EmbeddedRelated.com
The 2026 Embedded Online Conference
CY8C3246LTI-128

IFXCY8C3246LTI-128

Infineon Technologies
8-bit Microcontrollers - MCU 64K Flash 50MHz 8051 1.71V to 5.5V
2,600 in stock

Overview

The CY8C3246LTI-128 is a PSoC 3 programmable system-on-chip that combines a high-performance 8051 core with flexible analog and digital peripheral logic. Operating at up to 50MHz, it features 64KB of Flash and integrated CapSense technology for advanced touch-sensing interfaces. The device is designed to bridge the gap between fixed-function MCUs and FPGAs by allowing hardware-level customization of peripherals.

Why Choose This Part

The PSoC architecture allows engineers to route any signal to any pin, significantly simplifying PCB layout and reducing BOM count. It provides a robust 1.71V to 5.5V operating range and includes 24 DMA channels to offload data movement tasks from the 8051 CPU core.

Applications

Capacitive Touch Interfaces
Utilizes dedicated CapSense hardware to implement buttons, sliders, and proximity sensors with high noise immunity.
Industrial Sensor Hubs
Aggregates data from multiple analog and digital sensors using its 12-bit ADC and flexible EBI/EMI connectivity.
LCD UI Controllers
Directly drives segment LCDs for low-power user interface displays in handheld instrumentation.
USB Peripheral Devices
Leverages the integrated Full-Speed USB controller for PC-connected peripherals and data logging tools.

Key Specifications

Speed 50MHz
RAM Size 8K x 8
Core Size 8-Bit
EEPROM Size 2K x 8
Peripherals CapSense, DMA, LCD, POR, PWM, WDT
Connectivity EBI/EMI, I2C, LINbus, SPI, UART/USART, USB
Mounting Type Surface Mount
Number of I/O 38
Core Processor 8051
Package / Case 68-VFQFN Exposed Pad
Data Converters A/D 16x12b; D/A 1x8b
Oscillator Type Internal
Program Memory Size 64KB (64K x 8)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 68-QFN (8x8)
Voltage - Supply (Vcc/Vdd) 1.71V ~ 5.5V

Getting Started

Development is supported through PSoC Creator, a unique IDE that allows for schematic-based peripheral configuration alongside standard C programming. For hardware evaluation, use the CY8CKIT-030 PSoC 3 Development Kit or connect via MiniProg3/4 for JTAG and SWD debugging.

Also Consider

CY8C4245LQI-483 IFXInfineon Technologies - Provides a more modern 32-bit ARM Cortex-M0 core while maintaining PSoC's flexible programmable digital and analog blocks.
The 2026 Embedded Online Conference