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Infineon Technologies CY8C3446LTI-073T
- Part No.:
- CY8C3446LTI-073T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C3446LTI-073T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,458
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Product details
Overview
CY8C3446LTI-073T from Infineon Technologies (formerly Cypress) is a programmable 8-bit PSoC® 3 system-on-chip integrating an 8051 CPU, 64 KB flash, 8 KB RAM, 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, supports 50-MHz CPU clocking via internal PLL, and targets embedded control in industrial sensors and medical monitoring devices.
For engineers reviewing the CY8C3446LTI-073T datasheet, CY8C3446LTI-073T pinout, CY8C3446LTI-073T application, or CY8C3446LTI-073T equivalent, key selection criteria include its dual-domain power architecture, CapSense® support for up to 62 sensors, 24-channel DMA, and routing flexibility enabling any peripheral function to any GPIO - critical for rapid prototyping of mixed-signal IoT edge nodes.
Technical Context
The CY8C3446LTI-073T implements a tightly coupled 8051 CPU core with PHUB-based DMA controller and interrupt-driven peripheral arbitration. Its digital subsystem relies on 24 Universal Digital Blocks (UDBs), each combining PAL/PLD logic and state machines to synthesize UART, SPI, LIN, CRC, quadrature decoders, or custom gate-level logic without external components.
Analog functionality is delivered through two opamps, four comparators, two 8-bit DACs, a configurable delta-sigma ADC (8–12-bit), and two programmable SC/CT blocks supporting PGA, TIA, mixer, and sample-and-hold topologies - all routed flexibly via analog interconnect to up to 62 GPIOs with independent voltage domain control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit 8051 running up to 50 MHz; enables deterministic real-time control with 32 interrupt inputs and low-latency peripheral response. |
| Memory | 64 KB flash (with ECC-capable 8 KB additional flash), 8 KB SRAM, 2 KB EEPROM; supports secure firmware updates and data logging with retention. |
| Digital Peripherals | Full CAN 2.0b (16 Rx/8 Tx buffers), USB 2.0 FS (12 Mbps), I²C (1 Mbps), 4× TCPWM blocks; eliminates need for discrete protocol transceivers in industrial networks. |
| Analog Subsystem | Configurable delta-sigma ADC (8–12-bit), 2× 8-bit DACs, 2× opamps, 4× comparators, 2× SC/CT blocks; enables sensor signal conditioning and closed-loop analog control in one chip. |
| Power Management | Active mode: 1.2 mA @ 6 MHz / 12 mA @ 48 MHz; Sleep: 1 µA; Hibernate: 200 nA with RAM retention; supports battery-powered operation for >5 years in duty-cycled sensing. |
| I/O System | Up to 62 GPIOs with 1.2–5.5 V interface voltage, hot-swap tolerance, CapSense® on any pin, LCD direct drive (46×16 segments); simplifies front-panel and display integration. |
| Clock Sources | Internal IMO (3–62 MHz, ±2% at 3 MHz), PLL (up to 50 MHz), 32.768 kHz watch crystal input, 4–25 MHz external crystal; provides precise timing for RTC, USB, and communication protocols. |
Pinout & Package
Package: 68-pin QFN (9 mm × 9 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | Independent I/O power domains | Enable mixed-voltage interfacing (1.2–5.5 V) across four isolated rail groups for level-shifting and noise isolation. |
| P0[0]–P0[7], P1[0]–P1[7], etc. | Configurable GPIO / peripheral multiplex | Each pin supports digital/analog routing to UDBs, ADC, DAC, CapSense®, USBIO, or SIO functions via DSI/AI interconnect. |
| USB_DP / USB_DM | USB 2.0 Full-Speed differential pair | Integrated transceiver with internal termination; requires no external PHY or resistors for basic USB device connectivity. |
| CAN_TX / CAN_RX | Controller Area Network interface | Dedicated differential signaling pins with internal CAN controller logic; compatible with ISO 11898-2 physical layer when paired with external transceiver. |
| XRES | External reset input | Active-low asynchronous reset with internal pull-up; supports system-level fault recovery and brown-out coordination. |
| SWDCK / SWDIO | Serial Wire Debug interface | 2-wire debug port supporting programming, real-time trace, and breakpoints without JTAG overhead or pin count penalty. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Blocks (SC/CT) | Two reconfigurable switched-capacitor/continuous-time blocks implement PGA, TIA, mixer, or sample-and-hold - eliminating discrete opamp networks for sensor front-ends. |
| CapSense® on Any GPIO | Supports up to 62 self- or mutual-capacitance sensors using standard GPIOs with no dedicated pins or external components; enables touch interfaces on constrained PCBs. |
| Flexible Clock Tree | 12 programmable clock dividers routable to any peripheral or I/O; allows independent timing domains for USB, CAN, ADC sampling, and PWM generation without clock contention. |
| UDB-Based Peripheral Synthesis | 24 Universal Digital Blocks enable drag-and-drop creation of custom digital logic (e.g., PRS generators, CRC engines, quadrature decoders) - reducing BOM and layout complexity vs. fixed-function ICs. |
| Dual-Voltage I/O Domains | Four independent VDDIO rails allow simultaneous 1.8 V, 3.3 V, and 5 V logic interfacing on same device; avoids level shifters in multi-voltage systems like smart meters or PLC modules. |
Applications
| Industrial Sensor Node | Medical Vital Signs Monitor |
|---|---|
Use Scenario: Battery-powered wireless temperature/humidity/pressure node with local signal processing and CAN bus reporting. IC Role / Device Role / Timing Role: Central controller handling sensor ADC acquisition, CapSense® button interface, CAN message framing, and ultra-low-power sleep/wake scheduling. Use Value: Single-chip integration reduces bill-of-materials by 3+ ICs (ADC, CAN transceiver, microcontroller, opamp network) while enabling <200 nA hibernate current for multi-year battery life. |
Use Scenario: Portable ECG/SpO₂ monitor with analog front-end, LED driver control, and USB data upload to host PC. IC Role / Device Role / Timing Role: Mixed-signal SoC performing analog acquisition (delta-sigma ADC + PGA), optical pulse modulation (DAC + PWM), and USB HID-class data streaming. Use Value: On-chip opamps and SC/CT blocks condition weak biopotential signals; integrated USB eliminates external PHY, reducing EMI risk and certification effort. |
| Smart Home Thermostat | Automated Test Equipment (ATE) Front-End |
Use Scenario: HVAC controller with capacitive touch panel, ambient light sensing, relay/valve actuation, and Zigbee/Thread radio coexistence. IC Role / Device Role / Timing Role: Main MCU managing CapSense® UI, I²C sensor reads, PWM fan control, and RF interference-aware GPIO timing. Use Value: Independent I/O voltage domains isolate 3.3 V radio interface from 5 V relay drivers; programmable analog blocks replace discrete comparator circuits for light threshold detection. |
Use Scenario: Modular ATE channel card requiring precision voltage/current sourcing, fast digital pattern generation, and trigger synchronization. IC Role / Device Role / Timing Role: Reconfigurable test engine generating calibrated analog stimuli (DAC + PGA), capturing responses (ADC), and executing high-speed digital sequences (UDB-based PRS + TCPWM). Use Value: 24 UDBs synthesize custom waveform generators and protocol analyzers; 12 clock dividers enable sub-nanosecond timing resolution across stimulus, capture, and trigger domains. |
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 |
|---|---|---|---|
| CY8C3866AXI-063 | Higher memory (128 KB flash, 16 KB RAM), added USB HS support, 100-pin TQFP package; no boost regulator. | Better suited for USB-hosted data loggers requiring larger firmware footprint and higher bandwidth; lacks integrated boost converter for sub-1.8 V supply scenarios. | Select when USB host capability, larger code space, or extended I/O count (>72 pins) is required - not drop-in compatible due to package and power architecture differences. |
| STM32F303VCT6 | ARM Cortex-M4F core, 256 KB flash, 48 KB RAM, but fixed-function analog (no SC/CT blocks), no CapSense®, no UDB programmability. | Stronger floating-point performance for motor control algorithms, but requires external components for capacitive touch or custom analog signal chains. | Choose for deterministic DSP workloads where ARM ecosystem tooling outweighs need for analog/digital configurability; not suitable for CapSense® or mixed-signal rapid prototyping. |
Compared with CY8C3446LTI-073T, CY8C3866AXI-063 offers greater memory and USB bandwidth at the cost of boost regulation and pin compatibility, while STM32F303VCT6 trades PSoC's analog/digital flexibility for ARM performance and ecosystem - making CY8C3446LTI-073T optimal for cost-sensitive, ultra-low-power, highly integrated mixed-signal designs.
Availability
CY8C3446LTI-073T is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart home thermostats, and automated test equipment front-ends requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for CY8C3446LTI-073T 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 is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive MCUs, security ICs, and embedded control solutions with emphasis on energy efficiency and system reliability.
CY8C3446LTI-073T belongs to the PSoC® 3 family - designed specifically for ultra-low-power, highly integrated embedded control applications where analog signal conditioning, digital protocol handling, and flexible I/O routing must coexist on a single chip without external glue logic.
FAQ
Does CY8C3446LTI-073T support USB device enumeration without external crystal?
Yes. The device integrates an internal oscillator (IMO) qualified for USB 2.0 Full-Speed operation at 12 Mbps, certified under TID#40770053. It uses the IMO with internal trimming to meet USB timing jitter requirements, eliminating the need for an external 48-MHz crystal in most USB peripheral implementations.
What is the maximum number of CapSense® electrodes supported, and how is it achieved?
CY8C3446LTI-073T supports up to 62 CapSense® sensors using any GPIO pin - enabled by dedicated hardware scan engine, programmable IDAC current sources, and shield/sense routing within the analog interconnect. Electrode count scales with available GPIOs and scan time budget, not fixed peripheral allocation.
Can the boost regulator generate 5 V output from a 0.5 V input source?
Yes. The integrated boost regulator accepts input voltages as low as 0.5 V and delivers regulated outputs up to 5.0 V with typical efficiency of 85% at 10 mA load. This enables energy harvesting applications using single-cell NiMH, thin-film batteries, or piezoelectric sources.
Is the CAN controller compliant with ISO 11898-1 (data link layer) and does it require an external transceiver?
Yes. The on-die CAN controller fully implements ISO 11898-1, including bit timing, error handling, and message buffering (16 Rx, 8 Tx). However, physical layer compliance (ISO 11898-2) requires an external CAN transceiver - the device provides only the digital controller, not the differential driver/receiver circuitry.
CY8C3446LTI-073T 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, USB
- Peripherals:
- CapSense, DMA, POR, PWM, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 8K 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:
CY8C3446LTI-073T FAQ
1.How can I place an order for CY8C3446LTI-073T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3446LTI-073T 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 CY8C3446LTI-073T reliable?
The price and inventory of CY8C3446LTI-073T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3446LTI-073T is usually 5 days.
3.What payment methods are accepted for CY8C3446LTI-073T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3446LTI-073T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3446LTI-073T?
CY8C3446LTI-073T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3446LTI-073T 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 CY8C3446LTI-073T?
For technical support, including CY8C3446LTI-073T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3446LTI-073T requirements.
6.How does Aetrix verify that CY8C3446LTI-073T is sourced from the original manufacturer or authorized distributors?
All CY8C3446LTI-073T 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 CY8C3446LTI-073T meets industry standards.
7.What is the process for return or replacement of CY8C3446LTI-073T?
All CY8C3446LTI-073T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3446LTI-073T, 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 CY8C3446LTI-073T part is unused and in its original packaging.
Return procedure for CY8C3446LTI-073T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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