1
LT1130A/LT1140A Series
Advanced Low Power
5V RS232 Drivers/Receivers
with Small Capacitors
■
ESD Protection over ±10kV
(±15kV IEC-1000-4-2 for LT1133A, LT1137A
and LT1141A)
■
Uses Small Capacitors: 0.1µF, 0.2µF
■
1µA Supply Current in SHUTDOWN
■
120kBaud Operation for R
L
= 3k, C
L
= 2500pF
■
250kBaud Operation for R
L
= 3k, C
L
= 1000pF
■
CMOS Comparable Low Power
■
Easy PC Layout: Flowthrough Architecture
■
Rugged Bipolar Design: Absolutely No Latchup
■
Outputs Assume a High Impedance State When Off
or Powered Down
■
Improved Protection: RS232 I/O Lines Can Be Forced
to ±30V Without Damage
■
Output Overvoltage Does Not Force Current Back
into Supplies
■
Available in SO and SSOP Packages
The LT
®
1130A/LT1140A series of RS232 drivers/receiv-
ers features special bipolar construction techniques which
protect the drivers and receivers beyond the fault condi-
tions stipulated for RS232. Driver outputs and receiver
inputs can be shorted to ±30V without damaging the
device or the power supply generator. In addition, the
RS232 I/O pins are resilient to multiple ±10kV ESD strikes.
An advanced driver output stage operates up to 250kbaud
while driving heavy capacitive loads. Supply current is
typically 12mA, competitive with CMOS devices.
Several members of the series include flexible operating
mode controls. The DRIVER DISABLE pin disables the
drivers and the charge pump, the ON/OFF pin shuts down
all circuitry. While shut down, the drivers and receivers
assume high impedance output states.
, LTC and LT are registered trademarks of Linear Technology Corporation.
LT1136A 4-Driver/5-Receiver RS232 Transceiver w/Shutdown
LT1137A 3-Driver/5-Receiver RS232 Transceiver w/Shutdown
LT1138A 5-Driver/3-Receiver RS232 Transceiver w/Shutdown
LT1139A 4-Driver/4-Receiver RS232 Transceiver w/Shutdown
LT1140A 5-Driver/3-Receiver RS232 Transceiver w/o Charge Pump
LT1141A 3-Driver/5-Receiver RS232 Transceiver w/o Charge Pump
LT1130A 5-Driver/5-Receiver RS232 Transceiver
LT1131A 5-Driver/4-Receiver RS232 Transceiver w/Shutdown
LT1132A 5-Driver/3-Receiver RS232 Transceiver
LT1133A 3-Driver/5-Receiver RS232 Transceiver
LT1134A 4-Driver/4-Receiver RS232 Transceiver
LT1135A 5-Driver/3-Receiver RS232 Transceiver w/o Charge Pump
R
LT1130A • TA02
RECEIVER
OUTPUT
C
L
= 50pF
DRIVER
OUTPUT
R
L
= 3k
C
L
= 2500pF
INPUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
5V V
CC
DRIVER OUT
RX IN
DRIVER OUT
RX IN
RX IN
RX IN
DRIVER OUT
RX IN
ON/OFF = 5V
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
RX OUT
DRIVER IN
RX OUT
V
+
0.1µF
0.1µF
× 2
0.1µF
× 2
0.1µF
GND
DRIVER DISABLE
TO LINE
TO LOGIC
V
–
1130A • TA01
LT1137A
Basic Operation Output Waveforms
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
2
LT1130A/LT1140A Series
A
U
G
W
A
W
U
W
ARBSOLUTEXI T
IS
(Note 1)
Supply Voltage (V
CC
) ................................................ 6V
V
+
........................................................................ 13.2V
V
–
(Note 7) ....................................................... –13.2V
Input Voltage
Driver ........................................................... V
–
to V
+
Receiver ............................................... – 30V to 30V
On/Off Pin............................................. –0.3V to 12V
Driver Disable Pin................... –0.3V to (V
CC
+ 0.3V)
Output Voltage
Driver .................................................... – 30V to 30V
Receiver ................................. –0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration
V
+
................................................................... 30 sec
V
–
................................................................... 30 sec
Driver Output.............................................. Indefinite
Receiver Output.......................................... Indefinite
Operating Temperature Range
LT113XAC/LT114XAC ............................ 0°C to 70°C
LT113XAI/LT114XAI............................. –40° to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER ORDER PART
NUMBER
PRODUCT SELECTIO TABLE
U
Part Number Power Supply Voltages* Shutdown Driver Disable Drivers Receivers External Components
LT1130A 5 No No 5 5 4 Capacitors
LT1131A 5 Yes Yes 5 4 4 Capacitors
LT1132A 5 No No 5 3 4 Capacitors
LT1133A** 5 No No 3 5 4 Capacitors
LT1134A 5 No No 4 4 4 Capacitors
LT1135A 5, 12, –12 No No 5 3 None
LT1136A 5 Yes Yes 4 5 4 Capacitors
LT1137A** 5 Yes Yes 3 5 4 Capacitors
LT1138A 5 Yes Yes 5 3 4 Capacitors
LT1139A 5, 12 Yes No 4 4 2 Capacitors
LT1140A 5, 12, –12 Yes Yes 5 3 None
LT1141A** 5, 12, –12 Yes Yes 3 5 None
*The LT1130A, LT1131A, LT1132A, LT1134A, LT1136A, LT1137A and LT1138A can operate with 5V and 12V supplies and two external capacitors.
**Meets ±15kV ESD air gap discharge and ±8kV contact methods per IEC-1000-4-2.
WU
U
PACKAGE/ORDER I FOR ATIO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
V
–
C2
–
C2
+
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
GND
SW PACKAGE
28-LEAD PLASTIC SO WIDE
NW PACKAGE
28-LEAD PDIP
LT1130A
5-DRIVER/5-RECEIVER
LT1130ACNW
LT1130ACSW
LT1130AISW
T
JMAX
= 150°C, θ
JA
= 56°C/W (NW)
T
JMAX
= 150°C, θ
JA
= 68°C/W (SW)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
–
C2
–
C2
+
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
GND
DRIVER DISABLE
SW PACKAGE
28-LEAD PLASTIC SO WIDE
NW PACKAGE
28-LEAD PDIP
LT1131A
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
ON/OFF
T
JMAX
= 150°C, θ
JA
= 56°C/W (NW)
T
JMAX
= 150°C, θ
JA
= 68°C/W (SW)
5-DRIVER/4-RECEIVER WITH SHUTDOWN
LT1131ACNW
LT1131ACSW
3
LT1130A/LT1140A Series
WU
U
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
5-DRIVER/3-RECEIVER
WITHOUT CHARGE PUMP
4-DRIVER/4-RECEIVER ORDER PART
NUMBER ORDER PART
NUMBER
ORDER PART
NUMBER ORDER PART
NUMBER
3-DRIVER/5-RECEIVER
T
JMAX
= 150°C, θ
JA
= 58°C/W (N)
T
JMAX
= 150°C, θ
JA
= 80°C/W (SW)
T
JMAX
= 150°C, θ
JA
= 58°C/W (N)
T
JMAX
= 150°C, θ
JA
= 80°C/W (SW) T
JMAX
= 150°C, θ
JA
= 79°C/W (N)
T
JMAX
= 150°C, θ
JA
= 85°C/W (SW)
T
JMAX
= 150°C, θ
JA
= 56°C/W (NW)
T
JMAX
= 150°C, θ
JA
= 68°C/W (SW)
T
JMAX
= 150°C, θ
JA
= 96°C/W (G)
T
JMAX
= 150°C, θ
JA
= 56°C/W (NW)
T
JMAX
= 150°C, θ
JA
= 68°C/W (SW)
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
24
23
22
21
20
19
18
17
16
15
14
13
V
–
C2
–
C2
+
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
GND
SW PACKAGE
24-LEAD PLASTIC SO WIDE
N PACKAGE
24-LEAD PDIP
LT1134A
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
–
C2
–
C2
+
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
GND
DRIVER DISABLE
SW PACKAGE
28-LEAD PLASTIC SO WIDE
NW PACKAGE
28-LEAD PDIP
LT1136A
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
RX IN
ON/OFF
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
24
23
22
21
20
19
18
17
16
15
14
13
V
–
C2
–
C2
+
DRIVER IN
DRIVER IN
RX OUT
DRIVER IN
DRIVER IN
RX OUT
DRIVER IN
RX OUT
GND
SW PACKAGE
24-LEAD PLASTIC SO WIDE
N PACKAGE
24-LEAD PDIP
LT1132A
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
RX IN
LT1132ACN
LT1132ACSW
LT1132AISW
T
JMAX
= 150°C, θ
JA
= 58°C/W (N)
T
JMAX
= 150°C, θ
JA
= 80°C/W (SW)
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
24
23
22
21
20
19
18
17
16
15
14
13
V
–
C2
–
C2
+
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
RX OUT
DRIVER IN
RX OUT
GND
SW PACKAGE
24-LEAD PLASTIC SO WIDE
N PACKAGE
24-LEAD PDIP
LT1133A
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
RX IN
RX IN
DRIVER OUT
RX IN
LT1133ACN
LT1133ACSW
LT1133AISW
ORDER PART
NUMBER
5-DRIVER/3-RECEIVER
1
2
3
4
5
6
7
8
9
10
TOP VIEW
20
19
18
17
16
15
14
13
12
11
–12V V
–
DRIVER IN
DRIVER IN
RX OUT
DRIVER IN
DRIVER IN
RX OUT
DRIVER IN
RX OUT
GND
SW PACKAGE
20-LEAD PLASTIC SO WIDE
N PACKAGE
20-LEAD PDIP
12V V
+
5V V
CC
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
RX IN
LT1135A
LT1134ACN
LT1134ACSW
LT1134AIN
LT1134AISW
LT1135ACN
LT1135ACSW
LT1137ACG
LT1137ACNW
LT1137ACSW
LT1137AIG
LT1137AINW
LT1137AISW
3-DRIVER/5-RECEIVER WITH SHUTDOWN4-DRIVER/5-RECEIVER WITH SHUTDOWN
LT1136ACNW
LT1136ACSW
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V–
C2–
C2+
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
RX OUT
DRIVER IN
RX OUT
GND
DRIVER DISABLE
NC
SW PACKAGE
28-LEAD PLASTIC SO WIDE
NW PACKAGE
28-LEAD PDIP
LT1137A
V+
5V VCC
C1+
C1–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
RX IN
RX IN
DRIVER OUT
RX IN
ON/OFF
NC
G PACKAGE
28-LEAD PLASTIC SSOP
4
LT1130A/LT1140A Series
The ● denotes the specifications which apply over the full operating
ELECTRICAL C CHARA TERISTICS
ORDER PART
NUMBER
WU
U
PACKAGE/ORDER I FOR ATIO
5-DRIVER/3-RECEIVER WITH SHUTDOWN
T
JMAX
= 150°C, θ
JA
= 96°C/W (G)
T
JMAX
= 150°C, θ
JA
= 56°C/W (NW)
T
JMAX
= 150°C, θ
JA
= 68°C/W (SW)
5-DRIVER/3-RECEIVER WITH SHUTDOWN
WITHOUT CHARGE PUMP
Consult factory for Industrial and Military grade parts.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
–
C2
–
C2
+
DRIVER IN
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
GND
DRIVER DISABLE
NC
SW PACKAGE
28-LEAD PLASTIC SO WIDE
NW PACKAGE
28-LEAD PDIP
LT1138A
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
ON/OFF
NC
G PACKAGE
28-LEAD PLASTIC SSOP
LT1138ACG
LT1138ACNW
LT1138ACSW
LT1138AIG
T
JMAX
= 150°C, θ
JA
= 58°C/W (N)
T
JMAX
= 150°C, θ
JA
= 80°C/W (SW)
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
24
23
22
21
20
19
18
17
16
15
14
13
V
–
C
–
C
+
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
GND
SW PACKAGE
24-LEAD PLASTIC SO WIDE
N PACKAGE
24-LEAD PDIP
LT1139A
N.C.
5V V
CC
12V INPUT
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
ON/OFF
LT1139ACN
LT1139ACSW
4-DRIVER/4-RECEIVER WITH SHUTDOWN
WITH 12V AND 5V SUPPLIES ORDER PART
NUMBER
ORDER PART
NUMBER
ORDER PART
NUMBER
LT1140ACN
LT1140ACSW
T
JMAX
= 150°C, θ
JA
= 58°C/W (N)
T
JMAX
= 150°C, θ
JA
= 80°C/W (SW)
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
24
23
22
21
20
19
18
17
16
15
14
13
–12V V
–
N.C.
DRIVER IN
DRIVER IN
RX OUT
DRIVER IN
DRIVER IN
RX OUT
DRIVER IN
RX OUT
GND
DRIVER DISABLE
SW PACKAGE
24-LEAD PLASTIC SO WIDE
N PACKAGE
24-LEAD PDIP
LT1140A
12V V
+
5V V
CC
N.C.
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
RX IN
ON/OFF
3-DRIVER/5-RECEIVER WITH SHUTDOWN
WITHOUT CHARGE PUMP
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
24
23
22
21
20
19
18
17
16
15
14
13
–12V V
–
N.C.
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
GND
DRIVER DISABLE
SW PACKAGE
24-LEAD PLASTIC SO WIDE
N PACKAGE
24-LEAD PDIP
LT1141A
12V V
+
5V V
CC
N.C.
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
RX IN
ON/OFF
LT1141ACN
LT1141ACSW
T
JMAX
= 150°C, θ
JA
= 58°C/W (N)
T
JMAX
= 150°C, θ
JA
= 80°C/W (SW)
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply Generator
V
+
Output 8.6 V
V
–
Output –7.8 V
5V V
CC
Supply Current: LT1130A, LT1131A, LT1132A, (Note 3) ●15 25 mA
LT1133A, LT1134A, LT1136A, LT1138A
5V V
CC
Supply Current: LT1135A, LT1140A, LT1141A (Note 3), V
+
= 12V, V
–
= –12V ●815 mA
5V V
CC
Supply Current: LT1137A (Note 3) ●12 17 mA
5V V
CC
Supply Current: LT1139A (Note 3), V
+
= 12V ●815 mA
12V V
+
Supply Current: LT1135A, LT1140A, LT1141A (Note 3), V
–
= –12V ●14 mA
12V V
+
Supply Current: LT1139A (Note 3) ●610 mA
–12V V
–
Supply Current: LT1135A, LT1140A, LT1141A (Note 3) V
+
= 12V ●26 mA
5
LT1130A/LT1140A Series
ELECTRICAL C CHARA TERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Current when OFF (V
CC
) Shutdown (Note 4) ●110 µA
Driver Disable 4 mA
Supply Rise Time C1, C2, C
+
, C
–
= 1.0µF 2.0 ms
Shutdown to Turn-On C
+
, C
–
= 0.1µF, C1, C2 = 0.2µF 0.2 ms
ON/OFF Pin Thresholds Input Low Level (Device Shut Down) ●1.4 0.8 V
Input High Level (Device Enabled) ●2.4 1.4 V
ON/OFF Pin Current 0V ≤ V
ON/OFF
≤ 5V ●–15 80 µA
DRIVER DISABLE Pin Thresholds Input Low Level (Drivers Enabled) ●1.4 0.8 V
Input High Level (Drivers Disabled) ●2.4 1.4 V
DRIVER DISABLE Pin Current 0V ≤ V
DRIVER DISABLE
≤ 5V ●–10 500 µA
Oscillator Frequency 130 kHz
Any Driver
Output Voltage Swing Load = 3k to GND Positive ●5 7.3 V
Negative ●–6.5 – 5 V
Logic Input Voltage Level Input Low Level (V
OUT
= High) ●1.4 0.8 V
Input High Level (V
OUT
= Low) ●2 1.4 V
Logic Input Current 0.8V ≤ V
IN
≤ 2V ●520 µA
Output Short-Circuit Current V
OUT
= 0V ±9±17 mA
Output Leakage Current Shutdown V
OUT
= ±30V (Note 4) ●10 100 µA
Data Rate R
L
= 3k, C
L
= 2500pF 120 kbaud
R
L
= 3k, C
L
= 1000pF 250 kbaud
Slew Rate R
L
= 3k, C
L
= 51pF 15 30 V/µs
R
L
= 3k, C
L
= 2500pF (Note 8) 6 V/µs
Propagation Delay Output Transition t
HL
High to Low (Note 5) 0.6 1.3 µs
Output Transition t
LH
Low to High 0.5 1.3 µs
Any Receiver
Input Voltage Thresholds Input Low Threshold (V
OUT
= High) ●0.8 1.3 V
Input High Threshold (V
OUT
= Low) ●1.7 2.4 V
Hysteresis ●0.1 0.4 1 V
Input Resistance –10V < V
IN
< 10V 3 5 7 kΩ
Output Voltage Output Low, I
OUT
= –1.6mA ●0.2 0.4 V
Output High, I
OUT
= 160µA (V
CC
= 5V) ●3.5 4.2 V
Output Leakage Current Shutdown (Note 4) 0 ≤ V
OUT
≤ V
CC
●110 µA
Output Short-Circuit Current Sinking Current, V
OUT
= V
CC
–20 –10 mA
Sourcing Current, V
OUT
= 0V 10 20 mA
Propagation Delay Output Transition t
HL
High to Low (Note 6) 250 600 ns
Output Transition t
LH
Low to High 350 600 ns
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: Testing done at V
CC
= 5V and V
ON/OFF
= 3V.
Note 3: Supply current is measured with driver and receiver outputs
unloaded and the driver inputs tied high.
Note 4: Supply current and driver leakage current measurements in shut-
down are performed with V
ON/OFF
= 0.1V. Supply current measurements
using DRIVER DISABLE are performed with V
DRIVER DISABLE
= 3V. For
LT1135, LT1139, LT1140 and LT1141 with 12V supplies, V
OUT
leakage is
200µA for V
OUT
forced to ±25V.
Note 5: For driver delay measurements, R
L
= 3k and C
L
= 51pF. Trigger
points are set between the driver’s input logic threshold and the output
transition to the zero crossing (t
HL
= 1.4V to 0V and t
LH
= 1.4V to 0V).
Note 6: F
or receiver delay measurements, CL = 51pF. Trigger points
are set between the receiver’s input logic threshold and the output
transition to standard TTL/CMOS logic threshold (tHL = 1.3V to 2.4V
and tLH = 1.7V to 0.8V).
Note 7: For LT1133A/LT1137A, absolute maximum externally applied
V– = –6.5V. Internal charge pump will drive this pin to a higher nega-
tive voltage.
Note 8: For LT1137A, 4V/µs minimum.
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
6
LT1130A/LT1140A Series
CCHARA TERISTICS
UW
ATYPICALPER
FORCE
Driver Output Voltage
Driver Disable ThresholdSupply Current in Shutdown
ON/OFF Thresholds Supply Current Driver Leakage in Shutdown
Supply Current vs Data RateReceiver Input Thresholds
TEMPERATURE (°C)
–55
0.1
SUPPLY CURRENT (µA)
1
10
100
–25 0 25 50
LT1137A • TPC04
75 100 125
TEMPERATURE (°C)
–55
THRESHOLD VOLTAGE (V)
2.0
2.5
3.0
25 75
LT1137A • TPC06
1.5
1.0
–25 0 50 100 125
0.5
0
TEMPERATURE (°C)
–55
THRESHOLD VOLTAGE (V)
2.0
2.5
3.0
25 75
LT1137A • TPC07
1.5
1.0
–25 0 50 100 125
0.5
0
ON THRESHOLD
OFF THRESHOLD
TEMPERATURE (°C)
–55
0
SUPPLY CURRENT (mA)
2
5
050 75
LT1137A • TPC05
1
4
3
–25 25 100 125
TEMPERATURE (°C)
–55
0.50
THRESHOLD VOLTAGE (V)
0.75
1.25
1.50
1.75
3.00
2.25
050 75
LT1137A • TPC02
1.00
2.50
2.75
2.00
–25 25 100 125
INPUT HIGH
INPUT LOW
TEMPERATURE (°C)
–55
–10
DRIVER OUTPUT VOLTAGE (V)
–8
–4
–2
0
10
4
050 75
LT1130A • TPC01
–6
6
8
2
–25 25 100 125
OUTPUT HIGH
OUTPUT LOW
R
L
= 3k
V
CC
= 5V
V
CC
= 4.5V
V
CC
= 5.5V
V
CC
= 4.5V
V
CC
= 5V
V
CC
= 5.5V
DATA RATE (kBaud)
0
0
SUPPLY CURRENT (mA)
20
30
40
50
60
70
25 50 75 100
LT1130A • TPC03
125
80
90
100
10
150
5 DRIVER
R
L
= 3k
C
L
= 2500pF
3 DRIVER
R
L
= 3k
C
L
= 2500pF
TEMPERATURE (°C)
–55
0
SUPPLY CURRENT (mA)
5
15
20
25
50
35
050 75
LT1130A • TPC08
10
40
45
30
–25 25 100 125
5 DRIVER
3 DRIVER
1 DRIVER
NO LOAD
Supply Current in Driver Disable
TEMPERATURE (°C)
0.1
LEAKAGE CURRENT (µA)
10
100
LT1137A • TPC09
1
–55 0 50 75
–25 25 100 125
V
OUT
= –30V
V
OUT
= 30V
7
LT1130A/LT1140A Series
CCHARA TERISTICS
UW
ATYPICALPER
FORCE
Shutdown to Driver Output
Receiver Short-Circuit Current
Driver Short-Circuit Current
Driver Output Waveforms
LT1137A • TPC12
10
5
0
–10
–5
DRIVER OUTPUT
R
L
= 3k
C
L
= 2500pF
INPUT
DRIVER OUTPUT
R
L
= 3k
PI FU CTIO S
U
UU
V
CC
: 5V Input Supply Pin. Supply current drops to zero in
the shutdown mode. This pin should be decoupled with a
0.1µF ceramic capacitor close to the package pin. Insuffi-
cient supply bypassing can result in low output drive levels
and erratic charge pump operation.
GND: Ground Pin.
ON/OFF: Control the operation mode of the device and is
TTL/CMOS compatible. A logic low puts the device in the
shutdown mode which reduces input supply curent to zero
and places all of the drivers and receivers in high imped-
ance state. A logic high fully enables the transceiver.
DRIVER DISABLE: This pin provides an alternate control
for the charge pump and RS232 drivers. A logic high on
this pin shuts down the charge pump and places all drivers
in a high impedance state. Receivers remain active under
these conditions. Floating the DRIVER DISABLE pin or
driving it to a logic low level fully enables the transceiver.
A logic low on the ON/OFF pin supersedes the state of the
DRIVER DISABLE pin. Supply current drops to 4mA when
in driver disable mode.
V
+
: Positive Supply Output (RS232 Drivers). V
+
≈ 2V
CC
–
1.5V. This pin requires an external charge storage capaci-
tor C ≥ 1.0µF, tied to ground or V
CC
. 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. For large numbers of transceivers,
increasing the size of the shared common storage capaci-
tors is recommended to reduce ripple.
TEMPERATURE (°C)
–55
SHORT-CIRCUIT CURRENT (mA)
20
25
30
25 75
LT1137A • TPC10
15
10
–25 0 50 100 125
5
0
ISC
+
ISC
–
TEMPERATURE (°C)
–55
0
SHORT-CIRCUIT CURRENT (mA)
20
50
050 75
LT1137A • TPC11
10
40
30
–25 25 100 125
ISC
+
ISC
–
LT1137A • TPC13
DRIVER
OUTPUT HIGH
R
L
= 3k
ON/OFF PIN
DRIVER
OUTPUT LOW
R
L
= 3k
8
LT1130A/LT1140A Series
PI FU CTIO S
U
UU
V
–
: Negative Supply Output (RS232 Drivers). V
–
≈ –(2V
CC
– 2.5V). This pin requires an external charge storage
capacitor C ≥ 0.1µF. V
–
is short-circuit proof for
30 seconds.
C1
+
, C1
–
, C2
+
, C2
–
:
Commutating Capacitor Inputs.
These pins require two external capacitors C ≥ 0.2µF: one
from C1+ to C1–, and another from C2+ to C2–. To
maintain charge pump efficiency, the capacitor’s effective
series resistance should be less than 2Ω. For C ≥ 1µF, low
ESR tantalum capacitors work well in this application,
although small value ceramic capacitors may be used
with a minimal reduction in charge pump compliance. In
applications where larger positive voltages are available,
such as 12V, C1 may be omitted and the positive voltage
may be connected directly to the C1+ pin. In this mode of
operation, the V+ pin should be decoupled with a 0.1µF
ceramic capacitor.
DRIVER IN: RS232 Driver Input Pins. These inputs are
TTL/CMOS compatible. Inputs should not be allowed to
float. Tie unused inputs to V
CC
.
DRIVER 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, V
CC
= 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.
RX IN: Receiver Inputs. These pins accept RS232 level
signals (±30V) into a protected 5k terminating 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.
RX OUT: Receiver Outputs with TTL/CMOS Voltage Lev-
els. Outputs are in a high impedance state when in shut-
down mode to allow data line sharing. Outputs are fully
short-circuit protected to ground or V
CC
with the power
on, off, or in shutdown mode.
ESD PROTECTIO
U
The RS232 line inputs of the LT1130A/LT1140A series of
RS232 Driver/Receivers have on-chip protection from
ESD transients up to ±10kV. The protection structures act
to divert the static discharge safely to system ground. In
order for the ESD protection to function effectively, the
power supply and ground pins of the LT1130A/LT1140A
must be connected to ground through low impedances.
The power supply decoupling capacitors and charge
pump storage capacitors provide this low impedance in
normal application of the circuit. The only constraint is
that low ESR capacitors must be used for bypassing and
charge storage. ESD testing must be done with pins VCC,
V+, V– and GND shorted to ground or connected with low
ESR capacitors.
The ESD protection on the LT1133A, LT1137A and
LT1141A meets ±15kV air gap discharge and ±8kV con-
tact methods per IEC-1000-4-2.
LT1130A • ESD TC
5V V
CC
0.1µF
0.2µF
0.1µF
RS232
LINE PINS
PROTECTED
TO ±15kV
LT1137A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DRIVER 1 OUT
RX1 IN
DRIVER 2 OUT
RX2 IN
RX3 IN
RX4 IN
DRIVER 3 OUT
RX5 IN
ON/OFF
28
27
26
25
24
23
22
21
20
19
18
17
16
15
0.2µF
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
V
–
V
+
0.1µF
GND
DRIVER DISABLE
+
+
ESD Test Circuit
9
LT1130A/LT1140A Series
TYPICAL APPLICATIO S
U
Operation Using 5V and 12V Power Supplies
Typical Mouse Driving Application
LT1130A • TA03
5V V
CC
12V V
+
0.1µF
TO LINE
LT1137A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DRIVER OUT
RX IN
DRIVER OUT
RX IN
RX IN
RX IN
DRIVER OUT
RX IN
ON/0FF = 5V
28
27
26
25
24
23
22
21
20
19
18
17
16
15
0.1µF
× 2
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
RX OUT
DRIVER IN
RX OUT
TO LOGIC
V
–
V
CC
C1
–
C1
+
0.01µF0.01µF
GND
DRIVER DISABLE
V
+
LT1130A • TA04
5V VCC
0.1µF
0.1µF
× 2
0.1µF
DB9
LT1137A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DRIVER 1 OUT
RX1 IN
DRIVER 2 OUT
RX2 IN
RX3 IN
RX4 IN
DRIVER 3 OUT
RX5 IN
ON/OFF
28
27
26
25
24
23
22
21
20
19
18
17
16
15
0.1µF
× 2
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
GND
DRIVER DISABLE
MOUSE
V–
V+
LOGIC “0”
LOGIC “0”
MOUSE DATA
LOGIC “1”
DCD
DSR
RX
RTS
TX
CTS
DTR
RI
(1)
(9)
(5)
LOGIC
OPTICS
V+
V–
10
LT1130A/LT1140A Series
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
U
G Package
28-Lead Plastic SSOP (0.209)
(LTC DWG # 05-08-1640)
G28 SSOP 0694
0.005 – 0.009
(0.13 – 0.22)
0° – 8°
0.022 – 0.037
(0.55 – 0.95)
0.205 – 0.212**
(5.20 – 5.38)
0.301 – 0.311
(7.65 – 7.90)
12345678 9 10 11 12 1413
0.397 – 0.407*
(10.07 – 10.33)
2526 22 21 20 19 18 17 16 1523242728
0.068 – 0.078
(1.73 – 1.99)
0.002 – 0.008
(0.05 – 0.21)
0.0256
(0.65)
BSC 0.010 – 0.015
(0.25 – 0.38)
DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*
**
N Package
20-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
N20 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)
0.009 – 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
()
0.255 ± 0.015*
(6.477 ± 0.381)
1.040*
(26.416)
MAX
12345678910
19 1112
131416 1517
18
20
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
N Package
24-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
N24 1197
0.255 ± 0.015*
(6.477 ± 0.381)
1.265*
(32.131)
MAX
12345678910
19
11 12
131416 151718
20
21
2223
24
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)
11
LT1130A/LT1140A Series
PACKAGE DESCRIPTIO
U
Dimensions in inches (millimeters) unless otherwise noted.
NW Package
28-Lead PDIP (Wide 0.600)
(LTC DWG # 05-08-1520)
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.
S24 (WIDE) 0996
NOTE 1
0.598 – 0.614*
(15.190 – 15.600)
22 21 20 19 18 17 16 15
12345678
0.394 – 0.419
(10.007 – 10.643)
910
1314
11 12
2324
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
*
**
N28 1197
0.505 – 0.560*
(12.827 – 14.224)
1.455*
(36.957)
MAX
12345678910
27 19
20212224 23
252628
11 12 13 14
15
16
1718
0.070
(1.778)
TYP
0.015
(0.381)
MIN
0.125
(3.175)
MIN
0.150 ± 0.005
(3.810 ± 0.127)
0.018 ± 0.003
(0.457 ± 0.076)
0.035 – 0.080
(0.889 – 2.032)
0.100 ± 0.010
(2.540 ± 0.254)
0.045 – 0.065
(1.143 – 1.651)
0.009 – 0.015
(0.229 – 0.381)
0.625 +0.035
–0.015
+0.889
–0.381
15.87
()
0.600 – 0.625
(15.240 – 15.875)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
SW Package
24-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
SW Package
20-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
S20 (WIDE) 0396
NOTE 1
0.496 – 0.512*
(12.598 – 13.005)
20 19 18 17 16 15 14 13
12345678
0.394 – 0.419
(10.007 – 10.643)
910
1112
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
LT1130A/LT1140A Series
Dimensions in inches (millimeters) unless otherwise noted.
LINEAR TECHNOLOGY CORPORATION 1993
1130asfb LT/TP 0799 2K REV B • PRINTED IN USA
PACKAGE DESCRIPTIO
U
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
(408) 432-1900
FAX: (408) 434-0507
●
TELEX: 499-3977
●
www.linear-tech.com
5V V
CC
1µF
1µF
TO
RS232
LINE
LT1133A
1
2
3
4
5
6
7
8
9
10
11
12
DRIVER OUT
RX IN
DRIVER OUT
RX IN
RX IN
RX IN
DRIVER OUT
RX IN
24
23
22
21
20
19
18
17
16
15
14
13
1µF
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
RX OUT
DRIVER IN
RX OUT
V
–
V
+
GND
C1
+
C1
–
C2
–
C2
+
TO
LOGIC
TO
RS232
LINE
LT1130A • TA05
LT1141A
1
2
3
4
5
6
7
8
9
10
11
12
5V V
CC
NC
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
RX IN
ON/OFF
24
23
22
21
20
19
18
17
16
15
14
13
NC
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
DRIVER
DISABLE
V
–
V
+
TO
LOGIC
1µF
GND
+
+
+
+
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LT1180A/LT1181A 2-Driver/2-Receiver RS232 Transceivers Single 5V Supply with 0.1µF Capacitors
LT1237 3-Driver/5-Receiver RS232 Transceiver Lower Power Upgrade for LT1137A
LTC1327 3-Driver/5-Receiver RS562 Transceiver 3.3V Operation
LTC1337 3-Driver/5-Receiver RS232 Transceiver Ultralow Power for DTE Applications
LTC1338 5-Driver/3-Receiver RS232 Transceiver Ultralow Power for DCE Applications
LTC1348 3-Driver/5-Receiver RS232 Transceiver 3.3V to 5V Operation
TYPICAL APPLICATION
U
Sharing Power Supply Generator with a Second Transceiver
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
S28 (WIDE) 0996
NOTE 1
0.697 – 0.712*
(17.70 – 18.08)
12345678
0.394 – 0.419
(10.007 – 10.643)
910
2526
11 12
22 21 20 19 18 17 16 152324
1413
2728
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
*
**
SW Package
28-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
