Intel MCS-40
P4040, the MPU of the chipset.
Developer	Intel
Manufacturer	Intel
Type	Microprocessors
Production	1974
Architecture	4-bit word, 8-bit instruction, BCD-oriented
Word size	4 bit 0.5 octets 1 nibbles
Process	10 μm 10,000 nm 0.01 mm
Technology	pMOS
Clock	500 kHz-740 kHz
Package	DIP24
Succession
←	→
MCS-4 MCS-8	MCS-48 MCS-51 MCS-80

The MCS-40 (Micro-Computer Set-40) was a family of 4-bit microprocessor chipsets developed

by Intel and introduced in 1974. The MCS-40 was an enhancement to the MCS-4.

The entire chipset was made of four individual chips.

Members

MCS-40

Part	Description
4003	shift register
4040	MPU
4101	RAM
4201	clock generator
4207	General purpose I/O
4209	General purpose I/O
4211	General purpose I/O
4265	Programmable general purpose I/O
4269	Programmable keyboard display
4289	Memory interface (replacement for 4008/4009)
4308	1024x8 bits ROM (equivalent of 4001)
4316	2048x8 bits ROM
4702	256x8 bits EPROM

MCS-48

MCS-48 family of 8-bit microcontrollers:

MCS-48 (8048) MCU • 1976

• 8035 - 64 x 8 RAM
• 8039 - 128 x 8 RAM
• 8040 - 256 x 8 RAM
• 8048 - 64 x 8 RAM, 1K x 8 ROM
• 8049 - 128 x 8 RAM, 2K x 8 ROM
• 8050 - 256 x 8 RAM, 4K x 8 ROM
• 8748 - 64 x 8 RAM, 1KB EPROM

MCS-51

MCS-51 family of 8-bit microcontrollers:

MCS-51 (8051) MCU • 1980

• 8031 - 128 x 8 RAM
• 8032 - 256 x 8 RAM
• 8051 - 128 x 8 RAM, 4K x 8 ROM
• 8052 - 256 x 8 RAM, 8K x 8 ROM
• 8751 - 128 x 8 RAM, 4K x 8 EPROM

MCS-80

MCS-80 family of 8-bit microcontrollers:

MCS-80 (8080) MCU • 1974

• 8080

MCS-8

MCS-8 family of 8-bit microcontrollers:

MCS-8 (8008) MCU • 1972

• 8008

Design

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See also

• 4-bit
• MCS-4
• MCS-8
• MCS-40
• MCS-48
• MCS-51
• MCS-80
• MCS-85
• MCS-86
• MCS-88