DS9636A
RS-423 Dual Programmable Slew Rate Line Driver
General Description
The DS9636A is a TTL/CMOS compatible, dual, single
ended line driver which has been specifically designed to
satisfy the requirements of EIA Standard RS-423.
The DS9636A is suitable for use in digital data transmission
systems where signal wave shaping is desired. The output
slew rates are jointly controlled by a single external resistor
connected between the wave shaping control lead (WS) and
ground. This eliminates any need for external filtering of the
output signals. Output voltage levels and slew rates are in-
dependent of power supply variations. Current-limiting is
provided in both output states. The DS9636A is designed for
nominal power supplies of
12V.
Inputs are TTL compatible with input current loading low
enough (1/10 UL) to be also compatible with CMOS logic.
Clamp diodes are provided on the inputs to limit transients
below ground.
Features
n
Programmable slew rate limiting
n
Meets EIA Standard RS-423
n
Commercial or extended temperature range
n
Output short circuit protection
n
TTL and CMOS compatible inputs
Connection Diagram
8-Lead DIP
DS009620-1
Top View
Order Number DS9636ACN,
See NS Package Number N08E
For Complete Military Product Specifications,
refer to the appropriate SMD or MDS.
Order Number DS9636AJ/883
See NS Package Number J08A
May 1998
DS9636A
RS-423
Dual
Programmable
Slew
Rate
Line
Driver
1998 National Semiconductor Corporation
DS009620
www.national.com
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature Range
Ceramic DIP
-65C to +175C
Molded DIP
-65C to +150C
Lead Temperature
Ceramic DIP (Soldering, 60 seconds)
300C
Molded DIP (Soldering, 10 seconds)
265C
Maximum Power Dissipation
*
at 25C (Note 5)
Cavity Package
1560 mW
Molded Package
1300 mW
V+ Lead Potential to Ground Lead
V- to +15V
V- Lead Potential to Ground Lead
+0.5V to -15V
V+ Lead Potential to V- Lead
0V to +30V
Output Potential to Ground Lead
15V
Output Source Current
-150 mA
Output Sink Current
150 mA
Recommended Operating Conditions
Characteristics
DS9636AM
DS9636AC
Units
Min
Typ
Max
Min
Typ
Max
Positive Supply Voltage (V+)
10.8
12
13.2
10.8
12
13.2
V
Negative Supply Voltage (V-)
-13.2
-12
-10.8
-13.2
-12
-10.8
V
Operating Temperature (T
A
)
-55
25
125
0
25
70
C
Wave Shaping Resistance (R
WS
)
10
500
10
1000
k
Electrical Characteristics
(Notes 2, 3)
Over recommended operating temperature, supply voltage and wave shaping resistance ranges unless otherwise specified
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
OH1
Output Voltage HIGH
R
L
to GND (R
L
=
)
5.0
5.6
6.0
V
V
OH2
R
L
to GND (R
L
= 3.0 k
)
5.0
5.6
6.0
V
V
OH3
R
L
to GND (R
L
= 450
)
4.0
5.5
6.0
V
V
OL1
Output Voltage LOW
R
L
to GND (R
L
=
)
-6.0
-5.7
-5.0
V
V
OL2
R
L
to GND (R
L
= 3.0 k
)
-6.0
-5.6
-5.0
V
V
OL3
R
L
to GND (R
L
= 450
)
-6.0
-5.4
-4.0
V
R
O
Output Resistance
450
R
L
25
50
I
OS+
Output Short Circuit Current (Note 4)
V
O
= 0V, V
I
= 0V
-150
-60
-15
mA
I
OS-
V
O
= 0V, V
I
= 2.0V
15
60
150
mA
I
CEX
Output Leakage Current
V
O
=
6.0V, Power-Off
-100
+100
A
V
IH
Input Voltage HIGH
2.0
V
V
IL
Input Voltage LOW
0.8
V
V
IC
Input Clamp Diode Voltage
I
I
= 15 mA
-1.5
-1.1
V
I
IL
Input Current LOW
V
I
= 0.4V
-80
-16
V
I
IH
Input Current HIGH
V
I
= 2.4V
1.0
10
A
V
I
= 5.5V
10
100
I+
Positive Supply Current
V
CC
=
12V, R
L
=
,
13
18
mA
R
WS
= 100 k
, V
I
= 0V
I-
Negative Supply Current
V
CC
=
12V, R
L
=
,
-18
-13
mA
R
WS
= 100 k
, V
I
= 0V
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 tables of "Electrical Characteristics" provide conditions for actual device operation.
Note 2: Unless otherwise specified Min/Max limits apply across the -55C to +125C temperature range for the DS9636AM and across the 0C to +70C range for
the DS9636AC. All typicals are given for V
CC
= 5V and T
A
= 25C.
Note 3: All currents into the device pins are positive; all currents out of the device pins are negative. All voltages are reference to ground unless otherwise specified.
Note 4: Only one output at a time should be shorted.
Note 5: Ratings apply to ambient temperature at 25C. Above this temperature, derate J and N packages 10.4 mW/C.
www.national.com
2
Switching Characteristics
V
CC
=
12V
10%, T
A
= 25C, see AC Test Circuit
Symbol
Parameter
Condition
Min
Typ
Max
Units
t
r
Rise Time
R
WS
= 10 k
0.8
1.1
1.4
R
WS
= 100 k
8.0
11
14
s
R
WS
= 500 k
40
55
70
R
WS
= 1000 k
80
110
140
t
f
Fall Time
R
WS
= 10 k
0.8
1.1
1.4
R
WS
= 100 k
8.0
11
14
s
R
WS
= 500 k
40
55
70
R
WS
= 1000 k
80
110
140
Typical Performance Characteristics
Input/Output Transfer
Characteristic vs Temperature
DS009620-7
Input Current vs
Input Voltage
DS009620-8
Output Current vs
Output Voltage (Power On)
DS009620-9
Output Current vs
Output Voltage (Power Off)
DS009620-10
Supply Current
vs Temperature
DS009620-11
Transition Time vs R
WS
DS009620-12
DS009620-4
C
L
includes jig and probe capacitance
DS009620-5
V
I
Amplitude: 3.0V
Offset: 0V
Pulse Width: 500 s
PRR: 1.0 kHz
t
r
= t
f
10 ns
FIGURE 1. AC Test Circuit and Waveforms
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3
Typical Performance Characteristics
(Continued)
DS009620-6
FIGURE 2. RS-423 System Application
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4
Physical Dimensions
inches (millimeters) unless otherwise noted
Ceramic Dual-In-Line Package (J)
Order Number DS9636AJ/883
NS Package Number J08A
Molded Dual-In-Line Package (N)
Order Number DS9636ACN
NS Package Number N08E
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5
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the body, or (b) support or sustain life, and whose fail-
ure to perform when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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DS9636A
RS-423
Dual
Programmable
Slew
Rate
Line
Driver
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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