NSC DS1489N, DS1489MX, DS1489M, DS1489AN, DS1489AMX Datasheet
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DS1489/DS1489A
Quad Line Receiver
General Description
The DS1489/DS1489A are quad line receivers designed to
interface dataterminal equipment with data communications
equipment. They are constructed on a single monolithic silicon chip. These devices satisfy the specifications of EIA
Standard RS-232D. The DS1489/DS1489A meet and exceed the specifications of MC1489/MC1489A and are
pin-for-pin replacements.
Features
n Four separate receivers per package
n Programmable threshold
n Built-in input threshold hysteresis
n “Fail safe” operating mode: high output for open inputs
n Inputs withstand
±
30V
Schematic and Connection Diagrams
DS005777-1
(1⁄4of unit shown)
DS1489: R
F
=
10k
DS1489A: R
F
=
2k
Dual-In-Line Package
DS005777-2
Top View
Order Number DS1489M, DS1489N
DS1489AM or DS1489AN
See NS Package Number M14A or N14A
May 1998
DS1489/DS1489A Quad Line Receiver
© 1998 National Semiconductor Corporation DS005777 www.national.com
AC Test Circuit and Voltage Waveforms
DS005777-3
DS005777-4
FIGURE 1.
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Absolute Maximum Ratings (Note 2)
If Military/Aerospace specified devices are required,
please contact theNational Semiconductor Sales Office/
Distributors for availability and specifications.
Power Supply Voltage 10V
Input Voltage Range
±
30V
Output Load Current 20 mA
Power Dissipation (Note 3) 1W
Operating Temperature Range 0˚C to +75˚C
Storage Temperature Range −65˚C to +150˚C
Maximum Power Dissipation (Note 1) at 25˚C
Molded DIP Package 1207 mW
SO Package 1042 mW
Lead Temperature (Soldering, 4
sec.) 260˚C
Note 1: Derate molded DIP package 9.7 mW/˚C above 25˚C; derate SO
package 8.33 mW/˚C above 25˚C.
Electrical Characteristics (Notes 3, 4, 5)
DS1489/DS1489A: The following apply for V
CC
=
5.0V
±
1%, 0˚C ≤ TA≤ +75˚C unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Units
V
TH
Input High Threshold Voltage V
OUT
≤ 0.45V, DS1489 T
A
=
25˚C 1.0 1.25 1.5 V
I
OUT
=
10 mA 0.9 1.6 V
DS1489A T
A
=
25˚C 1.75 2.00 2.25 V
1.55 2.40 V
V
TL
Input Low Threshold Voltage V
OUT
≥ 2.5V, T
A
=
25˚C 0.75 1.00 1.25 V
I
OUT
=
−0.5 mA 0.65 1.35 V
I
IN
Input Current V
IN
=
+25V +3.6 +5.6 +8.3 mA
V
IN
=
−25V −3.6 −5.6 −8.3 mA
V
IN
=
+3V +0.43 +0.53 mA
V
IN
=
−3V −0.43 −0.53 mA
V
OH
Output High Voltage I
OUT
=
−0.5 mA V
IN
=
0.75V 2.6 3.8 5.0 V
Input=Open 2.6 3.8 5.0 V
V
OL
Output Low Voltage V
IN
=
3.0V, I
OUT
=
10 mA 0.33 0.45 V
I
SC
Output Short Circuit Current V
IN
=
0.75V −3.0 mA
I
CC
Supply Current V
IN
=
5.0V 14 26 mA
P
d
Power Dissipation V
IN
=
5.0V 70 130 mW
Switching Characteristics
V
CC
=
5V, T
A
=
25˚C
Symbol Parameter Conditions Min Typ Max Units
t
pd1
Input to Output “High” R
L
=
3.9k, (
Figure 1
) (AC Test Circuit) 28 85 ns
Propagation Delay
t
pd0
Input to Output “Low” R
L
=
390Ω,(
Figure 1
) (AC Test Circuit) 20 50 ns
Propagation Delay
t
r
Output Rise Time R
L
=
3.9k, (
Figure 1
) (AC Test Circuit) 110 175 ns
t
f
Output Fall Time R
L
=
390Ω,(
Figure 1
) (AC Test Circuit) 9 20 ns
Note 2: “AbsoluteMaximum Ratings” are those values beyond which thesafetyofthedevice cannot be guaranteed. Except for “OperatingTemperature 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 deviceoperation.
Note 3: Unless otherwise specified min/max limits apply across the 0˚C to +75˚C temperature range for the DS1489 and DS1489A.
Note 4: All currents into device pins shownas positive, out of device pins as negative, all voltages referenced to ground unlessotherwise noted. All values shown
as max or min on absolute value basis.
Note 5: These specifications apply for response control pin=open.
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