PSoC 4 with CapSense and LCD drive — what the 48 MHz Cortex-M0 core buys you
The Infineon CY8C4245AZI-483 is a PSoC 4 MCU built around an ARM Cortex-M0 core clocked at 48 MHz, with 32 KB of Flash program memory and 4 KB of SRAM. It integrates CapSense capacitive touch sensing, LCD segment drive, and a full set of programmable analog and digital blocks — the hallmark of the PSoC architecture. The part is aimed at human-machine interface (HMI) applications such as touch-button panels, capacitive sliders, and simple graphic displays in industrial control panels, white goods, and building automation. The 48 MHz clock is fast enough to handle real-time capacitive scanning, LCD refresh, and communication protocol stacks without a separate co-processor. The 32 KB Flash and 4 KB SRAM are sized for moderate firmware loads — think a touch-sensor firmware with a few hundred lines of state-machine logic, not a full RTOS with a TCP/IP stack.
1.71 V to 5.5 V supply — single-rail or battery operation
The supply range spans 1.71 V to 5.5 V. The internal oscillator and brown-out detect circuitry keep the core stable across the full range.
Industrial temperature grade — -40°C to 85°C
Rated for -40°C to 85°C ambient, the CY8C4245AZI-483 suits outdoor telecom cabinets, unheated factory floors, and automotive cabin modules. The 48-LQFP package (7x7 mm body) is a standard footprint for hand-assembly and reflow, with 36 general-purpose I/O brought out.
Active lifecycle — no end-of-life risk for new designs
The part carries an Active lifecycle status, meaning Infineon continues to manufacture it without a planned discontinuation. For BOM planning, this removes the single-source risk that comes with NRND or EOL parts.