The Cypress CY8C21345-12PVXE is an 8-bit PSoC1 microcontroller built around the M8C core, clocked at 12 MHz with 8 KB of on-chip Flash program memory. It belongs to the CY8C21xxx family, Infineon's (formerly Cypress) programmable-system-on-chip line that combines a microcontroller core with configurable analog and digital blocks on a single die.
28-pin SSOP – rework-friendly and board-space conscious
The 28-pin SSOP package (Shrink Small Outline Package) is a surface-mount footprint with 0.65 mm lead pitch. It is hand-solderable with a fine-tipped iron and rework-friendly under hot air – the leads are exposed and easy to inspect. The package's low profile (typically 1.75 mm seated height) suits tight enclosures.
The part is RoHS-compliant (the 'E' suffix in the order code indicates lead-free / RoHS).
Integrated peripherals – what the on-chip blocks save you
The CY8C21345-12PVXE integrates a Low-Voltage Detect (LVD), Power-On Reset (POR), Pulse-Width Modulator (PWM), and Watchdog Timer (WDT) on-chip. That eliminates the need for external supervisor ICs, reset generators, or PWM controllers in many simple control loops. The internal oscillator means no external crystal or ceramic resonator is required for the 12 MHz core clock – just a single supply rail at 4.75 V nominal. For a motor-fan controller, a heater sequencer, or a sensor hub, this part can replace a handful of discrete components.