LT1030
Quad Low Power
Line Driver
FEATURES
s
s
s
s
s
s
s
s
DESCRIPTION
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
*Check compatability (some pins may be different).
Low Operating Voltage
±5V
to
±15V
Supply Current: 500
µ
A
Zero Supply Current When Shut Down
Outputs Can Be Driven
±
30V
Output “Open” When Off (Three-State)
Output Drive: 10mA
Pinout Similar to 1488*
Output of Several Devices Can Be Paralleled
APPLICATIONS
s
s
s
RS232 Driver
Micropower Interface
Level Translator
TYPICAL APPLICATIONS
RS232 Line Driver
– 6V
INPUT
OUTPUT
1
2
3
LT1030
14
13
12
11
10
9
8
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
V
+
–0.2
–0.4
OUTPUT HIGH
Output Swing vs Output Current
6V
STROBE*
INPUT
OUTPUT
NC
INPUT
OUTPUT
1.2
1.0
0.8
0.6
0.4
0.2
V
–
0
1
3
4
2
OUTPUT CURRENT (mA)
5
OUTPUT LOW
ON/OFF 4
(0V TO 5V)
†
5
INPUT
6
OUTPUT
7
GND
*NO CONNECTION NEEDED WHEN NOT USED
†
5V = ON
LT1030 • TA01
U
U
U
LT1030 • TA02
1
LT1030
ABSOLUTE
MAXIMUM
RATINGS
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
PACKAGE/ORDER INFORMATION
TOP VIEW
V
–
(–15V TO –5V)
1
2
3
ON/OFF
(0V TO 5V)
4
5
6
GND
7
V
+
14 (5V TO 15V)
13 STROBE
12
11
10
9
8
S PACKAGE
14-LEAD PLASTIC SO
ORDER PART
NUMBER
LT1030CN
LT1030CS
N PACKAGE
14-LEAD PDIP
T
JMAX
= 125°C,
θ
JA
= 90°C/ W (N)
T
JMAX
= 125°C,
θ
JA
= 95°C/ W (S)
LT1030CJ
CONSULT
FACTORY
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
PARAMETER
Supply Current
Power Supply Leakage Current
Output Voltage Swing
Output Current
Output Overload Voltage (Forced)
Output Current
Input Overload Voltage (Forced)
Logic Input Levels
Logic Input Current
On/Off Pin Current
Slew Rate
(Supply Voltage =
±5
to
±15V)
MIN
q
q
V
+
– 0.3V
5
q
V
+
– 30V
2
2
q
q
q
V
–
2
1.4
1.4
2
10
30
15
CONDITIONS
V
ON/OFF
≥
2.4V, I
OUT
= 0, All Outputs Low
V
ON/OFF
≤
0.4V
V
ON/OFF
≤
0.1V
Load = 2mA Positive
Negative
V
SUPPLY
±
5V to
±15V
Operating or Shutdown
Shutdown
V
S
= 0V, V
OUT
=
±30V
V
S
=
±15V,
V
OUT
=
±
20V
Operating or Shutdown
Low Input (V
OUT
= High)
High Input (V
OUT
= Low)
V
IN
> 2.0V
V
IN
< 0.8V
0
≤
V
IN
≤
5V
TYP
500
1
10
V
+
– 0.1V
V
–
+ 0.9V
12
MAX
1000
10
150
V
–
+ 1.4V
V
–
+ 30V
100
100
15
0.8
20
20
65
30
UNITS
µA
µA
µA
V
V
mA
V
µA
µA
V
V
V
µA
µA
µA
V/µS
q
–10
4
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.
PIN FUNCTIONS
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
–
.
STROBE (Pin 13):
Forces all outputs low. Drive with 3V.
V
+
(Pin 14):
Positive supply 5V to 15V.
14
LT1030
1
1N4001
7
8
LT1030 • PF01
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.
2
U
W
U
U
W W
U
W
U
U
LT1030
TYPICAL PERFORMANCE CHARACTERISTICS
On Supply Current vs
Temperature
5.0
4.5
4.0
V
SUPPLY
=
±12V
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
ALL OUTPUTS HIGH
3.5
3.0
2.5
2.0
1.5
1.0
ALL OUTPUTS HIGH
SUPPLY CURRENT (µA)
ALL OUTPUTS LOW
100 125
LT1030 • TPC01
0
–75 –50 –25 0 25 50 75
TEMPERATURE (°C)
Off Output Leakage vs
Temperature
100
V
SUPPLY
=
±12V
ON/OFF PIN CURRENT (µA)
140
120
OUTPUT LEAKAGE CURRENT (µA)
ON/OFF PIN VOLTAGE (V)
10
OUTPUT FORCED
TO –25V
0
0.1
OUTPUT FORCED
TO 25V
0.01
25
50
75
100
TEMPERATURE (°C)
125
LT1030 • TPC04
Current Limit vs Temperature
OUTPUT VOLTAGE REFERED TO SUPPLIES (V)
35
30
OUTPUT CURRENT (mA)
SINKING
25
20
SOURCING
15
10
5
25 50 75
–75 –50 –25 0
TEMPERATURE (°C)
SLEW RATE (V/µs)
U W
LT1332 • TPC06
On Supply Current vs Supply
Voltage
5.0
4.5
4.0
10
100
Off Supply Current vs
Temperature
V
SUPPLY
=
±12V
0
0.1
0.5
0
10
ALL OUTPUTS LOW
0.01
25
20
15
TOTAL SUPPLY VOLTAGE (V)
30
25
50
75
100
TEMPERATURE (°C)
125
LT1030 • TPC03
LT1030 • TPC02
On/Off Pin Current vs Voltage
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0
–20
GND
5
10
15
LT1030 • TPC05
Shutdown Voltage vs
Temperature
R
L
= 3k
MAX OFF VOLTAGE
(I
OUT
< 200µA)
MIN ON VOLTAGE
100
80
60
40
20
0.2
MAX OFF VOLTAGE
(I
OUT
< 20µA)
100 125
LT1030 • TPC06
ON/OFF PIN VOLTAGE (V)
GND
25 50 75
–75 –50 –25 0
TEMPERATURE (°C)
Output Swing vs Temperature
V
+
–0.2
–0.4
1.4
1.2
1.0
0.8
0.6
0.4
0.2
V
–
–75 –50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
LT1030 • TPC08
Slew Rate vs Temperature
25
23
21
19
17
15
13
11
9
7
5
–75 –50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
LT1030 • TPC09
I
OUT
= 5mA
I
OUT
= 1mA
V
S
=
±12V
R
L
= 3K
C
L
= 51pF
V
SLEW
=
±8V
FALLING
I
OUT
= –5mA
RISING
I
OUT
= –1mA
100 125
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.
3
LT1030
TYPICAL PERFORMANCE CHARACTERISTICS
On-Off Response Time
OUTPUT
(V
IN
= 0V)
10V
5V
0V
0V
OUTPUT
– 5V
(V
IN
= 5V)
– 10V
ON/OFF
INPUT
5V
0V
H = 100µs/DIV
V
S
=
±12V
R
L
= 3k
C
L
= 51pF
OUTPUT
(V
IN
= 0V)
OUTPUT
(V
IN
= 5V)
ON/OFF
INPUT
6V
4V
2V
0V
0V
– 2V
– 4V
– 6V
5V
0V
H = 100µs/DIV
Output Waveform Driving
Capacitive Load
6V
4V
2V
0V
OUTPUT
– 2V
– 4V
– 6V
5V
INPUT
0V
V
S
=
±6V
R
L
= 3k
C
L
= 0.01µF
PACKAGE DESCRIPTION
0.300 – 0.325
(7.620 – 8.255)
0.130
±
0.005
(3.302
±
0.127)
0.015
(0.380)
MIN
0.009 – 0.015
(0.229 – 0.381)
(
+0.025
0.325 – 0.015
8.255 + 0.635
– 0.381
)
0.125
(3.175)
MIN
0.010 – 0.020
×
45°
(0.254 – 0.508)
0.008 – 0.010
(0.203 – 0.254)
0.053 – 0.069
(1.346 – 1.752)
0° – 8° TYP
0.014 – 0.019
0.016 – 0.050
(0.355 – 0.483)
0.406 – 1.270
*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
RELATED PARTS
PART NUMBER
LT1180A
LTC
®
1321
LT1134A
LTC1383
DESCRIPTION
Dual 5V RS232 Transceiver with Shutdown
Programmable RS232/RS485 Transceiver
4-Driver/4-Receiver RS232 Tranceiver
Micropower Dual 5V RS232 Transceiver
COMMENTS
Shutdown Plus 10kV ESD
Low Supply Current, High Speed Data Transmission
Single 5V Supply, 10kV ESD Protection, 0.1µF Charge Pump Capacitor
Lowest Power 2-Driver/2-Receiver Solution
LT/GP 0895 2K • REV B PRINTED IN USA
4
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900
q
FAX
: (408) 434-0507
q
TELEX
: 499-3977
U
U W
On-Off Response Time
V
S
=
±6V
R
L
= 3k
C
L
= 51pF
5V
0V
–5V
Output Waveforms
R
L
= 3k
C
L
= 51pF
OUTPUT
(V
S
=
±6V)
10V
OUTPUT
0V
(V
S
=
±12V)
–10V
5V
INPUT
0V
H = 2µs/DIV
Strobe Pin Response Time
V
IN
= 5V
V
S
=
±6V
R
L
= 3k
C
L
= 0.01µF
10V
5V
OUTPUT
0V
– 5V
– 10V
STROBE
INPUT
5V
0V
H = 10µs/DIV
H = 2µs/DIV
Dimension in inches (millimeters) unless otherwise noted.
N Package
14-Lead Plastic DIP
0.045 – 0.065
(1.143 – 1.651)
14
0.065
(1.651)
TYP
0.005
(0.125)
MIN
0.100
±
0.010
(2.540
±
0.254)
0.018
±
0.003
(0.457
±
0.076)
0.255
±
0.015*
(6.477
±
0.381)
13
0.770*
(19.558)
MAX
11
12
10
9
8
1
2
3
4
5
6
7
N14 0695
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
S Package
14-Lead Plastic SO
0.228 – 0.244
(5.791 – 6.197)
0.004 – 0.010
(0.101 – 0.254)
14
13
0.337 – 0.344*
(8.560 – 8.738)
12
11
10
9
8
0.150 – 0.157**
(3.810 – 3.988)
0.050
(1.270)
TYP
1
2
3
4
5
6
7
S14 0695
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LINEAR TECHNOLOGY CORPORATION 1987
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