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1 M54HC21 DUAL 4-INPUT AND GATE 238K ST 4267642
2 M54HC21 RAD-HARD DUAL 4-INPUT AND GATE 122K ST 1700031
3 M54HC21_04 M54HC21_04 122K ST 2177107
4 M54HC21D RAD-HARD DUAL 4-INPUT AND GATE 122K ST 1700177
5 M54HC21D1 RAD-HARD DUAL 4-INPUT AND GATE 122K ST 1700176
6 M54HC21F1R DUAL 4-INPUT AND GATE 238K ST 4267641
7 M54HC21K RAD-HARD DUAL 4-INPUT AND GATE 122K ST 1700174
8 M54HC21K1 RAD-HARD DUAL 4-INPUT AND GATE 122K ST 1700172