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Infineon Technologies CY8C3445LTI-078T
- Part No.:
- CY8C3445LTI-078T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C3445LTI-078T.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,984
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Product details
Overview
CY8C3445LTI-078T from Infineon Technologies (formerly Cypress) is a programmable 8-bit PSoC® 3 system-on-chip featuring an 8051 CPU core, 64 KB flash, 8 KB RAM, full CAN 2.0b interface, USB 2.0 Full-Speed peripheral, and configurable analog/digital peripherals. It operates from 1.71–5.5 V across –40 to +85 °C, supports 50-MHz operation, and integrates 24 universal digital blocks (UDBs) for custom logic synthesis - used in industrial sensor hubs requiring mixed-signal integration and field-upgradable firmware.
For engineers reviewing the CY8C3445LTI-078T datasheet, CY8C3445LTI-078T pinout, CY8C3445LTI-078T application, or CY8C3445LTI-078T equivalent, key selection criteria include its 48-pin TQFP package, dual opamps with programmable gain amplifier (PGA) capability, CapSense® support for up to 62 sensors, 12-bit delta-sigma ADC, and integrated USBIO pins enabling direct USB device connectivity without external transceivers.
Technical Context
The CY8C3445LTI-078T implements a highly flexible mixed-signal architecture centered on a 50-MHz 8051 CPU with 24-channel DMA and 32 interrupt inputs. Its digital subsystem uses a UDB array and Digital System Interconnect (DSI) to route any peripheral function-including UART, SPI, LIN, CRC, or quadrature decoder-to any GPIO.
Analog resources include two independent opamps, four comparators, a 12-bit delta-sigma ADC with programmable input range, two 8-bit DACs, and two SC/CT blocks supporting PGA, TIA, mixer, and sample-and-hold configurations - all configurable via PSoC Creator™ schematic entry without HDL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051 running up to 50 MHz; enables deterministic real-time control with low-latency ISR response for motor commutation or sensor fusion. |
| Memory | 64 KB flash (with ECC), 8 KB RAM, 2 KB EEPROM; supports secure firmware updates and parameter storage across power cycles. |
| USB Interface | USB 2.0 Full-Speed (12 Mbps) peripheral with internal oscillator; eliminates need for external crystal or PHY in HID or CDC-class devices. |
| CAN Interface | Full CAN 2.0b compliant with 16 Rx / 8 Tx buffers; supports robust industrial fieldbus communication at up to 1 Mbps. |
| Analog Peripherals | 12-bit delta-sigma ADC (up to 192 ksps), 2× 8-bit DACs, 2× opamps, 4× comparators, CapSense® engine; enables single-chip analog front-end for touch + temperature + current sensing. |
| Power Modes | Active (1.2 mA @ 6 MHz), Sleep (1 µA), Hibernate (200 nA w/ RAM retention); suitable for battery-powered edge nodes with multi-year runtime. |
| Package | 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch); RoHS-compliant, reflow-compatible, and validated for industrial PCB assembly. |
Pinout & Package
Package: 48-pin Thin Quad Flat Package (TQFP), 7 mm × 7 mm body, 0.5 mm lead pitch, exposed thermal pad (EPAD) connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | General-purpose I/O (GPIO) | Routable to any digital/analog peripheral; supports CapSense®, LCD drive, and high-current sink (25 mA) on SIO-capable pins. |
| P1[0]–P1[7] | General-purpose I/O (GPIO) | Includes USBIO functionality on P1[0]/P1[1]; supports hot-swap tolerance and overvoltage protection up to 5.5 V. |
| VDD, VSS | Power supply and ground | Dual power domains supported; VDD accepts 1.71–5.5 V; internal LDO regulates core voltage for stable 50-MHz operation. |
| XRES | External reset input | Active-low asynchronous reset; debounced internally; compatible with pushbutton or microcontroller-driven reset sequencing. |
| TCK, TMS, TDI, TDO | JTAG debug interface | 4-wire boundary scan and programming interface; supports in-circuit debugging and flash programming without bootloader dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable UDB Array | 24 universal digital blocks enable hardware-level implementation of custom protocols (e.g., proprietary sensor bus) or math accelerators without CPU overhead. |
| CapSense® Engine | Hardware-accelerated capacitive sensing for up to 62 electrodes; supports proximity, slider, and gesture detection with <1% baseline drift over temperature. |
| Programmable Analog Blocks | Two SC/CT blocks support PGA (gain 1–48), TIA (for photodiode current-to-voltage conversion), and mixer functions - eliminating discrete opamp networks. |
| Integrated USBIO | Dedicated USB transceiver circuitry on P1[0]/P1[1] with internal 1.5-kΩ pull-up; enables USB device enumeration using only internal oscillator - no external crystal required. |
| Multi-Voltage I/O | I/O pins support 1.2–5.5 V interface levels across up to four independent power domains; simplifies interfacing with legacy 3.3 V or 5 V peripherals. |
Applications
| Industrial Sensor Hub | Medical Wearable Monitor |
|---|---|
|
Use Scenario: Central node aggregating temperature, humidity, and motion data from multiple analog/digital sensors in factory automation. IC Role / Device Role / Timing Role: Mixed-signal controller performing simultaneous ADC sampling, CAN message framing, and local decision logic. Use Value: Single-chip integration reduces BOM count by 7+ discrete ICs and eliminates inter-chip timing skew in synchronized sensor reads. |
Use Scenario: Battery-powered wrist-worn device measuring ECG, skin temperature, and activity via dry-electrode sensors. IC Role / Device Role / Timing Role: Low-power analog front-end and signal processor with CapSense® for buttonless UI and hibernate-mode wake-on-motion. Use Value: 200-nA hibernate mode with RAM retention extends battery life beyond 12 months; on-chip opamps condition microvolt-level ECG signals. |
| Automotive Body Control Module | Smart Home Touch Panel |
|
Use Scenario: Door module managing window lift, mirror adjustment, and interior lighting via LIN/CAN gateways. IC Role / Device Role / Timing Role: CAN 2.0b endpoint with 16 Rx buffers handling priority-based message filtering and LIN master emulation. Use Value: Hardware CAN filtering offloads CPU; UDBs implement LIN physical layer timing without software bit-banging. |
Use Scenario: Wall-mounted control panel with projected-capacitive touch, ambient light sensing, and RGB LED feedback. IC Role / Device Role / Timing Role: CapSense® controller with self- and mutual-capacitance scanning plus integrated 8-bit DACs driving LED current sinks. Use Value: Single-chip touch + lighting control eliminates separate touch IC and LED driver; 12-bit ADC measures ambient light for auto-brightness. |
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 core, but includes USB 2.0 Full-Speed with crystal-less operation enabled; lacks CapSense® tuning support in ROM. | Better suited for USB HID devices where touch is unnecessary; requires external 32.768-kHz crystal for RTC if used. | Select when USB device class compliance is primary and CapSense® calibration flexibility is not required. |
| STM32F072RBT6 | ARM Cortex-M0 core, 128 KB flash, no integrated CapSense® or SC/CT analog blocks; relies on external components for precision analog functions. | Requires external opamps, ADC, and touch controller for equivalent analog capability; higher BOM cost and layout complexity. | Prefer for pure digital control tasks with standard peripherals; avoid when analog configurability or capacitive sensing is essential. |
Compared with CY8C3445LTI-078T, the CY8C3446LTI-079T trades CapSense® flexibility for guaranteed USB crystal-less operation, while the STM32F072RBT6 offers higher flash but demands external analog circuitry - making CY8C3445LTI-078T optimal for compact, analog-rich embedded systems needing field-programmable hardware blocks.
Availability
CY8C3445LTI-078T is available at Aetrix Electronics and suitable for industrial sensor hubs, medical wearables, automotive body controllers, and smart home touch panels requiring stable component supply, long-term lifecycle support, and qualified reflow-compatible packaging.
Supply support for CY8C3445LTI-078T 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® portfolio.
The CY8C34 family belongs to Infineon's programmable mixed-signal SoC product line, designed to replace discrete analog/digital component combinations in cost-sensitive, space-constrained embedded systems requiring rapid customization.
FAQ
Does CY8C3445LTI-078T support USB device enumeration without an external crystal?
Yes. The part integrates a crystal-less USB 2.0 Full-Speed transceiver that uses its internal IMO (Internal Main Oscillator) trimmed to ±0.25% accuracy for USB packet timing. This eliminates the need for a 12-MHz external crystal while maintaining full USB-IF certification (TID#40770053).
What is the maximum number of CapSense® electrodes supported in hardware?
The CY8C3445LTI-078T supports up to 62 CapSense® electrodes in mutual-capacitance mode and 32 in self-capacitance mode, using dedicated hardware scan engines. Electrode count is limited only by available GPIOs and routing constraints-not firmware overhead.
Can the 12-bit delta-sigma ADC operate concurrently with the USB interface?
Yes. The ADC and USB subsystems operate independently on separate clock domains. The ADC can perform continuous conversions at up to 192 ksps while USB handles data transfers, with DMA automatically moving sampled data to USB endpoints without CPU intervention.
Is the 24-channel DMA controller accessible to all peripherals?
Yes. All digital peripherals-including TCPWM, I2C, SPI, CAN, and USB-can trigger DMA requests. The PHUB (Peripheral Hub) arbitrates access to the 24-channel DMA controller, enabling zero-CPU-overhead data movement between peripherals and memory.
CY8C3445LTI-078T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-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:
- 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 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3445LTI-078T FAQ
1.How can I place an order for CY8C3445LTI-078T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3445LTI-078T 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-078T reliable?
The price and inventory of CY8C3445LTI-078T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3445LTI-078T is usually 5 days.
3.What payment methods are accepted for CY8C3445LTI-078T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3445LTI-078T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3445LTI-078T?
CY8C3445LTI-078T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3445LTI-078T 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-078T?
For technical support, including CY8C3445LTI-078T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3445LTI-078T requirements.
6.How does Aetrix verify that CY8C3445LTI-078T is sourced from the original manufacturer or authorized distributors?
All CY8C3445LTI-078T 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-078T meets industry standards.
7.What is the process for return or replacement of CY8C3445LTI-078T?
All CY8C3445LTI-078T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3445LTI-078T, 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-078T part is unused and in its original packaging.
Return procedure for CY8C3445LTI-078T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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