TIL302, TIL303, TIL304

NUMERIC DISPLAYS

SOES010A, APRIL 1971 − REVISED DECEMBER 1993

POST OFFICE BOX 655303

POST OFFICE BOX 1443

6

APPLICATION INFORMATION

FUNCTION TABLE

SN7447A

DECIMAL

OR

INPUTS

BI/RBO†

SEGMENTS

NOTE

OR

FUNCTION

LT

RBI

D

C

B

A

BI/RBO†

a

b

c

d

e

f

g

NOTE

0

1

2

3

H

H

H

H

H

X

X

X

L

L

L

L

L

L

L

L

L

L

H

H

L

H

L

H

H

H

H

H

ON

OFF

ON

ON

ON

ON

ON

ON

ON

ON

OFF

ON

ON

OFF

ON

ON

ON

OFF

ON

OFF

ON

OFF

OFF

OFF

OFF

OFF

ON

ON

1

1

1

1

4

5

6

7

H

H

H

H

X

X

X

X

L

L

L

L

H

H

H

H

L

L

H

H

L

H

L

H

H

H

H

H

OFF

ON

OFF

ON

ON

OFF

OFF

ON

ON

ON

ON

ON

OFF

ON

ON

OFF

OFF

OFF

ON

OFF

ON

ON

ON

OFF

ON

ON

ON

OFF

1

1

1

1

8

9

10

11

H

H

H

H

X

X

X

X

H

H

H

H

L

L

L

L

L

L

H

H

L

H

L

H

H

H

H

H

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

ON

ON

OFF

ON

ON

ON

OFF

ON

OFF

ON

ON

OFF

OFF

ON

ON

ON

ON

1

1

1

1

12

13

14

15

H

H

H

H

X

X

X

X

H

H

H

H

H

H

H

H

L

L

H

H

L

H

L

H

H

H

H

H

OFF

ON

OFF

OFF

ON

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

ON

OFF

OFF

OFF

ON

OFF

ON

ON

ON

OFF

ON

ON

ON

OFF

1

1

1

1

BI

RBI

LT

X

H

L

X

L

X

X

L

X

X

L

X

X

L

X

X

L

X

L

L

H

OFF

OFF

ON

OFF

OFF

ON

OFF

OFF

ON

OFF

OFF

ON

OFF

OFF

ON

OFF

OFF

ON

OFF

OFF

ON

2

3

4

H = high level (logic 1 in positive logic), L = low level (logic 0 in positive logic), X = irrelevant

† BI/RBO is a wire-AND logic serving as a blanking input (BI) and/or ripple-blanking output (RBO).

NOTES: 1. The blanking input (BI) must be open or held at a high logic level when output functions 0 through 15 are desired. The ripple-blanking

input (RBI) must be open or high if blanking of a decimal zero is not desired.

2. When a low logic level is applied directly to the blanking input (BI), all segment outputs are off regardless of any other input.

3. When the ripple-blanking input (RBI) and inputs A, B, C, and D are at a low logic level with the lamp-test input (LT) high, all segment

outputs are off and the ripple-blanking output (RBO) of the decoder goes to a low level (response condition).

4. When the blanking input/ripple-blanking output (BI/RBO) is open or held high and a low is applied to the lamp-test input (LT), all

segments are illuminated.

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

NUMERICAL DESIGNATIONS RESULTANT DISPLAYS