LT1030
Quad Low Power
Line Driver
FEATURES
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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
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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
LINER [ LINEAR TECHNOLOGY ]
