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Datasheet Replacement Marking Code
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25LC128
SN74L (1223)SN74 (4991)SN7 (9)
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SN74LS348DR

Priority Encoder 1 x 8:3 16-SOIC
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SN74LS348DRE4

Priority Encoder 1 x 8:3 16-SOIC
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SN74LS348NSR

Priority Encoder 1 x 8:3 16-SO
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SN74LS348NSRE4

Priority Encoder 1 x 8:3 16-SO
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SN74LS399D

Multiplexer 4 x 2:1 16-SOIC
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SN74LS399DE4

Multiplexer 4 x 2:1 16-SOIC
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SN74LS399NSR

Multiplexer 4 x 2:1 16-SO
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SN74LS399NSRE4

Multiplexer 4 x 2:1 16-SO
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SN74LS42NSR

Decoder/Demultiplexer 1 x 4:10 16-SO
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SN74LS42NSRE4

Decoder/Demultiplexer 1 x 4:10 16-SO
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SN74LS253DG4

Multiplexer 2 x 4:1 16-SOIC
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SN74LS258BNSRG4

Multiplexer 4 x 2:1 16-SO
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SN74LS298DG4

Multiplexer 4 x 2:1 16-SOIC
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SN74LS298DRG4

Multiplexer 4 x 2:1 16-SOIC
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SN74LS348DRG4

Priority Encoder 1 x 8:3 16-SOIC
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SN74LS348NSRG4

Priority Encoder 1 x 8:3 16-SO
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SN74LS399DG4

Multiplexer 4 x 2:1 16-SOIC
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SN74LS399NSRG4

Multiplexer 4 x 2:1 16-SO
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SN74LS42NSRG4

Decoder/Demultiplexer 1 x 4:10 16-SO
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SN74LS292N

IC PROG FREQ DIV/TIMER 16-DIP
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SN74LS283NSR

IC BINARY FULL ADDERS 4BIT 16SO
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SN74LS283N

IC 4BIT BINARY FULL ADDER 16-DIP
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SN74LS294N

IC PROG FREQ DIV/TIMER 16-DIP
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SN74LS31N

IC HEX DELAY ELEMENT 16-DIP
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SN74LS31D

IC HEX DELAY ELEMENT 16-SOIC
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SN74LS283D

IC BIN FULL 4BIT ADD CAR 16-SOIC
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SN74LS31NSR

IC HEX DELAY ELEMENT 16SO
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SN74LS283NE4

IC 4BIT BINARY FULL ADDER 16-DIP
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SN74LS181N

IC ARTHMTC UNIT/FUN GEN 24-DIP
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SN74LS181NE4

IC ARTHMTC UNIT/FUN GEN 24-DIP
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SN74LS297N

IC DIG PLL FILTER 16-DIP
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SN74LS283DR

IC BIN FULL 4BIT ADD CAR 16-SOIC
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SN74LS283DRE4

IC BIN FULL 4BIT ADD CAR 16-SOIC
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SN74LS31DR

IC HEX DELAY ELEMENT 16-SOIC
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SN74LS31DRE4

IC HEX DELAY ELEMENT 16-SOIC
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SN74LS283DRG4

IC BINARY FULL ADDER 16SOIC
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SN74LS31DRG4

IC DELAY ELEMENT 16SOIC
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SN74LS47N

IC BCD/7-SEG DECOD/DRVR 16-DIP
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SN74LS47D

IC BCD TO 7-SEG DECODER 16-SOIC
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SN74LS47NSR

IC BCD-7 SEG DECODER/DRVR 16SO
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SN74LS247DR

IC BCD-7 SEG DECODER/DRVR 16SOIC
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SN74LS247NSR

IC BCD-7 SEG DECODER/DVR 16SO
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SN74LS247N

IC BCD/7-SEG DECOD/DRVR 16-DIP
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SN74LS247D

IC BCD TO 7-SEG DECODER 16-SOIC
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SN74LS247DRE4

IC BCD-7 SEG DECODER/DRVR 16SOIC
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SN74LS47DG4

IC BCD-7-SEG DECODE/DRIVR 16SOIC
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SN74LS247NE4

IC BCD/7-SEG DECOD/DRVR 16-DIP
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SN74LS47NE4

IC BCD-7 SEG DECODER/DRVR 16-DIP
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SN74LS247DE4

IC BCD-7 SEG DECODER/DRVR 16SOIC
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SN74LS247DG4

IC BCD/7-SEG DECOD/DRIVER 16SOIC
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