DM74LS48中文資料美國國家半導(dǎo)體數(shù)據(jù)手冊PDF規(guī)格書

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.