8-bit Microprocessors


8008

Manufacturer Intel Corp. mask
Category 8-bit microprocessor 499 kB
Introduction December 1971
History

The specification during the development period was 1201

In 1972 Intel introduced the second microprocessor. Again this chip was produced for a special customer related contract. The client was Computer Terminals Corporation (Datapoint). CTC intended to use the chip for a server named CTC 2200. Since the 8008 was too slow CTC refused the chip. Intel decided to introduce the chip into the market by itself and thus encouraged the processor market. CTC was allowed to cancel the contract. In return CTC had to let Intel have the right to commerzialize the chip.

It found applications in byte-oriented end products such as terminals and computer periphals where its instruction execution (20 micro-seconds), general purpose organization and instruction set matched the requirements of these products.

Based on the 8008 Intel developed an evaluation tool, called Intellec 4, which enabled programmers  faster and easier programm developments.

Technology

Single chip fourteen-volt P-Channel MOS 8-bit parallel central processor unit (for MCS-8 microcomputer system). That is, the device requires +5 and –9 volt power supplies, for a total potential of 14 volts. This process is also used to produce the 1101 (256 x 1 RAM) and the 1103 (1024 x 1 Dynamic RAM). A similar process is used in the production of the 1702A (256 x 8 PROM). The 8008 used standard semiconductor ROM and RAM and, for the most part, TTL components for I/O and general interface. It found applications in byte-oriented end products such as terminals and computer periphals where its instruction execution (12.5 to 20 micro-seconds), general purpose organization and instruction set matched the requirements of these products.

Max. clock frequency 8008: 0.5 MHz
8008-1: 0.8 MHz

Examples






Package
Intel
8008
Intel
C8008
Intel
C8008-1
Intel
C8008-1
 
18 PIN CERDIP 18 PIN CERDIP 18 PIN CERDIP 18 PIN CERDIP
ground strap


Examples






Package

Comment
 
Intel
C8008-1 / 1820-1221
Intel
D8008
Intel
D8008-1
18 PIN CERDIP 18 PIN CERDIP 18 PIN CERDIP
manufactured for HP
(HP house marking)
- -


Second source devices





Package
 
Microsystems International
MF 8008
Microsystems International
MF 8008 R
Microsystems International
MF 8008-1R
Siemens
SAB 8008-1C
Siemens
SAB 8008-1D
18 PIN CERDIP
ground strap
18 PIN CERDIP
ground strap
18 PIN CERDIP
ground strap
18 PIN CERDIP 18 PIN CERDIP

Microsystems International Limited (MIL) was a canadian company for telecommu-
nication equipment. The first product built in licence was 1103.



Clone





Package


Comment
 
MME
U 808 D

included in small GDR computer such as K 1001 and K 1003; manufactured in N-Channel MOS technology; comparable to Intel 8008

18 pin DIP

register structure

pin layout

 

Second source Microsystems International, MME, Siemens
Peripherals 8205: Decoder, 1 of 8
8212: 8-bit Input / Output Port
8214: Priority Interrupt Control
8216: Bidirectional Bus Driver
8226: Bidirectional Bus Driver
8251: Programmable Communication Interface
8253: Programmable Interval Timer
8255: Programmable Peripheral Interface
8279: Keyboard Display Controller