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Intel 4040

General

General Information

The 4040 is an enhanced follow-on processor to the Intel 4004.

The 4040 was used primarily in games, test, development, and control equipment. The package of the 4040 is more than twice as wide as the 4004 and has 24 pins vs. the 16 of the 4004. The 4040 added 14 instructions, larger stack (8 level), 8K program space, 8 more registers, and interrupt abilities (including shadows of the first 8 registers).

The 4040 family is also referred to as the MCS-40.

Production

4 Qtr, 1974

Designers Ted Hoff, Federico Faggin, Stan Mazor, Masatoshi Shima

Architecture

Type Data Word Address Space Clock Instruct- ions Assists Reg’s GP Reg’s Math Reg’s Index IO Ports   Stack Interrupts Memory
PMOS,CPU  4-bit 8Kb program,5Kb data 740kHz,2 Phase 60 BCD 0 1 24 4-bit NA 8×12 NA NA

Packages

Chip Name

Package

On-Chip Identification

Picture

General Comments

C4040

White/Gold CerDIP, 24-pin

C4040

C4040  

D4040

Gray Ceramic, 24-pin DIP

D4040

D4040  

P4040

Black Resin, 24-pin DIP

P4040

P4040  

Related Chips

Related Chips

Intel 4004

Second Sources

None

Support Chips MCS-4 Chips4001 (ROM), 4002-1 (RAM), 4002-2 (RAM), 4003 (Shift)4008 (EPROM Interface), 4009 (EPROM Interface) 

MCS-40 Chips

4201 (Clock, Avail 1Q/75), 4207 (I/O), 4209 (I/O), 4211 (I/O), 4265, 4269, 4289 (System Memory Interface), 4308 (1K ROM)

 

Supplemental Chips

4702 (EEPROM), (4316 2K ROM), 4101 (128K RAM), 3216/3226 (4-bit Bus Driver)