National Semiconductor DS55493, DS75493 Technical data
DS55493/DS75493 Quad LED Segment Driver
DS55493/DS75493 Quad LED Segment Driver
April 1990
General Description
The DS55493/DS75493 is a quad LED segment driver. It is
designed to interface between MOS IC’s and LED’s. An external resistor is required for each segment to drive the output current which is approximately equal to 0.7V/R
relatively constant, independent of supply variations. Blank-
L
and is
ing can be achieved by taking the chip enable (CE) to a
logical ‘‘1’’ level.
Schematic and Connection Diagrams
Dual-In-Line Package
Features
Y
Low voltage operation
Y
Low input current for MOS compatibility
Y
Low standby power
Y
Display blanking capability
Y
Output current regulation
Y
Quad high gain circuits
Truth Table
TL/F/7561– 1
CE V
I
IN
OUT
01ON
0 0 OFF
1 X OFF
XeDon’t care
TL/F/7561– 2
Order Number DS55493J, DS75493J
or DS75493N
See NS Package Number J16A or N16A
C
1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.
TL/F/7561
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 10V
Output Voltage V
Storage Temperature Range
Output Current (I
OUT
)
b
65§Ctoa150§C
b
CC
25 mA
Operating Conditions
Supply Voltage
V
CC
V
SS
Temperature T
DS75493 0
A
DS55493
Min Max Units
3.2 8.8 V
6.5 8.8 V
b
55
a
70
a
125
C
§
C
§
Maximum Power Dissipation* at 25§C
Cavity Package 1371 mW
Molded Package 1280 mW
Lead Temperature (Soldering, 4 seconds) 260
*Derate cavity package 9.14 mW/§C above 25§C; derate molded package
C above 25§C.
10.24 mW/
§
Electrical Characteristics (V
t
SS
C
§
VCC) (Notes 2 and 3)
Symbol Parameter Conditions Min Typ Max Units
I
IN
I
CE
I
OUT
I
OL
I
CC
I
SS
Input Current V
Chip Enable Input Current V
Output Current I
Output Leakage Current I
Supply Current, V
CC
Supply Current V
e
SS
e
I
OUT
e
CC
to GND
@
OUT
e
OUT
Measure Current to Gnd, V
e
V
SS
e
V
CC
e
CC
e
V
CC
e
Max, V
R
SET
Max, V
2.15V, R
R
SET
8.8V, V
IN
@
0V, V
e
Max, V
SS
e
L
@
0V, V
8.8V 100 kX
Max, V
e
Max, All Other Pins to Gnd 40 mA
SS
e
Open, V
CC
e
8.8V 3.6 mA
CE
e
8.8V, All Other Pins
CE
50X V
e
CC
e
I
CE
Through 1.0 kX
e
V
CE
e
CC
e
IN
e
V
CE
1.0 kX,V
e
CE
e
Min, V
SS
80 mA, V
IN
e
0V, V
IN
e
Min, V
CE
8.8V Through
6.5V Though
e
8.8V
IN
0V 3.2 mA
6.5V,
e
8.8V
6.5V
b8b
b16b
13 mA
0V
2.1 mA
20 mA
b
200 mA
b
100 mA
0V, All Other Pins to Gnd 40 mA
Min, V
SS
e
8.8V I
@
2.15V, V
OUT
Through 100 kX, 0.5 1.5 mA
e
R
50X
L
e
I
Open, R
OUT
e
V
0V
CE
CE
SET
e
8.8V
e
Open,
1.4 mA
Switching Characteristics T
e
25§C, nominal power supplies unless otherwise noted
A
Symbol Parameter Conditions Min Typ Max Units
t
pd(OFF)
t
pd(ON)
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
DS55493.
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.
Propagation Delay to a Logical ‘‘0’’ (See AC Test Circuit
From Input to Output
Propagation Delay to a Logical ‘‘1’’ (See AC Test Circuit)
From Input to Output
Ctoa70§C range for the DS75493 and across theb55§Ctoa125§C range for the
§
170 300 ns
11 100 ns
2
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