NSC DS75493 Quad led segment driver Datasheet

DS55493/DS75493 Quad LED Segment Driver
General Description
Features
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/RL and is
relatively constant, independent of supply variations. Blanking can be achieved by taking the chip enable (CE) to a
logical ‘‘1’’ level.
Y
Y
Y
Y
Y
Y
Low voltage operation
Low input current for MOS compatibility
Low standby power
Display blanking capability
Output current regulation
Quad high gain circuits
Schematic and Connection Diagrams
TL/F/7561 – 1
Dual-In-Line Package
Truth Table
CE
VIN
IOUT
0
0
1
1
0
X
ON
OFF
OFF
X e Don’t care
TL/F/7561 – 2
Order Number DS55493J, DS75493J
or DS75493N
See NS Package Number J16A or N16A
C1995 National Semiconductor Corporation
TL/F/7561
RRD-B30M105/Printed in U. S. A.
DS55493/DS75493 Quad LED Segment Driver
April 1990
Absolute Maximum Ratings (Note 1)
Operating Conditions
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage
Input Voltage
Output Voltage
10V
10V
VCC
Min
Max
Units
Supply Voltage
VCC
VSS
3.2
6.5
8.8
8.8
V
V
Temperature TA
DS75493
DS55493
0
b 55
a 70
a 125
§C
§C
b 65§ C to a 150§ C
Storage Temperature Range
b 25 mA
Output Current (IOUT)
Maximum Power Dissipation* at 25§ C
Cavity Package
1371 mW
Molded Package
1280 mW
Lead Temperature (Soldering, 4 seconds)
260§ C
*Derate cavity package 9.14 mW/§ C above 25§ C; derate molded package
10.24 mW/§ C above 25§ C.
Electrical Characteristics (VSS t VCC) (Notes 2 and 3)
Symbol
IIN
Parameter
Input Current
Max
Units
VSS e Max, VIN e 8.8V, VCC e Open, VCE e 0V
Conditions
3.2
mA
IOUT e RSET
3.6
mA
2.1
mA
@
Min
0V, VCE e 8.8V
ICE
Chip Enable Input Current
VCC e Max, VSS e Max, VCE e 8.8V, All Other Pins
to GND
IOUT
Output Current
IOUT
@
2.15V, RL e 50X
VCC e Min, VSS e 6.5V,
ICE e 80 mA, VIN e 6.5V
Through 1.0 kX
b8
VCE e 0V, VIN e 8.8V
IOL
Output Leakage Current
Typ
IOUT e RSET @ 0V,
Measure Current to Gnd,
VSS e 8.8V
b 13
b 16
mA
b 20
mA
VCC e Min, VCE e 0V
VIN e 8.8V Through
100 kX
b 200
mA
VCE e 6.5V Though
1.0 kX, VIN e 8.8V
b 100
mA
ICC
Supply Current, VCC
VCC e Max, VSS e Max, All Other Pins to Gnd
40
mA
ISS
Supply Current
VCC e 0V, All Other Pins to Gnd
40
mA
1.5
mA
1.4
mA
VCC e Min, VSS e 8.8V
IOUT @ 2.15V, VCE e 8.8V
Through 100 kX,
RL e 50X
0.5
IOUT e Open, RSET e Open,
VCE e 0V
Switching Characteristics TA e 25§ C, nominal power supplies unless otherwise noted
Symbol
Parameter
Conditions
tpd(OFF)
Propagation Delay to a Logical ‘‘0’’
From Input to Output
(See AC Test Circuit
tpd(ON)
Propagation Delay to a Logical ‘‘1’’
From Input to Output
(See AC Test Circuit)
Min
Typ
Max
Units
170
300
ns
11
100
ns
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 DS75493 and across the b 55§ C to a 125§ C range for the
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.
2
Typical Applications
TL/F/7561 – 3
AC Test Circuit
Switching Time Waveforms
TL/F/7561 – 5
TL/F/7561 – 4
Physical Dimensions inches (millimeters)
Order Number DS55493J, DS75493J
NS Package Number J16A
3
DS55493/DS75493 Quad LED Segment Driver
Physical Dimensions inches (millimeters) (Continued)
Order Number DS75493N
See NS Package Number N16A
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