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Infineon Technologies CY8C3246LTI-128
- Part No.:
- CY8C3246LTI-128
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 68-VFQFN Exposed Pad
- Datasheet:
-
CY8C3246LTI-128.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 68QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
CY8C3246LTI-128 from Infineon Technologies (acquired Cypress Semiconductor) is a programmable 8-bit PSoC® 3 system-on-chip integrating an enhanced 8051 CPU, configurable analog and digital peripherals, 64 KB flash, 8 KB RAM, and CapSense® support. It operates from 1.71–5.5 V at up to 50 MHz, features 24-channel DMA, USB 2.0 FS interface, and 48-QFN packaging - enabling single-chip sensor hub, industrial control, and human-interface designs.
For engineers reviewing the CY8C3246LTI-128 datasheet, CY8C3246LTI-128 pinout, CY8C3246LTI-128 application, or CY8C3246LTI-128 equivalent, key selection criteria include its 48-pin QFN footprint, integrated USBIO pins, 29 GPIOs with analog routing capability, and support for CapSense® touch sensing on all GPIOs.
Technical Context
The CY8C3246LTI-128 implements a single-cycle 8051 core running at up to 50 MHz with nested vector interrupt controller and 24-channel PHUB-based DMA. Its digital subsystem uses 24 Universal Digital Blocks (UDBs) to implement UART, SPI, I²C, PWM, CRC, PRS, and quadrature decoders - all dynamically routable to any I/O pin via the Digital System Interconnect (DSI).
Analog resources include an 8–12-bit Delta-Sigma ADC (±1 LSB INL, 66 dB SINAD), dual comparators, 8-bit DAC (1 MSPS VDAC / 8 MSPS IDAC), and 1.024 V ±1% internal reference. All GPIOs support CapSense® and segment LCD drive (up to 46×16), with SIO pins offering 25 mA sink, overvoltage tolerance, and hot-swap capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051, up to 50 MHz - enables real-time deterministic control with sub-μs interrupt latency. |
| Flash / RAM / EEPROM | 64 KB flash (with ECC), 8 KB SRAM, 2 KB EEPROM - supports field-upgradable firmware and persistent configuration storage. |
| ADC Performance | Delta-Sigma, 8–12-bit resolution, ±1 LSB INL, 66 dB SINAD - suitable for precision sensor signal acquisition without external signal conditioning. |
| Digital Peripherals | 4× TCPWM, 1× hardware I²C (1 Mbps), USB 2.0 FS (12 Mbps), 24 UDBs - allows concurrent high-speed communication and custom logic implementation. |
| I/O System | 29 GPIOs + 4 SIOs + 2 USBIOs; all GPIOs support CapSense®, LCD drive, and analog routing - eliminates need for external touch controllers or display drivers. |
| Power Management | 1.71–5.5 V operation; 200 nA hibernate mode (RAM retention); integrated boost converter (0.5 V input → 5 V output) - enables battery- and energy-harvesting applications. |
| Clock Sources | 3–24 MHz IMO (±2% @3 MHz), 4–25 MHz XTAL support, 50 MHz PLL, 32.768 kHz RTC crystal input - provides flexible timing for mixed-signal synchronization and low-power timekeeping. |
Pinout & Package
Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced with exposed pad connected to VSSD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O voltage domain supplies | Enable independent 1.2–5.5 V logic levels per pin group - eliminates external level shifters in multi-voltage systems. |
| P0[0]–P0[7], P1[0]–P1[7], P2[3]–P2[7] | Configurable GPIO/SIO | All support CapSense®, analog routing, LCD segment/com drive, and programmable drive strength - unified pin functionality reduces BOM count. |
| P15[0]/P15[1] | Crystal oscillator inputs (XO/XI) | Support 4–25 MHz external crystal - provides precise clock source for USB timing and real-time control loops. |
| P15[6]/P15[7] | USBIO (D+/D−) | Integrated USB 2.0 FS PHY with internal termination - enables direct USB connectivity without external transceiver or ESD protection components. |
| P1[3]/P1[0]/P1[2] | SWDIO/SWDCK/SWV | 2-wire Serial Wire Debug + SWV trace - allows full debug and printf-style logging using only three pins. |
| VBOOST | Boost regulator output | Delivers regulated 5 V from as low as 0.5 V input - powers external sensors, displays, or other peripherals from ultra-low-energy sources. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Subsystem | Delta-Sigma ADC with 66 dB SINAD and 1.024 V ±1% reference enables <1% total error in sensor front-end designs without calibration. |
| CapSense® on All GPIOs | Supports up to 62 self- or mutual-capacitance sensors using any GPIO - replaces dedicated touch ICs and reduces layer count in HMI PCBs. |
| UDB-Based Custom Logic | 24 Universal Digital Blocks allow implementation of protocol stacks (LIN, I²S), CRC engines, or state machines without FPGA or external logic. |
| Multi-Voltage I/O Domains | Four independent VDDIO rails permit simultaneous 1.8 V, 3.3 V, and 5 V interfaces - simplifies integration with legacy peripherals and mixed-voltage sensors. |
| Integrated USB 2.0 FS PHY | Full-speed USB interface with internal transceivers and pull-ups - eliminates external USB transceiver, saving >$0.30 BOM cost and 3 mm² board area. |
Applications
| Industrial Human-Machine Interface | Medical Sensor Node |
|---|---|
|
Use Scenario: Touch-enabled control panel for HVAC or PLC operator interface with LED status indicators and local data logging. IC Role / Device Role / Timing Role: Central controller managing CapSense® buttons, 12-bit ADC for temperature/humidity sensing, and USB for firmware updates and diagnostics. Use Value: Single-chip integration reduces bill-of-materials by 4–6 discrete ICs (touch controller, ADC, USB transceiver, voltage supervisor) while supporting field-upgradable UI logic. |
Use Scenario: Portable blood glucose meter with capacitive touch keys, electrochemical sensor interface, and USB data export to clinic PC. IC Role / Device Role / Timing Role: Signal acquisition hub performing 12-bit Delta-Sigma conversion of amperometric sensor current, driving LCD segments, and handling USB HID-class data transfer. Use Value: On-chip 1.024 V reference and ±1 LSB INL ADC ensure <2% measurement error across 0–50°C; integrated USB avoids external PHY qualification. |
| Energy-Harvesting IoT Endpoint | Automotive Body Control Module |
|
Use Scenario: Solar- or thermal-harvested wireless sensor node monitoring door/window status, ambient light, and temperature in smart building infrastructure. IC Role / Device Role / Timing Role: Ultra-low-power system controller using 200 nA hibernate mode, internal boost converter (0.5 V input), and wake-on-CapSense®/GPIO events. Use Value: Direct harvesting from sub-1 V sources eliminates external DC-DC stages; 29 GPIOs enable native connection of reed switches, photodiodes, and thermistors without glue logic. |
Use Scenario: Interior lighting control module managing RGB LED dimming, seat position sensing via potentiometer, and LIN bus communication in automotive cabin electronics. IC Role / Device Role / Timing Role: Mixed-signal controller executing PWM dimming (TCPWM), analog pot reading (ADC), and LIN 2.0 protocol stack (UDB-implemented) with CAN-compatible timing margins. Use Value: UDB-based LIN master eliminates external transceiver and microcontroller; SIO pins tolerate 12 V transients on LIN bus lines without clamping diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3247LTI-144 | 68-QFN package, 48 GPIOs, same core/peripherals but higher I/O count and larger flash (64 KB) and RAM (8 KB) - identical architecture and toolchain compatibility. | Required when >29 GPIOs or additional analog routing paths are needed for complex sensor fusion or multi-display systems. | Select for scalability beyond 48-pin footprint; retains full PSoC Creator™ project compatibility and debug interface. |
| CY8C4046LQI-SC45 | PSoC 4 (ARM Cortex-M0+) variant; lower power (1.71–5.5 V), 32 KB flash, 4 KB RAM, no USB PHY, no boost converter - different architecture and toolchain. | Suitable for cost-sensitive, non-USB, battery-only applications where ARM ecosystem and CMSIS libraries are preferred over 8051 legacy codebase. | Choose only if migrating to ARM-based firmware development; not drop-in compatible due to peripheral register map and USB/boost absence. |
Compared with CY8C3246LTI-128, the CY8C3247LTI-144 offers pin-compatible expansion for higher I/O density, while the CY8C4046LQI-SC45 trades USB/boost capability for ARM toolchain alignment - making the CY8C3246LTI-128 optimal for USB-connected, energy-harvesting, or CapSense®-centric designs requiring minimal external components.
Availability
CY8C3246LTI-128 is available at Aetrix Electronics and suitable for industrial HMI, medical sensor nodes, energy-harvesting IoT endpoints, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for CY8C3246LTI-128 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 programmable analog-digital SoCs for embedded control and sensing applications.
The CY8C32 series belongs to the PSoC® 3 platform, designed specifically for cost-sensitive, ultra-low-power, mixed-signal applications requiring high peripheral flexibility without external components - targeting industrial automation, portable medical devices, and smart home interfaces.
FAQ
Does CY8C3246LTI-128 support USB device enumeration without external components?
Yes. The part integrates a full-speed USB 2.0 physical layer (PHY) with internal 1.5 kΩ pull-up resistor on D+, ESD protection, and differential transceivers. When powered and configured with standard USB descriptors in firmware, it enumerates as a CDC, HID, or vendor-class device on host systems without external transceivers, resistors, or protection diodes.
Can all 29 GPIOs be used simultaneously for CapSense® sensing?
Yes. The device supports up to 62 capacitive sensing channels, and all GPIOs - including those shared with analog peripherals or USBIO - can be configured as CapSense® electrodes. Routing is managed through the analog interconnect matrix, and scanning is handled by dedicated hardware blocks that operate independently of CPU load.
What is the minimum supply voltage required to operate the internal boost converter?
The boost converter accepts input voltages as low as 0.5 V and delivers a regulated 5.0 V output. It remains functional down to 0.5 V input even when main VDDD/VDDA rails are unpowered - enabling operation from single-cell alkaline, NiMH, or energy-harvesting sources before system power-up sequencing completes.
Is the 8051 core in CY8C3246LTI-128 binary-compatible with standard 8051 instruction sets?
Yes. It executes the full MCS-51 instruction set with identical opcodes and addressing modes. Differences are limited to enhanced performance (single-cycle execution vs. 12-clock cycles), expanded memory map (64 KB flash, 8 KB RAM), and added peripherals - all accessible via standard Keil C51 or SDCC toolchains without assembly-level modification.
CY8C3246LTI-128 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, USB
- 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-128 FAQ
1.How can I place an order for CY8C3246LTI-128 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3246LTI-128 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-128 reliable?
The price and inventory of CY8C3246LTI-128 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3246LTI-128 is usually 5 days.
3.What payment methods are accepted for CY8C3246LTI-128?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3246LTI-128 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3246LTI-128?
CY8C3246LTI-128 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3246LTI-128 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-128?
For technical support, including CY8C3246LTI-128 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3246LTI-128 requirements.
6.How does Aetrix verify that CY8C3246LTI-128 is sourced from the original manufacturer or authorized distributors?
All CY8C3246LTI-128 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-128 meets industry standards.
7.What is the process for return or replacement of CY8C3246LTI-128?
All CY8C3246LTI-128 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3246LTI-128, 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-128 part is unused and in its original packaging.
Return procedure for CY8C3246LTI-128:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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