LT1130A/LT1140A Series
Advanced Low Power
5V RS232 Drivers/Receivers
with Small Capacitors
FEATURES
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
s
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.
TYPICAL APPLICATIO
Basic Operation
V
+
1
0.1µF
0.1µF
×
2
DRIVER OUT
RX IN
DRIVER OUT
TO LINE
RX IN
RX IN
RX IN
DRIVER OUT
RX IN
ON/OFF = 5V
5V V
CC
2
3
4
5
6
7
8
9
10
11
12
13
14
LT1137A
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
–
0.1µF
×
2
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
RX OUT
DRIVER IN
RX OUT
GND
DRIVER DISABLE
TO LOGIC
0.1µF
RECEIVER
OUTPUT
C
L
= 50pF
DRIVER
R
OUTPUT
R
L
= 3k
C
L
= 2500pF
INPUT
1130A • TA01
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
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
U
Output Waveforms
LT1130A • TA02
U
1
LT1130A/LT1140A Series
ABSOLUTE
AXI U
RATI GS
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)
PRODUCT SELECTIO TABLE
Part Number
LT1130A
LT1131A
LT1132A
LT1133A**
LT1134A
LT1135A
LT1136A
LT1137A**
LT1138A
LT1139A
LT1140A
LT1141A**
Power Supply Voltages*
5
5
5
5
5
5, 12, –12
5
5
5
5, 12
5, 12, –12
5, 12, –12
Shutdown
No
Yes
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
*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.
PACKAGE/ORDER I FOR ATIO
5-DRIVER/5-RECEIVER
TOP VIEW
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
1
2
3
4
5
6
7
8
9
LT1130A
28 V
–
27 C2
–
26 C2
+
25 DRIVER IN
24 RX OUT
23 DRIVER IN
22 RX OUT
21 DRIVER IN
20 RX OUT
19 DRIVER IN
18 RX OUT
17 DRIVER IN
16 RX OUT
15 GND
SW PACKAGE
28-LEAD PLASTIC SO WIDE
ORDER PART
NUMBER
LT1130ACNW
LT1130ACSW
LT1130AISW
RX IN 10
DRIVER OUT 11
RX IN 12
DRIVER OUT 13
RX IN 14
NW PACKAGE
28-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 56°C/W (NW)
T
JMAX
= 150°C,
θ
JA
= 68°C/W (SW)
2
U
U
W
W W
U
U
W
(Note 1)
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
Driver Disable
No
Yes
No
No
No
No
Yes
Yes
Yes
No
Yes
Yes
Drivers
5
5
5
3
4
5
4
3
5
4
5
3
Receivers
5
4
3
5
4
3
5
5
3
4
3
5
External Components
4 Capacitors
4 Capacitors
4 Capacitors
4 Capacitors
4 Capacitors
None
4 Capacitors
4 Capacitors
4 Capacitors
2 Capacitors
None
None
5-DRIVER/4-RECEIVER WITH SHUTDOWN
TOP VIEW
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
1
2
3
4
5
6
7
8
9
LT1131A
28 V
–
27 C2
–
26 C2
+
25 DRIVER IN
24 RX OUT
23 DRIVER IN
22 RX OUT
21 DRIVER IN
20 RX OUT
19 DRIVER IN
18 RX OUT
17 DRIVER IN
16 GND
15 DRIVER DISABLE
SW PACKAGE
28-LEAD PLASTIC SO WIDE
ORDER PART
NUMBER
LT1131ACNW
LT1131ACSW
RX IN 10
DRIVER OUT 11
RX IN 12
DRIVER OUT 13
ON/OFF 14
NW PACKAGE
28-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 56°C/W (NW)
T
JMAX
= 150°C,
θ
JA
= 68°C/W (SW)
LT1130A/LT1140A Series
PACKAGE/ORDER I FOR ATIO
5-DRIVER/3-RECEIVER
TOP VIEW
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
DRIVER OUT
1
2
3
4
5
6
7
8
9
LT1132A
24
V
–
ORDER PART
NUMBER
LT1132ACN
LT1132ACSW
LT1132AISW
23 C2
–
22 C2
+
21 DRIVER IN
20 DRIVER IN
19 RX OUT
18 DRIVER IN
17 DRIVER IN
16 RX OUT
15 DRIVER IN
14 RX OUT
13 GND
RX IN 10
DRIVER OUT 11
RX IN 12
N PACKAGE
24-LEAD PDIP
SW PACKAGE
24-LEAD PLASTIC SO WIDE
T
JMAX
= 150°C,
θ
JA
= 58°C/W (N)
T
JMAX
= 150°C,
θ
JA
= 80°C/W (SW)
4-DRIVER/4-RECEIVER
TOP VIEW
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
1
2
3
4
5
6
7
8
9
LT1134A
24 V
–
23 C2
–
22 C2
+
21 DRIVER IN
20 RX OUT
19 DRIVER IN
18 RX OUT
17 DRIVER IN
16 RX OUT
15 DRIVER IN
14 RX OUT
13 GND
SW PACKAGE
24-LEAD PLASTIC SO WIDE
ORDER PART
NUMBER
LT1134ACN
LT1134ACSW
LT1134AIN
LT1134AISW
RX IN 10
DRIVER OUT 11
RX IN 12
N PACKAGE
24-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 58°C/W (N)
T
JMAX
= 150°C,
θ
JA
= 80°C/W (SW)
4-DRIVER/5-RECEIVER WITH SHUTDOWN
TOP VIEW
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
1
2
3
4
5
6
7
8
9
LT1136A
28 V
–
27 C2
–
26 C2
+
25 DRIVER IN
24 RX OUT
23 DRIVER IN
22 RX OUT
21 DRIVER IN
20 RX OUT
19 DRIVER IN
18 RX OUT
17 RX OUT
16 GND
15 DRIVER DISABLE
SW PACKAGE
28-LEAD PLASTIC SO WIDE
ORDER PART
NUMBER
LT1136ACNW
LT1136ACSW
RX IN 10
DRIVER OUT 11
RX IN 12
RX IN 13
ON/OFF 14
NW PACKAGE
28-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 56°C/W (NW)
T
JMAX
= 150°C,
θ
JA
= 68°C/W (SW)
U
3-DRIVER/5-RECEIVER
TOP VIEW
V
+
5V V
CC
C1
+
W
U
ORDER PART
NUMBER
LT1133ACN
LT1133ACSW
LT1133AISW
1
2
3
4
5
6
7
8
9
LT1133A
24 V
–
23 C2
–
22 C2
+
C1
–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
RX IN
21 DRIVER IN
20 RX OUT
19 DRIVER IN
18 RX OUT
17 RX OUT
16 RX OUT
15 DRIVER IN
14 RX OUT
13 GND
SW PACKAGE
24-LEAD PLASTIC SO WIDE
RX IN 10
DRIVER OUT 11
RX IN 12
N PACKAGE
24-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 58°C/W (N)
T
JMAX
= 150°C,
θ
JA
= 80°C/W (SW)
5-DRIVER/3-RECEIVER
WITHOUT CHARGE PUMP
TOP VIEW
12V V
+
5V V
CC
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
1
2
3
4
5
6
7
8
9
LT1135A
20 –12V V
–
19 DRIVER IN
18 DRIVER IN
17 RX OUT
16 DRIVER IN
15 DRIVER IN
14 RX OUT
13 DRIVER IN
12 RX OUT
11 GND
SW PACKAGE
20-LEAD PLASTIC SO WIDE
ORDER PART
NUMBER
LT1135ACN
LT1135ACSW
RX IN 10
N PACKAGE
20-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 79°C/W (N)
T
JMAX
= 150°C,
θ
JA
= 85°C/W (SW)
3-DRIVER/5-RECEIVER WITH SHUTDOWN
TOP VIEW
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
RX IN
DRIVER OUT
RX IN
RX IN
1
2
3
4
5
6
7
8
9
LT1137A
28 V
–
27 C2
–
26 C2
+
25 DRIVER IN
24 RX OUT
23 DRIVER IN
22 RX OUT
21 RX OUT
20 RX OUT
19 DRIVER IN
18 RX OUT
17 GND
16 DRIVER DISABLE
15 NC
NW PACKAGE
28-LEAD PDIP
SW PACKAGE
28-LEAD PLASTIC SO WIDE
ORDER PART
NUMBER
LT1137ACG
LT1137ACNW
LT1137ACSW
LT1137AIG
LT1137AINW
LT1137AISW
RX IN 10
DRIVER OUT 11
RX IN 12
ON/OFF 13
NC 14
G PACKAGE
28-LEAD PLASTIC SSOP
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)
3
LT1130A/LT1140A Series
PACKAGE/ORDER I FOR ATIO
5-DRIVER/3-RECEIVER WITH SHUTDOWN
TOP VIEW
V
+
5V V
CC
C1
+
C1
–
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
RX IN
1
2
3
4
5
6
7
8
9
LT1138A
28 V
–
27 C2
–
26 C2
+
25 DRIVER IN
24 DRIVER IN
23 RX OUT
22 DRIVER IN
21 RX OUT
20 DRIVER IN
19 RX OUT
18 DRIVER IN
17 GND
16 DRIVER DISABLE
15 NC
NW PACKAGE
28-LEAD PDIP
SW PACKAGE
28-LEAD PLASTIC SO WIDE
ORDER PART
NUMBER
LT1138ACG
LT1138ACNW
LT1138ACSW
LT1138AIG
DRIVER OUT 10
RX IN 11
DRIVER OUT 12
ON/OFF 13
NC 14
G PACKAGE
28-LEAD PLASTIC SSOP
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
TOP VIEW
12V V
+
5V V
CC
N.C.
DRIVER OUT
DRIVER OUT
RX IN
DRIVER OUT
DRIVER OUT
RX IN
1
2
3
4
5
6
7
8
9
LT1140A
24 –12V V
–
23 N.C.
22 DRIVER IN
21 DRIVER IN
20 RX OUT
19 DRIVER IN
18 DRIVER IN
17 RX OUT
16 DRIVER IN
15 RX OUT
14 GND
13 DRIVER DISABLE
SW PACKAGE
24-LEAD PLASTIC SO WIDE
ORDER PART
NUMBER
LT1140ACN
LT1140ACSW
DRIVER OUT 10
RX IN 11
ON/OFF 12
N PACKAGE
24-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 58°C/W (N)
T
JMAX
= 150°C,
θ
JA
= 80°C/W (SW)
Consult factory for Industrial and Military grade parts.
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
PARAMETER
Power Supply Generator
V
+
Output
V
–
Output
5V V
CC
Supply Current: LT1130A, LT1131A, LT1132A,
LT1133A, LT1134A, LT1136A, LT1138A
5V V
CC
Supply Current: LT1135A, LT1140A, LT1141A
5V V
CC
Supply Current: LT1137A
5V V
CC
Supply Current: LT1139A
12V V
+
Supply Current: LT1135A, LT1140A, LT1141A
12V V
+
Supply Current: LT1139A
– 12V
V
–
Supply Current: LT1135A, LT1140A, LT1141A
(Note 3)
CONDITIONS
ELECTRICAL CHARACTERISTICS
The
q
denotes the specifications which apply over the full operating
MIN
TYP
8.6
– 7.8
q
q
q
q
q
q
q
(Note 3), V
+
= 12V, V
–
= –12V
(Note 3)
(Note 3), V
+
= 12V
(Note 3), V
–
= – 12V
(Note 3)
(Note 3) V
+
= 12V
4
U
4-DRIVER/4-RECEIVER WITH SHUTDOWN
WITH 12V AND 5V SUPPLIES
TOP VIEW
N.C.
5V V
CC
12V INPUT
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
1
2
3
4
5
6
7
8
9
LT1139A
24 V
–
23 C
–
22 C
+
21 DRIVER IN
20 RX OUT
19 DRIVER IN
18 RX OUT
17 DRIVER IN
16 RX OUT
15 DRIVER IN
14 RX OUT
13 GND
SW PACKAGE
24-LEAD PLASTIC SO WIDE
W
U
ORDER PART
NUMBER
LT1139ACN
LT1139ACSW
DRIVER OUT 10
RX IN 11
ON/OFF 12
N PACKAGE
24-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 58°C/W (N)
T
JMAX
= 150°C,
θ
JA
= 80°C/W (SW)
3-DRIVER/5-RECEIVER WITH SHUTDOWN
WITHOUT CHARGE PUMP
TOP VIEW
12V V
+
5V V
CC
N.C.
RX IN
DRIVER OUT
RX IN
DRIVER OUT
RX IN
DRIVER OUT
1
2
3
4
5
6
7
8
9
LT1141A
24 –12V V
–
23 N.C.
22 RX OUT
21 DRIVER IN
20 RX OUT
19 DRIVER IN
18 RX OUT
17 DRIVER IN
16 RX OUT
15 RX OUT
14 GND
13 DRIVER DISABLE
SW PACKAGE
24-LEAD PLASTIC SO WIDE
ORDER PART
NUMBER
LT1141ACN
LT1141ACSW
RX IN 10
RX IN 11
ON/OFF 12
N PACKAGE
24-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 58°C/W (N)
T
JMAX
= 150°C,
θ
JA
= 80°C/W (SW)
MAX
UNITS
V
V
15
8
12
8
1
6
2
25
15
17
15
4
10
6
mA
mA
mA
mA
mA
mA
mA
LT1130A/LT1140A Series
ELECTRICAL CHARACTERISTICS
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
PARAMETER
Supply Current when OFF (V
CC
)
Supply Rise Time
Shutdown to Turn-On
ON/OFF Pin Thresholds
ON/OFF Pin Current
DRIVER DISABLE Pin Thresholds
DRIVER DISABLE Pin Current
Oscillator Frequency
Any Driver
Output Voltage Swing
Logic Input Voltage Level
Logic Input Current
Output Short-Circuit Current
Output Leakage Current
Data Rate
Slew Rate
Propagation Delay
Any Receiver
Input Voltage Thresholds
Hysteresis
Input Resistance
Output Voltage
Output Leakage Current
Output Short-Circuit Current
Propagation Delay
– 10V < V
IN
< 10V
Output Low, I
OUT
= – 1.6mA
Output High, I
OUT
= 160µA (V
CC
= 5V)
Shutdown (Note 4) 0
≤
V
OUT
≤
V
CC
Sinking Current, V
OUT
= V
CC
Sourcing Current, V
OUT
= 0V
Output Transition t
HL
High to Low (Note 6)
Output Transition t
LH
Low to High
q
q
q
CONDITIONS
Shutdown (Note 4)
Driver Disable
C1, C2, C
+
, C
–
= 1.0µF
C
+
, C
–
= 0.1µF, C1, C2 = 0.2µF
Input Low Level (Device Shut Down)
Input High Level (Device Enabled)
0V
≤
V
ON/OFF
≤
5V
Input Low Level (Drivers Enabled)
Input High Level (Drivers Disabled)
0V
≤
V
DRIVER DISABLE
≤
5V
q
q
q
q
q
q
q
MIN
TYP
1
4
2.0
0.2
MAX
10
UNITS
µA
mA
ms
ms
2.4
– 15
2.4
– 10
1.4
1.4
1.4
1.4
130
0.8
80
0.8
500
V
V
µA
V
V
µA
kHz
V
V
V
V
µA
mA
µA
kbaud
kbaud
Load = 3k to GND Positive
Negative
Input Low Level (V
OUT
= High)
Input High Level (V
OUT
= Low)
0.8V
≤
V
IN
≤
2V
V
OUT
= 0V
Shutdown V
OUT
=
±30V
(Note 4)
R
L
= 3k, C
L
= 2500pF
R
L
= 3k, C
L
= 1000pF
R
L
= 3k, C
L
= 51pF
R
L
= 3k, C
L
= 2500pF (Note 8)
Output Transition t
HL
High to Low (Note 5)
Output Transition t
LH
Low to High
Input Low Threshold (V
OUT
= High)
Input High Threshold (V
OUT
= Low)
q
q
q
q
q
5
7.3
– 6.5
1.4
1.4
5
±17
10
–5
0.8
20
100
2
±9
q
120
250
15
6
0.6
0.5
q
q
q
30
1.3
1.3
V/µs
V/µs
µs
µs
V
V
V
kΩ
V
V
µA
mA
mA
ns
ns
0.8
0.1
3
3.5
1.3
1.7
0.4
5
0.2
4.2
1
– 20
20
250
350
2.4
1
7
0.4
10
– 10
600
600
10
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:
For receiver delay measurements, C
L
= 51pF. Trigger points
are set between the receiver’s input logic threshold and the output
transition to standard TTL/CMOS logic threshold (t
HL
= 1.3V to 2.4V
and t
LH
= 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.
5
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