67023
4N51, 4N52,
4N53, 4N54
HERMETIC, NUMERIC AND HEXIDECIMAL DISPLAYS
4N51, 4N52, 4N54 Logic
t SETUP
DATA INPUT
(LOW LEVEL DATA)
1.5V
1.5V
t HOLD
BCD DATA (1)
TRUTH TABLE
X2
X8
DATA INPUT
(HIGH LEVEL DATA)
1.5V
1.5V
ENABLE
INPUT
1.5V
10%
1.5V
t LH
90%
t W
FIGURE 1 Timing Diagram of 4N51, 4N52 and 4N54 Series Logic
PIN NO.
Vcc
ENABLE
7
5
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
X4
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
X1
4N51/4N52
4N54
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
0
1
2
3
4
5
6
7
8
9
(BLANK)
(BLANK)
.....
(BLANK)
(BLANK)
V
V
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
DP=L
DP=H
V =L
E
V =H
E
V =L
B
VB =H
DECIMAL PT. (2)
LOGIC 8
1
INPUT
DP (2)
2
3
4
DC1
DC2
DC4
DC8
DP
LATCH
MEMORY
MATRIX
DECODER
ON
OFF
LOAD DATA
LATCH DATA
DISPLAY ON
DISPLAY OFF
ENABLE (1)
BLANKING (3)
DP
BLANKING (3)
CONTROL
4
LED MATRIX
DRIVER
LED MATRIX
GROUND 6
FIGURE 2 Block Diagram of 4N51, 4N52 and 4N54 Series Logic
NOTES:
1. H = Logic High: L = Logic Low. With the
enable input at logic high changes in BCD
input levels or D.P. input have no effect
upon display memory, displayed character,
or D.P.
2. The decmal point, DP, pertains only to
the 4n51 and 4n52 displays.
3. The blanking control, B, pertains only
to the 4n54 hexadecimal display.
Blanking input has no effect upon memory.
4N53 Over Range Character
7 Vcc
PIN
1
2
3
4
5
6
7
8
FUNCTION
Plus
Numeral One
Numeral One
NUMERAL ONE
MINUS PLUS
PLUS
TRUTH TABLE FOR TYPICAL DRIVING CIRCUIT
CHARACTER
dp
+
-
1
DECIMAL POINT
DP
Open
Open
Vcc
Minus/Plus
580
100
580
150
150
3
2
4
8
1
BLANK
1
H
L
X
X
L
PIN
2,3
X
X
H
X
L
4
X
X
X
H
L
8
H
H
X
X
L
NOTES:
L: Line switching transistor in figure 3 cutoff.
H: Line transistor in figure 3 satuated
X: Don't Care.
FIGURE 3
TYPICAL DRIVING CIRCUIT
MICROPAC INDUSTRIES, INC. OPTOELECTRONIC PRODUCTS DIVISION
•
725 E. Walnut St., Garland, TX 75040
•
(972) 272-3571
•
Fax (972) 487-6918
www.micropac.com
E-MAIL:
optosales@micropac.com
2-8
E-OEC [ OPTO ELECTRONICS CO,. LTD ]
