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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 shapingcontrollead(WS) and
ground. This eliminates any need for external filtering of the
output signals. Output voltage levels and slew rates are independent 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
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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 −65˚C to +175˚C
Molded DIP −65˚C to +150˚C
Lead Temperature
Ceramic DIP (Soldering, 60 seconds) 300˚C
Molded DIP (Soldering, 10 seconds) 265˚C
Maximum Power Dissipation
*
at 25˚C (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 kΩ
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 RLto GND (R
L
=
∞
) 5.0 5.6 6.0 V
V
OH2
RLto GND (R
L
=
3.0 kΩ) 5.0 5.6 6.0 V
V
OH3
RLto GND (R
L
=
450Ω) 4.0 5.5 6.0 V
V
OL1
Output Voltage LOW RLto GND (R
L
=
∞
) −6.0 −5.7 −5.0 V
V
OL2
RLto GND (R
L
=
3.0 kΩ) −6.0 −5.6 −5.0 V
V
OL3
RLto GND (R
L
=
450Ω) −6.0 −5.4 −4.0 V
R
O
Output Resistance 450Ω≤R
L
25 50 Ω
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 µA
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 µA
V
I
=
5.5V 10 100
I+ Positive Supply Current V
CC
=
±
12V, R
L
=
∞
,1318mA
R
WS
=
100 kΩ,V
I
=
0V
I− Negative Supply Current V
CC
=
±
12V, R
L
=
∞
, −18 −13 mA
R
WS
=
100 kΩ,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 −55˚C to +125˚C temperature range for the DS9636AM and across the 0˚C to +70˚C range for
the DS9636AC. All typicals are given for V
CC
=
5V and T
A
=
25˚C.
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 25˚C. Above this temperature, derate J and N packages 10.4 mW/˚C.
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Switching Characteristics
V
CC
=
±
12V±10%,T
A
=
25˚C, see AC Test Circuit
Symbol Parameter Condition Min Typ Max Units
t
r
Rise Time R
WS
=
10 kΩ 0.8 1.1 1.4
R
WS
=
100 kΩ 8.0 11 14 µs
R
WS
=
500 kΩ 40 55 70
R
WS
=
1000 kΩ 80 110 140
t
f
Fall Time R
WS
=
10 kΩ 0.8 1.1 1.4
R
WS
=
100 kΩ 8.0 11 14 µs
R
WS
=
500 kΩ 40 55 70
R
WS
=
1000 kΩ 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
CLincludes jig and probe capacitance
DS009620-5
V
I
Amplitude: 3.0V
Offset: 0V
Pulse Width: 500 µs
PRR: 1.0 kHz
t
r
=
t
f
≤ 10 ns
FIGURE 1. AC Test Circuit and Waveforms
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Typical Performance Characteristics (Continued)
DS009620-6
FIGURE 2. RS-423 System Application
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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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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 reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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Tel: 1-800-272-9959
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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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