LINER LT1039M Rs232 driver/receiver with shutdown Datasheet

LT1039/LT1039-16
RS232 Driver/Receiver
with Shutdown
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FEATURES
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DESCRIPTIO
Operates from ±5V to ±15V Supplies
Fully Protected Against Overload
Outputs Can Be Driven ±30V Without Damage
Three-State Outputs; Outputs Open When Off
Bipolar Circuit—No Latchup
±30V Input Range
Triple Driver/Receiver
No Supply Current in Shutdown
30kΩ Input Impedance
Meets All RS232 Specifications
16-Pin Version—Pin Compatible with MC145406
Available in SO Package
15kV ESD: LT1039A
The LT ®1039 is a triple RS232 driver/receiver that includes 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 circuitry 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.
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APPLICATIO S
The LT1039 is also available in the 16-pin version,
without shutdown or BIAS pin functions.
RS232 Interface
Terminals
Modems
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.
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, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
12V
BIAS*
RS232 IN
1
V+
2
LT1039
VCC
18
17
16
3
Driver Output Swing
5V
V+
ON/OFF
LOGIC
POSITIVE
– 0.5
RS232 OUT
RS232 IN
4
15
5
14
LOGIC
LOGIC
30k
RS232 OUT
RS232 IN
6
13
7
12
LOGIC
LOGIC
OUTPUT VOLTAGE (V)
30k
1.5
NEGATIVE
1.0
0.5
30k
*BIAS PIN USED
RS232 OUT
TO KEEP THE
RECEIVER ON
– 12V
WHILE IN SHUTDOWN
11
8
9
V–
GND
1039 TA01
10
LOGIC
V–
0
2
6
8
4
OUTPUT CURRENT (mA)
10
1039 TA02
1
LT1039/LT1039-16
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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
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PACKAGE/ORDER INFORMATION
ORDER PART
NUMBER
TOP VIEW
V+
1
16 VCC
REC1 IN
2
15 REC1 OUT
TR1 OUT
3
14 TR1 IN
REC2 IN
4
13 REC2 OUT
TR2 OUT
5
12 TR2 IN
REC3 IN
6
11 REC3 OUT
TR3 OUT
7
10 TR3 IN
V–
8
9
J PACKAGE
16-LEAD CERDIP
LT1039CN16
LT1039CSW16
LT1039MJ16
GND
N PACKAGE
16-LEAD PDIP
1
18 VCC
BIAS
2
17 ON/OFF
REC1 IN
3
16 REC1 OUT
TR1 OUT
4
15 TR1 IN
REC2 IN
5
14 REC2 OUT
TR2 OUT
6
13 TR2 IN
REC3 IN
7
12 REC3 OUT
TR3 OUT
8
11 TR3 IN
V–
9
10 GND
LT1039CJ
LT1039CN
LT1039CSW
LT1039IN
LT1039ISW
LT1039MJ
N PACKAGE
18-LEAD PDIP
J PACKAGE
18-LEAD CERDIP
SW PACKAGE
16-LEAD PLASTIC SO WIDE
ORDER PART
NUMBER
TOP VIEW
V+
SW PACKAGE
18-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)
TJMAX = 150°C, θJA = 100°C/ W(J)
TJMAX = 150°C, θJA = 120°C/ W(N)
TJMAX = 150°C, θJA = 120°C/ W(SW)
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Driver V + = 12V, V – = – 12V, VON/OFF = 2.5V (Note 2)
Output Voltage Swing
Logic Input Voltage Levels
Load = 3k to Ground
Positive
Negative
●
●
V + – 0.4
V – + 1.5
V + – 0.1
V – + 1.0
Input Low Level (VOUT = High)
Input High Level (VOUT = Low)
●
●
1.4
1.4
0.8
2.0
V
V
1
5
20
20
µA
µA
V
V
Logic Input Current
VIN ≥ 2.0V
VIN ≤ 0.8V
Output Short-Circuit Current
Sourcing Current, VOUT = 0V
Sinking Current, VOUT = 0V
Output Leakage Current
Shutdown (Notes 3, 4), VOUT = ±18V, VIN = 0V
●
10 (25°C)
200
µA
Supply Leakage Current
Shutdown (Note 3)
●
1 (25°C)
100
µA
Slew Rate
RL = 3k, CL = 51pF
15
30
V/µs
Supply Current
VOUT = Low
4
8
mA
2
5
–5
4
15
– 15
mA
mA
LT1039/LT1039-16
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
●
●
0.5
1.3
1.7
2.8
V
V
●
0.1
0.4
1.0
V
Receiver VCC = 5V, VON/OFF = 2.5V (Note 2)
Input Voltage Thresholds
Input Low Level (VOUT = High)
Input High Level (VOUT = Low)
Hysteresis
Input Resistance
●
30
Output Low, IOUT = – 1.6mA
Output High, IOUT = 160µA
●
●
3.5
0.4
4.8
Output Short-Circuit Current
Sourcing Current, VOUT = 0V (Note 5)
Sinking Current, VOUT = VCC
●
●
0.5
–10
Output Leakage Current
Shutdown (Note 2), 0V ≤ VOUT ≤ VCC, VIN = 0V
●
1
10
µA
●
4
7
mA
Output Voltage
Supply Current
Supply Leakage Current
Shutdown (Note 3)
●
ON/OFF Pin Current
0V ≤ VON/OFF ≤ 5V
●
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device by be impaired.
Note 2: VON/OFF = 5V for LT1039M grade devices.
Note 3: VON/OFF = 0.4V for – 55°C ≤ TA ≤ 100°C and VON/OFF = 0.2V for
100°C ≤ TA ≤ 125°C. Does not apply to LT1039-16 part.
kΩ
0.5
V
V
1
mA
mA
1 (25°C)
– 15
100
µA
80
µA
Note 4: For TA ≥ 100°C, leakage current is 350µA max.
Note 5: For TA ≤ – 25°C, output source current is 0.4mA.
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TYPICAL PERFORMANCE CHARACTERISTICS
Receiver Input Thresholds
ON/OFF Pin Thresholds
5.0
45
2.75
4.5
40
2.50
4.0
35
2.25
30
25
SINKING
20
15
SOURCING
2.00
ON/OFF PIN VOLTAGE (V)
3.00
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Driver Output Short-Circuit Current
50
INPUT HIGH
1.75
1.50
1.25
INPUT LOW
3.5
3.0
2.5
2.0
10
1.00
1.0
5
0.75
0.5
0
–55 –25
50
25
0
75
TEMPERATURE (°C)
100
125
1039 G01
0.50
–55 –25
50
25
0
75
TEMPERATURE (°C)
100
125
1039 G02
MINIMUM ON VOLTAGE
1.5
MINIMUM OFF VOLTAGE
0
–55 –25
50
25
0
75
TEMPERATURE (°C)
100
125
1039 G03
3
LT1039/LT1039-16
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TYPICAL PERFORMANCE CHARACTERISTICS
Driver Output Leakage
in Shutdown
Supply Current in Shutdown
1000
1000
SUPPLY CURRENT MEASURED
INTO VCC AND V +
10
0
25
50
75
TEMPERATURE (°C)
100
OUTPUT CURRENT (mA)
100
1
–55 –25
100
OUTPUT SINKING
OUTPUT LEAKAGE CURRENT (µA)
SUPPLY CURRENT (nA)
Receiver Output
Short-Circuit Current
100
VOUT
– 30V
10
1
–55 –25
125
0
25
50
75
TEMPERATURE (°C)
100
ON/OFF Pin Current vs Voltage
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
INPUT CURRENT (µA)
30
25
20
15
10
5
0
–5
2
3
INPUT VOLTAGE (V)
0.1
–55 –25
4
V+
– 0.2
OUTPUT HIGH
– 0.4
1.2
1.0
OUTPUT LOW
0.8
0.6
0.4
0.2
V–
5
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT CURRENT (mA)
1039 G08
Output Waveforms
Shutdown to Driver Output
10V
5V
0V
DRIVER
OUTPUT
10V
0V
DRIVER
OUTPUT
OUTPUT
LOW
– 5V
– 10V
V + = 12V
V – = –12V
VCC = 5V
RL = 3k
2µs/DIV
1039 G09
DRIVER OUTPUT CONNECTED TO RECEIVER INPUT
4
OUTPUT
HIGH
5V
0V
0V
DRIVER
OUTPUT – 10V
5V
INPUT
0V
ON/OFF
INPUT
5V
0V
V + = 12V
V – = –12V
RL = 3k
100
125
1039 G06
1039 G07
RECEIVER
OUTPUT
0
25
50
75
TEMPERATURE (°C)
Driver Output Swing vs Current
35
1
125
1039 G05
40
0
OUTPUT SOURCING
1
VOUT
30V
1039 G04
–10
10
1ms/DIV
1039 G10
LT1039/LT1039-16
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TYPICAL PERFORMANCE CHARACTERISTICS
Shutdown to Receiver Output
BIAS Pin Response Time
6V
6V
RECEIVER 4V
OUTPUT 2V
RECEIVER 1 4V
OUTPUT 2V
0V
0V
ON/OFF 5V
INPUT 0V
BIAS INPUT 5V
(THRU 25kΩ) 0V
VCC = 5V
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PIN FUNCTIONS
1ms/DIV
1039 G11
VCC = 5V
0.2µs/DIV
1039 G12
(Pin numbers listed are for 18-pin device)
V +, V – (Pins 1, 9): Driver Supply Pins. Supply current
drops to zero in shutdown mode. Driver outputs are in a
high impedance state when V + and V – = 0V.
BIAS (Pin 2): Keeps receiver 1 on while the LT1039 is in
the shutdown mode. Leave BIAS pin open when not in use.
See Applications Information for proper use.
REC IN (Pins 3, 5, 7): Receiver Input Pins. Accepts RS232
voltage levels (±30V) and has 0.4V of hysteresis to provide noise immunity. Input impedance is nominally 30kΩ.
TR OUT (Pins 4, 6, 8): Driver Outputs with RS232 Voltage
Levels. Outputs are in a high impedance state when in the
shutdown mode or when power is off (V + and V – = 0V) to
allow data line sharing. Outputs are fully short-circuit
protected from V – + 30V to V + – 30V with power on, off or
in the shutdown mode. Typical output breakdowns are
greater than ±45V and higher applied voltages will not
damage the device if moderately current limited.
GND (Pin 10): Ground Pin.
TR IN (Pins 11, 13, 15): RS232 Driver Input Pins. Inputs
are TTL/CMOS compatible. Inputs should not be allowed
to float. Tie unused inputs to VCC.
REC OUT (Pins 12, 14, 16): Receiver Outputs with TTL/
CMOS Voltage Levels. Outputs are in a high impedance
state when in the shutdown mode to allow data line
sharing. Outputs are fully short-circuit protected to ground
or VCC with power on, off or in the shutdown mode.
ON/OFF (Pin 17): Controls the operation mode of the
LT1039 and is TTL/CMOS compatible. A logic low puts the
device in the shutdown mode which reduces input supply
current to zero and places both driver and receiver outputs
in a high impedance state.
VCC (Pin 18): 5V Power for Receivers.
5
LT1039/LT1039-16
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APPLICATIONS INFORMATION
The driver output stage of the LT1039 offers significantly
improved protection over older bipolar and CMOS designs. In addition to current limiting, the driver output
can be externally forced to ±30V with no damage or
excessive current flow, and will not disrupt the supplies.
Sharing a Receiver Line
RS232
INPUT A
LT1039 #1
RECEIVER
RS232
INPUT B
LT1039 #2
RECEIVER
LT1039 Driver
30V
LOGIC
OUTPUT
LT1039
OUTPUT CAN
BE FORCED
EXTERNALLY
– 30V
LOGIC
INVERTER
1039 AI01
Some drivers have diodes connected between the outputs and the supplies, so externally applied voltages can
cause excessive supply voltage to develop
ON/OFF
(CHANNEL SELECT)
INPUT
1039 AI04
Transceiver
Older RS232 Drivers and Other CMOS Drivers
V+
WITH SOME DRIVERS,
EXTERNALLY APPLIED
VOLTAGE CAN FORCE
THE SUPPLIES
V–
LOGIC
TRANSMIT/RECEIVE
LINE
LT1039 #2
RECEIVER
1039 AI02
Placing the LT1039 in the shutdown mode (Pin 17 low)
puts both the driver and receiver outputs in a high impedance state. This allows data line sharing and transceiver
applications.
RS232
TRANSMIT/RECEIVE
LINE
LT1039 #1
DRIVER
LOGIC
INVERTER
ON/OFF
(TRANSMIT/RECEIVE)
INPUT
1039 AI05
Sharing a Transmitter Line
The shutdown mode also drops all supply currents (VCC,
V +, V –) to zero for power conscious systems.
LOGIC
INPUT A
LT1039 #1
DRIVER
LOGIC
INPUT B
LT1039 #2
DRIVER
RS232
TRANSMISSION
LINE
LOGIC
INVERTER
ON/OFF
(CHANNEL SELECT)
INPUT
6
1039 AI03
LT1039/LT1039-16
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APPLICATIONS INFORMATION
When driving CMOS logic from a receiver that will be used
in the shutdown mode and there is no other active receiver
on the line, a 51k resistor can be placed from the logic input
to VCC to force a definite logic level when the receiver
output is in a high impedance state.
Driving CMOS Logic from a Receiver
CMOS
LOGIC
LT1039
RECEIVER
RS232
INPUT
Input Overvoltage Protection
RECEIVER
1k
30k
30V
5.6k
25k
2 BIAS
1039A AI06
To protect against receiver input overloads in excess of
±30V, a voltage clamp can be placed on the data line and
still maintain RS232 compatibility.
RS232
INPUT
LOGIC
SHUTDOWN
INPUT
LOGIC
OUTPUT
*FORCES LOGIC INPUT STATE
WHEN VON/OFF IS LOW
ON/OFF
INPUT
The BIAS pin is used to “keep alive” one receiver while in
the shutdown mode (all other circuitry being inactive).
This allows a system to be in shutdown and still have one
active receiver for transferring data.
Keeping Alive One Receiver While in Shutdown
VCC
51k*
Driver inputs should not be allowed to float. Any unused
inputs should be tied to VCC.
LOGIC
OUTPUT
RS232
INPUT
ON/OFF
3
17
16 LOGIC
OUTPUT
LT1039
1039 AI09
It can also be used to make an RS232 compatible shutdown control line. Driving the BIAS pin low through a
resistance of 24k to 30k keeps the receiver active. Do not
drive the BIAS pin directly from a logic output without the
series resistor. An unused BIAS pin should be left open.
30V
1039 AI07
The receiver input impedance of the LT1039 is nominally
30kΩ. For applications requiring a 5kΩ input impedance,
a 5.6k resistor can be connected from the receiver input to
ground.
5kΩ Impedance Matching
RS232 Compatible Shutdown Control Line
25k
2 BIAS
RS232
SHUTDOWN
INPUT
ON/OFF
3
17
16
LT1039
1039A AI10
RECEIVER
RS232
INPUT
30k
5.6k
LOGIC
OUTPUT
1039 AI08
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LT1039/LT1039-16
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PACKAGE DESCRIPTION
Dimensions in inches (millimeters) unless otherwise noted.
J Package
16-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
CORNER LEADS OPTION
(4 PLCS)
0.840
(21.336)
MAX
0.005
(0.127)
MIN
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
0.045 – 0.068
(1.143 – 1.727)
FULL LEAD
OPTION
16
15
14
12
13
10
11
9
0.220 – 0.310
(5.588 – 7.874)
0.025
(0.635)
RAD TYP
2
1
3
5
4
6
7
8
0.200
(5.080)
MAX
0.300 BSC
(0.762 BSC)
0.015 – 0.060
(0.380 – 1.520)
0.008 – 0.018
(0.203 – 0.457)
0° – 15°
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
0.045 – 0.068
(1.143 – 1.727)
0.125
(3.175)
MIN
0.100 ± 0.010
(2.540 ± 0.254)
0.014 – 0.026
(0.360 – 0.660)
J16 1197
J Package
18-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
CORNER LEADS OPTION
(4 PLCS)
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
0.045 – 0.068
(1.143 – 1.727)
FULL LEAD
OPTION
0.005
(0.127)
MIN
0.960
(24.384)
MAX
18
17
16
15
14
13
12
11
10
0.220 – 0.310
(5.590 – 7.870)
0.025
(0.635)
RAD TYP
1
2
3
4
5
6
7
8
9
0.200
(5.080)
MAX
0.300 BSC
(0.762 BSC)
0.015 – 0.060
(0.380 – 1.520)
0.008 – 0.018
(0.203 – 0.457)
0° – 15°
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
0.125
(3.175)
MIN
0.045 – 0.068
(1.143 – 1.727)
0.100 ± 0.010
(2.540 ± 0.254)
0.014 – 0.026
(0.360 – 0.660)
J18 1197
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LT1039/LT1039-16
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PACKAGE DESCRIPTION
Dimensions in inches (millimeters) unless otherwise noted.
N Package
16-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.770*
(19.558)
MAX
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
0.255 ± 0.015*
(6.477 ± 0.381)
0.130 ± 0.005
(3.302 ± 0.127)
0.300 – 0.325
(7.620 – 8.255)
0.020
(0.508)
MIN
0.009 – 0.015
(0.229 – 0.381)
(
+0.035
0.325 –0.015
8.255
+0.889
–0.381
0.045 – 0.065
(1.143 – 1.651)
)
0.065
(1.651)
TYP
0.125
(3.175)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
0.100 ± 0.010
(2.540 ± 0.254)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
N16 1197
N Package
18-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.900*
(22.860)
MAX
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
0.255 ± 0.015*
(6.477 ± 0.381)
0.130 ± 0.005
(3.302 ± 0.127)
0.300 – 0.325
(7.620 – 8.255)
0.009 – 0.015
(0.229 – 0.381)
+0.035
0.325 –0.015
0.045 – 0.065
(1.143 – 1.651)
0.020
(0.508)
MIN
0.065
(1.651)
TYP
0.005
(0.127)
MIN
0.100 ± 0.010
(2.540 ± 0.254)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
(
+0.889
8.255
–0.381
)
0.125
(3.175)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
N18 1197
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LT1039/LT1039-16
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PACKAGE DESCRIPTION
Dimensions in inches (millimeters) unless otherwise noted.
SW Package
16-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
0.398 – 0.413*
(10.109 – 10.490)
16
15
14
13
12
11
10
9
0.394 – 0.419
(10.007 – 10.643)
NOTE 1
1
0.291 – 0.299**
(7.391 – 7.595)
2
3
4
5
6
7
0.093 – 0.104
(2.362 – 2.642)
0.010 – 0.029 × 45°
(0.254 – 0.737)
8
0.037 – 0.045
(0.940 – 1.143)
0° – 8° TYP
0.009 – 0.013
(0.229 – 0.330)
NOTE 1
0.016 – 0.050
(0.406 – 1.270)
0.050
(1.270)
TYP
0.014 – 0.019
(0.356 – 0.482)
TYP
NOTE:
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
*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
10
0.004 – 0.012
(0.102 – 0.305)
S16 (WIDE) 0396
LT1039/LT1039-16
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PACKAGE DESCRIPTION
Dimensions in inches (millimeters) unless otherwise noted.
SW Package
18-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
0.447 – 0.463*
(11.354 – 11.760)
18
17
16
15
14
13
12
11
10
0.394 – 0.419
(10.007 – 10.643)
SEE NOTE
0.291 – 0.299**
(7.391 – 7.595)
1
2
3
4
5
6
7
8
9
0.093 – 0.104
(2.362 – 2.642)
0.010 – 0.029 × 45°
(0.254 – 0.737)
0.037 – 0.045
(0.940 – 1.143)
0° – 8° TYP
0.009 – 0.013
(0.229 – 0.330)
NOTE 1
0.016 – 0.050
(0.406 – 1.270)
0.050
(1.270)
TYP
0.004 – 0.012
(0.102 – 0.305)
0.014 – 0.019
(0.356 – 0.482)
TYP
NOTE:
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
S18 (WIDE) 0396
*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
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LT1039/LT1039-16
U
TYPICAL APPLICATION
LT1080A (Driver/Receiver with Power Supply) Driving an LT1039
SHUTDOWN
5V
18
ON/OFF
VCC
LT1080A
17
18
VCC
ON/OFF
LT1039
17
TTL IN
RS232 OUT
TTL IN
RS232 OUT
TTL IN
RS232 OUT
TTL IN
RS232 OUT
TTL IN
RS232 OUT
RS232 IN
TTL OUT
RS232 IN
TTL OUT
5k
30k
RS232 IN
TTL OUT
RS232 IN
TTL OUT
5k
1µF
+
1µF
2
C1+
4
C1–
5
C2+
6
C2–
RS232 IN
TTLOUT
GND
V+
3
V–
7
16
+
1µF
1
V+
9
V–
1µF
+
+
30k
30k
GND
10
1039 TA03
RELATED PARTS
PART NUMBER
®
DESCRIPTION
COMMENTS
LTC 485
Low Power RS485 Transceiver
Industry Standard
LT1039A/LT1039A-16
Triple RS232 Driver/Receiver with Shutdown
±15kV ESD Protection
LT1137A
5V 3-Driver/5-Receiver RS232 Transceiver
±15kV ESD Protection
LT1180A/LT1181A
5V 2-Driver/2-Receiver RS232 Transceiver
Industry Standard, 0.1µF Capacitors
LTC1345
V.35 Transceiver
Single 5V Supply Using 0.1µF Capacitors
LTC1348
3.3V 3-Driver/5-Receiver RS232 Transceiver
Operates from 3.3V to 5V Supplies, 5 Receivers Active in Shutdown
12
Linear Technology Corporation
1039fc LT/TP 0599 2K REV C • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 ● FAX: (408) 434-0507 ● www.linear-tech.com
 LINEAR TECHNOLOGY CORPORATION 1991
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