LT1081IN#PBF [Linear]
LT1081 - Advanced Low Power 5V RS232 Dual Driver/Receiver; Package: PDIP; Pins: 16; Temperature Range: -40°C to 85°C;
| 型号： | LT1081IN#PBF |
| 厂家： | 
Linear |
| 描述： | LT1081 - Advanced Low Power 5V RS232 Dual Driver/Receiver; Package: PDIP; Pins: 16; Temperature Range: -40°C to 85°C 驱动器 |
| 文件： | 总12页 (文件大小：216K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1080/LT1081
Advanced Low Power
5V RS232 Dual Driver/Receiver
U
DESCRIPTIO
FEATURES
The LT®1080/LT1081 are the only dual RS232 driver/
receiver with charge pump to guarantee absolutely no
latchup. These interface optimized devices provide a real-
istic balance between CMOS levels of power dissipation
and real world requirements for ruggedness. The driver
outputs are fully protected against overload and can be
shorted to ±30V. Unlike CMOS, the advanced architecture
of the LT1080/LT1081 does not load the signal line when
“shut down” or when power is off. Both the receiver and
RS232 outputs are put into a high impedance state. An
advanced output stage allows driving higher capacitive
loads at higher speeds with exceptional ruggedness
against ESD.
■
Superior to CMOS
– Improved Speed: Operates over 120kBaud
– Improved Protection: Outputs Can Be Forced
to ±30V without Damage
– Three-State Outputs Are High
Impedance When Off
– Only Needs 1µF Capacitors
Absolutely No Latchup
■
■
CMOS Comparable Low Power: 60mW
■
Can Power Additional RS232 Drivers: 10mA
■
Supply Current in Shutdown: 1µA
■
Available in SO Package
■
Available with or without Shutdown
For applications requiring up to five drivers and five
receiverswithchargepumpinonepackageseetheLT1130A
Series data sheet. A version of the LT1080/LT1081, the
LT1180A and LT1181A that use only 0.1µF capacitors, is
also available. All of Linear Technology’s RS232 ICs are
available in standard surface mount packages.
U
APPLICATIO S
■
Portable Computers
■
Battery-Powered RS232 Systems
■
Power Supply Generator
■
Terminals
Modems
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
U
TYPICAL APPLICATIO
2
17
5V INPUT
1µF
4
3
Supply Generator Outputs
9V OUTPUT
10
1µF
1µF
+
LT1080
V
OUTPUT
8
6
–
5
7
R
TO V
L
–9V OUTPUT
R TO GND
L
1µF
6
4
12
15
2
RS232 OUTPUT
LOGIC
0
V
= 5V
CC
INPUTS
11
13
8
–2
–4
–6
–8
–10
RS232 OUTPUT
RS232 INPUT
14
R
L
TO GND
+
R
TO V
L
5k
5k
LOGIC
OUTPUTS
–
10
18
9
V
OUTPUT
10 12 14 16 18 20
OUTPUT CURRENT (mA)
RS232 INPUT
0
2
4
6
8
16
ON/OFF
1080/81 TA01a
1080/81 • TA01
1
LT1080/LT1081
W W W
U
(Note 1)
ABSOLUTE AXI U RATI GS
Short-Circuit Duration
Supply Voltage (VCC) ................................................. 6V
V+........................................................................................... 12V
V–....................................................................................... –12V
Input Voltage
V+...................................................................................... 30 sec
V–...................................................................................... 30 sec
Driver Output............................................... Indefinite
Receiver Output........................................... Indefinite
Operating Temperature Range
Driver ........................................................... V– to V+
Receiver ................................................. –30V to 30V
ON/OFF Pin .............................................. GND to 12V
Output Voltage
LT1080C/LT1081C ................................. 0°C to 70°C
LT1080I/LT1081I................................ –40°C to 85°C
LT1080M/LT1081M.......................... –55°C to 125°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
Driver ................................. (V– + 30V) to (V+ – 30V)
Receiver .................................. –0.3V to (VCC + 0.3V)
W
U
/O
PACKAGE RDER I FOR ATIO
TOP VIEW
TOP VIEW
ORDER PART
NUMBER
ORDER PART
+
1
2
3
4
5
6
7
8
9
ON/OFF
18
17
16
15
14
13
12
11
10
NC
+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
NUMBER
C1
V
+
–
+
–
–
V
CC
C1
GND
LT1080CJ
LT1080CN
LT1080CSW
LT1080IN
LT1080ISW
LT1080MJ
LT1081CJ
LT1081CN
LT1081CSW
LT1081IN
LT1081ISW
LT1081MJ
+
–
+
–
–
GND
V
C1
C2
C2
V
TR1 OUT
REC1 IN
REC1 OUT
TR1 IN
C1
C2
C2
V
TR1 OUT
REC1 IN
REC1 OUT
TR1 IN
LT1081
LT1080
TR2 IN
TR2 OUT
REC2 IN
TR2 IN
TR2 OUT
REC2 IN
REC2 OUT
REC2 OUT
J PACKAGE
16-LEAD CERDIP
N PACKAGE
16-LEAD PDIP
J PACKAGE
N PACKAGE
SW PACKAGE
16-LEAD PLASTIC SO WIDE
18-LEAD CERDIP
18-LEAD PDIP
SW PACKAGE
18-LEAD PLASTIC SO WIDE
TJMAX = 150°C, θJA = 100°C/W, θJC = 40°C/W (J)
TJMAX = 150°C, θJA = 100°C/W, θJC = 40°C/W (J)
T
JMAX = 150°C, θJA = 120°C/W, θJC = 50°C/W (N)
TJMAX = 150°C, θJA = 120°C/W, θJC = 50°C/W (N)
TJMAX = 150°C, θJA = 90°C/W, θJC = 26°C/W (SW)
TJMAX = 150°C, θJA = 95°C/W, θJC = 27°C/W (SW)
2
LT1080/LT1081
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
ELECTRICAL CHARACTERISTICS
PARAMETER
Driver
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage Swing
Load = 3k to GND Both Outputs
Positive
Negative
●
●
5
–5
7.3
–6.5
V
V
Logic Input Voltage Level
Logic Input Current
Input Low Level (V
Input High Level (V
= High)
= Low)
●
●
1.4
1.4
0.8
V
V
OUT
2
OUT
V
V
≥ 2V
≤ 0.8V
●
●
5
5
20
20
µA
µA
IN
IN
Output Short-Circuit Current
Sourcing Current, V
= 0V
= 0V
9
–9
12
–12
mA
mA
OUT
Sinking Current, V
OUT
Output Leakage Current
Data Rate (Note 6)
SHUTDOWN (Note 3), V
= ±30V
●
10
100
30
µA
OUT
R = 3k, C = 2500pF
120
250
kBd
kBd
L
L
R = 3k, C = 1000pF
L
L
Slew Rate
R = 3k, C = 51pF
4
15
V/µs
L
L
Receiver
Input Voltage Thresholds
Input Low Threshold
Input High Threshold
Commercial
Industrial and Military
●
●
0.8
0.2
1.3
1.3
V
V
Commercial
Industrial and Military
●
●
1.7
1.7
2.4
3.0
V
V
Hysteresis
●
0.1
3
0.4
5
1
7
V
Input Resistance
Output Voltage
V
= ±10V
kΩ
IN
Output Low, I
Output High, I
= –1.6mA
= 160µA (V = 5V)
●
●
0.2
4.8
0.4
V
V
OUT
3.5
OUT
CC
Output Short-Circuit Current
Sinking Current, V
Sourcing Current, V
= V
–10
0.6
–20
1
mA
mA
OUT
CC
= 0V
OUT
Output Leakage Current
SHUTDOWN (Note 3), 0V ≤ V
≤ V
●
1
10
µA
OUT
CC
Power Supply Generator (Note 4)
+
V Output Voltage
I
I
I
= 0mA
= 10mA
= 15mA
8.0
7.0
6.5
9.0
8.0
7.5
V
V
V
OUT
OUT
OUT
–
V Output Voltage
I
I
I
= 0mA
= –10mA
= –15mA
–7.5
–5.5
–5.0
–8.5
–6.5
–6.0
V
V
V
OUT
OUT
OUT
Supply Current
●
●
●
12
1
22
100
80
mA
µA
Supply Leakage Current (V
ON/OFF Pin Current
Supply Rise Time
)
CC
SHUTDOWN (Note 3), LT1080 Only
0V ≤ V ≤ 5V, LT1080 Only
–15
µA
ON/OFF
(Note 5), LT1080 Only
1
ms
+
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 4: Unless otherwise specified, V = 5V, external loading of V and
CC
–
V equals zero and the driver outputs are low (inputs high).
+
Note 2: These parameters apply for 4.5V ≤ V ≤ 5.5V and V
= 3V,
Note 5: Time from either SHUTDOWN high or power on until V ≥ 6V and
CC
ON/OFF
–
unless otherwise specified.
V ≤ –6V. All external capacitors are 1µF.
Note 3: V
= 0.4V for –55°C ≤ T ≤ 50°C, and V = 0.2V for
ON/OFF
Note 6: Data rate operation guaranteed by slew rate, short-circuit current
and propagation delay tests.
ON/OFF
A
50°C ≤ T ≤ 125°C. (LT1080 only)
A
3
LT1080/LT1081
U
U
U
PI FU CTIO S (Pin numbers refer to LT1080)
C1+; C1–; C2+; C2– (Pins 2, 4, 5, 6): Requires an external
capacitor (≥1µF) from C1+ to C1– and another from C2+
to C2–. Pin 2 can be used for connecting a second positive
supply.Whenaseparatepositivesupplyisused,C1canbe
deleted.
voltages will not damage the device if moderately current
limited. Shorting one output will affect output from the
other.
REC2 IN; REC1 IN (Pins 9, 14): Receiver Inputs. Accepts
RS232 voltage levels (±30V) and has 0.4V of hysteresis to
provide noise immunity. Input impedance is nominally
5kΩ.
V+ (Pin 3): Positive Supply for RS232 Drivers.
V+ ≈ 2VCC – 1.5V. Requires an exterenal capacitor (≥1µF)
for charge storage. May be loaded (up to 15mA) for
external system use. Loading does reduce V+ voltage (see
graphs). Capacitor may be tied to ground or +5V input
supply.Withmultipletransceivers,theV+ andV– pinsmay
be paralleled into common capacitors.
REC2 OUT; REC1 OUT (Pins 10, 13): 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.
V– (Pin 7): Negative Supply for RS232 Drivers.
V– ≈ –(2VCC – 2.5V). Requires an external capacitor
(≥1µF) for charge stroage. May be loaded (up to –15mA)
for external system use. Loading does reduce V– voltage
(see graphs). With multiple transceivers, the V+ and V–
pins may be paralleled into common capacitors.
TR2 IN; TR1 IN (Pins 11, 12): RS232 Driver Input Pins.
Inputs are TTL/CMOS compatible. Inputs should not be
allowed to float. Tie unused inputs to VCC.
GND (Pin 16): Ground Pin.
VCC (Pin 17): Input Supply Pin. Supply current drops to
TR2 OUT; TR1 OUT (Pins 8, 15): Driver Outputs with
RS232 Voltage Levels. Outputs are in a high impedance
state when in the SHUTDOWN mode or when power is off
(VCC = 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
zero in the SHUTDOWN mode.
ON/OFF (Pin 18): Contols the operation mode of the
LT1080 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. A logic high fully
enables the device.
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Generation from VCC
or Shutdown
Driver Output Voltage
Supply Generator Outputs
10
8
10
8
10
8
+
+
V
= 5.5V
= 4.5V
OUTPUT HIGH
V
–
OUTPUT VOLTAGE
LOADED TO GROUND
CC
CC
V
SUPPLY
LOADED TO V
6
6
6
V
CC
= 5V
V
C1 TO C4 = 1µF
V
= 5V
4
CC
CC
4
4
+
–
R
= 4.7k; V TO V
L
2
2
2
0
R
= 3k
0
V
CC
= 5V
0
L
–2
–4
–6
–8
–10
–2
–4
–6
–8
–10
–2
–4
–6
–8
–10
V
= 5V
V
V
= 4.5V
= 5.5V
CC
LOADED TO GROUND
+
LOADED TO V
–
–
OUTPUT LOW
50 75 100 125
CC
V
SUPPLY
V
OUTPUT VOLTAGE
10 12 14 16 18 20
OUTPUT CURRENT (mA)
–55 –25
0
25
0
2
4
6
8
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
TIME (ms)
TEMPERATURE (°C)
1080/81 G01
1080/81 G02
1080/81 G03
4
LT1080/LT1081
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Receiver Output
Short-Circuit Current
Receiver Input Thresholds
ON/OFF Pin Current vs Voltage
100
10
1
3.00
2.75
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
40
35
30
25
20
15
10
5
OUTPUT SINKING
INPUT HIGH
INPUT LOW
OUTPUT SOURCING
0
–5
–10
0.1
–55 –25
0
25
50
75 100 125
–55 –25
0
25
50
75 100 125
0
1
2
3
4
5
TEMPERATURE (°C)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
1080/81 G05
1080/81 G04
1080/81 G06
Driver Output Leakage in
Shutdown
ON/OFF Pin Thresholds
Supply Current in Shutdown
100
10
1
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1000
100
10
V
CC
= 5V
MINIMUM ON VOLTAGE
V
= 30V
V
OUT
MAXIMUM OFF VOLTAGE
= –30V
OUT
0.1
–55 –25
1
–55 –25
0
25
50
75 100 125
0
25
50
75 100 125
–55 –25
0
25
50
75 100 125
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
1080/81 G07
1080/81 G09
1080/81 G08
Output Waveforms
Shutdown to Driver Output
Shutdown to Receiver Output
5V
0V
–5V
10V
5V
0V
DRIVER
OUTPUT
HIGH
6V
RECEIVER 4V
DRIVER
OUTPUT
2V
0V
OUTPUT
RECEIVER 0V
OUTPUT –5V
LOW –10
RECEIVER 5V
OUTPUT 0V
ON/OFF 5V
INPUT 0V
5V
INPUT
0V
ON/OFF 5V
INPUT 0V
0
2µs
4µs
6µs
8µs
1080/81 G10.tiff
0
1ms
2ms
3ms
4ms
1080/81 G11.tiff
0
1ms
2ms
3ms
4ms
1080/81 G11.tiff
V
CC = 5V
VCC = 5V
V
CC = 5V
RL = 3k
RL = 3k
5
LT1080/LT1081
U
W U U
APPLICATIO S I FOR ATIO
The driver output stage of the LT1080 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. Some
drivers have diodes connected between the outputs and
the supplies, so externally applied voltages can cause
excessive supply voltage to develop.
Placing the LT1080 in the SHUTDOWN mode (Pin 18 low)
puts both the driver and receiver outputs in a high imped-
ance state. This allows data line sharing and transceiver
applications.
The SHUTDOWN mode also drops input supply current
(VCC; Pin 17) to zero for power-conscious systems.
LT1080/LT1081 Driver
Transceiver
LT1080 #1
DRIVER
LOGIC
TRANSMIT/RECEIVE
LINE
RS232
TRANSMIT/RECEIVE
LINE
30V
–30V
OUTPUT CAN
BE FORCED
EXTERNALLY
1080/81 F01
LT1080 #2
RECEIVER
Older RS232 Drivers and CMOS Drivers
+
V
LOGIC
INVERTER
WITH SOME DRIVERS,
EXTERNALLY APPLIED
VOLTAGE CAN FORCE
THE SUPPLIES
ON/OFF
(TRANSMIT/
RECEIVE)
INPUT
1080/81 F03
–
1080/81 F02
V
Sharing a Receiver Line
Sharing a Transmitter Line
LT1080 #1
RECEIVER
LT1080 #1
DRIVER
RS232
INPUT A
LOGIC
INPUT A
LT1080 #2
RECEIVER
LT1080 #2
DRIVER
RS232
TRANSMISSION
LINE
RS232
INPUT B
LOGIC
OUTPUT
LOGIC
INPUT B
LOGIC
INVERTER
LOGIC
INVERTER
ON/OFF
(CHANNEL
SELECT)
INPUT
ON/OFF
(CHANNEL
SELECT)
INPUT
1080/81 F04
1080/81 F05
6
LT1080/LT1081
U
W U U
APPLICATIO S I FOR ATIO
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.
The generated driver supplies (V+ and V–) may be used to
powerexternalcircuitrysuchasotherRS232driversorop
amps. They should be loaded with care, since excessive
loading can cause the generated supply voltages to drop,
causing the RS232 driver output voltages to fall below
RS232 requirements. See the graph “Supply Generator
Outputs” for a comparison of generated supply voltage
versus supply current.
V
CC
LT1080
RECEIVER
CMOS
51k*
LOGIC
RS232
INPUT
LOGIC
OUTPUT
EXTERNAL OP AMP
+
3
1µF
+
LT1080
V
ON/OFF
INPUT
+
–
V
V
DRIVER
+
–
* FORCES LOGIC INPUT STATE WHEN V
IS LOW
ON/OFF
1080/81 F06
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.
16
–
GND
V
7
1µF
RECEIVER
5k
1k*
RS232
INPUT
1080/81 F08
LOGIC
OUTPUT
30V
30V
* A PTC THERMISTOR WILL ALLOW
CONTINUOUS OVERLOAD OF GREATER THAN ±100V
1080/81 F067
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TYPICAL APPLICATIO
Operating with 5V and 12V
2
17
12V INPUT*
5V INPUT
4
3
LT1080
5
7
–12V OUTPUT
1µF
1µF
6
12
15
RS232 OUTPUT
LOGIC
INPUTS
11
13
8
RS232 OUTPUT
RS232 INPUT
14
5k
5k
LOGIC
OUTPUTS
10
18
9
RS232 INPUT
16
ON/OFF
1080/81 • TA03
* PIN 1 USED ON LT1081.
7
LT1080/LT1081
U
PACKAGE DESCRIPTIO
Dimensions in inches (millimeters) unless otherwise noted.
J Package
16-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
0.840
(21.336)
MAX
CORNER LEADS OPTION
(4 PLCS)
0.005
(0.127)
MIN
16
10
15
14
12
11
9
8
13
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
0.220 – 0.310
(5.588 – 7.874)
0.025
(0.635)
RAD TYP
0.045 – 0.068
(1.143 – 1.727)
FULL LEAD
OPTION
2
3
5
1
4
6
7
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°
0.045 – 0.068
(1.143 – 1.727)
0.100 ± 0.010
(2.540 ± 0.254)
0.125
(3.175)
MIN
0.014 – 0.026
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
(0.360 – 0.660)
J16 1197
J Package
18-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
0.960
CORNER LEADS OPTION
(4 PLCS)
(24.384)
MAX
0.005
(0.127)
MIN
17
16
18
15
14
11
13
12
10
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
0.220 – 0.310
(5.590 – 7.870)
0.025
(0.635)
RAD TYP
0.045 – 0.068
(1.143 – 1.727)
FULL LEAD
OPTION
3
1
2
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°
0.045 – 0.068
(1.143 – 1.727)
0.100 ± 0.010
(2.540 ± 0.254)
0.125
(3.175)
MIN
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
0.014 – 0.026
(0.360 – 0.660)
J18 1197
8
LT1080/LT1081
U
PACKAGE DESCRIPTIO
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
14
12
10
9
8
15
13
11
16
0.255 ± 0.015*
(6.477 ± 0.381)
2
1
3
4
6
5
7
0.300 – 0.325
0.130 ± 0.005
0.045 – 0.065
(7.620 – 8.255)
(3.302 ± 0.127)
(1.143 – 1.651)
0.020
(0.508)
MIN
0.065
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
+0.035
–0.015
0.325
0.125
(3.175)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
0.100 ± 0.010
(2.540 ± 0.254)
+0.889
8.255
(
)
–0.381
*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
0.255 ± 0.015*
(6.477 ± 0.381)
1
2
3
5
6
9
4
7
8
0.300 – 0.325
(7.620 – 8.255)
0.130 ± 0.005
(3.302 ± 0.127)
0.045 – 0.065
(1.143 – 1.651)
0.020
(0.508)
MIN
0.065
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
+0.035
0.325
0.005
(0.127)
MIN
–0.015
0.125
(3.175)
MIN
0.018 ± 0.003
+0.889
8.255
(0.457 ± 0.076)
(
)
–0.381
0.100 ± 0.010
(2.540 ± 0.254)
N18 1197
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
9
LT1080/LT1081
U
PACKAGE DESCRIPTIO
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)
15 14 12
10
9
16
13
11
0.394 – 0.419
(10.007 – 10.643)
NOTE 1
0.291 – 0.299**
(7.391 – 7.595)
2
3
5
7
8
1
4
6
0.037 – 0.045
(0.940 – 1.143)
0.093 – 0.104
(2.362 – 2.642)
0.010 – 0.029
(0.254 – 0.737)
× 45°
0° – 8° TYP
0.050
(1.270)
TYP
0.004 – 0.012
(0.102 – 0.305)
0.009 – 0.013
NOTE 1
(0.229 – 0.330)
0.014 – 0.019
0.016 – 0.050
(0.356 – 0.482)
TYP
(0.406 – 1.270)
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) 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
10
LT1080/LT1081
U
PACKAGE DESCRIPTIO
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)
14 13
11
15
12
10
18 17 16
0.394 – 0.419
(10.007 – 10.643)
SEE NOTE
0.291 – 0.299**
(7.391 – 7.595)
2
3
5
7
8
9
1
4
6
0.037 – 0.045
(0.940 – 1.143)
0.093 – 0.104
(2.362 – 2.642)
0.010 – 0.029
(0.254 – 0.737)
× 45°
0° – 8° TYP
0.050
(1.270)
TYP
0.004 – 0.012
0.009 – 0.013
(0.102 – 0.305)
NOTE 1
(0.229 – 0.330)
0.014 – 0.019
0.016 – 0.050
(0.356 – 0.482)
TYP
(0.406 – 1.270)
NOTE:
S18 (WIDE) 0396
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
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-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
11
LT1080/LT1081
U
TYPICAL APPLICATIO
Supporting an LT1039 (Triple Driver/Receiver)
SHUTDOWN
5V
18
17
18
17
ON/OFF
V
V
ON/OFF
LT1039
CC
CC
LT1080
TTL INPUT
TTL INPUT
TTL INPUT
TTL INPUT
RS232 OUTPUT
RS232 OUTPUT
RS232 OUTPUT
RS232 OUTPUT
RS232 OUTPUT
RS232 INPUT
TTL INPUT
RS232 INPUT
RS232 INPUT
TTL OUTPUT
TTL OUTPUT
5k
30k
30k
30k
RS232 INPUT
RS232 INPUT
TTL OUTPUT
2
TTL OUTPUT
TTL OUTPUT
5k
+
*C1
1µF
C1
4
5
–
+
C1
C2
C2
3
7
1
9
+
+
–
V
V
V
V
1µF
6
–
–
GND
16
GND
10
1µF
1µF
1080/81 • TA02
*IN APPLICATIONS WHERE A SEPARATE SECOND POSITIVE SUPPLY IS AVAILABLE
(SUCH AS 5V AND 12V), THE 12V SUPPLY MAY BE CONNECTED TO PIN 2 AND
C1 DELETED. THE POWER SUPPLY CIRCUITRY WILL THEN INVERT THE 12V SUPPLY.
THE 5V SUPPLY IS STILL NEEDED TO POWER THE BIASING CIRCUITRY AND RECEIVERS.
RELATED PARTS
PART NUMBER
LT1180A/LT1181A
LT1780/LT1781
LT1381
DESCRIPTION
COMMENTS
5V Low Power 2DR/2TX RS232 Transceiver
5V Low Power 2DR/2TX RS232 Transceiver
5V Low Power 2DR/2TX RS232 Transceiver
5V RS232 Transceivers
0.1µF Capacitors, 10kV ESD
15kV ESD
16-Pin Narrow SO Package
Up to 5DR/5RX
LT1130A/LT1140A
LTC1383
5V Low Power 2DR/2RX RS232 Transceiver
3.3V Low Power EIA/TIA562 Transceiver
Low Supply Current I = 220µA
CC
LTC1386
Low Supply Current I = 200µA
CC
10801fd LT/TP 0400 2K REV D • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1991
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
(408)432-1900 FAX:(408)434-0507 www.linear-tech.com
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