TL/F/10172
DM74LS48
BCD
to
7-Segment
Decoder
January 1992
DM74LS48
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 corre-
sponding outputs having pull-up resistors, as opposed to
totem pole pull-ups. These outputs can serve as logic sig-
nals, 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, blank-
ing and cascadable zero-suppression functions.
The ’LS48 decodes the input data in the pattern indicated in
the Truth Table and the segment identification illustration.
Connection Diagram
Dual-In-Line Package
TL/F/10172–1
Order Number DM74LS48M or DM74LS48N
See NS Package Number M16A or N16E
C
1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.