67 MHz Cortex-M3 with programmable analog and CapSense
The CY8C5668LTI-LP014 runs an ARM Cortex-M3 core at 67 MHz — enough headroom for a sensor fusion loop or a USB stack with protocol overhead, without pushing the core to its ceiling. 256 KB of on-chip flash and 64 KB of SRAM leave room for a real-time OS and application buffers, while the 2 KB EEPROM stores calibration constants without wearing the flash. Built-in CapSense, DMA, LCD drive, POR, PWM, and WDT peripherals reduce external component count. The 2x12-bit ADC and 4x8-bit DAC handle mixed-signal conditioning on a single die.
The 68-QFN (8x8 mm) package with exposed pad demands a thermal via array under the paddle to pull heat into the ground plane — factor that into the PCB stack-up. The internal oscillator eliminates an external crystal for most applications, though USB operation typically needs the external clock for jitter compliance.
Active production — no obsolescence risk
For new designs the part is safe to commit; for existing BOM lines, the active status means lead times are standard and multi-source distribution is available.
Connectivity and I/O for system integration
38 I/O lines bring out I²C, SPI, UART/USART, LINbus, and USB — enough for a sensor hub with a display and a host link. The USB peripheral is full-speed device/host/OTG; confirm the external crystal requirement for USB in your design.