| SN54S251WB | | part details | | AMD / Texas Instruments ? | | | Avail | | 7900 |
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| SN54S251W-B | | part details | | AMD | | | Avail | | 169 |
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| SN54S251W-B | | part details | | AMD | | | Avail | | 150 |
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| SN54S251WB | | part details | | TI | | 85+ | | Avail | | 40 |
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| SN54S251W-B | | part details | | Advanced Micro Devices | | | Avail | | 16 |
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| SN54S251WB | | part details | | AMD | | 83 | | Avail | | 3 |
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| SN54S251WB | | part details | | AMD (Advanced Micro Devic | | | Avail | | 3 |
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| SN54S251W-B | | part details | | Advanced Micro Devices | | 8308 | | Avail | | 1 |
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