80C51 Core Variants and Vendors Overview
Simply the most sourced uC. Period.
The long proven 80C51 continues to add variants, and suppliers. Even Microchip now sell 80C51! (SST)
A couple of vendors now deliver Dual Core 8051's
With expanding QuadSPI memory choices, we also see the first C51's offering Execute-In-Place from 8 pin SPI memory
12 Bit ADC is moving to be more mainstream. Advanced Analog performance (16/20+ ADC bits) is available from Analog Devices, TI, SiLabs, Maxim, Nuvoton etc.
Small packages: 2mm(+)/3mm/4mm etc, and SO8/MSOP10/SO14/SO16 are now design choices.
Another trend sees C51's moving into system chips, as the on-chip controller.
USB 2.0 480MBaud, USB-OTG, Ethernet, Power Line Comms, and BlueTooth systems are
all seeing C51 cores.
Silabs and NXP drive the 80C51 in FLASH well under $1 and to 14/11/8pins
Single cycle 80C51 cores are expanding all the time.
On chip regulators, and low power, Calibrated Oscillators are also emerging trends.
Many far-east chip vendors and foundries are now backing the 80C51.