| SNJ54LS251W | | part details | | T-I | | | Avail | | 1839 |
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| DM54LS251W | | part details | | National Semiconductor | | | Avail | | 358 |
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| SNJ54LS251W | | part details | | Texas Instruments | | 79+ | | Avail | | 320 |
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| SNC54LS251W | | part details | | T-I | | | Avail | | 264 |
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| SNJ54LS251W | | part details | | TI | | 8317 | | Avail | | 259 |
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| DM54LS251W | | part details | | NATIONAL SEMICONDUCTOR | | | Avail | | 110 |
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| SNJ54LS251W | | part details | | TI | | 83 | | Avail | | 49 |
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| SNJ54LS251W | | part details | | TI | | | Avail | | 25 |
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| SNJ54LS251W | | part details | | TI | | 8319 | | Avail | | 24 |
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| SNJ54LS251W | | part details | | TI | | 84 | | Avail | | 17 |
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| SN54LS251W | | part details | | AMD | | | Avail | | 12 |
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| SNJ54LS251W | | part details | | TI | | | Avail | | 5 |
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