48 MHz Cortex-M0 with integrated CapSense and LCD drive
The Infineon CY8C4245PVI-DS402T is a 32-bit ARM Cortex-M0 MCU from the PSOC 4 CY8C42xx-DS series, clocked at 48 MHz. It packs 32 KB of Flash program memory and 4K x 8 SRAM.
21 I/O in a 28-SSOP — board-area budget
The 28-SSOP package (5.30 mm body width) gives 21 general-purpose I/O lines. That footprint fits a two-layer PCB for a capacitive touch panel with four sensor inputs, a UART to a host controller, and an SPI interface to a display driver — with a few pins left for status LEDs and a pushbutton. The 0.209-inch (5.30 mm) width is the same as a standard SOIC-28, so existing land patterns often carry over with minor tweaks.
Peripherals that cut external BOM
On-chip CapSense eliminates the need for a separate touch controller in appliance and industrial HMI designs.
Connectivity options for industrial buses
The CY8C4245PVI-DS402T supports I²C, SPI, UART/USART, IrDA, LINbus, Microwire, SmartCard, and SSP. That covers most sensor and actuator links on a factory floor — LIN for automotive sub-systems, I²C for local sensor arrays, and UART for Modbus RTU gateways. The internal oscillator trims to 48 MHz, so no external crystal is needed for many applications, though an external clock can be fed in for tighter timing.
Lifecycle and compliance — no LTB risk
The CY8C4245PVI-DS402T is listed as Active in production with ROHS3 compliance. For new designs or production replenishment, this part is a safe call — no forced redesign horizon.