| Cross Reference Notes | Schottky | High Speed | Low-Power Schottky | Standard | Low Power |
| TTL Cross Reference (80's) | | | | DM74123N National Semiconductor | |
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| TTL Cross Reference (80's) | | | | FLK121 Siemens | |
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| TTL Cross Reference (80's) | | | | HD74123 Hitachi | |
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| TTL Cross Reference (80's) | | | | HD74123P Hitachi | |
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| TTL Cross Reference (80's) | | | | M53323P Mitsubishi | |
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| TTL Cross Reference (80's) | | | | MB440 Fujitsu | |
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| TTL Cross Reference (80's) | | | | MB440M Fujitsu | |
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| TTL Cross Reference (80's) | | | | MC74123P Motorola | |
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| TTL Cross Reference (80's) | | | | N74123 Signetics | |
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| TTL Cross Reference (80's) | | | | N74123B Signetics | |
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| TTL Cross Reference (80's) | | | | N74123F Signetics | |
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| TTL Cross Reference (80's) | | | | S54123B Signetics | |
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| TTL Cross Reference (80's) | | | | S54123F Signetics | |
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| TTL Cross Reference (80's) | | | | S54123W Signetics | |
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| TTL Cross Reference (80's) | | | | uPB2123D NEC | |
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| TTL Cross Reference (80's) | | | 74LS123M Philips | FC74123P Fairchild Semiconductor | |
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| TTL Cross Reference (80's) | | | DM54LS123 National Semiconductor | FM54123D Fairchild Semiconductor | DM74L123 National Semiconductor |
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| TTL Cross Reference (80's) | | | DM74LS123 National Semiconductor | FM9N123D Fairchild Semiconductor | |
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| TTL Cross Reference (80's) | | | HD74LS123P Hitachi | FC9N123D Fairchild Semiconductor | |
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| TTL Cross Reference (80's) | | | M74LS123P Mitsubishi | FC9N123P Fairchild Semiconductor | |
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| TTL Cross Reference (80's) | | | N74LS123 Signetics | FC74123D Fairchild Semiconductor | |
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| TTL Cross Reference (80's) | | | SN54LS123J Texas Instruments | SN54123J Texas Instruments | SN54L123J Texas Instruments |
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| TTL Cross Reference (80's) | | | SN54LS123W Texas Instruments | SN54123W Texas Instruments | SN74L123J Texas Instruments |
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| TTL Cross Reference (80's) | | | SN74LS123J Texas Instruments | SN74123J Texas Instruments | SN74L123N Texas Instruments |
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| TTL Cross Reference (80's) | | | SN74LS123N Texas Instruments | SN74123N Texas Instruments | DM54L123A National Semiconductor |
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