MCS-4/40 Family
The MCS-4 (Micro-Computer Set-4) or 4000 Series or Busicom Chip Set was a family of 4-bit microprocessor chipsets developed by Intel. The entire chipset was made of four individual chips, including the 4004 CPU which became the first commercial microprocessor. MCS-4 was completed by March 1971, entered production in June, and introduced into the market on November 15, 1971.
Intel1.MCS-4/40 Family Products
Part |
Description |
Year |
Photo |
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| 4001 | 2048-bit (256 x 8) ROM w/4-bit I/O Port | 1971 |   |
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| 4002 | 320-bit (4 x 80) RAM w/4-bit Output Port |  |
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| 4003 |  |
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| 4004 | Nov
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| 4008 | 4th Qtr 1972 | |||||
| 4009 | Standard Memory and I/O Interface for 4004 | 4th Qtr 1972 |  |
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| 4040 | 4-bit Microprocessor | 4th Qtr 1974 | ||||
| 4101 | 1024-bit (256 x 4) Static RAM w/Separate I/O | 1974 | ||||
| 4 MHz Clock Generator | 1st Qtr 1975 | |||||
| 4201A | 4 MHz Clock Generator | 1976-77 | ||||
| 4207 | General Purpose Byte Output Port | 1974 | ||||
| 4209 | General Purpose Byte Input Port | 1974 | ||||
| 4211 | General Purpose Byte I/O |
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| 4265 | Programmable General Purpose I/O Device | 1976 | ||||
| 4269 | Programmable Keyboard Display Device | 1976 | ||||
| 4289 | Standard Memory Interface for MCS-4/40 | 1974 | ||||
| 4308 | 8192-bit (1024 x 8) ROM w/4-bit I/O Ports | 1974 | ||||
| 4316 | 16384-bit (2048 x 8) Static ROM | 1973-74 | ||||
| 4316A | 16384-bit (2048 x 8) Static ROM | 1975-76 | ||||
| 4702A | 2048-bit (256 x 8) EPROM | 1974 | ||||
| 4801 | 5.185 MHz Clock Generator Crystal for 4004/4201A or 4040/4201A | 1976-77 |
2. MCS4 Set
2.1 Intel
White Ceramic
| Package | C4001 | C4002-1 | C4002-2 | C4003 | C4004 |
| Grey Trace |  |
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| Normal | |
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Half Round Key |
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| Black Dot |  |
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| 5 Series Left Grounding |
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| 5 Series Right Grounding |
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Grey Ceramic
| C4001 | C4002-1 | C4002-2 | C4003 | C4004 |
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Plastic
| C4001 | C4002-1 | C4002-2 | C4003 | C4004 | |
| Black |  |
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| Grey |  |
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| Yellow Print |  |
Plastic MCS-4 - Full Set
2.2 National Semiconductor (2nd Source)
White Ceramic
| Variant | INS4001D | INS4002-1D | INS4002-2D | INS4003D | INS4004D |
| No Grounding |  |
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| Left Grounding |  |
Gold
| INS4001D | INS4002-1D | INS4002-2D | INS4003D | INS4004D |
Purple Ceramic
| Variant | INS4001D | INS4002-1D | INS4002-2D | INS4003D | INS4004D |
| Gold Pins - Squiggly Line |
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| Silver Pins - Squiggly Line |  |
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| Silver Pins - NS |
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Grey Ceramic
| INS4001J | INS4002-1J | INS4002-2J | INS4003J | INS4004J |
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Plastic
| Logo | INS4001N | INS4002-1N | INS4002-2N | INS4003N | INS4004N |
| NS Logo |  |
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| Squiggly Line |  |