The \’LS48 translates four lines of BCD (8421) input data into the 7-segment numeral code and provides seven corresponding outputs having pull-up resistors, as opposed to totem pole pull-ups. These outputs can serve as logic signals,with a HIGH output corresponding to a lighted lamp segment,or can provide a 1.3 mA base current to npn lamp driver transistors. Auxiliary inputs provide lamp test, blanking and cascadable zero-suppression functions.The \’LS48 decodes the input data in the pattern indicated in the Truth Table and the segment identification illustration.
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