67 MHz 8051 core with programmable analog and digital blocks
The Infineon CY8C3666LTI-027 is an 8-bit 8051-based PSoC 3 microcontroller from the CY8C36xx family, clocked at 67 MHz. The part includes an internal oscillator, so no external crystal is required for basic operation. A standout feature is the on-chip data converter array: a 16-channel, 12-bit ADC and a 4-channel, 8-bit DAC. This allows the MCU to handle mixed-signal tasks — sensor conditioning, analog feedback loops, or simple audio output — without a separate analog front-end IC.