TL F 5830
DS75491
MOS-to-LED
Quad
Segment
Driver
DS75492
MOS-to-LED
Hex
Digit
Driver
February 1995
DS75491 MOS-to-LED Quad Segment Driver
DS75492 MOS-to-LED Hex Digit Driver
General Description
The DS75491 and DS75492 are interface circuits designed
to be used in conjunction with MOS integrated circuits and
common-cathode LEDs in serially addressed multi-digit dis-
plays The number of drivers required for this time-multi-
plexed system is minimized as a result of the segment-ad-
dress-and-digit-scan method of LED drive
Features
Y
50 mA source or sink capability per driver (DS75491)
Y
250 mA sink capability per driver (DS75492)
Y
MOS compatability (low input current)
Y
Low standby power
Y
High-gain Darlington circuits
Schematic and Connection Diagrams
DS75491 (each driver)
TL F 5830 1
DS75492 (each driver)
TL F 5830 2
DS75491 Dual-In-Line Package
TL F 5830 3
Top View
DS75492 Dual-In-Line Package
TL F 5830 4
Top View
Order Number DS75491N DS75492M or DS75492N
See NS Package Number M14A or N14A
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
DS75491 DS75492
Input Voltage Range (Note 4)
b
5V to V
SS
Collector Output Voltage (Note 5)
10V
10V
Collector Output to Input Voltage
10V
10V
Emitter to Ground Voltage (V
I
t
5V)
10V
Emitter to Input Voltage
5V
Voltage at V
SS
Terminal with Respect
to any Other Device Terminal
10V
10V
Collector Output Current
Each Collector Output
50 mA
250 mA
All Collector Outputs
200 mA
600 mA
DS75491
DS75492
Continuous Total Dissipation
600 mW
600 mW
Operating Temperature Range
0 C to
a
70 C
Storage Temperature Range
b
65 C to
a
150 C
Lead Temp (Soldering 10 sec)
300 C
300 C
Maximum Power Dissipation
at 25 C
Molded Package
1207 mW
1280 mW
Derate molded package 9 66 mW C above 25 C
Derate molded package 10 24 mW C above 25 C
Electrical Characteristics
V
SS
e
10V (Notes 2 and 3)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DS75491
V
CE ON
``ON'' State Collector Emitter Voltage
Input
e
8 5V through 1 kX
T
A
e
25 C
0 9
1 2
V
V
E
e
5V I
C
e
50 mA
T
A
e
0 70 C
1 5
V
I
C OFF
``OFF'' State Collector Current
V
C
e
10V
I
IN
e
40 mA
100
m
A
V
E
e
0V
V
IN
e
0 7V
100
m
A
I
I
Input Current at Maximum Input Voltage
V
IN
e
10V V
E
e
0V I
C
e
20 mA
2 2
3 3
mA
I
E
Emitter Reverse Current
V
IN
e
0V V
E
e
5V I
C
e
0 mA
100
m
A
I
SS
Current Into V
SS
Terminal
1
mA
DS75492
V
OL
Low Level Output Voltage
Input
e
6 5V through 1 kX
T
A
e
25 C
0 9
1 2
V
I
OUT
e
250 mA
T
A
e
0 70 C
1 5
V
I
OH
High Level Output Current
V
OH
e
10V
I
IN
e
40 mA
200
m
A
V
IN
e
0 5V
200
m
A
I
I
Input Current at Maximum Input Voltage
V
IN
e
10V I
OL
e
20 mA
2 2
3 3
mA
I
SS
Current Into V
SS
Terminal
1
mA
Switching Characteristics
V
SS
e
7 5V T
A
e
25 C
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DS75491
t
PLH
Propagation Delay Time Low-to-High Level Output (Collector)
V
IH
e
4 5V V
E
e
0V
100
ns
t
PHL
Propagation Delay Time High-to-Low Level Output (Collector)
R
L
e
200X C
L
e
15 pF
20
ns
DS75492
t
PLH
Propagation Delay Time Low-to-High Level Output
V
IH
e
7 5V R
L
e
39X
300
ns
t
PHL
Propagation Delay Time High-to-Low Level Output
C
L
e
15 pF
30
ns
Note 1
``Absolute Maximum Ratings'' are those values beyond which the safety of the device cannot be guaranteed Except for ``Operating Temperature Range''
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 temperature range for the DS75491 and DS75492
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
Note 4
The input is the only device terminal which may be negative with respect to ground
Note 5
Voltage values are with respect to network ground terminal unless otherwise noted
2
AC Test Circuits and Switching Time Waveforms
DS75491
TL F 5830 5
DS75492
TL F 5830 6
TL F 5830 7
Note 1
The pulse generator has the following characteristics Z
OUT
e
50X PRR
e
100 kHz t
W
e
1 ms
Note 2
C
L
includes probe and jig capacitance
Physical Dimensions
inches (millimeters)
14-Lead (0 150 Wide) Molded Small Outline Package JEDEC
Order Number DS75492M
NS Package Number M14A
3
DS75491
MOS-to-LED
Quad
Segment
Driver
DS75492
MOS-to-LED
Hex
Digit
Driver
Physical Dimensions
inches (millimeters) (Continued)
Molded Dual-In-Line Package (N)
Order Number DS75491N or DS75492N
NS Package Number N14A
LIFE SUPPORT POLICY
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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