NEC V20
The NEC V20 (µPD70108) is an Intel 8088 pin-compatible processor that was manufactured by NEC and has an instruction set that is compatible with both the Intel 8080 and the Intel 80186 . The CPU consisting of 63,000 transistors (8086: 27,000) was manufactured in a 1.2 µm CMOS process (8086: 3 µm NMOS) and was suitable for 5 (NEC D70108C-5) to 16 MHz (NEC D70108HLM-16) specified. It ran around 30 percent faster than the i8088 at the same clock frequency. In contrast to the NMOS -based 8086, the V20 was manufactured using the power-saving CMOS process.
The NEC V20HL (μPD70108H) and the NEC V30HL (μPD70116H) are high-speed (up to a clock frequency of 16 MHz) and low-power versions of the V20 and V30.
The NEC V25 is a microcontroller version of the NEC V20.
The NEC V30 (μPD70116) is a version of the V20 that is pin-compatible with the Intel 8086 .
The NEC V40 processor family had an Intel 80186 compatible instruction set and an 8 bit data bus and, with peripheral components integrated in the housing, is suitable for the design of robust miniaturized microcontrollers .
The NEC V50 processor family had an Intel 80186 compatible instruction set and a 16 bit data bus and, with peripheral components integrated in the housing, is suitable for the design of robust miniaturized microcontrollers.
There were also the processors V60, V70 and V80. Their native instruction set was not x86 compatible, but could emulate the instruction set of an 80186 in hardware.
