The Infineon CY8C24423A5-24PVXI is an 8-bit PSoC1 programmable system-on-chip built around the M8C core, running at 24 MHz. It integrates configurable analog and digital blocks, FLASH program memory, and 24 I/O lines in a 28-pin SSOP package. This part is intended for embedded control applications where on-chip programmability replaces external glue logic — think sensor interfaces, motor commutation, human-machine interfaces, and low-speed data acquisition in industrial or consumer environments.
The 24 MHz clock rate is the ceiling for the M8C core. At that speed, flash wait states need careful handling — the PSoC Designer toolchain sets them automatically, but if you're porting code from a slower variant, a hard fault on the first branch after a PLL switch is the typical failure.
Active lifecycle — no end-of-life worry
The 28-pin SSOP package (PVXI suffix) is a 5.3 mm body width, 0.65 mm pitch — a common footprint shared with other PSoC1 parts like the CY8C29466-24PVXI. The exposed paddle is not present on this package, so thermal dissipation relies on the leads. For a board rework technician: the scorch mark on a dead PSoC1 is usually around the VDD pin from a shorted regulator; check the 3.0 V rail first. The part is RoHS compliant (the 'XI' suffix confirms Pb-free and halogen-free).