DM74LS249 Datasheet, PDF (1/6 Pages) National Semiconductor (TI) – BCD to 7-Segment Decoder with Open-Collector Outputs

February 1992
DM74LS249
BCD to 7-Segment Decoder with Open-Collector Outputs
General Description
The ’LS249 has active HIGH open-collector outputs and in-
corporates the Lamp Test and BI RBO inputs Additionally
the ’LS249 will light the top bar (segment a) for numeral 6
and the bottom bar (segment d) for numeral 9
Connection Diagram
Dual-In-Line Package
Logic Symbol
Order Number DM74LS249N
See NS Package Number N16E
TL F 10213 – 1
V_CC e Pin 16
GND e Pin 8
Pin Names
A₀ – A₃
BI
LT
BI RBO
a–g
Description
BCD Inputs
Blanking Input (Active LOW)
Lamp Test Input (Active LOW)
Blanking Input (Active LOW) or
Ripple Blanking Output (Active LOW)
Segment Outputs (Active HIGH)
TL F 10213 – 2
C1995 National Semiconductor Corporation TL F 10213
RRD-B30M105 Printed in U S A