16 KB Flash, 24 MHz M8C — the PSoC1 mixed-signal sweet spot
The Infineon CY8C27643-24LTXI is an 8-bit PSoC1 microcontroller from the CY8C27xxx family, built around the proprietary M8C core running at 24 MHz. This is the mixed-signal tier of the PSoC1 lineup — the headline differentiator is the integrated data converter block: a 4-channel 14-bit ADC and a 4-channel 9-bit DAC, letting you handle analog sensor inputs and generate analog control outputs without an external converter IC.
44 I/O with I²C, SPI, UART — wired for sensor aggregation
The 44 I/O count is generous for a 48-pin package — only four pins are consumed by power and ground, leaving the rest configurable as digital I/O or analog inputs. On-chip peripherals include POR, PWM, and WDT, so external supervisor or watchdog ICs can be omitted in many applications.