BCD to 7-Segment Decoder
General Description
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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