TL F 5843
DS8874
9-Digit
Shift
Input
LED
Driver
March 1988
DS8874 9-Digit Shift Input LED Driver
General Description
The DS8874 is a 9-digit LED driver which incorporates a
shift register input decoding circuit and a low battery indica-
tor Outputs will sink 110 mA at less than 0 5V drop when
sequentially selected When the V
CC
supply falls below 6 5V
typical segment current will be furnished at digit 9 time to
indicate a low battery condition Pin 13 is generally connect-
ed to the decimal point segment on the display so that when
a low battery condition exists the left-most decimal point
lights up
Features
Y
110 mA digit sink
Y
Low battery indicator
Y
Minimum number of connections
Y
MOS compatible inputs
Connection Diagram
Dual-In-Line Package
TL F 5843 1
Top View
Order Number DS8874N
See NS Package Number N14A
Equivalent Schematic
TL F 5843 2
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
10V
Input Voltage
3V
Output Voltage
10V
Storage Temperature Range
b
65 C to
a
150 C
Maximum Power Dissipation at 25 C
Molded Package
1280 mW
Lead Temperature (Soldering 4 sec )
260 C
Derate molded package 10 24 mW C above 25 C
Operating Conditions
Min
Max
Units
Supply Voltage (V
CC
)
6 0
9 5
V
Temperature (T
A
)
0
a
70
C
Electrical Characteristics
(Notes 2 and 3)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
I
IH
Logical ``1'' Input Current
V
CC
e
Max V
IN
e
3V
0 25
0 4
mA
I
IL
Logical ``0'' Input Current
V
CC
e
Max V
IN
e
0 8V
0 05
0 1
mA
V
CCL
Decimal Point ``ON''
V
dp
e
2 3V I
dp
e b
4 mA O9
e
V
OL
6 0
V
V
CCH
Decimal Point ``OFF''
V
dp
e
1V I
dp
e b
10 mA O9
e
V
OL
7 0
V
I
OH
Logical ``1'' Output Current
V
CC
e
Max Output Not Selected
100
m
A
V
OL
Logical ``0'' Output Voltage
V
CC
e
Min Output Selected I
O1
e
80 mA
0 45
1
V
V
CC
e
Max Output Selected I
O1
e
110 mA
0 6
1 5
V
I
CC
Supply Current
V
CC
e
Max One Output Selected
13
19
mA
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 All typicals are given for 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
Timing Diagram
(Upper Level More Positive)
TL F 5843 4
2
3
DS8874
9-Digit
Shift
Input
LED
Driver
Physical Dimensions
inches (millimeters)
Molded Dual-In-Line Package (N)
Order Number DS8874N
NS Package Number N14A
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NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
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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