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1 SN54LS257B QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS 187K MOTOROLA 4190004
2 SN54LS257B QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS 676K TI 4190003
3 SN54LS257B QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS 942K TI 2139025
4 SN54LS257B QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS 1099K TI 2139024
5 SN54LS257B_07 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS 942K TI 2139022
6 SN54LS257B_08 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS 1099K TI 2139021
7 SN54LS257BFK QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS 676K TI 4793940
8 SN54LS257BJ QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS 676K TI 4190002
9 SN54LS257BJ QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS 942K TI 2139023
10 SN54LS257BW QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS 676K TI 4190001