink, overvoltage-tolerant); two double as USB D+/D− with SWD debug capability. |
| VDDA / VSSA | Analog supply / ground | Separate analog power/ground pins reduce noise coupling into ADC/DAC paths and improve measurement accuracy. |
| XI / XO (P15[1], P15[0]) | External MHz crystal input/output | Supports 4–25 MHz crystal for precise timing; required for USB clock accuracy and high-resolution PWM generation. |
| XTAL_KHZ (P15[3], P15[2]) | 32.768 kHz RTC crystal interface | Enables low-power real-time clock operation during sleep mode with <1 µA current draw. |
| TCK/TMS/TDO/TDI/SWDIO/SWDCK | JTAG/SWD debug interface | Standard 4-wire JTAG or 2-wire SWD allows in-circuit programming and real-time debugging using MiniProg3 or third-party tools. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable UDB Array (16 blocks) | Enables hardware implementation of custom digital peripherals (e.g., LIN, I²S, CRC, PRS) without CPU intervention or FPGA licensing. |
| CapSense® with Smart Sense™ | Self-calibrating capacitive sensing engine supporting >60 electrodes with noise immunity up to 20 Vpp common-mode - ideal for wet-hand or noisy industrial environments. |
| Flexible Clock Tree | Internal IMO (3–24 MHz, ±2%), PLL (up to 50 MHz), ILO (1/33/100 kHz), and 12 programmable dividers - ensures precise timing for USB, ADC sampling, and PWM synchronization. |
| Integrated Boost Converter | 0.5 V to 5.0 V input, 5 V output at up to 100 mA - enables direct single-cell battery (e.g., LiFePO₄ or NiMH) or energy-harvesting source powering of entire system including LCD backlights. |
| Secure Flash Protection | Row-level flash lock bits, read/write protection, and nonvolatile lock registers prevent unauthorized firmware extraction or modification - critical for IP-sensitive industrial firmware. |
Applications
| Industrial HMI Panels | Portable Medical Sensors |
|---|---|
|
Use Scenario: Touch-enabled control panel for PLC operator interface with LED status indicators and serial diagnostics. IC Role / Device Role / Timing Role: Central controller managing CapSense buttons/sliders, driving 4-segment LED displays, and communicating via UART to PLC over RS-485. Use Value: Single-chip integration replaces MCU + touch controller + display driver + level shifter, reducing BOM count by ≥4 components and PCB area by 35%. |
Use Scenario: Battery-powered pulse oximeter with analog front-end, optical sensor interface, and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Signal acquisition hub performing synchronized ADC sampling (SpO₂/HR), analog comparator thresholding, and USB HID reporting to host PC. Use Value: On-chip Delta-Sigma ADC with 66 dB SINAD eliminates external op-amp filtering; 200 nA hibernate extends battery life to >12 months on CR2032. |
| Smart Home Thermostats | Energy-Harvesting IoT Nodes |
|
Use Scenario: Wi-Fi-connected HVAC controller with ambient temperature/humidity sensing, relay actuation, and capacitive touch UI. IC Role / Device Role / Timing Role: Mixed-signal processor handling I²C sensor reads, PWM fan control, CapSense UI, and bootloader updates over UART. Use Value: Programmable UDBs implement custom I²C master logic and thermal compensation algorithms in hardware, offloading 42% of CPU cycles from firmware. |
Use Scenario: Solar-powered environmental monitor measuring light, temperature, and soil moisture with LoRaWAN uplink. IC Role / Device Role / Timing Role: Ultra-low-power system manager acquiring sensor data via ADC, storing logs in EEPROM, and waking only for scheduled RF transmission. Use Value: Integrated boost converter enables operation from 0.5 V photovoltaic cell output; 1 µA sleep mode with RTC maintains accurate wake scheduling across seasonal light variations. |
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 |
|---|---|---|---|
| CY8C3245FNI-139 | Same die, 48-pin QFN package (6×6 mm), no exposed thermal pad requirement - higher thermal conductivity but requires tighter layout control. | Better suited for space-constrained PCBs where SSOP footprint is prohibitive; less compatible with legacy through-hole test fixtures. | Select for compact, thermally demanding designs where reflow compatibility and board density outweigh test accessibility needs. |
| CY8C3246LTI-139 | Identical package and pinout, but with 128 KB flash, 16 KB RAM, and additional UDBs - same peripheral set and clock architecture. | Required when firmware exceeds 64 KB or when concurrent multi-protocol stacks (e.g., USB + BLE + CAN) demand extra RAM/UDB resources. | Choose only if memory or UDB headroom is confirmed insufficient; otherwise, CY8C3245LTI-139 offers optimal cost/performance balance. |
Compared with CY8C3245FNI-139, the LTI-139 variant provides easier hand-soldering and legacy test compatibility; versus CY8C3246LTI-139, it delivers identical peripheral functionality at lower unit cost and reduced power consumption due to smaller memory array switching activity.
Availability
CY8C3245LTI-139 is available at Aetrix Electronics and suitable for industrial HMI, portable medical devices, smart home controllers, and energy-harvesting IoT nodes requiring stable component supply across extended product lifecycles.
Supply support for CY8C3245LTI-139 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 products with full backward compatibility and long-term supply commitment.
The CY8C32 series belongs to Infineon's PSoC® 3 programmable SoC family, designed specifically for cost-sensitive, ultra-low-power embedded applications requiring analog-digital integration, capacitive sensing, and USB connectivity without external components.
FAQ
Does CY8C3245LTI-139 support USB device enumeration without external crystal?
Yes - it includes a factory-trimmed internal main oscillator (IMO) that meets USB Full-Speed timing accuracy requirements when used with the on-chip PLL. The IMO operates from 3–24 MHz with ±2% tolerance at 3 MHz, and the USB PHY uses internal clock recovery to tolerate this variation, eliminating need for external 12 MHz crystal in most applications.
Can CapSense® operate reliably in high-noise industrial environments?
Yes - CY8C3245LTI-139 implements Smart Sense™ auto-tuning with shield electrode support, spread-spectrum modulation, and hardware-based noise rejection. It achieves >20 Vpp common-mode noise immunity and maintains button detection accuracy even under ESD bursts per IEC 61000-4-2 Level 4 (8 kV contact discharge).
What debug interfaces are supported, and do they require dedicated pins?
It supports 4-wire JTAG, 2-wire SWD, and SWV trace via dedicated TMS/TCK/TDO/TDI or shared SWDIO/SWDCK pins. The USBIO pins (P15[6]/P15[7]) double as SWDIO/SWDCK, allowing full debug capability without consuming additional GPIOs - essential for pin-constrained designs.
Is the internal boost converter capable of powering external circuitry?
Yes - the VBOOST output delivers up to 5 V at 100 mA with ±3% regulation. It can directly power external components such as LCD bias supplies, op-amps, or RF modules. Output voltage is fixed at 5 V; no external feedback resistors are required, simplifying power tree design.
CY8C3245LTI-139 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-VFQFN Exposed Pad
- 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, 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-139 FAQ
1.How can I place an order for CY8C3245LTI-139 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3245LTI-139 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-139 reliable?
The price and inventory of CY8C3245LTI-139 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3245LTI-139 is usually 5 days.
3.What payment methods are accepted for CY8C3245LTI-139?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3245LTI-139 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3245LTI-139?
CY8C3245LTI-139 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3245LTI-139 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-139?
For technical support, including CY8C3245LTI-139 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3245LTI-139 requirements.
6.How does Aetrix verify that CY8C3245LTI-139 is sourced from the original manufacturer or authorized distributors?
All CY8C3245LTI-139 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-139 meets industry standards.
7.What is the process for return or replacement of CY8C3245LTI-139?
All CY8C3245LTI-139 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3245LTI-139, 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-139 part is unused and in its original packaging.
Return procedure for CY8C3245LTI-139:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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