Datasheet external clock (ADCLK) to operate the dynamic A/D conversion sequence. The. MC145051 has the same pin out as the 8-bit MC145041 which has an internal. An M68HC05. MCU without an SPI must interface to the MC145051 using a software The MC145051 is a ratiometric 10-bit ADC providing 11 analog channels. Refer to the. MC145053 data sheet for specific feature and timing information. The Motorola MC145051 is identical to the MC145053 except that it provides 11. The MC145050 and MC145051 are 10-bit converters; whereas, the sources to perform the conversion; the MC145041 and MC145051 use internal RC os-.