Z80182
The Zilog Z80182 is an enhanced, faster version of the older Z80 and is part of the Z180 microprocessor family. It's nicknamed the Zilog Intelligent Peripheral Controller (ZIP). It's also fully static (the clock can be halted and no data in the registers will be lost) and has a low EMI option that reduces the slew rate of the outputs.
The Z80182 can operate at 33 MHz with an external oscillator for 5 volt operation, or at 20 MHz using the internal oscillator for 3.3 volt operation.
Read more about this topic: Zilog Z180