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Linear Technology Electronic Components Datasheet

LT1039 Datasheet

RS232 Driver/Receiver with Shutdown

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FEATURES
s Operates from ±5V to ±15V Supplies
s Fully Protected Against Overload
s Outputs Can Be Driven ±30V Without Damage
s Three-State Outputs; Outputs Open When Off
s Bipolar Circuit—No Latchup
s ±30V Input Range
s Triple Driver/Receiver
s No Supply Current in Shutdown
s 30kInput Impedance
s Meets All RS232 Specifications
s 16-Pin Version—Pin Compatible with MC145406
s Available in SO Package
s 15kV ESD: LT1039A
U
APPLICATIO S
s RS232 Interface
s Terminals
s Modems
LT1039/LT1039-16
RS232 Driver/Receiver
with Shutdown
DESCRIPTIO
The LT®1039 is a triple RS232 driver/receiver that in-
cludes shutdown. Each receiver will accept up to ±30V
input and can drive either TTL or CMOS logic. The RS232
drivers accept TTL logic inputs and output RS232 voltage
levels. The outputs are fully protected against overload
and can be shorted to ground or up to ±30V without
damage to the drivers. Additionally, when the system is
shut down or power is off, the outputs are in a high
impedance state allowing data line sharing. Bipolar cir-
cuitry makes this driver/receiver exceptionally rugged
against overloads or ESD damage.
A BIAS pin allows one receiver to be kept on while the rest
of the part is shut down.
The LT1039 is also available in the 16-pin version,
without shutdown or BIAS pin functions.
For applications requiring operation from a single 5V
supply, see the LT1080A/LT1081A, LT1180A/LT1181A
and LT1130A data sheets. For applications requiring
15kV ESD, see the LT1039A.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
12V
BIAS*
RS232 IN
1 V+
2
LT1039 VCC
18
17
5V
ON/OFF
3 16
LOGIC
30k
RS232 OUT
RS232 IN
4
5
30k
15 LOGIC
14 LOGIC
RS232 OUT
RS232 IN
6
7
30k
13
LOGIC
12 LOGIC
*BIAS PIN USED
TO KEEP THE
RS232 OUT
RECEIVER ON
WHILE IN SHUTDOWN
– 12V
8
9 V
11 LOGIC
GND 10
1039 TA01
V+
– 0.5
1.5
1.0
0.5
V
0
Driver Output Swing
POSITIVE
NEGATIVE
2 4 68
OUTPUT CURRENT (mA)
10
1039 TA02
1


Linear Technology Electronic Components Datasheet

LT1039 Datasheet

RS232 Driver/Receiver with Shutdown

No Preview Available !

LT1039/LT1039-16
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage
Driver (V+, V) ................................................. ±16V
Receiver (VCC) ...................................................... 7V
Logic Inputs .................................................. V to 25V
Receiver Inputs ..................................................... ±30V
ON/OFF Input .............................................. GND to 12V
Driver Outputs ....................... (V+ 30V) to (V+ – 30V)
Short-Circuit Duration ..................................... Indefinite
Operating Temperature Range
LT1039C .................................................. 0°C to 70°C
LT1039I ............................................. – 40°C to 85°C
LT1039M ......................................... – 55°C to 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
V+ 1
REC1 IN 2
TR1 OUT 3
REC2 IN 4
TR2 OUT 5
REC3 IN 6
TR3 OUT 7
V8
TOP VIEW
16 VCC
15 REC1 OUT
14 TR1 IN
13 REC2 OUT
12 TR2 IN
11 REC3 OUT
10 TR3 IN
9 GND
J PACKAGE
16-LEAD CERDIP
N PACKAGE
16-LEAD PDIP
SW PACKAGE
16-LEAD PLASTIC SO WIDE
TJMAX = 150°C, θJA = 100°C/ W (J)
TJMAX = 150°C, θJA = 140°C/ W (N)
TJMAX = 150°C, θJA = 150°C/ W (SW)
ORDER PART
NUMBER
LT1039CN16
LT1039CSW16
LT1039MJ16
V+ 1
BIAS 2
REC1 IN 3
TR1 OUT 4
REC2 IN 5
TR2 OUT 6
REC3 IN 7
TR3 OUT 8
V9
TOP VIEW
18 VCC
17 ON/OFF
16 REC1 OUT
15 TR1 IN
14 REC2 OUT
13 TR2 IN
12 REC3 OUT
11 TR3 IN
10 GND
J PACKAGE
18-LEAD CERDIP
N PACKAGE
18-LEAD PDIP
SW PACKAGE
18-LEAD PLASTIC SO WIDE
TJMAX = 150°C, θJA = 100°C/ W(J)
TJMAX = 150°C, θJA = 120°C/ W(N)
TJMAX = 150°C, θJA = 120°C/ W(SW)
ORDER PART
NUMBER
LT1039CJ
LT1039CN
LT1039CSW
LT1039IN
LT1039ISW
LT1039MJ
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
MIN TYP MAX
Driver V+ = 12V, V = – 12V, VON/OFF = 2.5V (Note 2)
Output Voltage Swing
Load = 3k to Ground
Positive
Negative
q V+ – 0.4
q V+ 1.5
V+ – 0.1
V + 1.0
Logic Input Voltage Levels
Logic Input Current
Input Low Level (VOUT = High)
Input High Level (VOUT = Low)
VIN 2.0V
VIN 0.8V
q 1.4 0.8
q 2.0
1.4
1 20
5 20
Output Short-Circuit Current
Sourcing Current, VOUT = 0V
Sinking Current, VOUT = 0V
5 15
– 5 – 15
Output Leakage Current
Shutdown (Notes 3, 4), VOUT = ±18V, VIN = 0V
q
10 (25°C) 200
Supply Leakage Current
Shutdown (Note 3)
q 1 (25°C) 100
Slew Rate
RL = 3k, CL = 51pF
4 15 30
Supply Current
VOUT = Low
48
UNITS
V
V
V
V
µA
µA
mA
mA
µA
µA
V/µs
mA
2


Part Number LT1039
Description RS232 Driver/Receiver with Shutdown
Maker Linear Technology
Total Page 12 Pages
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