1
LT1030
s
Low Operating Voltage
±
5V to
±
15V
s
Supply Current: 500
µ
A
s
Zero Supply Current When Shut Down
s
Outputs Can Be Driven
±
30V
s
Output "Open" When Off (Three-State)
s
Output Drive: 10mA
s
Pinout Similar to 1488*
s
Output of Several Devices Can Be Paralleled
The LT
®
1030 is an RS232 line driver that operates over a
±
5V to
±
15V range on low supply current and can be shut
down to zero supply current. Outputs are fully protected
from externally applied voltages of
±
30V by current limit-
ing. Since the output swings to within 200mV of the
positive supply and 1V of the negative supply, power
supply needs are minimized.
A major advantage of the LT1030 is the high impedance
output state when off or powered down, which allows
several different drivers on the same bus.
Our RS232 product line includes other high performance
devices. The LT1039 is a triple low power driver/receiver
with shutdown that can be powered from a 5V supply. The
LT1080 is a 5V powered dual driver/receiver with on-chip
±
9V power generator and shutdown.
Quad Low Power
Line Driver
FEATURES
DESCRIPTIO
N
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
RS232 Driver
s
Micropower Interface
s
Level Translator
APPLICATIO
N
S
U
*Check compatability (some pins may be different).
RS232 Line Driver
Output Swing vs Output Current
OUTPUT CURRENT (mA)
0
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
V
+
0.2
0.4
1.2
1.0
0.8
0.6
0.4
0.2
V
4
LT1030 · TA02
1
2
3
5
OUTPUT HIGH
OUTPUT LOW
1
2
3
4
5
6
7
14
13
12
11
10
9
8
6V
INPUT
OUTPUT
ON/OFF
(0V TO 5V)
INPUT
OUTPUT
GND
6V
STROBE*
INPUT
OUTPUT
NC
INPUT
OUTPUT
*NO CONNECTION NEEDED WHEN NOT USED
5V = ON
LT1030 · TA01
LT1030
TYPICAL APPLICATIO
N
S
U
2
LT1030
ORDER PART
NUMBER
Supply Voltage ......................................................
±
15V
Logic Input Pins ............................................. V
to 25V
On/Off Pin .................................................... GND to 12V
Output (Forced) .............................. V
+ 30V, V
+
30V
Short-Circuit Duration (to
±
30V) ..................... Indefinite
Operating Temperature Range
Commercial ............................................. 0
°
C to 70
°
C
Guaranteed Functional by Design ....... 25
°
C to 85
°
C
Storage Temperature ............................ 65
°
C to 150
°
C
Lead Temperature (Soldering, 10 sec).................. 300
°
C
ABSOLUTE
M
AXI
M
U
M
RATINGS
W
W
W
U
PACKAGE/ORDER I
N
FOR
M
ATIO
N
W
U
U
Consult factory for Industrial and Military grade parts.
(Supply Voltage =
±
5 to
±
15V)
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Current
V
ON/OFF
2.4V, I
OUT
= 0, All Outputs Low
q
500
1000
µ
A
Power Supply Leakage Current
V
ON/OFF
0.4V
1
10
µ
A
V
ON/OFF
0.1V
q
10
150
µ
A
Output Voltage Swing
Load = 2mA
Positive
V
+
0.3V
V
+
0.1V
V
Negative
V
+ 0.9V
V
+ 1.4V
V
Output Current
V
SUPPLY
±
5V to
±
15V
5
12
mA
Output Overload Voltage (Forced)
Operating or Shutdown
q
V
+
30V
V
+ 30V
V
Output Current
Shutdown
V
S
= 0V, V
OUT
=
±
30V
2
100
µ
A
V
S
=
±
15V, V
OUT
=
±
20V
2
100
µ
A
Input Overload Voltage (Forced)
Operating or Shutdown
q
V
15
V
Logic Input Levels
Low Input (V
OUT
= High)
q
1.4
0.8
V
High Input (V
OUT
= Low)
q
2
1.4
V
Logic Input Current
V
IN
> 2.0V
2
20
µ
A
V
IN
< 0.8V
10
20
µ
A
On/Off Pin Current
0
V
IN
5V
q
10
30
65
µ
A
Slew Rate
4
15
30
V/
µ
S
The
q
denotes specifications which apply over the full operating
temperature range.
Note 1: 3V applied to the Strobe pin will force all outputs low. Strobe pin
input impedance is about 2k to ground. Leave open when not used.
V
(Pin 1): Operates 15V to 2V.
LOGIC INPUT (Pins 2, 5, 9, 12): Operate properly on TTL
or CMOS levels. Output valid from (V
+ 2V)
V
IN
15V.
Connect to 5V when not used.
OUTPUT (Pins 3, 6, 8, 11): Line drive outputs.
ON/OFF (Pin 4): Shuts down entire circuit. Cannot be left
open. For "normally on" operation, connect between 5V to
10V.
GND (Pin 7): Ground must be more positive than V
.
PI
N
FU
N
CTIO
N
S
U
U
U
STROBE (Pin 13): Forces all outputs low. Drive with 3V.
V
+
(Pin 14): Positive supply 5V to 15V.
Note: As with other bipolar ICs, forward biasing the substrate diode can cause
problems. The LT1030 will draw high current from V
+
to ground if the V
pin is open
circuited or pulled above ground. If this is possible, connecting a diode from V
to
ground will prevent the high current state. Any low cost diode can be used.
14
8
1
7
LT1030
1N4001
LT1030 · PF01
LT1030CN
LT1030CS
LT1030CJ
CONSULT
FACTORY
T
JMAX
= 125
°
C,
JA
= 90
°
C/ W (N)
T
JMAX
= 125
°
C,
JA
= 95
°
C/ W (S)
1
2
3
4
5
6
7
TOP VIEW
N PACKAGE
14-LEAD PDIP
S PACKAGE
14-LEAD PLASTIC SO
14
13
12
11
10
9
8
V
(15V TO 5V)
ON/OFF
(0V TO 5V)
V
+
(5V TO 15V)
STROBE
GND
3
LT1030
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
U
W
On Supply Current vs
Temperature
On Supply Current vs Supply
Voltage
Off Supply Current vs
Temperature
TEMPERATURE (
°
C)
75
SUPPLY CURRENT (mA)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
25
25
50
LT1030 · TPC01
50
0
75
100
125
V
SUPPLY
=
±
12V
ALL OUTPUTS HIGH
ALL OUTPUTS LOW
TOTAL SUPPLY VOLTAGE (V)
10
SUPPLY CURRENT (mA)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
15
20
LT1030 · TPC02
25
30
ALL OUTPUTS HIGH
ALL OUTPUTS LOW
Shutdown Voltage vs
Temperature
Off Output Leakage vs
Temperature
TEMPERATURE (
°
C)
0.1
SUPPLY CURRENT (
µ
A)
0
100
25
75
100
125
LT1030 · TPC03
0.01
50
10
V
SUPPLY
=
±
12V
On/Off Pin Current vs Voltage
TEMPERATURE (
°
C)
0.1
OUTPUT LEAKAGE CURRENT (
µ
A)
0
100
25
75
100
125
LT1030 · TPC04
0.01
50
10
V
SUPPLY
=
±
12V
OUTPUT FORCED
TO 25V
OUTPUT FORCED
TO 25V
ON/OFF PIN VOLTAGE (V)
GND
ON/OFF PIN CURRENT (
µ
A)
LT1030 · TPC05
5
10
140
120
100
80
60
40
20
0
20
15
TEMPERATURE (
°
C)
75
ON/OFF PIN VOLTAGE (V)
125
LT1030 · TPC06
25
25
75
100
50
0
50
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
GND
MAX OFF VOLTAGE
(I
OUT
< 200
µ
A)
MAX OFF VOLTAGE
(I
OUT
< 20
µ
A)
MIN ON VOLTAGE
R
L
= 3k
Slew Rate vs Temperature
Current Limit vs Temperature
Output Swing vs Temperature
TEMPERATURE (
°
C)
75
5
OUTPUT CURRENT (mA)
10
15
20
25
25
25
75
125
LT1332 · TPC06
30
35
50
0
50
100
SINKING
SOURCING
TEMPERATURE (
°
C)
75
OUTPUT VOLTAGE REFERED TO SUPPLIES (V)
V
+
0.2
0.4
1.4
1.2
1.0
0.8
0.6
0.4
0.2
V
25
25
50
LT1030 · TPC08
50
0
75
100
125
I
OUT
= 5mA
I
OUT
= 5mA
I
OUT
= 1mA
I
OUT
= 1mA
TEMPERATURE (
°
C)
75
SLEW RATE (V/
µ
s)
25
23
21
19
17
15
13
11
9
7
5
25
25
50
LT1030 · TPC09
50
0
75
100
125
V
S
=
±
12V
R
L
= 3K
C
L
= 51pF
V
SLEW
=
±
8V
FALLING
RISING
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
4
LT1030
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900
q
FAX
: (408) 434-0507
q
TELEX
: 499-3977
LT/GP 0895 2K · REV B PRINTED IN USA
©
LINEAR TECHNOLOGY CORPORATION 1987
H = 100
µ
s/DIV
OUTPUT
(V
IN
= 0V)
OUTPUT
(V
IN
= 5V)
H = 2
µ
s/DIV
5V
0V
5V
10V
0V
10V
5V
0V
OUTPUT
(V
S
=
±
6V)
INPUT
OUTPUT
(V
S
=
±
12V)
H = 100
µ
s/DIV
6V
4V
2V
0V
0V
2V
4V
6V
5V
0V
OUTPUT
(V
IN
= 0V)
OUTPUT
(V
IN
= 5V)
ON/OFF
INPUT
V
S
=
±
12V
R
L
= 3k
C
L
= 51pF
V
S
=
±
6V
R
L
= 3k
C
L
= 51pF
R
L
= 3k
C
L
= 51pF
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
U
W
Output Waveforms
On-Off Response Time
On-Off Response Time
Output Waveform Driving
Capacitive Load
10V
5V
0V
0V
5V
10V
5V
0V
ON/OFF
INPUT
H = 10
µ
s/DIV
Strobe Pin Response Time
H = 2
µ
s/DIV
10V
5V
0V
5V
10V
OUTPUT
V
S
=
±
6V
R
L
= 3k
C
L
= 0.01
µ
F
V
IN
= 5V
V
S
=
±
6V
R
L
= 3k
C
L
= 0.01
µ
F
Dimension in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
N
U
PART NUMBER
DESCRIPTION
COMMENTS
LT1180A
Dual 5V RS232 Transceiver with Shutdown
Shutdown Plus 10kV ESD
LTC
®
1321
Programmable RS232/RS485 Transceiver
Low Supply Current, High Speed Data Transmission
LT1134A
4-Driver/4-Receiver RS232 Tranceiver
Single 5V Supply, 10kV ESD Protection, 0.1
µ
F Charge Pump Capacitor
LTC1383
Micropower Dual 5V RS232 Transceiver
Lowest Power 2-Driver/2-Receiver Solution
RELATED PARTS
OUTPUT
INPUT
6V
4V
2V
0V
2V
4V
6V
5V
0V
5V
0V
STROBE
INPUT
N Package
14-Lead Plastic DIP
N14 0695
0.015
(0.380)
MIN
0.125
(3.175)
MIN
0.130
±
0.005
(3.302
±
0.127)
0.045 0.065
(1.143 1.651)
0.065
(1.651)
TYP
0.018
±
0.003
(0.457
±
0.076)
0.100
±
0.010
(2.540
±
0.254)
0.005
(0.125)
MIN
0.255
±
0.015*
(6.477
±
0.381)
0.770*
(19.558)
MAX
3
1
2
4
5
6
7
8
9
10
11
12
13
14
0.009 0.015
(0.229 0.381)
0.300 0.325
(7.620 8.255)
0.325
+0.025
0.015
+ 0.635
0.381
8.255
(
)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
1
2
3
4
0.150 0.157**
(3.810 3.988)
14
13
0.337 0.344*
(8.560 8.738)
0.228 0.244
(5.791 6.197)
12
11
10
9
5
6
7
8
0.016 0.050
0.406 1.270
0.010 0.020
(0.254 0.508)
×
45
°
0
°
8
°
TYP
0.008 0.010
(0.203 0.254)
S14 0695
0.053 0.069
(1.346 1.752)
0.014 0.019
(0.355 0.483)
0.004 0.010
(0.101 0.254)
0.050
(1.270)
TYP
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*
**
S Package
14-Lead Plastic SO
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