LT1181AIN#PBF [Linear]
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| 型号： | LT1181AIN#PBF |
| 厂家： | 
Linear |
| 描述： | 暂无描述 驱动器 电容器 |
| 文件： | 总12页 (文件大小：289K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1180A/LT1181A
Low Power 5V RS232
Dual Driver/Receiver with
0.1µF Capacitors
U
DESCRIPTIO
EATURE
S
F
ESD Protection over ±10kV
The LT®1180A/LT1181A are dual RS232 driver/receiver
pairs with integral charge pump to generate RS232 volt-
age levels from a single 5V supply. These circuits feature
rugged bipolar design to provide operating fault tolerance
and ESD protection unmatched by competing CMOS
designs. Using only 0.1µF external capacitors, these cir-
cuits consume only 40mW of power, and can operate to
120k baud even while driving heavy capacitive loads. New
ESDstructuresonthechipallowtheLT1180A/LT1181Ato
survive multiple ±10kV strikes, eliminating the need for
costly TransZorbs® on the RS232 line pins. The LT1180A/
LT1181A are fully compliant with EIA RS232 standards.
Driver outputs are protected from overload, and can be
shorted to ground or up to ±30V without damage. During
shutdown or power-off conditions, driver and receiver
outputs are in a high impedance state, allowing line
sharing.
■
■
■
■
■
■
■
■
■
Uses Small Capacitors: 0.1µF
120kBaud Operation for RL = 3k, CL = 2500pF
250kBaud Operation for RL = 3k, CL = 1000pF
Outputs Withstand ±30V Without Damage
CMOS Comparable Low Power: 40mW
Operates from a Single 5V Supply
Rugged Bipolar Design
Outputs Assume a High Impedance State When Off
or Powered Down
■
■
■
■
Meets All RS232 Specifications
Available With or Without Shutdown
Absolutely No Latch-up
Available in SO Package
O U
PPLICATI
S
A
■
■
■
■
■
Portable Computers
Battery-Powered Systems
Power Supply Generator
Terminals
The LT1181A is available in 16-pin DIP and SO packages.
The LT1180A is supplied in 18-pin DIP and SO packages
for applications which require shutdown.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TransZorb is a registered trademark of General Instruments, GSI
Modems
U
O
TYPICAL APPLICATI
2
17
Output Waveforms
5V INPUT
+
+
0.1µF
4
3
V
OUT
+
+
0.1µF
0.1µF
LT1180A
DRIVER
OUTPUT
5
7
–
RL = 3k
V
OUT
+
CL = 2500pF
0.1µF
6
12
15
RS232 OUTPUT
RECEIVER
LOGIC
INPUTS
OUTPUT
R
CL = 50pF
11
13
8
RS232 OUTPUT
RS232 INPUT
14
INPUT
5k
5k
LOGIC
OUTPUTS
10
18
9
RS232 INPUT
LT1180A • TA02
16
ON/OFF
LT1180A • TA01
1
LT1180A/LT1181A
W W W
U
(Note 1)
ABSOLUTE AXI U RATI GS
Short-Circuit Duration
Supply Voltage (VCC) ................................................ 6V
V+ ........................................................................ 13.2V
V– ...................................................................... –13.2V
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 ................................................. –0.3V to 12V
Output Voltage
LT1180AI/LT1181AI .......................... – 40°C to 85°C
LT1180AC/LT1181AC ............................. 0°C to 70°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
ORDER PART
ORDER PART
TOP VIEW
1
2
3
4
5
6
7
8
9
ON/OFF
18
17
16
15
14
13
12
11
10
NC
+
NUMBER
NUMBER
+
1
2
3
4
5
6
7
8
V
CC
16
15
14
13
12
11
10
9
C1
V
V
C1
CC
+
–
+
–
–
GND
+
–
+
–
–
GND
V
C1
C2
C2
V
TR1 OUT
REC1 IN
REC1 OUT
TR1 IN
C1
C2
C2
V
LT1181ACN
LT1181ACSW
LT1181AIN
LT1181AISW
LT1181AMJ
LT1180ACN
LT1180ACSW
LT1180AIN
LT1180AISW
LT1180AMJ
TR1 OUT
REC1 IN
REC1 OUT
TR1 IN
TR2 IN
TR2 OUT
REC2 IN
TR2 IN
TR2 OUT
REC2 IN
REC2 OUT
REC2 OUT
J PACKAGE
N PACKAGE
SW PACKAGE
J PACKAGE
N PACKAGE
SW PACKAGE
16-LEAD CERDIP 16-LEAD PDIP 16-LEAD PLASTIC SO (WIDE)
18-LEAD CERDIP 18-LEAD PDIP 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)
TJMAX = 125°C, θJA = 80°C/ W, θJC = 36°C/W (N)
T
JMAX = 125°C, θJA = 90°C/ W, θJC = 46°C/W (N)
T
JMAX = 125°C, θJA = 95°C/ W, θJC = 27°C/W (SW)
T
JMAX = 125°C, θJA = 90°C/ W, θJC = 26°C/W (SW)
(Note 2)
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Power Supply Generator
+
V Output
7.9
–7.0
9
V
V
–
V Output
Supply Current (V
)
CC
(Note 3), T = 25°C
13
16
mA
mA
A
●
●
Supply Current When OFF (V
)
CC
Shutdown (Note 4) LT1180A Only
1
10
µA
Supply Rise Time
Shutdown to Turn-On
C1 = C2 = C3 = C4 = 0.1µF
LT1180A Only
0.2
0.2
ms
ms
ON/OFF Pin Thresholds
Input Low Level (Device Shutdown)
Input High Level (Device Enabled)
●
●
0.8
1.2
1.6
V
V
2.4
80
ON/OFF Pin Current
Oscillator Frequency
0V ≤ V
≤ 5V
●
–15
µA
ON/OFF
130
kHz
2
LT1180A/LT1181A
ELECTRICAL CHARACTERISTICS (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Driver
Output Voltage Swing
Load = 3k to GND
Input Low Level (V
Positive
Negative
5.0
7.5
–6.3
V
V
●
–5.0
0.8
Logic Input Voltage Level
= High)
= Low)
●
●
1.4
1.4
V
V
OUT
Input High Level (V
2.0
OUT
Logic Input Current
0.8V ≤ V ≤ 2.0V
●
5
20
µA
mA
µA
IN
Output Short-Circuit Current
Output Leakage Current
Date Rate (Note 7)
V
= 0V
±9
17
10
OUT
Shutdown V
= ±30V (Note 4)
●
100
OUT
R = 3k, C = 2500pF
120
250
kBaud
kBaud
L
L
R = 3k, C = 1000pF
L
L
Slew Rate
R = 3k, C = 51pF
15
7
30
V/µs
V/µs
L
L
R = 3k, C = 2500pF
4
L
L
Propagation Delay
Output Transition t High-to-Low (Note 5)
0.6
0.5
1.3
1.3
µs
µs
HL
Output Transition t Low-to-High
LH
Receiver
Input Voltage Thresholds
Input Low Threshold (V
Input High Threshold (V
= High)
= Low)
C Grade
C Grade
●
●
0.8
0.2
1.3
1.7
V
V
OUT
2.4
OUT
Input Low
Input High
I, M Grade
I, M Grade
●
●
1.3
1.7
V
V
3.0
1.0
7
Hysteresis
●
0.1
3
0.4
5
V
kΩ
µA
Input Resistance
Output Leakage Current
Output Voltage
V = ±10V
IN
Shutdown (Note 4) 0 ≤ V
≤ V
●
1
10
0.4
OUT
CC
Output Low, I
Output High, I
= –1.6mA
= 160µA (V = 5V)
●
●
0.2
4.2
V
V
OUT
3.5
10
OUT
CC
Output Short-Circuit Current
Propagation Delay
Sinking Current, V
= V
–20
20
–10
mA
mA
OUT
CC
= 0V
Sourcing Current, V
OUT
Output Transition t High-to-Low (Note 6)
250
350
600
600
ns
ns
HL
Output Transition t Low-to-High
LH
The
● denotes specifications which apply over the operating temperature
Note 5: For driver delay measurements, R = 3k and C = 51pF. Trigger
L
L
range (0°C ≤ T ≤ 70°C for commercial grade, and –40°C ≤ T ≤ 85°C for
industrial grade.
points are set between the driver’s input logic threshold and the output
transition to the zero crossing (t = 1.4V to 0V and t = 1.4V to 0V).
A
A
HL
LH
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 6: For receiver delay measurements, C = 51pF. Trigger points are
set between the receiver’s input logic threshold and the output transition
L
to standard TTL/CMOS logic threshold (t = 1.3V to 2.4V and t = 1.7V
to 0.8V).
Note 2: Testing done at V = 5V and V
specified.
= 3V, unless otherwise
HL
LH
CC
ON/OFF
Note 7: Data rate operation guaranteed by slew rate, short-circuit current
and propagation delay tests.
Note 3: Supply current is measured as the average over several charge
pump cycles. C = C = C1 = C2 = 0.1µF. All outputs are open, with all
+
–
driver inputs tied high.
Note 4: Supply current measurements in SHUTDOWN are performed with
V
≤ 0.1V.
ON/OFF
3
LT1180A/LT1181A
TYPICAL PERFOR A CE CHARACTERISTICS
U W
Driver Maximum Output Voltage
vs Load Capacitance
Driver Minimum Output Voltage
vs Load Capacitance
Driver Output Voltage
10
8
8.0
7.5
–4.0
–4.5
R
= 3k
L
6
V
V
= 5.5V
CC
120kBAUD
V
= 5V
CC
4
7.0
6.5
–5.0
–5.5
= 4.5V
CC
20kBAUD
60kBAUD
120kBAUD
2
OUTPUT HIGH
60kBAUD
20kBAUD
0
OUTPUT LOW
–2
–4
–6
–8
–10
V
V
= 4.5V
= 5V
CC
V
CC
6.0
5.5
5.0
–6.0
–6.5
–7.0
CC
= 5.5V
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
–55
0
25
50
75 100 125
–25
LOAD CAPACITANCE (nF)
LOAD CAPACITANCE (nF)
TEMPERATURE (°C)
LT1180A • TPC01
LT1180A • TPC02
LT1180A • TPC03
Receiver Input Thresholds
Supply Current vs Data Rate
ON/OFF Thresholds
3.00
2.75
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
50
40
30
20
3.0
2.5
2.0
1.5
2 DRIVERS ACTIVE
R
= 3k
= 2500pF
L
L
C
INPUT HIGH
INPUT LOW
ON THRESHOLD
1.0
0.5
0
OFF THRESHOLD
10
0
–55
0
25
50
75 100 125
0
50
75
100
125
150
–25
25
50
TEMPERATURE (°C)
100 125
–55 –25
0
25
75
TEMPERATURE (°C)
DATA RATE (kBAUD)
LT1180A • TPC04
LT1180A • TPC05
LT1180A • TPC06
Driver Leakage in Shutdown
Supply Current
Driver Short-Circuit Current
25
20
15
10
5
30
25
20
15
100
10
1
2 DRIVERS LOADED R = 3k
L
+
I
SC
1 DRIVER LOADED R = 3k
L
–
I
V
= 30V
SC
OUT
10
5
V
= –30V
OUT
NO LOAD
0
0
0.1
–55
0
25
50
75 100 125
–25
50
TEMPERATURE (°C)
100 125
–55 –25
0
25
75
–55
0
25
50
75 100 125
–25
TEMPERATURE (°C)
TEMPERATURE (°C)
LT1180A • TPC07
LT1180A • TPC09
LT1180A • TPC08
4
LT1180A/LT1181A
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Receiver Short-Circuit Current
Slew Rate vs Load Capacitance
50
40
30
20
10
0
16
14
12
10
8
–
RX I
+
SC
RX I
SC
+SLEW
6
–SLEW
4
2
0
–55
0
25
50
75 100 125
–25
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
LOAD CAPACITANCE (nF)
LT1180A • TPC11
TEMPERATURE (°C)
LT1180A • TPC10
Shutdown to Driver Outputs
Driver Output Waveforms
10V
DRIVER 1
OUTPUT
5V
GND
GND
DRIVER OUTPUT
RL = 3k
C
L = 2500pF
DRIVER 2
OUTPUT
–5V
DRIVER OUTPUT
L = 3k
–10V
R
ON/OFF PIN
INPUT
LT1180A • TPC13
LT1180A • TPC12
U
U
U
PI FU CTIO S
V+: Positive Supply Output (RS232 Drivers). V+ ≈ 2VCC
–
VCC: 5V Input Supply Pin. This pin should be decoupled
with a 0.1µF ceramic capacitor close to the package pin.
Insufficient supply bypassing can result in low output
drive levels and erratic charge pump operation.
1.5V. This pin requires an external charge storage capaci-
tor C ≥ 0.1µF, tied to ground or VCC. Larger value capaci-
tors may be used to reduce supply ripple. With multiple
transceivers, the V+ and V– pins may be paralleled into
common capacitors.
GND: Ground Pin.
ON/OFF: A TTL/CMOS Compatible Operating Mode Con-
trol. A logic low puts the LT1180A in shutdown mode.
Supply current drops to zero and both driver and receiver
outputs assume a high impedance state. A logic high fully
enables the device.
V–: Negative Supply Output (RS232 Drivers). V– ≈ –(2VCC
– 2.5V). This pin requires an external charge storage
capacitor C ≥ 0.1µF. Larger value capacitors may be used
to reduce supply ripple. With multiple transceivers, the V+
and V– pins may be paralleled into common capacitors.
5
LT1180A/LT1181A
U
U
U
PI FU CTIO S
REC1 IN, REC2 IN: Receiver Inputs. These pins accept
RS232levelsignals(±30V)intoaprotected5kterminating
resistor. The receiver inputs are protected against ESD to
±10kV for human body model discharges. Each receiver
provides 0.4V of hysteresis for noise immunity. Open
receiver inputs assume a logic low state.
TR1IN, TR2IN:RS232DriverInputPins. Theseinputsare
TTL/CMOS compatible. Inputs should not be allowed to
float. Tie unused inputs to VCC.
TR1 OUT, TR2 OUT: Driver Outputs at RS232 Voltage
Levels. Driver output swing meets RS232 levels for loads
up to 3k. Slew rates are controlled for lightly loaded lines.
Output current capability is sufficient for load conditions
up to 2500pF. Outputs are in a high impedance state when
in shutdown mode, VCC = 0V, or when the driver disable
pin is active. Outputs are fully short-circuit protected from
V– + 30V to V+ – 30V. Applying higher voltages will not
damage the device if the overdrive is moderately current
limited. Short circuits on one output can load the power
supply generator and may disrupt the signal levels of the
other outputs. The driver outputs are protected against
ESD to ±10kV for human body model discharges.
REC1 OUT, REC2 OUT: Receiver outputs with TTL/CMOS
Voltage Levels. Outputs are in a high impedance state
wheninshutdownmodetoallowdatalinesharing.Outputs
are fully short-circuit protected to ground or VCC with the
power on, off or in the shutdown mode.
C1+, C1–, C2+, C2–: Commutating Capacitor Inputs.
These pins require two external capacitors C ≥ 0.1µF: one
from C1+ to C1– and another from C2+ to C2–. C1 should
be deleted if a separate 12V supply is available and con-
nected to pin C1+. Similarly, C2 should be deleted if a
separate –12V supply is connected to pin V–.
U
ESD PROTECTIO
ESD Test Circuit
The RS232 line inputs of the LT1180A/LT1181A have on-
chip protection from ESD transients up to ±10kV. The
protection structures act to divert the static discharge
safelytosystemground. InorderfortheESDprotectionto
function effectively, the power supply and ground pins of
the circuit must be connected to ground through low
impedances.Thepowersupplydecouplingcapacitorsand
charge pump storage capacitors provide this low imped-
ance in normal application of the circuit. The only con-
straint is that low ESR capacitors must be used for
bypassing and charge storage. ESD testing must be done
with pins VCC, VL, V+, V–, and GND shorted to ground or
connected with low ESR capacitors.
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
NC
ON/OFF
LT1180A
+
5V V
CC
C1
+
+
+
0.1µF
+
+
0.1µF
+
0.1µF
0.1µF
V
GND
DR1 OUT
–
+
C1
RS232
LINE PINS
PROTECTED
TO ±10kV
RX1 IN
RX1 OUT
DR1 IN
C2
–
C2
0.1µF
–
V
DR2 OUT
RX2 IN
DR2 IN
RS232
LINE PINS
PROTECTED
TO ±10kV
RX2 OUT 10
LT1180A • ESD TC
6
LT1180A/LT1181A
U
O
TYPICAL APPLICATI
Supporting an LT1039 (Triple Driver/Receiver)
SHUTDOWN
5V
18
17
18
17
ON/OFF
V
V
ON/OFF
CC
CC
LT1039
LT1180A
15
13
4
6
TTL INPUT
TTL INPUT
RS232 OUTPUT
RS232 OUTPUT
11
12
13
8
TTL INPUT
TTL INPUT
RS232 OUTPUT
RS232 OUTPUT
15
14
11
16
8
3
TTL INPUT
RS232 OUTPUT
RS232 INPUT
RS232 INPUT
RS232 INPUT
TTL OUTPUT
TTL OUTPUT
5k
5k
30k
30k
30k
9
10
2
14
5
7
TTL OUTPUT
TTL OUTPUT
TTL OUTPUT
RS232 INPUT
RS232 INPUT
+
C1
+
12
1µF
4
5
–
+
C1
C2
3
7
1
9
+
–
+
–
V
V
V
+
1µF
6
–
V
C2
+
GND
16
GND
10
1µF
1µF
+
LT1180A • TA04
7
LT1180A/LT1181A
U
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
J Package
16-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
0.840
(21.336)
0.005
(0.127)
MIN
MAX
CORNER LEADS OPTION
(4 PLCS)
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
0.300 BSC
(5.080)
MAX
(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
(24.384)
MAX
CORNER LEADS OPTION
(4 PLCS)
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
J18 1197
(0.360 – 0.660)
8
LT1180A/LT1181A
U
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
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
0.100 ± 0.010
(2.540 ± 0.254)
–0.015
0.125
(3.175)
MIN
0.018 ± 0.003
+0.889
8.255
(0.457 ± 0.076)
(
)
–0.381
N18 1197
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
9
LT1180A/LT1181A
U
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
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
11
9
16
13
0.394 – 0.419
(10.007 – 10.643)
NOTE 1
2
3
5
7
8
1
4
6
0.291 – 0.299**
(7.391 – 7.595)
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
LT1180A/LT1181A
U
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
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
LT1180A/LT1181A
U
O
TYPICAL APPLICATI
Operation Using 5V and 12V Power Supplies
2
4
17
3
5V INPUT
12V INPUT
LT1180A
5
6
7
–12V
OUT
+
0.1µF
0.1µF
+
12
15
RS232 OUTPUT
LOGIC INPUTS
11
13
8
RS232 OUTPUT
RS232 INPUT
14
5k
5k
LOGIC OUTPUTS
ON/OFF
10
18
9
RS232 INPUT
16
LT1180A • TA03
RELATED PARTS
PART NUMBER
LT1280A/LT1281A
LT1381
DESCRIPTION
COMMENTS
5V 2-Driver/2-Receiver RS232 Transceivers
5V 2-Driver/2-Receiver RS232 Transceiver
5V 2-Driver/2-Receiver RS232 Transceivers
Pin Compatible with LT1180A/LT1181A, I = 10mA Max
CC
Narrow 16-Pin SO Package
LT1780/LT1781
IEC 1000-4-2 Level 4 Compliance
11801afa LT/TP 1098 REV A 2K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1994
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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