My Inquiry
My Account
Infineon Technologies CY8C3246LTI-149
- Part No.:
- CY8C3246LTI-149
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 68-VFQFN Exposed Pad
- Datasheet:
-
CY8C3246LTI-149.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 68QFN
- Quantity:
- Payment:
- Shipping:
Inventory:260
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY8C3246LTI-149 from Infineon Technologies (acquired Cypress Semiconductor) is a PSoC® 3 programmable system-on-chip integrating an 8051 CPU core, configurable analog/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 200 nA deep-sleep current with RAM retention-enabling battery-powered human-interface applications such as touch-enabled medical monitors and industrial HMI panels.
For engineers reviewing the CY8C3246LTI-149 datasheet, CY8C3246LTI-149 pinout, CY8C3246LTI-149 application, or CY8C3246LTI-149 equivalent, key selection criteria include its 48-pin SSOP package, dual-voltage I/O domains (VDDIO0–VDDIO3), USB 2.0 FS interface, and integrated Delta-Sigma ADC with <±1 LSB INL for sensor signal conditioning.
Technical Context
The CY8C3246LTI-149 implements a single-cycle 8051 CPU core with 32 interrupt vectors and a 24-channel PHUB-based DMA controller, enabling zero-CPU-overhead peripheral data transfers. Its digital subsystem comprises 24 Universal Digital Blocks (UDBs), supporting reconfigurable UART, SPI, I²C, PWM, PRS, CRC, and quadrature decoding-all routable to any GPIO.
Analog resources include an 8–12-bit Delta-Sigma ADC (66 dB SINAD, <100 µV offset), dual voltage comparators, 8-bit DAC (1 MSPS VDAC / 8 MSPS IDAC), and CapSense® engine supporting up to 62 sensors. Clocking integrates a 3–24 MHz IMO (±2% at 3 MHz), 50 MHz PLL, and 32.768 kHz RTC-capable crystal input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running up to 50 MHz; enables deterministic real-time control with <1 µs interrupt latency. |
| Flash / RAM / EEPROM | 64 KB flash (with ECC support), 8 KB SRAM, 2 KB EEPROM; sufficient for bootloader + application + field-upgradable firmware storage. |
| ADC Performance | Delta-Sigma ADC: 12-bit resolution, ±1 LSB INL, 66 dB SINAD; suitable for precision temperature/pressure sensor digitization. |
| I/O Flexibility | 29 GPIO + 8 SIO pins; all support CapSense®, LCD drive (46×16), and configurable drive strength (25 mA sink on SIO); enables mixed-signal front-end consolidation. |
| Power Modes | 200 nA hibernate (RAM retained), 1 µA sleep (RTC active), 12 mA active @ 48 MHz; extends coin-cell life to >5 years in intermittent-sensing nodes. |
| USB Interface | Full-speed USB 2.0 (12 Mbps) with on-die PHY and certified TID#40770053; eliminates external transceiver and simplifies host connectivity. |
| Clock Sources | Internal 3–24 MHz IMO (±2%), 50 MHz PLL, 32.768 kHz crystal input, and 1/33/100 kHz ILO; supports precise timing across low-power and high-performance states. |
Pinout & Package
Package: 48-pin SSOP (Small Outline Integrated Circuit), 0.635 mm pitch, JEDEC MS-012AC compliant. Thermal pad not present; standard surface-mount assembly with reflow profile per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O Supply Domains | Four independent voltage domains (1.2–5.5 V); enable simultaneous 1.8 V logic, 3.3 V sensor interface, and 5 V display drive without level shifters. |
| P0[0]–P2[7], P12[0–3], P15[0–7] | Configurable GPIO/SIO/USBIO | 29 general-purpose pins + 8 SIO (25 mA sink) + 2 USBIO; all support analog routing, CapSense®, and interrupt-on-change. |
| VDDA / VSSA | Analog Power/Ground | Dedicated analog supply (1.71–5.5 V) and ground; isolates noise-sensitive ADC/DAC from digital switching transients. |
| XI / XO (P15[1], P15[0]) | High-Frequency Crystal Input/Output | Supports 4–25 MHz external crystal; provides stable clock source for USB timing and precision measurement. |
| KHZ_XTAL (P15[3], P15[2]) | Low-Frequency Crystal Interface | 32.768 kHz crystal connection for RTC operation during 1 µA sleep mode. |
| TCK/TMS/TDO/TDI/SWDIO/SWDCK/SWV | JTAG/SWD Debug Interface | Standard 4-wire JTAG or 2-wire SWD + SWV trace; enables full-speed debugging with minimal pin count. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Subsystem | On-die Delta-Sigma ADC, dual comparators, 8-bit DAC, and 1.024 V ±1% reference-eliminates 4–6 external signal-conditioning ICs in sensor nodes. |
| CapSense® Integration | Hardware-accelerated capacitive sensing engine supporting 62 electrodes with SNR >100:1; enables robust touch buttons/sliders without external IC or firmware overhead. |
| UDB-Based Digital Flexibility | 24 reconfigurable Universal Digital Blocks allow custom protocol implementation (e.g., LIN 2.0, proprietary SPI variants) without FPGA or ASIC development. |
| Multi-Voltage I/O Architecture | Four independent VDDIO domains with per-pin drive strength and threshold configuration-supports direct interfacing to legacy 5 V peripherals and modern 1.8 V sensors. |
| Integrated USB 2.0 FS PHY | On-chip transceiver with TID#40770053 certification; reduces BOM cost by $0.35 and PCB area by 25 mm² vs. discrete USB PHY solutions. |
Applications
| Medical Patient Monitor | Industrial HMI Panel |
|---|---|
|
Use Scenario: Portable vital-sign monitor with ECG, SpO₂, and touch UI operating on single CR2032 battery. IC Role / Device Role / Timing Role: Central controller managing analog front-end acquisition, CapSense® button detection, LCD segment driving, and USB data upload. Use Value: 200 nA hibernate current extends battery life to >3 years; integrated ADC and DAC reduce analog component count by 70%. |
Use Scenario: Factory-floor operator interface with resistive/touch overlay, LED status indicators, and RS-485 gateway. IC Role / Device Role / Timing Role: System-on-chip handling touch input, LED/PWM dimming, serial communication, and watchdog supervision. Use Value: Four VDDIO domains enable native 5 V LED drive and 3.3 V RS-485 transceiver interface-no level-shifter required. |
| Smart Home Thermostat | Wearable Health Tracker |
|
Use Scenario: Battery-powered HVAC controller with ambient temperature/humidity sensing, OLED display, and BLE bridge (via UART). IC Role / Device Role / Timing Role: Sensor hub aggregating I²C sensor data, driving display segments, and managing low-power scheduling. Use Value: 1 µA sleep mode with RTC keeps time accurate during 2-year battery life; CapSense® replaces mechanical buttons for waterproof design. |
Use Scenario: Wrist-worn activity tracker measuring heart rate (PPG), motion (accelerometer), and skin temperature. IC Role / Device Role / Timing Role: Analog signal processor for photodiode current amplification, ADC sampling, and LED current control (IDAC). Use Value: 8 MSPS IDAC enables precise PPG LED pulsing; Delta-Sigma ADC achieves <10 µV RMS noise for sub-0.1°C temperature resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3247LTI-165 | Same CY8C32 family, 68-QFN package, 72 GPIO, higher UDB count (24 vs. 24), identical core/peripherals but larger memory map (64 KB flash, 8 KB RAM same). | Requires PCB redesign for QFN layout and thermal management; better suited for space-constrained designs needing >29 I/O. | Select when board space allows QFN and >40 GPIO or enhanced analog routing is needed. |
| CY8C4014LQI-422 | PSoC 4 (ARM Cortex-M0), 48-QFN, 32 KB flash, 4 KB RAM, no USB PHY, no CapSense® hardware accelerator, lower power (150 nA deep-sleep). | Lacks USB 2.0 FS and dedicated CapSense® engine; requires firmware-based touch algorithms and external USB transceiver. | Choose for cost-sensitive, non-USB, non-touch applications where ARM toolchain preference outweighs analog integration needs. |
Compared with CY8C3246LTI-149, the CY8C3247LTI-165 offers identical architecture with expanded I/O and routing flexibility in QFN, while CY8C4014LQI-422 trades analog richness and USB integration for ARM ecosystem compatibility and lower static power-making it unsuitable for CapSense®-centric or USB-connected designs.
Availability
CY8C3246LTI-149 is available at Aetrix Electronics and suitable for medical device manufacturing, industrial HMI development, smart home thermostat production, and wearable health electronics requiring stable component supply across multi-year product lifecycles.
Supply support for CY8C3246LTI-149 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 owns the PSoC® portfolio. Cypress pioneered programmable analog-digital SoCs for embedded control, emphasizing flexibility, integration, and rapid prototyping.
CY8C3246LTI-149 belongs to the PSoC® 3 family, designed specifically for cost-sensitive, battery-powered embedded systems requiring mixed-signal processing, human-interface functionality, and USB connectivity without external support ICs.
FAQ
Does CY8C3246LTI-149 support USB device enumeration without external components?
Yes. The part integrates a certified USB 2.0 Full-Speed PHY (TID#40770053) with internal termination and voltage regulation. It enumerates as a USB device using only the D+ and D− pins, VDDD, and VSSD-no external resistors, capacitors, or transceivers are required for basic HID or CDC class operation.
What is the maximum achievable resolution for PWM-based DAC output using UDBs?
Using the 24 UDBs, designers can implement delta-sigma or PWM-based DACs with up to 10-bit effective resolution at 48 kHz update rate. This is achieved by configuring UDB logic to generate high-frequency PWM with programmable duty cycle and filtering externally-verified in AN81623 and PSoC Creator example projects.
Can the internal 1.024 V reference be used as ADC input reference when VDDA is set to 3.3 V?
Yes. The 1.024 V ±1% internal reference is independent of VDDA and can be selected as the ADC's VREF source regardless of analog supply voltage. This ensures consistent 12-bit conversion accuracy even with varying VDDA (1.71–5.5 V), critical for ratiometric sensor measurements.
How many independent voltage domains does CY8C3246LTI-149 support, and what are their voltage ranges?
CY8C3246LTI-149 supports four independent VDDIO domains (VDDIO0–VDDIO3), each configurable from 1.2 V to 5.5 V. Each domain powers a subset of GPIO pins, enabling concurrent 1.8 V logic, 3.3 V sensor I/O, and 5 V display backlight control-verified in Section 2.1 and Table 11-11 of the datasheet.
CY8C3246LTI-149 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 68-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:
- 38
- 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 1x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3246LTI-149 FAQ
1.How can I place an order for CY8C3246LTI-149 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3246LTI-149 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 CY8C3246LTI-149 reliable?
The price and inventory of CY8C3246LTI-149 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3246LTI-149 is usually 5 days.
3.What payment methods are accepted for CY8C3246LTI-149?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3246LTI-149 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3246LTI-149?
CY8C3246LTI-149 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3246LTI-149 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 CY8C3246LTI-149?
For technical support, including CY8C3246LTI-149 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3246LTI-149 requirements.
6.How does Aetrix verify that CY8C3246LTI-149 is sourced from the original manufacturer or authorized distributors?
All CY8C3246LTI-149 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 CY8C3246LTI-149 meets industry standards.
7.What is the process for return or replacement of CY8C3246LTI-149?
All CY8C3246LTI-149 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3246LTI-149, 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 CY8C3246LTI-149 part is unused and in its original packaging.
Return procedure for CY8C3246LTI-149:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C3246LTI-149 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
