The MKM14Z64ACHH5 from NXP USA Inc. is an ARM® Cortex®-M0+ Kinetis KM microcontroller Integrated Circuit with single-core 32-bit architecture, 50 MHz clock speed and 64 KB (64K x 8) flash memory, in a 44-MAPLGA package (5x5).
The MKM14Z64CHH5 from NXP USA Inc. is an ARM Cortex-M0+ Kinetis KM 32-bit single-core microcontroller Integrated Circuit running at 50 MHz, with 64KB (64K x 8) flash memory in a 44-MAPLGA (5x5) package.