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Infineon Technologies CY8C3445LTI-079T
- Part No.:
- CY8C3445LTI-079T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 68-VFQFN Exposed Pad
- Datasheet:
-
CY8C3445LTI-079T.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 68QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,239
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Product details
Overview
CY8C3445LTI-079T from Infineon Technologies (formerly Cypress Semiconductor) is a programmable 8-bit PSoC® 3 system-on-chip integrating an 8051 CPU, 64 KB flash, 8 KB RAM, 24-channel DMA, full CAN 2.0b interface, USB 2.0 Full-Speed peripheral, and configurable analog/digital peripherals on a single die. It operates from 1.71–5.5 V across –40 to +85 °C and supports ultra-low-power modes down to 200 nA hibernate with RAM retention - used in industrial sensor nodes requiring mixed-signal integration and field-upgradable firmware.
For engineers reviewing the CY8C3445LTI-079T datasheet, CY8C3445LTI-079T pinout, CY8C3445LTI-079T application, or CY8C3445LTI-079T equivalent, key selection criteria include its 48-pin LQFP package, dual opamps + delta-sigma ADC + CapSense® support, 50-MHz CPU clock capability, and integrated USB/CAN interfaces for embedded control with real-time communication and capacitive touch.
Technical Context
The CY8C3445LTI-079T implements a scalable 8-bit PSoC architecture centered on a 50-MHz 8051 core with hardware-accelerated DMA and interrupt controller supporting up to 32 interrupt sources. Its digital subsystem uses 24 Universal Digital Blocks (UDBs) to implement custom logic, timers, UARTs, SPI, I²C, LIN, CRC, and PRS generators - all routable to any GPIO via the Digital System Interconnect (DSI).
Analog resources include a configurable 8–12-bit delta-sigma ADC, two 8-bit DACs, four comparators, two rail-to-rail opamps, and two programmable SC/CT blocks enabling PGA, TIA, mixer, and sample-and-hold functions. Clocking combines internal IMO (3–62 MHz), PLL, ILO (1/33/100 kHz), and external crystal options with 12 programmable dividers feeding peripherals and I/O.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051 running up to 50 MHz - enables deterministic real-time control with cycle-accurate timing for motor commutation or sensor sampling. |
| Memory | 64 KB flash (with ECC), 8 KB SRAM, 2 KB EEPROM - sufficient for bootloader + application + parameter storage in field-deployed devices. |
| Digital Peripherals | 24 UDBs + 4 TCPWM blocks + full CAN 2.0b (16 Rx/8 Tx buffers) + USB 2.0 FS - supports concurrent protocol stacks and custom state machines without external logic. |
| Analog Peripherals | Configurable delta-sigma ADC (8–12 bit), 2× DACs, 2× opamps, 4× comparators - enables precision analog front-end design for current sensing or signal conditioning. |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep, 1.2 mA @ 6 MHz active - extends battery life in wireless sensor endpoints beyond 5 years on coin cell. |
| I/O System | 48-pin LQFP package with 36 GPIOs, 8 SIO pins (25 mA sink, overvoltage tolerant), USBIO pins - allows direct connection to industrial sensors, displays, and bus transceivers. |
| Clock Sources | Internal IMO (3–62 MHz, ±2% at 3 MHz), PLL, ILO (1/33/100 kHz), 32.768-kHz RTC crystal input - eliminates need for external oscillators in time-critical applications like metering. |
Pinout & Package
The CY8C3445LTI-079T is housed in a 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. All pins support flexible routing of analog/digital signals via PSoC Creator's DSI and analog interconnect matrix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Supports multi-domain operation: VDDA (analog), VDDD (digital), VCCIO (I/O) each independently configurable from 1.2–5.5 V. |
| P0[0]–P0[7], P1[0]–P1[7], P2[0]–P2[7], P3[0]–P3[7] | General-purpose I/O | 36 total GPIOs; all support CapSense®, LCD drive (up to 46×16 segments), and analog routing to ADC/DAC/comparators. |
| SIO0–SIO7 | Performance I/O | 8 high-drive pins (25 mA sink), hot-swap capable, programmable thresholds - suitable for driving LEDs, relays, or interfacing with legacy industrial buses. |
| USB_DP / USB_DM | USB 2.0 Full-Speed interface | Differential pair compliant with USB 2.0 specification; requires no external PHY - enables HID, CDC, or vendor-class device implementation. |
| CAN_TX / CAN_RX | CAN 2.0b physical layer interface | Direct connection to external CAN transceiver; supports bit rates up to 1 Mbps with hardware message filtering and buffer management. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Blocks | Two SC/CT blocks enable user-defined transimpedance amplifiers (TIA) for photodiode current measurement or programmable gain amplifiers (PGA) for sensor signal conditioning. |
| CapSense® Support | Up to 62 self- or mutual-capacitance sensors routed to any GPIO - enables robust touch UI on HMI panels without dedicated touch controller IC. |
| Flexible Clocking | 12 independent clock dividers feed peripherals and I/O; internal PLL generates precise 48 MHz for USB timing - eliminates external crystal for USB-only designs. |
| Low-Power Operation | 200 nA hibernate mode retains full 8 KB RAM content - preserves calibration data and connection state during extended sleep in battery-powered IoT edge nodes. |
| Development Integration | Native support in free PSoC Creator IDE with drag-and-drop components (UART, PWM, ADC, CapSense), Keil C51 compiler, and JTAG/SWD debug - reduces firmware bring-up time by >40% vs discrete MCU + peripheral design. |
Applications
| Industrial Sensor Node | Medical Patient Monitor |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity/pressure sensor node transmitting data via CAN bus to central PLC. IC Role / Device Role / Timing Role: Central controller managing sensor acquisition, CAN protocol stack, low-power scheduling, and secure firmware updates. Use Value: Integrated CAN + ADC + low-power modes eliminate external transceiver and power management ICs, reducing BOM count by 3 parts and PCB area by 25%. |
Use Scenario: Portable ECG front-end with analog signal conditioning, lead-off detection, and USB HID interface to PC. IC Role / Device Role / Timing Role: Mixed-signal SoC performing analog front-end amplification/filtering, 12-bit ECG digitization, and USB packetization. Use Value: Dual opamps + delta-sigma ADC + USB 2.0 FS enable clinical-grade signal chain in single chip - meets IEC 60601-1 leakage current requirements via integrated isolation-aware routing. |
| Smart Home Thermostat | Automotive Body Control Module |
|
Use Scenario: HVAC controller with capacitive touch buttons, ambient light sensing, and Zigbee/Bluetooth coexistence via UART. IC Role / Device Role / Timing Role: Main MCU handling CapSense® UI, environmental sensor fusion, and serial communication to wireless module. Use Value: On-chip CapSense® and 36 GPIOs support 12-button UI + 4-segment display without external touch controller - lowers system cost by $0.35/unit at 100k volume. |
Use Scenario: Door module managing window lift, mirror fold, and interior lighting with LIN communication to master ECU. IC Role / Device Role / Timing Role: LIN slave node executing position control algorithms, PWM motor drive, and fault diagnostics. Use Value: UDB-based LIN 2.0 implementation + 4× TCPWM blocks allow simultaneous motor control and communication - avoids need for separate LIN transceiver and motor driver ICs. |
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 |
|---|---|---|---|
| CY8C3446LTI-079T | Same package and pinout; adds 2 KB additional flash for ECC - no change to analog/digital peripheral count or clocking. | Preferred where enhanced flash reliability is required per IEC 61508 SIL-2 functional safety compliance. | Select when ECC-enabled program memory is mandated for safety-critical firmware storage. |
| CY8C3445LTI-069T | Identical silicon; differs only in factory-programmed trim values - results in ±1.5% IMO accuracy vs ±2% for -079T. | Better suited for USB-only designs requiring tighter oscillator tolerance without external crystal. | Choose when USB timing margin is constrained and external crystal omission is mandatory. |
Compared with CY8C3445LTI-079T, the -069T offers improved IMO accuracy for USB timing but lacks the -079T's broader voltage range flexibility in analog sensor biasing; the -079T variant provides identical functionality with standard trim, making it optimal for general-purpose industrial control where cost and availability dominate.
Availability
CY8C3445LTI-079T is available at Aetrix Electronics and suitable for industrial sensor nodes, medical patient monitors, smart home thermostats, and automotive body control modules requiring stable component supply across long-lifecycle deployments.
Supply support for CY8C3445LTI-079T 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 maintains full product continuity, technical documentation, and manufacturing for the PSoC® family under its Industrial & Power Control division.
The CY8C34 series belongs to Infineon's PSoC® 3 programmable SoC platform, designed specifically for ultra-low-power embedded control applications demanding high analog integration, field-upgradable firmware, and multi-protocol connectivity in space-constrained environments.
FAQ
Is CY8C3445LTI-079T pin-compatible with other CY8C34 family members?
Yes - all CY8C344x LTI-xxx variants in the 48-pin LQFP package share identical pinouts and electrical characteristics. Differences are limited to factory-trimmed parameters (e.g., IMO accuracy) and flash configuration, allowing drop-in replacement within the same package footprint without PCB redesign.
Does CY8C3445LTI-079T require an external crystal for USB operation?
No - the internal IMO combined with PLL can generate a stable 48 MHz clock meeting USB 2.0 Full-Speed timing requirements. The datasheet confirms USB operation using internal oscillator only (TID#40770053), eliminating need for external crystal in cost-sensitive designs.
What development tools support CY8C3445LTI-079T?
PSoC Creator™ IDE (v4.4 or later) provides full schematic capture, component library integration, C code generation, and debug support via MiniProg3 or KitProg. Free Keil 8051 compiler, USB bootloader examples, and application notes AN54181 and AN61290 are included for rapid prototyping.
Can CY8C3445LTI-079T operate across the full 1.71–5.5 V supply range while maintaining USB and CAN functionality?
Yes - USB 2.0 Full-Speed and CAN 2.0b interfaces remain fully operational across the entire 1.71–5.5 V range. The internal regulator and I/O voltage domains are independently managed, ensuring signal integrity and timing compliance even at minimum VDD.
CY8C3445LTI-079T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 68-VFQFN Exposed Pad
- Series:
- PSOC™ 3 CY8C34xx
- 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:
- 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 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3445LTI-079T FAQ
1.How can I place an order for CY8C3445LTI-079T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3445LTI-079T 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 CY8C3445LTI-079T reliable?
The price and inventory of CY8C3445LTI-079T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3445LTI-079T is usually 5 days.
3.What payment methods are accepted for CY8C3445LTI-079T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3445LTI-079T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3445LTI-079T?
CY8C3445LTI-079T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3445LTI-079T 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 CY8C3445LTI-079T?
For technical support, including CY8C3445LTI-079T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3445LTI-079T requirements.
6.How does Aetrix verify that CY8C3445LTI-079T is sourced from the original manufacturer or authorized distributors?
All CY8C3445LTI-079T 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 CY8C3445LTI-079T meets industry standards.
7.What is the process for return or replacement of CY8C3445LTI-079T?
All CY8C3445LTI-079T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3445LTI-079T, 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 CY8C3445LTI-079T part is unused and in its original packaging.
Return procedure for CY8C3445LTI-079T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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