LINER LT1039ACN16 Triple rs232 driver/receiver with shutdown Datasheet

LT1039A/LT1039A-16
Triple RS232 Driver/Receiver
with Shutdown
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DESCRIPTIO
FEATURES
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■
■
■
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On-Chip ESD Protection:
±15kV Human Body Model
±15kV IEC-1000-4-2 Air Gap Test**
±8kV IEC-1000-4-2 Contact Test
125kBd Operation with 3kΩ/2500pF Load
250kBd Operation with 3kΩ/1000pF Load
Outputs Can Be Driven ±30V Without Damage
No Supply Current in Shutdown
Operates from ±5V to ±15V Supplies
Fully Protected Against Overload
Three-State Outputs; Outputs Open When Off
Bipolar Circuit—No Latchup
±30V Input Range
Triple Driver/Receiver
30kΩ Input Impedance
Meets All RS232 Specifications
16-Pin Version—Pin Compatible with MC145406
Available in SO Package
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APPLICATIO S
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The LT ®1039A 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. On-chip ESD
protection eliminates the need for external protection
devices.
A bias pin allows one receiver to be kept on while the rest
of the part is shut down.
The LT1039A 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 LT1180A/LT1181A and LT1130A data
sheets.
, LTC and LT are registered trademarks of Linear Technology Corporation.
RS232 Interface
Terminals
Modems
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TYPICAL APPLICATIO
BIAS*
RS232 IN
1
V+
2
LT1039A
VCC
18
17
16
3
5V
LOGIC
30k
50Ω**
RS232 OUT
RS232 IN
4
15
5
14
LOGIC
LOGIC
30k
*BIAS PIN USED
50Ω**
TO KEEP THE
RS232 OUT
RECEIVER ON
WHILE IN SHUTDOWN
RS232 IN
**50Ω RESISTORS
MAY BE REQUIRED
50Ω**
FOR IEC-1000-4-2
RS232 OUT
ESD PROTECTION
DEPENDING UPON
– 12V
PC BOARD AND
CONNECTOR LEAD LENGTH
6
13
7
12
LOGIC
LOGIC
30k
11
8
9
V–
GND
10
Driver Output Swing
ON/OFF
LOGIC
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
12V
V+
– 0.4
– 0.8
–1.2
–1.6
– 2.0
1.2
0.8
0.4
V–
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT CURRENT (mA)
1039A TA01
1039A TA02
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LT1039A/LT1039A-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
LT1039AC ............................................... 0°C to 70°C
LT1039AI ........................................... – 40°C to 85°C
LT1039AM (OBSOLETE) ............. – 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
LT1039ACN16
LT1039ACSW16
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
N PACKAGE
16-LEAD PDIP
Consult Factory
for Availability
GND
SW PACKAGE
16-LEAD PLASTIC SO
TOP VIEW
ORDER PART
NUMBER
V+
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
N PACKAGE
18-LEAD PDIP
LT1039ACN
LT1039ACSW
LT1039AIN
LT1039AISW
SW PACKAGE
18-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 79°C/ W, θJC = 36°C/ W (N)
TJMAX = 125°C, θJA = 90°C/ W, θJC = 26°C/ W (SW)
TJMAX = 125°C, θJA = 90°C/ W, θJC = 50°C/ W (N)
TJMAX = 125°C, θJA = 95°C/ W, θJC = 27°C/ W (SW)
J PACKAGE
18-LEAD CERDIP
TJMAX = 150°C, θJA = 88°C/ W, θJC = 22°C/ W (J)
LT1039AMJ
OBSOLETE PACKAGE
Consider the N Package for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes the 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 + – 2.0
V – + 1.5
V + – 1.3
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
Logic Input Current
VIN ≥ 2.0V
VIN ≤ 0.8V
Output Short-Circuit Current
Sourcing Current, VOUT = 0V
Sinking Current, VOUT = 0V
20
– 15
30
– 30
V
V
mA
mA
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LT1039A/LT1039A-16
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
MIN
Output Leakage Current
Shutdown (Notes 3, 4), VOUT = ±18V, VIN = 0V
●
Supply Leakage Current
Shutdown (Note 3)
●
Slew Rate
RL = 3k, CL = 51pF to 2500pF
Supply Current
VOUT = Low
4
Prop Delay (tPLH)
(tPHL)
TYP
MAX
UNITS
10
200
µA
1
100
µA
15
30
V/µs
1
5
mA
0.6
0.8
1.2
1.2
µs
µs
1.3
1.7
2.8
V
V
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
●
●
0.5
●
0.1
0.4
●
30
Output Low, IOUT = – 1.6mA
Output High, IOUT = 160µA
●
●
3.5
0.4
4.8
Output Short-Circuit Current
Sourcing Current, VOUT = VCC
Sinking Current, VOUT = 0V
●
●
– 10
15
– 30
25
Output Leakage Current
Shutdown (Note 2), 0V ≤ VOUT ≤ VCC, VIN = 0V
●
1
10
µA
Supply Current
(Note 5)
●
2
5
mA
Supply Leakage Current
Shutdown (Note 3)
●
1
100
µA
ON/OFF Pin Current
0V ≤ VON/OFF ≤ 5V
●
80
µA
600
600
ns
ns
Output Voltage
kΩ
0.5
mA
mA
– 15
Prop Delay (tPLH)
(tPHL)
200
300
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: VON/OFF = 5V for LT1039AM 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 LT1039A-16 part.
V
V
Note 4: For TA ≥ 100°C leakage current is 350µA max.
Note 5: Bias pin open on 18-pin version.
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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
SINKING
30
25
SOURCING
20
15
2.25
ON/OFF PIN VOLTAGE (V)
3.00
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Driver Output Short-Circuit Current
50
INPUT HIGH
2.00
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
1039A G01
0.50
–55 –25
50
25
0
75
TEMPERATURE (°C)
100
125
1039A G02
MINIMUM ON VOLTAGE
1.5
MINIMUM OFF VOLTAGE
0
–55 –25
50
25
0
75
TEMPERATURE (°C)
100
125
1039A G03
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TYPICAL PERFORMANCE CHARACTERISTICS
Driver Output Leakage
in Shutdown
Supply Current in Shutdown
1000
60
1000
SUPPLY CURRENT MEASURED
INTO VCC AND V +
55
100
10
1
–55 –25
0
25
50
75
TEMPERATURE (°C)
100
50
OUTPUT CURRENT (mA)
OUTPUT LEAKAGE CURRENT (µA)
SUPPLY CURRENT (nA)
Receiver Output
Short-Circuit Current
100
VOUT
– 30V
10
125
0
25
50
75
TEMPERATURE (°C)
100
1039A G04
ON/OFF Pin Current vs Voltage
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
INPUT CURRENT (µA)
30
25
20
15
10
5
0
–5
1
2
3
INPUT VOLTAGE (V)
35
30
25
20
15
5
125
0
–55 –25
4
100
125
V+
– 0.4
– 0.8
–1.2
–1.6
– 2.0
1.2
0.8
0.4
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)
1039A TA02
Output Waveforms
DRIVER
OUTPUT
50
25
0
75
TEMPERATURE (°C)
1039A G06
1039A G07
RECEIVER
OUTPUT
SOURCING
Driver Output Swing vs Current
35
0
40
1039A G05
40
–10
SINKING
10
VOUT
30V
1
–55 –25
45
Shutdown to Driver Output
10V
5V
0V
10V
DRIVER
OUTPUT
OUTPUT
HIGH
5V
0V
0V
0V
–10V
5V
INPUT
0V
DRIVER
OUTPUT
OUTPUT
LOW
– 5V
– 10V
V + = 12V
V – = –12V
VCC = 5V
RL = 3k
2µs/DIV
1039A G09
ON/OFF
INPUT
5V
0V
V + = 12V
V – = –12V
RL = 3k
2µs/DIV
1039A G10
DRIVER OUTPUT CONNECTED TO RECEIVER INPUT
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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
2ms/DIV
1039A G11
VCC = 5V
0.2µs/DIV
1039A 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 LT1309A is in
the shutdown mode. Leave BIAS pin open when not in use.
See Applications Information for proper use.
output pins are internally protected from ESD transients.
In order to insure proper functioning of the ESD protection devices, the V + and V – supply pins must be
bypassed with low ESR capacitors located close to the
pins. 0.1µF ceramic capacitors work well.
GND (Pin 10): Ground Pin.
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.
Receiver input pins are internally protected from ESD
transients. In order to insure proper functioning of the ESD
protection devices, the VCC and V – supply pins must be
bypassed with low ESR capacitors located close to the
pins. A 0.1µF ceramic capacitor works well.
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.
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. Driver
ON/OFF (Pin 17): Controls the operation mode of the
LT1039A 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.
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.
VCC (Pin 18): 5V Power for Receivers.
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LT1039A/LT1039A-16
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APPLICATIONS INFORMATION
The driver output stage of the LT1039A 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.
Sharing a Receiver Line
RS232
INPUT A
LT1039A #1
RECEIVER
RS232
INPUT B
LT1039A #2
RECEIVER
LT1039A Driver
30V
LOGIC
OUTPUT
LT1039A
OUTPUT CAN
BE FORCED
EXTERNALLY
– 30V
LOGIC
INVERTER
1039A AI01
The driver outputs utilize high impedance overvoltage
protection, eliminating the flow of fault currents into
supplies, as will happen with conventional diode clamp
configurations.
Older RS232 Drivers and Other CMOS Drivers
V+
ON/OFF
(CHANNEL SELECT)
INPUT
Transceiver
LOGIC
TRANSMIT/RECEIVE
LINE
WITH SOME DRIVERS,
EXTERNALLY APPLIED
VOLTAGE CAN FORCE
THE SUPPLIES
V–
LOGIC
INPUT B
LT1039A #2
DRIVER
LT1039A #2
RECEIVER
LOGIC
INVERTER
ON/OFF
(TRANSMIT/RECEIVE)
INPUT
1039A AI05
The shutdown mode also drops all supply currents (VCC,
V +, V –) to zero for power conscious systems.
Sharing a Transmitter Line
LT1039A #1
DRIVER
RS232
TRANSMIT/RECEIVE
LINE
LT1039A #1
DRIVER
1039A AI02
Placing the LT1039A 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.
LOGIC
INPUT A
1039A AI04
RS232
TRANSMISSION
LINE
LOGIC
INVERTER
ON/OFF
(CHANNEL SELECT)
INPUT
1039A AI03
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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
RS232
INPUT
CMOS
LOGIC
LT1039A
RECEIVER
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
LT1039A
1039A 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
1039A AI07
The receiver input impedance of the LT1039A 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
LT1039A
1039A AI10
RECEIVER
RS232
INPUT
30k
5.6k
LOGIC
OUTPUT
1039A AI08
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LT1039A/LT1039A-16
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PACKAGE DESCRIPTION
J Package
18-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference 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 – 0.065
(1.143 – 1.651)
0.014 – 0.026
(0.360 – 0.660)
0.100
(2.54)
BSC
J18 1298
OBSOLETE PACKAGE
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LT1039A/LT1039A-16
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PACKAGE DESCRIPTION
N Package
16-Lead PDIP (Narrow .300 Inch)
(Reference 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
(2.54)
BSC
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
N16 1098
N Package
18-Lead PDIP (Narrow .300 Inch)
(Reference 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
)
0.020
(0.508)
MIN
0.065
(1.651)
TYP
0.125
(3.175)
MIN
0.005
(0.127)
MIN
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
8.255
+0.889
–0.381
0.045 – 0.065
(1.143 – 1.651)
0.100
(2.54)
BSC
0.018 ± 0.003
(0.457 ± 0.076)
N18 1098
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PACKAGE DESCRIPTION
SW Package
16-Lead Plastic Small Outline (Wide .300 Inch)
(Reference 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)
BSC
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
S16 (WIDE) 1098
*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
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PACKAGE DESCRIPTION
SW Package
18-Lead Plastic Small Outline (Wide .300 Inch)
(Reference 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)
NOTE 1
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)
BSC
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) 1098
*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
1039afa
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
LT1039A/LT1039A-16
U
TYPICAL APPLICATION
LT1180A (Driver/Receiver with Power Supply) Driving an LT1039A
SHUTDOWN
5V
18
ON/OFF
VCC
LT1039A
17
18
VCC
ON/OFF
LT1039A
17
TTL IN
RS232 OUT
TTL IN
RS232 OUT
TTL IN
RS232 OUT
TTL IN
RS232 OUT
TTL IN
RS232 OUT
TTL OUT
RS232 IN
TTL OUT
RS232 IN
30k
30k
TTL OUT
+
0.1µF
+
0.1µF
RS232 IN
2
C+
4
C–
5
C+
6
TTL OUT
RS232 IN
30k
30k
TTL OUT
C–
V+
3
V–
7
GND
16
+
RS232 IN
1
V+
9
V–
+
0.1µF
30k
GND
0.1µF
10
1039A TA03
RELATED PARTS
PART NUMBER
®
DESCRIPTION
COMMENTS
LTC 485
Low Power RS485 Transceiver
Industry Standard
LT1137A
5V 3 Driver/5 Receiver RS232 Transceiver
±15kV ESD Protection
LT1180A/81A
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
1039afa
12
Linear Technology Corporation
LT/LCG 1101 1.5K REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 1997
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