2Pcs LT1181AISW#TRPBF SO-16 RS-232 Interface IC +/-10kV, 5V RS232 Dx/Rx, 0.1uF

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1Pcs LT1181ACSW#TRPBF SO-16 RS-232 Interface IC +/-10kV, 5V RS232 Dx/Rx, 0.1uF

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2Pcs LT1281AISW#TRPBF RS-232 Interface IC L/P Dual 5V RS232, Dx/Rx, +/-10kV