LT1039A/LT1039A-16
Triple RS232 Driver/Receiver
with Shutdown
Features
Description
On-Chip ESD Protection:
±15kV Human Body Model
±15kV IEC-1000-4-2 Air Gap Test**
±8kV IEC-1000-4-2 Contact Test
n 125kBd Operation with 3kΩ/2500pF Load
n 250kBd Operation with 3kΩ/1000pF Load
n Outputs Can Be Driven ±30V Without Damage
n No Supply Current in Shutdown
n Operates from ±5V to ±15V Supplies
n Fully Protected Against Overload
n Three-State Outputs; Outputs Open When Off
n Bipolar Circuit—No Latchup
n ±30V Input Range
n Triple Driver/Receiver
n 30kΩ Input Impedance
n Meets All RS232 Specifications
n 16-Pin Version—Pin Compatible with MC145406
n Available in SO Package
The LTC®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.
n
Applications
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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
RS232 Interface
Terminals
n Modems
n
n
Typical Application
BIAS*
RS232 IN
1
2
V+
LT1039A
VCC
18
17
16
3
LOGIC
30k
RS232 OUT
50Ω**
RS232 IN
*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
4
15
5
14
LOGIC
LOGIC
30k
6
13
7
12
LOGIC
LOGIC
30k
11
8
9
V–
GND
Driver Output Swing
5V
ON/OFF
LOGIC
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
12V
V+
– 0.4
– 0.8
–1.2
–1.6
– 2.0
10
1039A TA01
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 TA02
1039afb
For more information www.linear.com/1039
1
LT1039A/LT1039A-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
LT1039AC................................................. 0°C to 70°C
LT1039AM (OBSOLETE).................... –55°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................... 300°C
Pin Configuration
TOP VIEW
TOP VIEW
V+
1
18 VCC
BIAS
2
17 ON/OFF
REC1 IN
3
16 REC1 OUT
TR1 OUT
4
15 TR1 IN
14 REC2 OUT
V+
1
16 VCC
REC1 IN
2
15 REC1 OUT
REC2 IN
5
TR1 OUT
3
14 TR1 IN
TR2 OUT
6
13 TR2 IN
REC2 IN
4
13 REC2 OUT
REC3 IN
7
12 REC3 OUT
TR2 OUT
5
12 TR2 IN
TR3 OUT
8
11 TR3 IN
REC3 IN
6
11 REC3 OUT
V–
9
10 GND
TR3 OUT
7
10 TR3 IN
V–
8
9
N PACKAGE
SW PACKAGE
18-LEAD PDIP
18-LEAD PLASTIC SO
TJMAX = 125°C, qJA = 79°C/W, qJC = 36°C/W (N)
TJMAX = 125°C, qJA = 90°C/W, qJC = 26°C/W (SW)
GND
N PACKAGE
SW PACKAGE
16-LEAD PDIP
16-LEAD PLASTIC SO
TJMAX = 125°C, qJA = 90°C/W, qJC = 50°C/W (N)
TJMAX = 125°C, qJA = 95°C/W, qJC = 27°C/W (SW)
J PACKAGE
18-LEAD CERDIP
TJMAX = 150°C, qJA = 88°C/W, qJC = 22°C/W (J)
OBSOLETE PACKAGE
Consider the N Package for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT1039ACSW16#PBF
LT1039ACSW16#TRPBF
LT1039ACSW16
16-Lead Plastic SO (Wide)
0°C to 70°C
LT1039ACSW#PBF
LT1039ACSW #TRPBF
LT1039ACSW
18-Lead Plastic SO (Wide)
0°C to 70°C
LT1039ACN16#PBF
N/A
LT1039ACN16
16-Lead Plastic PDIP
0°C to 70°C
LT1039ACN#PBF
N/A
LT1039ACN
18-Lead Plastic PDIP
0°C to 70°C
OBSOLETE PACKAGE
LT1039AMJ#PBF
LT1039AMJ#TRPBF
18-Lead CERDIP
–55°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
2
1039afb
For more information www.linear.com/1039
LT1039A/LT1039A-16
Electrical Characteristics
The l 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
Load = 3k to Ground
Positive
Negative
l
l
Logic Input Voltage Levels
Input Low Level (VOUT = High)
Input High Level (VOUT = Low)
l
l
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
l
l
Supply Leakage Current
Shutdown (Note 3)
Slew Rate
RL = 3k, CL = 51pF to 2500pF
Supply Current
VOUT = Low
V+ – 2.0 V+ – 1.3
V– + 1.5 V– + 1.0
2.0
20
–15
4
Prop Delay (tPLH)
(tPHL)
V
V
1.4
1.4
0.8
V
V
1
5
20
20
µA
µA
30
–30
mA
mA
10
200
µA
1
100
µA
15
30
V/µs
1
5
mA
0.6
0.8
1.2
1.2
µs
µs
Receiver VCC = 5V, VON/OFF = 2.5V (Note 2)
l
l
0.5
1.3
1.7
2.8
V
V
Hysteresis
l
0.1
0.4
1.0
V
Input Resistance
l
Input Voltage Thresholds
Input Low Level (VOUT = High)
Input High Level (VOUT = Low)
30
kΩ
Output Voltage
Output Low, IOUT = –1.6mA
Output High, IOUT = 160µA
l
l
3.5
0.4
4.8
Output Short-Circuit Current
Sourcing Current, VOUT = VCC
Sinking Current, VOUT = 0V
l
l
–10
15
–30
25
Output Leakage Current
Shutdown (Note 2), 0V ≤ VOUT ≤ VCC, VIN = 0V
l
1
10
µA
Supply Current
(Note 5)
l
2
5
mA
Supply Leakage Current
Shutdown (Note 3)
l
1
100
µA
ON/OFF Pin Current
0V ≤ VON/OFF ≤ 5V
l
80
µA
200
300
600
600
ns
ns
Prop Delay (tPLH)
(tPHL)
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: VON/OFF = 5V for LT1039AM grade devices.
–15
0.5
V
V
mA
mA
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.
Note 4: For TA ≥ 100°C leakage current is 350µA max.
Note 5: Bias pin open on 18-pin version.
1039afb
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3
LT1039A/LT1039A-16
Typical Performance Characteristics
Driver Output Short-Circuit Current
45
2.75
4.5
2.50
4.0
INPUT VOLTAGE (V)
SINKING
30
25
SOURCING
20
15
2.25
1.75
1.50
1.25
10
1.00
5
0.75
50
25
0
75
TEMPERATURE (°C)
100
INPUT HIGH
2.00
INPUT LOW
0.50
–55 –25
125
50
25
0
75
TEMPERATURE (°C)
1039A G01
SUPPLY CURRENT (nA)
OUTPUT LEAKAGE CURRENT (µA)
100
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
35
30
25
20
15
10
5
0
–5
4
5
1039A G07
4
MINIMUM OFF VOLTAGE
0
–55 –25
125
50
25
0
75
TEMPERATURE (°C)
100
125
1039A G03
Receiver Output
Short-Circuit Current
100
VOUT
– 30V
10
100
40
35
30
SOURCING
25
20
15
10
VOUT
30V
0
25
50
75
TEMPERATURE (°C)
SINKING
45
5
0
–55 –25
125
50
25
0
75
TEMPERATURE (°C)
1039A G05
ON/OFF Pin Current vs Voltage
2
3
INPUT VOLTAGE (V)
1.0
50
1
–55 –25
125
40
1
MINIMUM ON VOLTAGE
1.5
60
1039A G04
0
2.0
55
10
–10
100
1000
100
0
25
50
75
TEMPERATURE (°C)
2.5
Driver Output Leakage
in Shutdown
SUPPLY CURRENT MEASURED
INTO VCC AND V +
1
–55 –25
3.0
1039A G02
Supply Current in Shutdown
1000
3.5
0.5
OUTPUT CURRENT (mA)
35
ON/OFF PIN VOLTAGE (V)
5.0
0
–55 –25
INPUT CURRENT (µA)
ON/OFF Pin Thresholds
3.00
40
OUTPUT CURRENT (mA)
Receiver Input Thresholds
50
V+
– 0.4
Output Waveforms
RECEIVER
OUTPUT
–1.2
DRIVER
OUTPUT
–1.6
– 2.0
5V
0V
10V
0V
–10V
INPUT
1.2
5V
0V
0.8
0.4
V–
125
1039A G06
Driver Output Swing vs Current
– 0.8
100
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT CURRENT (mA)
V+ = 12V
V – = –12V
VCC = 5V
RL = 3k
2µs/DIV
1039A G09
DRIVER OUTPUT CONNECTED TO RECEIVER INPUT
1039A G08
1039afb
For more information www.linear.com/1039
LT1039A/LT1039A-16
Typical Performance Characteristics
Shutdown to Driver Output
10V
RECEIVER
5V
OUTPUT
0V
OUTPUT
HIGH
0V
DRIVER
OUTPUT –5V
–10V
ON/OFF 5V
INPUT
0V
BIAS Pin Response Time
Shutdown to Receiver Output
OUTPUT
LOW
6V
6V
RECEIVER 1
4V
OUTPUT
2V
RECEIVER 4V
OUTPUT 2V
0V
BIAS INPUT
(THRU 25kΩ)
ON/OFF 5V
INPUT 0V
V+ = 12V
V – = –12V
RL = 3k
2µs/DIV
Pin Functions
1039A G10
0V
5V
0V
VCC = 5V
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.
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 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-
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 thepins. 0.1µF
ceramic capacitors work well.
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
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.
VCC (Pin 18): 5V Power for Receivers.
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5
LT1039A/LT1039A-16
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
1039A AI01
The driver outputs utilize high impedance overvoltage
protection, eliminating the flow of fault currents into
supplies, as will happen with conventional diode clampconfigurations.
Older RS232 Drivers and Other CMOS Drivers
V+
ON/OFF
(CHANNEL SELECT)
INPUT
LOGIC
TRANSMIT/RECEIVE
LINE
Sharing a Transmitter Line
LOGIC
INPUT A
LT1039A #1
DRIVER
LOGIC
INPUT B
LT1039A #2
DRIVER
ON/OFF
(CHANNEL SELECT)
INPUT
6
RS232
TRANSMIT/RECEIVE
LINE
LT1039A #1
DRIVER
LT1039A #2
RECEIVER
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 transceiverapplications.
1039A AI04
Transceiver
WITH SOME DRIVERS,
EXTERNALLY APPLIED
VOLTAGE CAN FORCE
THE SUPPLIES
V–
LOGIC
INVERTER
ON/OFF
(TRANSMIT/RECEIVE)
INPUT
LOGIC
INVERTER
1039A AI05
The shutdown mode also drops all supply currents (VCC,
V+, V–) to zero for power conscious systems.
RS232
TRANSMISSION
LINE
LOGIC
INVERTER
1039A AI03
1039afb
For more information www.linear.com/1039
LT1039A/LT1039A-16
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
51k*
LT1039A
RECEIVER
Input Overvoltage Protection
RS232
INPUT
RECEIVER
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.
1k
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
RS232
INPUT
Driver inputs should not be allowed to float. Any unused
inputs should be tied to VCC.
LOGIC
OUTPUT
30V
1039A AI07
RS232
INPUT
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.
RS232 Compatible Shutdown Control Line
25k
2 BIAS
RS232
SHUTDOWN
INPUT
ON/OFF
3
17
16
LT1039A
RECEIVER
5.6k
16 LOGIC
OUTPUT
1039A AI09
5kΩ Impedance Matching
30k
3
LT1039A
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.
RS232
INPUT
17
ON/OFF
1039A AI10
LOGIC
OUTPUT
1039A AI08
1039afb
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7
LT1039A/LT1039A-16
Package Description
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
J Package
18-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
CORNER LEADS OPTION
(4 PLCS)
.005
(0.127)
MIN
.023 – .045
(0.584 – 1.143)
HALF LEAD
OPTION
.960
(24.384)
MAX
18
17
16
15
14
13
12
11
10
.220 – .310
(5.590 – 7.870)
.025
(0.635)
RAD TYP
.045 – .065
(1.143 – 1.650)
FULL LEAD
OPTION
1
2
3
4
5
6
7
8
9
.200
(5.080)
MAX
.300 BSC
(7.62 BSC)
.015 – .060
(0.380 – 1.520)
.008 – .018
(0.203 – 0.457)
0° – 15°
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
.125
(3.175)
MIN
.045 – .065
(1.143 – 1.651)
.014 – .026
(0.360 – 0.660)
.100
(2.54)
BSC
J18 0801
OBSOLETE PACKAGE
8
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LT1039A/LT1039A-16
Package Description
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
N Package
16-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510 Rev I)
.770*
(19.558)
MAX
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
.255 ±.015*
(6.477 ±0.381)
.300 – .325
(7.620 – 8.255)
.008 – .015
(0.203 – 0.381)
(
+.035
.325 –.015
+0.889
8.255
–0.381
NOTE:
1. DIMENSIONS ARE
)
.130 ±.005
(3.302 ±0.127)
.045 – .065
(1.143 – 1.651)
.020
(0.508)
MIN
.065
(1.651)
TYP
.120
(3.048)
MIN
.100
(2.54)
BSC
.018 ±.003
(0.457 ±0.076)
N16 REV I 0711
INCHES
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
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9
LT1039A/LT1039A-16
Package Description
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
N Package
18-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510 Rev I)
.920*
(23.368)
MAX
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
.255 ±.015*
(6.477 ±0.381)
.300 – .325
(7.620 – 8.255)
.008 – .015
(0.203 – 0.381)
(
+.035
.325 –.015
8.255
+0.889
–0.381
)
.130 ±.005
(3.302 ±0.127)
.045 – .065
(1.143 – 1.651)
.020
(0.508)
MIN
.065
(1.651)
TYP
.120
(3.048)
MIN
.005
(0.127)
MIN
.100
(2.54)
BSC
.018 ±.003
(0.457 ±0.076)
N18 REV I 0711
NOTE:
1. DIMENSIONS ARE
INCHES
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
10
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LT1039A/LT1039A-16
Package Description
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
SW Package
16-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
.050 BSC .045 ±.005
.030 ±.005
TYP
.398 – .413
(10.109 – 10.490)
NOTE 4
16
N
15
14
13
12
11
10
9
N
.325 ±.005
.420
MIN
.394 – .419
(10.007 – 10.643)
NOTE 3
1
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
1
.005
(0.127)
RAD MIN
.009 – .013
(0.229 – 0.330)
NOTE:
1. DIMENSIONS IN
.291 – .299
(7.391 – 7.595)
NOTE 4
.010 – .029 × 45°
(0.254 – 0.737)
2
3
4
5
6
.093 – .104
(2.362 – 2.642)
7
8
.037 – .045
(0.940 – 1.143)
0° – 8° TYP
NOTE 3
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.356 – 0.482)
TYP
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. 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
4. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
.004 – .012
(0.102 – 0.305)
S16 (WIDE) 0502
1039afb
For more information www.linear.com/1039
11
LT1039A/LT1039A-16
Package Description
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
SW Package
18-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
.050 BSC .045 ±.005
.030 ±.005
TYP
.447 – .463
(11.354 – 11.760)
NOTE 4
N
18
16
15
14
13
12
11
10
N
.325 ±.005
.420
MIN
17
.394 – .419
(10.007 – 10.643)
NOTE 3
1
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
.005
(0.127)
RAD MIN
.009 – .013
(0.229 – 0.330)
NOTE:
1. DIMENSIONS IN
.291 – .299
(7.391 – 7.595)
NOTE 4
.010 – .029 × 45°
(0.254 – 0.737)
1
2
3
4
5
6
7
.093 – .104
(2.362 – 2.642)
9
.037 – .045
(0.940 – 1.143)
0° – 8° TYP
NOTE 3
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.356 – 0.482)
TYP
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. 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
4. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
12
8
.004 – .012
(0.102 – 0.305)
S18 (WIDE) 0502
1039afb
For more information www.linear.com/1039
LT1039A/LT1039A-16
Revision History
(Revision history begins at Rev B)
REV
DATE
DESCRIPTION
B
12/12
Removed LT1039AI from Abs Max Ratings and Package/Order Information
PAGE NUMBER
Updated N and SW Package Descriptions
2
9-12
1039afb
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.
13
LT1039A/LT1039A-16
Typical Application
LT1180A (Driver/Receiver with Power Supply) Driving an LT1039A
SHUTDOWN
18
ON/OFF
VCC
LT1039A
5V
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
RS232 IN
TTL OUT
TTL OUT
RS232 IN
30k
TTL OUT
0.1µF
0.1µF
+
+
RS232 IN
2
C+
4
C–
5
6
30k
RS232 IN
30k
TTL OUT
C+
C–
TTL OUT
30k
GND
3
V+
7
V–
RS232 IN
1
+
16
0.1µF
+
9
0.1µF
30k
V+
V–
GND
10
1039A TA03
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LTC2870/LTC2871
RS232/RS485 Multiprotocol Transceivers with Integrated Termination 20Mbps RS485 and 500kbps RS232,
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±60V Fault Protected 3V to 5.5V RS485/RS422 Transceivers
14 Linear Technology Corporation
20Mbps or 250kbps ±15kV HBM ESD,
±25V Common Mode Range
1039afb
LT 0213 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 ● FAX: (408) 434-0507 ● www.linear.com/1039
LINEAR TECHNOLOGY CORPORATION 2001
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