PSoC 1 CY8C20234-12SXIT — 8-bit M8C MCU for compact sensor and control nodes
The Infineon CY8C20234-12SXIT is an 8-bit microcontroller from the PSoC 1 CY8C20xxx family, built around the proprietary M8C core clocked at 12 MHz. It carries 8 KB of Flash program memory and 512 x 8 bytes of RAM, with an internal oscillator. The part is rated for -40°C to 85°C and operates from 2.4 V to 5.25 V. With 13 general-purpose I/O lines and serial interfaces for I²C and SPI, this MCU is sized for cost-sensitive applications such as simple sensor hubs, human-interface controllers, and basic actuator management in industrial or consumer equipment. The integrated peripherals — Low-Voltage Detect (LVD), Power-On Reset (POR), and Watchdog Timer (WDT) — reduce external component count and improve system reliability.
12 MHz core — what it means for your firmware timing
The M8C core at 12 MHz delivers throughput for polling loops, state machines, and serial communication at typical I²C and SPI bit rates. The internal oscillator means one less BOM line and no external load-capacitor pair.
Memory footprint: 8 KB Flash, 512 x 8 RAM
The 8 KB Flash is sufficient for small firmware images — bootloader, main control loop, and a modest lookup table. The 512-byte RAM (organized as 512 x 8) limits data buffering; a design streaming sensor readings over I²C will need to manage buffer sizes carefully. For applications that exceed this footprint, the CY8C29566-24AXIT from the PSoC 1 CY8C29xxx series offers a larger memory map and additional peripherals, though at a higher pin count and cost.
Package and footprint: 16-SOIC
Housed in a 16-SOIC package (3.90 mm body width), the CY8C20234-12SXIT uses a standard SOIC-16 land pattern. The Cut Tape variant is also available for prototyping or low-volume builds.
Lifecycle and sourcing reality
For BOM planning, there is no last-time-buy risk to model, and the part is suitable for both new designs and ongoing production.