TL F 5836
DS8669
2-Digit
BCD
to
7-Segment
DecoderDriver
August 1986
DS8669 2-Digit BCD to 7-Segment Decoder Driver
General Description
The DS8669 is a 2-digit BCD to 7-segment decoder driver
for use with common anode LED displays The DS8669
drives 2 7-segment LED displays without multiplexing Out-
puts are open-collector and capable of sinking 25 mA seg-
ment Applications include TV and CB channel displays
Features
Y
Direct 7-segment drive
Y
25 mA segment current sink capability
Y
Low power requirement
16 mA typ
Y
Very low input currents
2 mA typ
Y
Input clamp diodes to both V
CC
and ground
Y
No multiplexing oscillator noise
Logic and Connection Diagrams
TL F 5836 1
Dual-In-Line Package
TL F 5836 2
Top View
Order Number DS8669N
See NS Package Number N24A
C1995 National Semiconductor Corporation
RRD-B30M105 Printed in U S A
Absolute Maximum Ratings
(Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Current
20 mA
Output Voltage
12V
Storage Temperature Range
b
65 C to
a
150 C
Maximum Power Dissipation at 25 C
Molded Package
2005 mW
Lead Temperature (Soldering 10 seconds)
300 C
Derate molded package 16 04 mW C above 25 C
Operating Conditions
Min
Max
Units
Supply Voltage (V
CC
)
4 5
6 0
V
Temperature (T
A
)
0
a
70
C
Electrical Characteristics
V
CC
e
5 25V (Note 2)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
IH
Logical ``1'' Input Voltage
V
CC
e
Min
2 0
V
CC
a
0 6
V
V
IL
Logical ``0'' Input Voltage
V
CC
e
Min
b
0 3
0 8
V
I
O
Logical ``1'' Output
V
CC
e
Max
50
m
A
Leakage Current
V
OUT
e
10V
V
OL
Logical ``0'' Output Voltage
I
OL
e
25 mA
0 4
0 8
V
V
CC
e
Min
I
IH
Logical ``1'' Input Current
V
IN
e
V
CC
e
Max
2 0
10
m
A
I
IL
Logical ``0'' Input Current
V
IN
e
0V
b
0 1
b
10
m
A
V
CC
e
Max
I
CC
Supply Current
All Outputs Low
16
25
mA
V
CC
e
Max
V
IC
Input Clamp Voltage
I
IN
e
10 mA
V
CC
a
1 5V
V
I
IN
e b
10 mA
b
1 5V
V
t
pd0
Propagation Delay to a Logical ``0''
R
L
e
400X
10
m
s
from Any Input to Any Output
C
L
e
50 pF
t
pd1
Propagation Delay to a Logical ``1''
T
A
e
25 C
10
m
s
from Any Input to Any Output
Note 1
``Absolute Maximum Ratings'' are those values beyond which the safety of the device cannot be guaranteed They are not meant to imply that the devices
should be operated at these limits The table of ``Electrical Characteristics'' provides conditions for actual device operation
Note 2
Unless otherwise specified min max limits apply across the 0 C to
a
70 C range for the DS8669 All typicals are given for V
CC
e
5 25V and T
A
e
25 C
Note 3
All currents into device pins shown as positive out of device pins as negative all voltages referenced to ground unless otherwise noted All values shown
as max or min on absolute value basis
2
Truth Table
``0''
e
Segment ON
TL F 5836 3
``1''
e
Segment OFF
Display Segment Notation
TL F 5836 4
AC Test Circuit
TL F 5836 5
Switching Time Waveforms
TL F 5836 6
3
DS8669
2-Digit
BCD
to
7-Segment
DecoderDriver
Physical Dimensions
inches (millimeters)
Molded Dual-In-Line Package (N)
Order Number DS8669N
NS Package Number N24A
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DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
2 A critical component is any component of a life
systems which (a) are intended for surgical implant
support device or system whose failure to perform can
into the body or (b) support or sustain life and whose
be reasonably expected to cause the failure of the life
failure to perform when properly used in accordance
support device or system or to affect its safety or
with instructions for use provided in the labeling can
effectiveness
be reasonably expected to result in a significant injury
to the user
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