MC14511B
BCD-to-Seven Segment
Latch/Decoder/Driver
The MC14511B BCDtoseven segment latch/decoder/driver is
constructed with complementary MOS (CMOS) enhancement mode
devices and NPN bipolar output drivers in a single monolithic structure.
MC14511B
This device contains protection circuitry to protect the Due to the sourcing capability of this circuit, damage can
inputs against damage due to high static voltages or electric occur to the device if V is applied, and the outputs are
DD
fields. However, it is advised that normal precautions be shorted to V and are at a logical 1 (See Maximum
SS
taken to avoid application of any voltage higher than Ratings).
maximum rated voltages to this highimpedance circuit. Unused inputs must always be tied to an appropriate logic
A destructive high current mode may occur if V and V voltage level (e.g., either V or V ).
in out SS DD
are not constrained to the range V (V or V ) V .
SS in out DD
PIN ASSIGNMENT
B 1 16 V
DD
C 2 15 f
a
LT 3 14 g
fg b
BI 4 13 a
e c
LE 5 12 b
d
D 6 11 c
A 7 10 d
V 8 9 e
SS
DISPLAY
012 3 4 5 6 7 8 9
TRUTH TABLE
Inputs Outputs
LE BI LT D C B A a b c d e f g Display
X X 0 X X X X 1 11 11 11 8
X 0 1 X X X X 0 0 0 0 0 0 0 Blank
0 1 10 00 01 11 11 10 0
0 1 10 00 10 11 00 00 1
0 1 10 01 01 10 11 01 2
0 1 10 01 11 11 10 01 3
0 1 10 10 00 11 00 11 4
0 1 10 10 11 01 10 11 5
0 1 10 11 00 01 11 11 6
0 1 10 11 11 11 00 00 7
0 1 11 00 01 11 11 11 8
0 1 11 00 11 11 00 11 9
0 1 1 1 0 1 0 0 0 0 0 0 0 0 Blank
0 1 1 1 0 1 1 0 0 0 0 0 0 0 Blank
0 1 1 1 1 0 0 0 0 0 0 0 0 0 Blank
0 1 1 1 1 0 1 0 0 0 0 0 0 0 Blank
0 1 1 1 1 1 0 0 0 0 0 0 0 0 Blank
0 1 1 1 1 1 1 0 0 0 0 0 0 0 Blank
11 1 X X X X * *
X = Dont Care
* Depends upon the BCD code previously applied when LE = 0