Intel MCS-40
P4040, the MPU of the chipset.
Developer	Intel
Manufacturer	Intel
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

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

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

Design

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See also

• 4-bit
• MCS-4

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