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In StockMAXIM MAX232 datasheet
show$0.65 - $0.7
+5V-Powered, Multichannel RS-232 Drivers/Receivers
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In StockMAXIM MAX3232 datasheet
show$0.75
3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232 Transceivers
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