Intel 8085 microprocessor is the next generation of Intel 8080 CPU family. In addition to being faster than the 8080, the 8085 had the following enhancements:

• Intel 8085 had single 5 Volt power supply.
• Clock oscillator and system controller were integrated on the chip.
• The CPU included serial I/O port.
• Two new instructions were added to 8085 instruction set. The CPU also included a few undocumented instructions. These instructions were supposed to be a part of the CPU instruction set, but at the last moment they were left undocumented because they were not compatible with forthcoming Intel 8086.

For more details please refer Datasheet.