Absolute Maximum Ratings
(Note 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
8V
Input Voltage
5.5V
Storage Temperature
−65˚C to +150˚C
Maximum Power Dissipation (Note 1) at 25˚C
Molded DIP Package
1476 mW
SO Package
1051 mW
Lead Temperature
(Soldering, 4 seconds)
260˚C
Operating Conditions
Min
Supply Voltage, V
CC
DS3487
Temperature (T
A
)
DS3487
4.75
0
Max
5.25
+70
Units
V
˚C
Note 1:
Derate DIP molded package 11.9 mW/˚C above 25˚C. Derate SO
package 8.41 mW/˚C above 25˚C.
Electrical Characteristics
(Notes 3, 4, 5, 6)
Symbol
V
IL
V
IH
I
IL
I
IH
V
CL
V
OL
V
OH
I
OS
I
OZ
I
OFF
|V
OS
– V
OS
|
V
T
|V
T
|– V
T
|
I
CC
Parameter
Input Low Voltage
Input High Voltage
Input Low Current
Input High Current
Input Clamp Voltage
Output Low Voltage
Output High Voltage
Output Short-Circuit Current
Output Leakage Current
(TRI-STATE)
Output Leakage Current Power OFF
Difference in Output Offset Voltage
Differential Output Voltage
Difference in Differential Output
Voltage
Power Supply Current
Active
TRI-STATE
®
50
35
2.0
0.4
80
60
V
CC
= 0V
V
O
= 0.5V
V
O
= 5.5V
V
O
= 6V
V
O
= −0.25V
I
I
I
= −18 mA
= 48 mA
= −20 mA
2.5
−40
−140
−100
100
100
−100
0.4
V
IL
Conditions
Min
2.0
Typ
Max
0.8
Units
V
V
µA
µA
µA
V
V
V
mA
µA
µA
µA
µA
V
V
V
mA
mA
= 0.5V
V
IH
= 2.7V
V
IH
= 5.5V
−200
50
100
−1.5
0.5
CL
OL
OH
Switching Characteristics
V
CC
= 5V, T
A
= 25˚C
Symbol
t
PHL
t
PLH
t
THL
t
TLH
t
PHZ
t
PLZ
t
PZH
t
PZL
Parameter
Input to Output
Input to Output
Differential Fall Time
Differential Rise Time
Enable to Output
Enable to Output
Enable to Output
Enable to Output
R
L
= 200Ω, C
L
= 50 pF
R
L
= 200Ω, C
L
= 50 pF
R
L
=
∞
, C
L
= 50 pF, S1 Open
R
L
= 200Ω, C
L
= 50 pF, S2 Open
Conditions
Min
Typ
10
10
10
10
17
15
11
15
Max
15
15
15
15
25
25
25
25
Units
ns
ns
ns
ns
ns
ns
ns
ns
Note 2:
“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 3:
Unless otherwise specified min/max limits apply across the 0˚C to +70˚C range for the DS3487. All typicals are given for V
CC
= 5V and T
A
= 25˚C.
Note 4:
All currents into device pins are positive, all currents out of device pins as negative. All voltages are referenced to ground unless otherwise specified.
Note 5:
Only one output at a time should be shorted.
Note 6:
Symbols and definitions correspond to EIA RS-422, where applicable.
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