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LIQUID CRYSTAL (LC) READOUT
MC14544B
OUTPUT
Ph
LIGHT EMITTING DIODE (LED) READOUT
COMMON
CATHODE LED
MC14544B
OUTPUT
Ph
V SS
NOTE: Bipolar transistors may be added for gain (for V DD
TRUTH TABLE
Inputs
RBI
LD
BI
Ph*
D
C
B
X
X
1
0
X
X
X
1
1
0
0
0
0
0
0
1
0
0
0
0
0
X
1
0
0
0
0
0
X
1
0
0
0
0
1
X
1
0
0
0
0
1
X
X
1
1
0
0
0
0
0
0
1
1
0
0
X
X
1
1
0
0
0
0
0
0
1
1
0
0
X
1
0
0
0
1
1
X
1
0
0
0
1
1
X
1
0
0
1
0
0
X
X
1
1
0
0
0
0
1
1
0
0
0
0
X
X
1
1
0
0
0
0
1
1
0
0
1
1
X
1
0
0
1
0
1
X
1
0
0
1
1
0
X
1
0
0
1
1
0
X
X
1
1
0
0
0
0
1
1
1
1
1
1
X
X
1
1
0
0
0
0
1
1
1
1
1
1
X
0
0
0
X
X
X
†
†
†
1
†
MC14544B
6–390
CONNECTIONS TO VARIOUS DISPLAY READOUTS
ONE OF SEVEN SEGMENTS
COMMON
BACKPLANE
SQUARE WAVE
(V SS TO V DD )
COMMON
ANODE LED
MC14544B
OUTPUT
Ph
V DD
v
10 V or I out
Outputs
A
RBO
a
b
c
d
e
f
X
#
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
1
1
0
0
0
0
0
1
1
0
1
1
0
1
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
1
1
0
0
1
1
0
0
1
0
1
1
1
1
1
0
1
1
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
1
1
1
1
1
1
1
1
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X
#
**
†
Inverse of Output
Combinations Above
INCANDESCENT READOUT
MC14544B
OUTPUT
GAS DISCHARGE READOUT
V DD
MC14544B
OUTPUT
10 mA).
X = Don't Care
†Above Combinations
g
Display
* For liquid crystal readouts, apply a square wave
0
Blank
to Ph. For common cathode LED readouts, select
Ph = 0. For common anode LED readouts, select
0
Blank
0
0
Ph = 1.
** Depends upon the BCD Code previously applied
0
1
when LD = 1.
1
2
1
3
# RBO = RBI
1
1
4
4
1
1
5
5
1
6
0
7
1
8
1
1
9
9
0
0
Blank
Blank
0
Blank
0
Blank
0
Blank
0
0
Bl
Blank
k
0
0
Blank
Blank
**
Display
as above
MOTOROLA CMOS LOGIC DATA
APPROPRIATE
VOLTAGE
Ph
V SS
APPROPRIATE
VOLTAGE
Ph
V SS
(A B C D)
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