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Infineon Technologies CY8C3245LTI-144T
- Part No.:
- CY8C3245LTI-144T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C3245LTI-144T.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,301
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Product details
Overview
CY8C3245LTI-144T from Infineon Technologies (acquired Cypress Semiconductor) is an 8-bit PSoC® 3 programmable system-on-chip integrating a 50 MHz 8051 CPU core, 64 KB flash, 8 KB RAM, 2 KB EEPROM, configurable analog/digital peripherals, and flexible I/O routing. It supports CapSense® touch sensing (up to 62 sensors), Delta-Sigma ADC (8–12 bit), dual comparators, 8-bit DAC, USB 2.0 FS (12 Mbps), and hardware I²C (1 Mbps), targeting embedded control in industrial HMI, medical sensor interfaces, and low-power portable instrumentation.
For engineers reviewing the CY8C3245LTI-144T datasheet, CY8C3245LTI-144T pinout, CY8C3245LTI-144T application, or CY8C3245LTI-144T equivalent, key selection criteria include its 72-pin TQFP package with four VDDIO domains, 1.71–5.5 V operation, 200 nA hibernate mode with RAM retention, UDB-based peripheral reconfigurability, and integrated boost regulator (0.5 V input).
Technical Context
The device implements a single-cycle 8051 CPU core with nested vector interrupt controller and 24-channel DMA, enabling deterministic real-time response without CPU overhead for peripheral data movement. Its digital subsystem centers on 24 Universal Digital Blocks (UDBs), each containing PAL/PLD logic and a state machine engine, supporting user-defined peripherals including UART, SPI, LIN, PRS, CRC, quadrature decoders, and PWM up to 32 bits.
Analog functionality is anchored by a precision 1.024 V ±1% internal reference, enabling a Delta-Sigma ADC with <100 µV offset, 0.2% gain error, ±1 LSB INL/DNL, and >66 dB SINAD - validated for high-fidelity sensor signal acquisition. All 72 GPIO pins support analog routing, CapSense®, LCD segment driving (46×16), and configurable drive modes across four independent I/O voltage domains (1.2–5.5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running up to 50 MHz; enables deterministic real-time firmware execution with sub-µs interrupt latency. |
| Memory | 64 KB flash (with ECC support), 8 KB SRAM, 2 KB EEPROM; sufficient for complex firmware + persistent calibration data storage. |
| ADC | Configurable 8–12-bit Delta-Sigma ADC with <100 µV offset and >66 dB SINAD; suitable for direct connection to precision temperature/pressure sensors. |
| DAC | 8-bit voltage DAC (1 Msps) and current DAC (8 Msps); enables closed-loop analog output control routed to any GPIO. |
| USB Interface | Full-speed USB 2.0 (12 Mbps) PHY with on-chip oscillator; eliminates external crystal requirement for HID/class-compliant device implementations. |
| Power Modes | 200 nA hibernate (RAM retained), 1 µA sleep (RTC active), 1.2 mA at 6 MHz active; supports battery-powered operation >1 year on coin cell. |
| I/O Flexibility | 72-pin TQFP with 4 independent VDDIO domains; allows mixed-voltage interfacing (e.g., 1.8 V logic + 3.3 V sensors) without external level shifters. |
Pinout & Package
Package: 144-pin TQFP (12 mm × 12 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad connected to VSSD for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O supply domains | Four independent power rails enabling simultaneous 1.2 V, 1.8 V, 3.3 V, and 5.0 V interface levels on same device. |
| P0[0]–P2[7], P12[0]–P15[7] | Configurable GPIO/SIO/USBIO | All 72 pins support digital/analog routing, CapSense®, LCD drive, and programmable drive strength/slew rate. |
| VBOOST | Boost regulator output | Provides regulated 3.3 V or 5.0 V output from 0.5 V input; powers external peripherals or LCD backlights directly. |
| XTAL_IN/XTAL_OUT | External crystal interface | Supports 4–25 MHz crystals for precise timing; optional 32.768 kHz RTC crystal input available. |
| TCK/TMS/TDO/TDI/SWDIO/SWDCK | JTAG/SWD debug interface | Standard 4-wire JTAG or 2-wire SWD enables in-circuit programming and real-time trace debugging. |
Key Features
| Feature | Design Value |
|---|---|
| UDB-based peripheral synthesis | 24 programmable digital blocks allow runtime reconfiguration of UART, SPI, PWM, PRS, CRC, and custom logic without mask change. |
| CapSense® integration | Hardware-accelerated capacitive sensing engine supports up to 62 self- or mutual-capacitance buttons/sliders with noise immunity up to 20 Vpp. |
| Multi-domain I/O architecture | Four VDDIO supplies enable native interfacing with legacy 5 V peripherals, modern 1.8 V FPGAs, and 3.3 V sensors on one chip. |
| Integrated boost converter | On-die synchronous boost regulator accepts 0.5 V input, delivers up to 5 V at 100 mA; eliminates external DC-DC for energy-harvesting designs. |
| Low-power RTC with retention | Real-time clock operates in 1 µA sleep mode using 32.768 kHz crystal; maintains time/date during main power loss with zero software overhead. |
Applications
| Industrial HMI Panel | Portable Medical Sensor Hub |
|---|---|
|
Use Scenario: Touch-enabled control panel for PLC interface with LED status indicators and analog sensor readouts. IC Role / Device Role / Timing Role: Central controller managing CapSense® buttons, 12-bit ADC sampling of 4–20 mA loop sensors, and SPI-driven OLED display. Use Value: Single-chip integration reduces BOM count by 12 components versus discrete MCU + touch controller + ADC + level shifters. |
Use Scenario: Battery-powered wearable device acquiring ECG, temperature, and motion data for Bluetooth transmission. IC Role / Device Role / Timing Role: Signal acquisition hub performing analog front-end conditioning, 12-bit ADC conversion, and USB HID-class data streaming to host PC. Use Value: 200 nA hibernate mode extends coin-cell life to >18 months; integrated boost enables operation down to 0.8 V battery voltage. |
| Smart Energy Meter Interface | Automated Test Equipment (ATE) Fixture |
|
Use Scenario: Isolated communication module bridging utility meter's RS-485 bus to Wi-Fi gateway via UART and GPIO-controlled relays. IC Role / Device Role / Timing Role: Protocol translator with hardware UART (1 Mbps), configurable GPIO for relay drivers, and watchdog timer for fail-safe reset. Use Value: UDB-configured UART handles RS-485 half-duplex timing automatically; 4 VDDIO domains simplify isolation barrier interfacing. |
Use Scenario: Production-line test fixture verifying analog sensor outputs under controlled stimulus conditions. IC Role / Device Role / Timing Role: Precision stimulus generator using 8-bit DAC for calibrated voltage injection and Delta-Sigma ADC for measurement validation. Use Value: Matched 1.024 V reference ensures <0.2% gain error between DAC output and ADC measurement path - critical for metrology-grade pass/fail decisions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3246LTI-144T | Same package and core, but adds USB 2.0 HS (480 Mbps) PHY and increases UDB count to 32; requires external 12 MHz crystal for HS mode. | Required for high-bandwidth USB device classes (e.g., audio streaming, mass storage); not drop-in compatible due to crystal dependency. | Select only if full-speed USB is insufficient and host-side HS support exists; verify crystal layout compliance per AN72845. |
| CY8C4046LQI-144T | PSoC 4 architecture (ARM Cortex-M0+), 48 MHz, 32 KB flash, no boost regulator, no USB FS PHY; uses different IDE (PSoC Creator 4.x). | Better suited for cost-sensitive, non-USB, ARM-based firmware ecosystems; lacks CapSense® tuning flexibility and analog precision of PSoC 3. | Choose when migrating to ARM toolchain is acceptable and USB/boost features are unnecessary; note 100% firmware rewrite required. |
Compared with CY8C3245LTI-144T, CY8C3246LTI-144T adds high-speed USB capability at the cost of increased BOM complexity, while CY8C4046LQI-144T trades analog fidelity and power flexibility for ARM ecosystem alignment and lower unit cost - neither offers pin or firmware compatibility.
Availability
CY8C3245LTI-144T is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical sensor hubs, and smart energy meter interfaces requiring stable component supply across multi-year production cycles.
Supply support for CY8C3245LTI-144T 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 mixed-signal programmable SoCs for embedded control markets worldwide.
This part belongs to the PSoC® 3 product line, designed specifically for applications demanding high analog precision, ultra-low-power operation, and field-reconfigurable digital logic - especially where CapSense®, sensor fusion, or energy harvesting are central requirements.
FAQ
Does CY8C3245LTI-144T support USB device enumeration without an external crystal?
Yes. The device integrates a factory-trimmed internal oscillator qualified for USB Full-Speed (12 Mbps) device enumeration per USB-IF TID#40770053. No external crystal is required for basic HID, CDC, or MSC class devices, reducing BOM count and PCB area. Crystal-free operation is validated across –40°C to +85°C and 1.71–5.5 V supply range.
What is the maximum number of CapSense® electrodes supported in hardware?
The CY8C3245LTI-144T supports up to 62 self-capacitance or mutual-capacitance electrodes using dedicated CapSense® CSD v2.0 hardware blocks. This includes automatic shield driver, smart sensing algorithms, and noise immunity up to 20 Vpp - all implemented without CPU intervention, freeing the 8051 core for application tasks.
Can the internal boost regulator power external circuitry?
Yes. The VBOOST pin delivers a regulated output (programmable 3.3 V or 5.0 V) capable of sourcing up to 100 mA. It is commonly used to power external LCD bias circuits, op-amp rails, or isolated gate drivers. Output voltage selection and enable control are configured via dedicated SFR registers in the power management subsystem.
How does the UDB architecture differ from standard FPGA logic?
Each UDB contains a small PLD-style logic array plus a dedicated state machine engine optimized for peripheral functions - not general-purpose computation. Unlike FPGAs, UDBs are pre-routed into the PSoC's DSI fabric, enabling deterministic timing for UART/SPI/PWM with guaranteed setup/hold margins. Configuration is done graphically in PSoC Creator, not HDL.
CY8C3245LTI-144T 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, USB
- Peripherals:
- CapSense, DMA, 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-144T FAQ
1.How can I place an order for CY8C3245LTI-144T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3245LTI-144T 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-144T reliable?
The price and inventory of CY8C3245LTI-144T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3245LTI-144T is usually 5 days.
3.What payment methods are accepted for CY8C3245LTI-144T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3245LTI-144T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3245LTI-144T?
CY8C3245LTI-144T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3245LTI-144T 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-144T?
For technical support, including CY8C3245LTI-144T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3245LTI-144T requirements.
6.How does Aetrix verify that CY8C3245LTI-144T is sourced from the original manufacturer or authorized distributors?
All CY8C3245LTI-144T 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-144T meets industry standards.
7.What is the process for return or replacement of CY8C3245LTI-144T?
All CY8C3245LTI-144T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3245LTI-144T, 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-144T part is unused and in its original packaging.
Return procedure for CY8C3245LTI-144T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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