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DS75110A
Dual Line Drivers
General Description
The DS75110A is a dual line driver with independent chan-
nels, common supply and ground terminals featuring con-
stant current outputs. These drivers are designed for opti-
mum performance when used with the DS75107, DS75108
line receivers.
The output current of the DS75110A is nominally 12 mA and
may be switched to either of two output terminals with the
appropriate logic levels at the driver input.
Separate or common control inputs are provided for in-
creased logic versatility. These control or inhibit inputs allow
the output current to be switched off (inhibited) by applying
low logic levels to the control inputs. The output current in
the inhibit mode, I
O(Off)
, is specified so that minimum line
loading is induced. This is highly desirable in system applica-
tions using party line data communications.
Features
n
Improved stability over supply voltage and temperature
ranges
n
Constant current, high impedance outputs
n
High speed: 15 ns max propagation delay
n
Standard supply voltages
n
Inhibitor available for driver selection
n
High common mode output voltage range
(-3.0V to 10V)
n
TTL input compatibility
Connection Diagram
Function Table
Inputs
Outputs
Logic
Inhibitor
1
2
A/B
INH
A1/B1
A2/B2
X
X
L
X
Off
Off
X
X
X
L
Off
Off
L
X
H
H
Off
On
X
L
H
H
Off
On
H
H
H
H
On
Off
H = High
L = Low
X = Don't Care
14Lead Dual-In-Line Package
and SO-14 Package
DS009619-1
Top View
Order Number DS75110AM or DS75110AN
See NS Package Number M14A or N14A
January 1996
DS751
10A
Dual
Line
Drivers
1999 National Semiconductor Corporation
DS009619
www.national.com
Absolute Maximum Ratings
(Note 2)
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 and SO-14
-65C to +150C
Lead Temperature
Ceramic DIP (Soldering, 60 sec.)
300C
Molded DIP and SO-14
(Soldering, 10 sec.)
265C
Maximum Power Dissipation (Note 1) at 25C
Molded Package
1040 mW
SO Package
930 mW
Suppy Voltage
7.0V
Input Voltage (Any Input)
5.5V
Output Voltage (Any Output)
-5.0V to +12V
Recommended Operating Conditions
DS75110A
Units
Min
Typ
Max
Positive Supply Voltage (V
+
)
4.75
5.0
5.25
V
Negative Supply Voltage (V
-
)
-4.75
-5.0
-5.25
V
Positive Common Mode Voltage (V
CM+
)
0
10
V
Negative Common Mode Voltage (V
CM-
)
0
-3.0
V
Operating Temperature (T
A
)
0
25
70
C
Note 1: Derate molded DIP package 8.3 mW/C above 25C, derate SO package 7.5 mW/C above 25C.
Electrical Characteristics
(Notes 3, 4)
Over recommended operating temperature range, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
IH
Input Voltage HIGH
2.0
V
V
IL
Input Voltage LOW
0.8
V
V
IC
Input Clamp Voltage
V
CC
= Min, I
I
= -12 mA
-0.9
-1.5
V
I
O(On)
On-State
V
CC
= Max, V
O
= 10V
12
15
mA
Output Current
V
CC
= Min, V
O
= -3.0V
6.5
12
I
O(Off)
Off-State Output Current
V
CC
= Min, V
O
= 10V
100
A
(Inhibited Only)
I
I
Input Current
A, B or C
V
CC
= Max, V
I
= 5.5V
1.0
At Maximum
Inputs
mA
Input Voltage
D Input
2.0
I
IH
Input Current HIGH
A, B or C
V
CC
= Max, V
I
= 2.4V
40
Input
A
D Input
80
I
IL
Input Current LOW
A, B or C
V
CC
= Max, V
I
= 0.4V
-3.0
Input
mA
D Input
-6.0
I+
(On)
Positive Supply Current
V
CC
= Max,
23
35
mA
with Driver Enabled
A & B Inputs at 0.4V,
I-
(On)
Negative Supply Current
C & D Inputs at 2.0V
-34
-50
mA
with Driver Enabled
I+
(Off)
Positive Supply Current
V
CC
= Max,
21
mA
with Driver Inhibited
A, B, C & D Inputs
I-
(Off)
Negative Supply Current
at 0.4V
-17
mA
with Driver Inhibited
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 0C to +70C range for the DS75110. All typicals are given for V
CC
= 5V and T
A
= 25C.
Note 4: When using only one channel of the line drivers, the other channel should be inhibited and/or its outputs grounded.
www.national.com
2
Switching Characteristics
V
CC
=
5V, T
A
= 25C
Symbol
Parameter
Conditions
From
To
Min
Typ
Max
Units
(Input)
(Output)
t
PLH
Propagation Delay Time, LOW to HIGH
C
L
= 40 pF,
A or B
1 or 2
9.0
15
ns
t
PHL
Propagation Delay Time, HIGH to LOW
R
L
= 50
9.0
15
ns
t
PLH
Propagation Delay Time, LOW to HIGH
See Test Circuit
C or D
1 or 2
16
25
ns
t
PHL
Propagation Delay Time, HIGH to LOW
13
25
ns
DS009619-3
The pulse generators have the following characteristics:
t
r
= t
f
= 10 ns
5.0 ns, t
w1
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