1
LT1039/LT1039-16
1039fd
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
RS232 Driver/Receiver
with Shutdown
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 and immune to latchup.
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 LT1080/LT1081, LT1180A/LT1181A and
LT1130A data sheets. For applications requiring 15kV
ESD, see the LT1039A.
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
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
■
RS232 Interface
■
Terminals
■
Modems
Driver Output Swing
30k
LT1039
V
+
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
V
CC
V
–
GND
12V
BIAS*
RS232 IN
ON/OFF
5V
LOGIC
LOGIC
LOGIC
LOGIC
LOGIC
LOGIC
*BIAS PIN USED
TO KEEP THE
RECEIVER ON
WHILE IN SHUTDOWN
RS232 IN
RS232 OUT
RS232 OUT
RS232 OUT
RS232 IN
–12V
1039 TA01
30k
30k
OUTPUT CURRENT (mA)
0
OUTPUT VOLTAGE (V)
–0.5
V
+
8
1039 TA02
0.5
1.0
1.5
V
–
24610
NEGATIVE
POSITIVE
2
LT1039/LT1039-16
1039fd
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
UU
ORDER PART
NUMBER ORDER PART
NUMBER
LT1039CN16
LT1039CSW16 LT1039CN
LT1039CSW
LT1039IN
LT1039ISW
1
2
3
4
5
6
7
8
9
TOP VIEW
SW PACKAGE
18-LEAD PLASTIC SO WIDE
J PACKAGE
18-LEAD CERDIP
N PACKAGE
18-LEAD PDIP
18
17
16
15
14
13
12
11
10
V+
BIAS
REC1 IN
TR1 OUT
REC2 IN
TR2 OUT
REC3 IN
TR3 OUT
V–
VCC
ON/OFF
REC1 OUT
TR1 IN
REC2 OUT
TR2 IN
REC3 OUT
TR3 IN
GND
T
JMAX
= 150°C, θ
JA
= 120°C/W(N)
T
JMAX
= 150°C, θ
JA
= 120°C/ W(SW)
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Driver V
+
= 12V, V
–
= –12V, V
ON/OFF
= 2.5V (Note 2)
Output Voltage Swing Load = 3k to Ground
Positive ●V
+
– 0.4 V
+
– 0.1 V
Negative ●V
–
+ 1.5 V
–
+ 1.0 V
Logic Input Voltage Levels Input Low Level (V
OUT
= High) ●1.4 0.8 V
Input High Level (V
OUT
= Low) ●2.0 1.4 V
Logic Input Current V
IN
≥ 2.0V 1 20 µA
V
IN
≤ 0.8V 5 20 µA
Output Short-Circuit Current Sourcing Current, V
OUT
= 0V 5 15 mA
Sinking Current, V
OUT
= 0V –5 –15 mA
Output Leakage Current Shutdown (Notes 3, 4), V
OUT
= ±18V, V
IN
= 0V ● 10 (25°C) 200 µA
Supply Leakage Current Shutdown (Note 3) ● 1 (25°C) 100 µA
Slew Rate R
L
= 3k, C
L
= 51pF 4 15 30 V/µs
Supply Current V
OUT
= Low 4 8 mA
(Note 1)
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
T
JMAX
= 150°C, θ
JA
= 100°C/ W (J) LT1039MJ16
OBSOLETE PACKAGES
Consider the N Package for Alternate Source
T
JMAX
= 150°C, θ
JA
= 100°C/ W(J)
LT1039CJ
LT1039MJ
1
2
3
4
5
6
7
8
TOP VIEW
N PACKAGE
16-LEAD PDIP SW PACKAGE
16-LEAD PLASTIC SO WIDE
J PACKAGE
16-LEAD CERDIP
16
15
14
13
12
11
10
9
V
+
REC1 IN
TR1 OUT
REC2 IN
TR2 OUT
REC3 IN
TR3 OUT
V
–
V
CC
REC1 OUT
TR1 IN
REC2 OUT
TR2 IN
REC3 OUT
TR3 IN
GND
T
JMAX
= 150°C, θ
JA
= 140°C/ W (N)
T
JMAX
= 150°C, θ
JA
= 150°C/W (SW)
CONSULT FACTORY
FOR
AVAILABILITY
Supply Voltage
Driver (V
+
, V
–
) .................................................. ±16V
Receiver (V
CC
) ....................................................... 7V
Logic Inputs ................................................... V
–
to 25V
Receiver Inputs........................................................ ±30
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
3
LT1039/LT1039-16
1039fd
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Receiver V
CC
= 5V, V
ON/OFF
= 2.5V (Note 2)
Input Voltage Thresholds Input Low Level (V
OUT
= High) ●0.5 1.3 V
Input High Level (V
OUT
= Low) ●1.7 2.8 V
Hysteresis ●0.1 0.4 1.0 V
Input Resistance ●30 kΩ
Output Voltage Output Low, I
OUT
= –1.6mA ●0.4 0.5 V
Output High, I
OUT
= 160µA●3.5 4.8 V
Output Short-Circuit Current Sourcing Current, V
OUT
= 0V (Note 5) ●0.5 1 mA
Sinking Current, V
OUT
= V
CC
● –10 mA
Output Leakage Current Shutdown (Note 2), 0V ≤ V
OUT
≤ V
CC
, V
IN
= 0V ●110µA
Supply Current ●47mA
Supply Leakage Current Shutdown (Note 3) ● 1 (25°C) 100 µA
ON/OFF Pin Current 0V ≤ V
ON/OFF
≤ 5V ●–15 80 µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device by be impaired.
Note 2: V
ON/OFF
= 5V for LT1039M grade devices.
Note 3: V
ON/OFF
= 0.4V for –55°C ≤ T
A
≤ 100°C and V
ON/OFF
= 0.2V for
100°C ≤ T
A
≤ 125°C. Does not apply to LT1039-16 part.
Note 4: For T
A
≥ 100°C, leakage current is 350µA max.
Note 5: For T
A
≤ –25°C, output source current is 0.4mA.
TYPICAL PERFORMANCE CHARACTERISTICS
UW
Driver Output Short-Circuit Current ON/OFF Pin ThresholdsReceiver Input Thresholds
TEMPERATURE (°C)
–55
0
OUTPUT CURRENT (mA)
5
15
20
25
50
35
050 75
1039 G01
10
40
45
30
–25 25 100 125
SINKING
SOURCING
TEMPERATURE (°C)
–55
0.50
INPUT VOLTAGE (V)
0.75
1.25
1.50
1.75
3.00
2.25
050 75
1039 G02
1.00
2.50
2.75
2.00
–25 25 100 125
INPUT HIGH
INPUT LOW
TEMPERATURE (°C)
–55
0
ON/OFF PIN VOLTAGE (V)
0.5
1.5
2.0
2.5
5.0
3.5
050 75
1039 G03
1.0
4.0
4.5
3.0
–25 25 100 125
MINIMUM ON VOLTAGE
MINIMUM OFF VOLTAGE
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
4
LT1039/LT1039-16
1039fd
2µs/DIV
TYPICAL PERFORMANCE CHARACTERISTICS
UW
Supply Current in Shutdown Driver Output Leakage
in Shutdown Receiver Output
Short-Circuit Current
ON/OFF Pin Current vs Voltage Driver Output Swing vs Current
Output Waveforms Shutdown to Driver Output
5V
0V
0V
INPUT
1039 G09
V
+
= 12V
V
–
= –12V
V
CC
= 5V
R
L
= 3k
0V
5V
10V
–10V
–5V
0V
0V
5V
ON/OFF
INPUT V
+
= 12V
V
–
= –12V
R
L
= 3k
1ms/DIV
OUTPUT
HIGH
OUTPUT
LOW
1039 G10
TEMPERATURE (°C)
–55 –25
SUPPLY CURRENT (nA)
10
100
1000
0 25 50 75 100 125
1039 G04
1
SUPPLY CURRENT MEASURED
INTO V
CC
AND V
+
TEMPERATURE (°C)
–55 –25
OUTPUT LEAKAGE CURRENT (µA)
10
100
1000
0 25 50 75 100 125
1039 G05
1
V
OUT
–30V
V
OUT
30V
TEMPERATURE (°C)
–55 –25
OUTPUT CURRENT (mA)
1
10
100
0 25 50 75 100 125
1039 G06
0.1
OUTPUT SINKING
OUTPUT SOURCING
INPUT VOLTAGE (V)
0
INPUT CURRENT (µA)
20
30
40
1039 G07
10
0
15
25
35
5
–5
–10 24
135
OUTPUT CURRENT (mA)
0
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
–0.4
V
+
4.0
1039 G08
0.8
1.0
–0.2
1.2
0.6
0.4
0.2
V
–
1.0 2.0 3.0
0.5 4.5
1.5 2.5 3.5 5.0
OUTPUT HIGH
OUTPUT LOW
RECEIVER
OUTPUT
DRIVER
OUTPUT
DRIVER
OUTPUT
DRIVER
OUTPUT
0V
–10V
10V
5V
DRIVER OUTPUT CONNECTED TO RECEIVER INPUT
5
LT1039/LT1039-16
1039fd
TYPICAL PERFORMANCE CHARACTERISTICS
UW
Shutdown to Receiver Output BIAS Pin Response Time
PIN FUNCTIONS
UUU
(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 pro-
vide 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 V
CC
.
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 V
CC
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.
V
CC
(Pin 18): 5V Power for Receivers.
6V
4V
2V
0V
RECEIVER
OUTPUT
5V
0V
ON/OFF
INPUT
1ms/DIV 1039 G11
V
CC
= 5V
5V
BIAS INPUT
(THRU 25kΩ)
0.2µs/DIV 1039 G12
V
CC
= 5V
0V
2V
4V
6V
RECEIVER 1
OUTPUT
0V
6
LT1039/LT1039-16
1039fd
APPLICATIONS INFORMATION
WUUU
The driver output stage of the LT1039 offers significantly
improved protection over older bipolar and CMOS de-
signs. 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.
LT1039 Driver
Some drivers have diodes connected between the out-
puts and the supplies, so externally applied voltages can
cause excessive supply voltage to develop
LT1039 #1
DRIVER
LT1039 #2
DRIVER
LOGIC
INPUT A
LOGIC
INPUT B
1039 AI03
ON/OFF
(CHANNEL SELECT)
INPUT
LOGIC
INVERTER
RS232
TRANSMISSION
LINE
Sharing a Receiver Line
WITH SOME DRIVERS,
EXTERNALLY APPLIED
VOLTAGE CAN FORCE
THE SUPPLIES
1039 AI02
V
+
V
–
Older RS232 Drivers and Other CMOS Drivers
Sharing a Transmitter Line
Placing the LT1039 in the shutdown mode (Pin 17 low)
puts both the driver and receiver outputs in a high imped-
ance state. This allows data line sharing and transceiver
applications.
–30V
30V
OUTPUT CAN
BE FORCED
EXTERNALLY 1039 AI01
LT1039
Transceiver
LT1039 #1
RECEIVER
RS232
INPUT A
RS232
INPUT B
1039 AI04
ON/OFF
(CHANNEL SELECT)
INPUT
LOGIC
INVERTER
LOGIC
OUTPUT
LT1039 #2
RECEIVER
LT1039 #1
DRIVER
LOGIC
TRANSMIT/RECEIVE
LINE
RS232
TRANSMIT/RECEIVE
LINE
1039 AI05
ON/OFF
(TRANSMIT/RECEIVE)
INPUT
LOGIC
INVERTER
LT1039 #2
RECEIVER
The shutdown mode also drops all supply currents (V
CC
,
V
+
, V
–
) to zero for power conscious systems.
7
LT1039/LT1039-16
1039fd
APPLICATIONS INFORMATION
WUUU
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 V
CC
to force a definite logic level when the receiver
output is in a high impedance state.
Keeping Alive One Receiver While in Shutdown
LT1039
25k
LOGIC
SHUTDOWN
INPUT
2
316
17
BIAS
RS232
INPUT
ON/OFF
LOGIC
OUTPUT
1039 AI09
RS232 Compatible Shutdown Control Line
LT1039
25k
2
316
17
BIAS
RS232
SHUTDOWN
INPUT
ON/OFF
1039A AI10
Driving CMOS Logic from a Receiver
LT1039
RECEIVER
RS232
INPUT
ON/OFF
INPUT
LOGIC
OUTPUT
*FORCES LOGIC INPUT STATE
WHEN V
ON/OFF
IS LOW
51k*
V
CC
1039A AI06
CMOS
LOGIC
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.
Input Overvoltage Protection
RS232
INPUT LOGIC
OUTPUT
RECEIVER
1039 AI07
30k
1k
30V
30V
5.6k
Driver inputs should not be allowed to float. Any unused
inputs should be tied to V
CC
.
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.
It can also be used to make an RS232 compatible shut-
down 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.
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
1039 AI08
RS232
INPUT LOGIC
OUTPUT
RECEIVER
30k
5.6k
8
LT1039/LT1039-16
1039fd
PACKAGE DESCRIPTION
U
J Package
16-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
J Package
18-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
J18 1197
0.015 – 0.060
(0.380 – 1.520)
0.100 ± 0.010
(2.540 ± 0.254)
0.014 – 0.026
(0.360 – 0.660)
0.045 – 0.068
(1.143 – 1.727)
0.200
(5.080)
MAX
0.125
(3.175)
MIN
0.008 – 0.018
(0.203 – 0.457) 0° – 15°
12345678
0.220 – 0.310
(5.590 – 7.870)
0.960
(24.384)
MAX
0.005
(0.127)
MIN 16 13
9
10
11
12
1415
17
18
0.025
(0.635)
RAD TYP
0.300 BSC
(0.762 BSC)
0.045 – 0.068
(1.143 – 1.727)
FULL LEAD
OPTION
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
CORNER LEADS OPTION
(4 PLCS)
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
J16 1197
0.015 – 0.060
(0.380 – 1.520)
0.100 ± 0.010
(2.540 ± 0.254)
0.014 – 0.026
(0.360 – 0.660)
0.045 – 0.068
(1.143 – 1.727)
0.200
(5.080)
MAX
0.125
(3.175)
MIN
0.008 – 0.018
(0.203 – 0.457) 0° – 15°
12345678
0.220 – 0.310
(5.588 – 7.874)
0.840
(21.336)
MAX
0.005
(0.127)
MIN 16 13 9
10
11121415
0.025
(0.635)
RAD TYP
0.300 BSC
(0.762 BSC)
0.045 – 0.068
(1.143 – 1.727)
FULL LEAD
OPTION
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
CORNER LEADS OPTION
(4 PLCS)
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
OBSOLETE PACKAGES
9
LT1039/LT1039-16
1039fd
PACKAGE DESCRIPTION
U
N Package
16-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
N16 1197
0.255 ± 0.015*
(6.477 ± 0.381)
0.770*
(19.558)
MAX
16
12345678
910
11
12
13
14
15
0.020
(0.508)
MIN
0.125
(3.175)
MIN
0.130 ± 0.005
(3.302 ± 0.127)
0.065
(1.651)
TYP
0.045 – 0.065
(1.143 – 1.651)
0.018 ± 0.003
(0.457 ± 0.076)
0.100 ± 0.010
(2.540 ± 0.254)
0.009 – 0.015
(0.229 – 0.381)
0.300 – 0.325
(7.620 – 8.255)
0.325 +0.035
–0.015
+0.889
–0.381
8.255
()
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
N Package
18-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
N18 1197
0.020
(0.508)
MIN
0.125
(3.175)
MIN
0.130 ± 0.005
(3.302 ± 0.127)
0.065
(1.651)
TYP
0.045 – 0.065
(1.143 – 1.651)
0.018 ± 0.003
(0.457 ± 0.076)
0.005
(0.127)
MIN
0.100 ± 0.010
(2.540 ± 0.254)
0.255 ± 0.015*
(6.477 ± 0.381)
0.900*
(22.860)
MAX
18
123456789
1011
121314
16 1517
0.009 – 0.015
(0.229 – 0.381)
0.300 – 0.325
(7.620 – 8.255)
0.325 +0.035
–0.015
+0.889
–0.381
8.255
()
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
10
LT1039/LT1039-16
1039fd
PACKAGE DESCRIPTION
U
SW Package
16-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
S16 (WIDE) 0396
NOTE 1
0.398 – 0.413*
(10.109 – 10.490)
16 15 14 13 12 11 10 9
12345678
0.394 – 0.419
(10.007 – 10.643)
0.037 – 0.045
(0.940 – 1.143)
0.004 – 0.012
(0.102 – 0.305)
0.093 – 0.104
(2.362 – 2.642)
0.050
(1.270)
TYP 0.014 – 0.019
(0.356 – 0.482)
TYP
0° – 8° TYP
NOTE 1
0.009 – 0.013
(0.229 – 0.330) 0.016 – 0.050
(0.406 – 1.270)
0.291 – 0.299**
(7.391 – 7.595)
× 45°
0.010 – 0.029
(0.254 – 0.737)
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
*
**
11
LT1039/LT1039-16
1039fd
PACKAGE DESCRIPTION
U
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 represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SW Package
18-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
S18 (WIDE) 0396
SEE NOTE
0.447 – 0.463*
(11.354 – 11.760)
15 14 13 12 11 10
16
9
12345678
0.394 – 0.419
(10.007 – 10.643)
1718
0.037 – 0.045
(0.940 – 1.143)
0.004 – 0.012
(0.102 – 0.305)
0.093 – 0.104
(2.362 – 2.642)
0.050
(1.270)
TYP 0.014 – 0.019
(0.356 – 0.482)
TYP
0° – 8° TYP
NOTE 1
0.009 – 0.013
(0.229 – 0.330) 0.016 – 0.050
(0.406 – 1.270)
0.291 – 0.299**
(7.391 – 7.595)
× 45°
0.010 – 0.029
(0.254 – 0.737)
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
*
**
12
LT1039/LT1039-16
1039fd
LT/TP 1102 1K REV D • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1991
TYPICAL APPLICATION
U
LT1080 (Driver/Receiver with Power Supply) Driving an LT1039
PART NUMBER DESCRIPTION COMMENTS
LTC®485 Low Power RS485 Transceiver Industry Standard
LT1039A/LT1039A-16 Triple RS232 Driver/Receivers with Shutdown ±15kV ESD Protection
LT1137A 5V 3-Driver/5-Receiver RS232 Transceiver ±15kV ESD Protection
LT1180A/LT1181A 5V 2-Driver/2-Receiver RS232 Transceivers 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
LT1780/LT1781 5V 2-Driver/2-Receiver RS232 Transceivers ±15kV ESD Protection, 0.1µF Capacitors
LT1785/LT1791 Half Duplex/Full Duplex RS485 Transceivers ±60V Protected with ±15kV ESD Protection
RELATED PARTS
LT1039
V
CC
18 17
V
–
GND
TTL IN
ON/OFF
RS232 OUT
TTL IN RS232 OUT
TTL IN RS232 OUT
RS232 IN
TTL OUT
9
1
7
16 1µF
3
1039 TA03
30k
V
+
RS232 IN
TTL OUT
30k
RS232 IN
10
TTLOUT
30k
LT1080
V
CC
18 17 5V
C2
–
GND
TTL IN
ON/OFF
SHUTDOWN
RS232 OUT
TTL IN RS232 OUT
RS232 IN
TTL OUT
6
5
5k
C2
+
V
–
1µF
1µF
V
+
RS232 IN
TTL OUT
5k
C1
–
4
2C1
+
1µF
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
