64 MHz 8-bit MCU with integrated analog and LINbus
The Microchip PIC18F46Q43-I/MP is an 8-bit MCU from the PIC® XLP™ 18F family, built around a PIC core running at 64 MHz.
64 MHz core vs. 32 MHz siblings — where the speed matters
At 64 MHz, this part runs twice the clock of the PIC16LF1559 (32 MHz) and the 16-bit PIC24FJ256GA106 (32 MHz). That extra headroom tightens timing for software UART bit-banging, PID control loops, or protocol parsing. The 36 I/O pins — versus 17 on the PIC16LF1559 — give room for parallel sensor banks or a parallel LCD databus without a port expander.
Microchip lists the PIC18F46Q43-I/MP as Active.
40-QFN exposed pad — layout and thermal handling
The pad is electrically connected to VSS — confirm that in your layout so it doesn't short to an isolated island. The internal oscillator starts up without an external crystal, but if you need tighter timing, the part supports an external clock source.