This question is literally impossible to answer without knowing a specific part number (and manufacturer which is usually easy to determine because it is based off the part number). The 8051 was first used in the IBM type computer as the keyboard controller to send key presses to the CPU. It has since become an architecture that appears in a number of other places. There are several manufacturers that produce low cost and low power microcontrollers based upon the 8051 with other peripherals included in the same package. Because there are numerous 8051 controllers, there is no one standard for connecting them to power for each may design their controller to meet their own design guidelines.
Older 8051 microcontrollers usually require a 5 V power supply.
Newer 8051 microcontrollers are more likely to require a 3.3 V power supply.
The only way to tell is to read the part number off the chip and look up the manufacturer's data sheets for that part number.
Fortunately, most data sheets are online these days.
Intel
yes
2.4ma
to determine the state condition of microcontroller's input when microcontroller is reading the input port
8051 is an old microcontroller design. It has been updated and expanded into a family of microcontrollers manufactured by several companies. PIC is not a microcontroller, but is an extensive family of microcontrollers designed and manufactured by Microchip, Inc. Both are quite popular, and there are many other microcontrollers available.
The 8051 runs on +5vdc.
Intel
how many interrupts in 8051
The 8051 Microcontroller is a microcontroller ("chip") developed by Intel in 1980.
8051 family
yes
The at89c52 are ones that are more advanced. This means that they are programmable compared to the 8051 which is not. So this makes a really big difference.
avr is high speed cmpar to 8051.in 8051 there are less number of instructions
ne ebbba
2.4ma
You will need a 8051 device programmer that connect to a PC with software to drive the programmer
89c51 is an microcontroller of 8051 series it is an 8-bit device packed in 40-pin package.