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DS1691A/DS3691 (RS-422/RS-423) Line Drivers with TRI-STATE Outputs
July 1998
DS1691A/DS3691
(RS-422/RS-423) Line Drivers with TRI-STATE
®
Outputs
General Description
The DS1691A/DS3691 are low power Schottky TTL line
drivers designed to meet the requirements of EIA standards
RS-422 and RS-423. They feature 4 buffered outputs with
high source and sink current capability with internal short
circuit protection. A mode control input provides a choice of
operation either as 4 single-ended line drivers or 2 differen-
tial line drivers. A rise time control pin allows the use of an
external capacitor to slow the rise time for suppression of
near end crosstalk to other receivers in the cable. Rise time
capacitors are primarily intended for waveshaping output
signals in the single-ended driver mode. Multipoint applica-
tions in differential mode with waveshaping capacitors is not
allowed.
With the mode select pin low, the DS1691A/DS3691 are
dual-differential line drivers with TRI-STATE outputs. They
feature
±
10V output common-mode range in TRI-STATE
mode and 0V output unbalance when operated with
±
5V
supply.
Features
n
Dual RS-422 line driver with mode pin low, or quad
RS-423 line driver with mode pin high
n
TRI-STATE outputs in RS-422 mode
n
Short circuit protection for both source and sink outputs
n
Outputs will not clamp line with power off or in
TRI-STATE
n
100Ω transmission line drive capability
n
Low I
CC
and I
EE
power consumption
RS-422: I
CC
= 9 mA/driver typ
RS-423: I
CC
= 4.5 mA/driver typ:
I
EE
= 2.5 mA/driver typ
n
Low current PNP inputs compatible with TTL, MOS and
CMOS
n
Pin compatible with AM26LS30
Connection Diagrams
With Mode Select LOW
(RS-422 Connection)
With Mode Select HIGH
(RS-423 Connection)
00578301
00578302
Top View
Top View
Ordering Information
Order Number
DS3691M
DS3691N
DS1691AJ/883
Package Type
SO Package
Molded DIP
Ceramic DIP
NS Package Number
M16A
N16E
J16A
For Complete Military Product Specifications, refer to the appropriate SMD or MDS.
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation
DS005783
www.national.com
DS1691A/DS3691
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
V
CC
V
EE
Maximum Power Dissipation (Note 1) at 25˚C
Cavity Package
Molded DIP Package
SO Package
Input Voltage
Output Voltage (Power OFF)
Storage Temperature
Lead Temperature
(Soldering, 4 seconds)
1509 mW
1476 mW
1051 mW
15V
7V
−7V
Operating Conditions
Min
Supply Voltage
DS1691A
V
CC
V
EE
DS3691
V
CC
V
EE
Temperature (T
A
)
DS1691A
DS3691
−55
0
+125
+70
˚C
˚C
4.75
−4.75
5.25
−5.25
V
V
4.5
−4.5
5.5
−5.5
V
V
Max
Units
±
15V
−65˚C to + 150˚C
260˚C
Note 1:
Derate cavity package 10.1 mW/˚C above 25˚C; derate molded DIP
package 11.9 mW/˚C above 25˚C. Derate SO package 8.41 mW/˚C above
25˚C.
DC Electrical Characteristics
(Notes 3, 4, 5, 6)
Symbol
V
IH
V
IL
I
IH
I
IL
V
I
V
O
V
O
V
T
V
T
V
OS
, V
OS
|V
T
| − | V
T
|
|V
OS
| − | V
OS
|
V
SS
V
CMR
I
XA
I
XB
I
OX
I
SA
I
SB
I
CC
Parameter
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
Input Clamp Voltage
Differential Output Voltage
V
A,B
Differential Output Voltage
V
A,B
Common-Mode Offset
Voltage
Difference in Differential
Output Voltage
Difference in Common-
Mode Offset Voltage
|V
T
− V
T
|
Output Voltage Common-
Mode Range
Output Leakage Current
Power OFF
TRI-STATE Output Current
Output Short Circuit Current
Output Short Circuit Current
Supply Current
V
CC
= Max
V
EE
= 0V and −5V
V
IN
= 0.4V
V
IN
= 2.4V
V
CC
= 0V
V
CMR
= 10V
V
CMR
= −10V
V
CMR
≤
10V
V
CMR
≥
−10V
V
OA
= 6V
V
OB
= 0V
V
OA
= 0V
V
OB
= 6V
80
−80
−80
80
18
100
−100
100
−100
150
−150
−150
150
30
µA
µA
µA
µA
mA
mA
mA
mA
mA
R
L
Conditions
Min
2
Typ
Max
Units
V
RS-422 CONNECTION, V
EE
CONNECTION TO GROUND, MODE SELECT
≤
0.8V
0.8
V
IN
= 2.4V
V
IN
≤
15V
V
IN
= 0.4V
I
IN
V
µA
µA
µA
V
V
V
V
V
1
10
−30
V
IN
= 2V
V
IN
= 0.8V
V
IN
= 2V
V
IN
= 0.8V
2
−2
3.6
−3.6
2.4
−2.4
2.5
0.05
0.05
4.0
4.8
40
100
−200
−1.5
6.0
−6.0
= −12 mA
R
L
=
∞
R
L
= 100Ω
V
CC
≥
4.75V
R
L
= 100Ω
R
L
= 100Ω
R
L
= 100Ω
3
0.4
0.4
V
V
V
V
V
= 100Ω, V
CC
≥
4.75V
V
DISABLE
= 2.4V
±
10
www.national.com
2
DS1691A/DS3691
AC Electrical Characteristics
T
A
= 25˚C
Symbol
t
r
t
f
t
PDH
t
PDL
t
PZL
t
PZH
t
PLZ
t
PHZ
Parameter
Output Rise Time
Output Fall Time
Output Propagation Delay
Output Propagation Delay
TRI-STATE Delay
TRI-STATE Delay
TRI-STATE Delay
TRI-STATE Delay
(Note 6)
Conditions
Min
Typ
120
120
120
120
250
180
180
250
Max
200
200
200
200
350
300
300
350
Units
ns
ns
ns
ns
ns
ns
ns
ns
RS-422 CONNECTION, V
CC
= 5V, MODE SELECT = 0.8V
R
L
= 100Ω, C
L
= 500 pF
(Figure 1
)
R
L
= 100Ω, C
L
= 500 pF
(Figure 1
)
R
L
= 100Ω, C
L
= 500 pF
(Figure 1
)
R
L
= 100Ω, C
L
= 500 pF
(Figure 1
)
R
L
= 450Ω, C
L
= 500 pF, C
C
= 0 pF
(Figure 4
)
R
L
= 450Ω, C
L
= 500 pF, C
C
= 0 pF
(Figure 4
)
R
L
= 450Ω, C
L
= 500 pF, C
C
= 0 pF
(Figure 4
)
R
L
= 450Ω, C
L
= 500 pF, C
C
= 0 pF
(Figure 4
)
DC Electrical Characteristics
(Notes 3, 4, 5, 6)
Symbol
V
IH
V
IL
I
IH
I
IL
V
I
V
O
V
O
V
T
V
T
|V
T
| − | V
T
|
I
X
I
X
I
S
+
−
Parameter
EE
|,
Conditions
MODE SELECT
≥
2V
Min
2
Typ
Max
Units
V
RS-423 CONNECTION, |V
CC
| = |V
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
Input Clamp Voltage
Output Voltage
Output Voltage
Output Unbalance
Output Leakage Power OFF
Output Leakage Power OFF
Output Short Circuit Current
Output Short Circuit Current
Slew Control Current
Positive Supply Current
Negative Supply Current
V
V
IN
IN
0.8
V
IN
= 2.4V
V
IN
≤
15V
V
IN
= 0.4V
I
IN
= −12 mA
R
L
=
∞
, (Note 7)
V
CC
≥
4.75V
R
L
= 450Ω
V
CC
≥
4.75V
|V
CC
|
V
µA
µA
µA
V
V
V
V
V
1
10
−30
V
IN
= 2V
V
IN
= 0.4V
V
IN
= 2.4V
V
IN
= 0.4V
L
40
100
−200
−1.5
6.0
−6.0
4.0
−4.0
3.6
−3.6
4.4
−4.4
4.1
−4.1
0.02
2
−2
−80
80
= |V
EE
| = 4.75V, R
EE
EE
= 450Ω
0.4
100
−100
−150
150
30
−22
V
µA
µA
mA
mA
µA
mA
mA
V
CC
= V
V
CC
= V
V
O
= 0V
V
O
= 0V
= 0V
= 0V
V
O
= 6V
V
O
= −6V
V
IN
= 2.4V
V
IN
= 0.4V
I
S+
−
I
SLEW
I
CC
I
EE
±
140
= 0.4V, R
L
=
∞
= 0.4V, R
L
=
∞
18
−10
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 tables of “Electrical Characteristics” provide conditions for actual device operation.
Note 3:
Unless otherwise specified, min/max limits apply across the −55˚C to +125˚C temperature range for the DS1691A and across the 0˚C to +70˚C range for
the DS3691. All typicals are given for V
CC
= 5V and T
A
= 25˚C. V
CC
and V
EE
as listed in operating conditions.
Note 4:
All currents into device pins are positive; all currents out of device pins are 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 and/or RS-423 where applicable.
Note 7:
At −55˚C, the output voltage is +3.9V minimum and −3.9V minimum.
AC Electrical Characteristics
T
A
= 25˚C
Symbol
t
r
t
f
t
r
t
f
t
rc
Parameter
Rise Time
Fall Time
Rise Time
Fall Time
Rise Time Coefficient
(Note 6)
Conditions
Min
Typ
120
120
3.0
3.0
0.06
Max
300
300
Units
ns
ns
µs
µs
µs/pF
RS-423 CONNECTION, V
CC
= 5V, V
EE
−5V, MODE SELECT = 2.4V
R
L
= 450Ω, C
L
= 500 pF, C
C
= 0 (Figure
2
)
R
L
= 450Ω, C
L
= 500 pF, C
C
= 0 (Figure
2
)
R
L
= 450Ω, C
L
= 500 pF C
C
= 50 pF (Figure
3
)
R
L
= 450Ω, C
L
= 500 pF C
C
= 50 pF (Figure
3
)
R
L
= 450Ω, C
L
= 500 pF, C
C
= 50 pF (Figure
3
)
3
www.national.com
DS1691A/DS3691
AC Electrical Characteristics
T
A
= 25˚C
Symbol
t
PDH
t
PDL
Parameter
Output Propagation Delay
Output Propagation Delay
(Note 6) (Continued)
Conditions
Min
Typ
180
180
Max
300
300
Units
ns
ns
R
L
= 450Ω, C
L
= 500 pF, C
C
= 0 (Figure
2
)
R
L
= 450Ω, C
L
= 500 pF, C
C
= 0 (Figure
2
)
AC Test Circuits and Switching Time Waveforms
00578304
00578303
FIGURE 1. Differential Connection
00578305
00578306
FIGURE 2. RS-423 Connection
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