Z80

Has been designed by the same responsible persons as the 8080 who left Intel to found Zilog (Federico Faggin, Masatoshi Shima); one of the most popular microprocessors; although the Z80 was the processor with the most enhanced design, Zilog was not able to push the market by means of a strong sales and marketing department as Intel did; so Zilog lost the 8-bit and 16-bit race; nevertheless the Z80 is the best-selling microprocessor in history

N-Channel MOS technology or C-Channel MOS technology; enhancement of 8080A; single +5 V power supply;  instruction set includes all instructions of 8080 as a subset; no pin compatibility to 8080; clock logic within CPU; single clock signal;  

4 to 20 MHz
Z80: 2.5 MHz
Z80A: 4 MHz
Z80B: 6 MHz
Z80H: 8 MHz

Manufactured Mostek devices

Mostek MK3880P-4	NEC D780C	NEC  uPD70008C	Sharp LH0080	Nintendo DMG-CPU A
40 pin CERDIP gold top	40 pin DIP	40 pin DIP	40 pin DIP	80 pin QFP
-	-	-	-	Z80 clone manufacturer unknown

SGS-Ates Z 80	SGS-Ates Z 80 A	Toshiba TMPZ84C00P	USSR KR 1858 VM3	USSR T34VM1
40 pin CERDIP grey traces	40 pin CERDIP grey traces	40 pin DIP	40 pin DIP	40 pin CERDIP silver top
N-channel PLANOX® silicon gate ion-implanted MOS technology		-	Z80 clone of USSR	Z80 clone of USSR

further eastern clones (see also section "eastern microprocessors" --> U880D)

Z80-SIO:    Serial Input / Output Controller
Z80-CTC:   Counter Timer Circuit
Z80-DMA:  Direct Memory Access Controller
Z80-PIO:    Parallel Input / Output
Z80-DART: Dual Asynchronous Receiver / Transmitter
Z80-SART: Single Asynchronous Receiver / Transmitter