The DS89C450-MNL from Analog Devices Inc./Maxim Integrated is an 8051 89C microcontroller (MCU) Integrated Circuit with an 8-bit architecture, 33 MHz, 64 KB (64K x 8) flash memory, in a 40-PDIP package.
The DS89C450-ENL from Analog Devices Inc./Maxim Integrated is an 8-bit 8051 89C microcontroller Integrated Circuit rated at 33 MHz with 64KB (64K x 8) flash memory, in a 44-TQFP (10x10) package.
The DS89C450-MNG from Analog Devices Inc./Maxim Integrated is an 8051 89C microcontroller (MCU) Integrated Circuit with an 8-Bit core, 25 MHz clock, 64 KB (64K x 8) flash memory, in a 40-PDIP package.
The DS89C450-QNL from Analog Devices Inc./Maxim Integrated is an 8051 microcontroller Integrated Circuit with 8-bit architecture, 33 MHz operation, 64KB (64K x 8) flash memory and a 44-PLCC package measuring 16.59x16.59.
The DS89C450-QNG from Analog Devices Inc./Maxim Integrated is an 8051 89C microcontroller with 8-bit architecture, 25 MHz clock, 64 KB (64K x 8) flash memory, in a 44-PLCC (16.59x16.59) package.
The DS89C450-ENG+ from Analog Devices Inc./Maxim Integrated is an 8-bit 8051 89C microcontroller Integrated Circuit running at 25 MHz with 64 KB (64K x 8) flash memory, in a 44-TQFP (10x10) package.