The ChipList, by Adrian Offerman; The Processor Portal

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2  4004 - 8085 processors

2.1  Introduction

2.2  Intel i4004 processor

Identification


Model name: i4004.
Supplier: Intel.
Component class: CPU.

Architecture


4 bit data bus.
12 bit address bus (multiplexed).
Separate address space for instructions and data (Harvard architecture).

Physics


Manufacturing technology: PMOS.

Number of transistors: 2250.

Die size: 24 mm2.

Packaging: 16 pin CerDIP.

Dates


Introduction date: 1970.


First microprocessor ever built.


2.3  Intel i4040 processor

Identification


Model name: i4040.
Supplier: Intel.
Component class: CPU.

Compatibility


Intel i4004 CPU with extra features:

  • more instructions,
  • interrupt support.

Architecture


4 bit data bus.
12 bit address bus (multiplexed).
Separate address space for instructions and data (Harvard architecture).

Physics


Manufacturing technology: PMOS.

Packaging: 24 pin CerDIP.

Dates


Introduction date: 1972.


2.4  Intel i8008 processor

Identification


Model name: i8008.
Supplier: Intel.
Component class: CPU.

Architecture


8 bit data bus.
14 bit address bus (multiplexed).
Separate address space for instructions and data (Harvard architecture).

Clock speed


Clock speed
300 kHz

Physics


Manufacturing technology: PMOS.

Number of transistors: 3300.

Packaging: 18 pin CerDIP.

Dates


Introduction date: April 1972.


2.5  Intel i8080/i8080A processor

Identification


Model name: i8080/i8080A.
Supplier: Intel.
Component class: CPU.

Generation


Generation: 8080.

Compatibility


Intel i8008 CPU with stack.

Architecture


8 bit data bus.
16 bit address bus.
Separate address space for instructions and data (Harvard architecture).

Clock speed


Model Manufacturing technology Number of transistors Introduction
Intel i8080 CPU PMOS 4500 1973
Intel i8080A CPU NMOS 4000 1976

Clock speed


Clock speed Model Compatibility Periphery Manufacturing technology
2 MHz Intel i8080 CPU     PMOS
2.67 MHz Intel i8080A-2 CPU     NMOS
3.125 MHz Intel i8080A-1 CPU     NMOS
  Intel iM8080A CPU   military (-55 - 125 °C)  

Physics


Packaging: 40 pin CerDIP.

Dates


Introduction date: April 1974.


2.6  Zilog Z80 processor

Identification


Model name: Z80.
Supplier: Zilog.
Component class: CPU.

Generation


Generation: 8080.

Compatibility


Intel i8080 CPU upward instruction compatible.

Not Intel i8080 CPU pin compatible.

Clock speed


Clock speed Manufacturing technology
2.5 MHz NMOS
4 MHz NMOS
6 MHz NMOS
8 MHz NMOS
10 MHz

Physics


Packaging: 40 pin CerDIP.

Dates


Introduction date: 1976.


2.7  Intel i8085A/i8085AH processor

Identification


Model name: i8085A/i8085AH.
Supplier: Intel.
Component class: CPU.

Generation


Generation: 8080.

Compatibility


Intel i8080 CPU upward instruction compatible.
Extra instructions:

  • SIM (Set Interrupt Mask)
  • RIM (Read Interrupt Mask)

Extra interrupt lines, including NMI (Non-Maskable Interrupt).

Architecture


8 bit data bus.
16 bit address bus.
Data and address bus are multiplexed.
Separate address space for instructions and data (Harvard architecture).

Clock speed


Clock speed Model Periphery Manufacturing technology
3 MHz Intel i8085A   NMOS
  Intel iM8085A CPU military (-55 - 125 °C) NMOS
5 MHz Intel i8085AH-2 CPU   HMOS
6 MHz Intel i8085AH-1 CPU   HMOS
  Intel iM8085AH CPU military (-55 - 125 °C) HMOS

Physics


Number of transistors: 6200.

Packaging: 40 pin CerDIP.

Dates


Introduction date: 1976.


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