LT1130A/LT1140A Series

Advanced Low Power

5V RS232 Drivers/Receivers
with Small Capacitors
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FEATURES DESCRIPTIO
■ ESD Protection over ±10kV The LT ®1130A/LT1140A series of RS232 drivers/receiv-
(±15kV IEC-1000-4-2 for LT1133A, LT1137A ers features special bipolar construction techniques which
and LT1141A) protect the drivers and receivers beyond the fault condi-
■ Uses Small Capacitors: 0.1µF, 0.2µF tions stipulated for RS232. Driver outputs and receiver
■ 1µA Supply Current in SHUTDOWN inputs can be shorted to ±30V without damaging the
■ 120kBaud Operation for RL = 3k, CL = 2500pF device or the power supply generator. In addition, the
■ 250kBaud Operation for RL = 3k, CL = 1000pF RS232 I/O pins are resilient to multiple ±10kV ESD strikes.
■ CMOS Comparable Low Power An advanced driver output stage operates up to 250kbaud
■ Easy PC Layout: Flowthrough Architecture while driving heavy capacitive loads. Supply current is
■ Rugged Bipolar Design: Absolutely No Latchup typically 12mA, competitive with CMOS devices.
■ Outputs Assume a High Impedance State When Off Several members of the series include flexible operating
or Powered Down mode controls. The DRIVER DISABLE pin disables the
■ Improved Protection: RS232 I/O Lines Can Be Forced drivers and the charge pump, the ON/OFF pin shuts down
to ±30V Without Damage all circuitry. While shut down, the drivers and receivers
■ Output Overvoltage Does Not Force Current Back assume high impedance output states.
into Supplies
, LTC and LT are registered trademarks of Linear Technology Corporation.
■ Available in SO and SSOP Packages

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TYPICAL APPLICATIO
Basic Operation Output Waveforms
V+ 1 28 V–
RECEIVER
0.1µF 2 27 0.1µF OUTPUT
5V VCC 0.1µF
3 LT1137A 26 ×2 CL = 50pF
0.1µF 4 25
×2 DRIVER IN
5 24
DRIVER OUT RX OUT
6 23 DRIVER
RX IN DRIVER IN ROUTPUT
7 22
DRIVER OUT RX OUT RL = 3k
8 21 TO LOGIC
RX IN RX OUT CL = 2500pF
TO LINE 9 20
RX IN RX OUT
10 19
RX IN DRIVER IN
11 18
DRIVER OUT RX OUT INPUT
12 17
RX IN GND
13 16
ON/OFF = 5V DRIVER DISABLE
14 15
LT1130A • TA02
1130A • TA01

LT1130A 5-Driver/5-Receiver RS232 Transceiver LT1136A 4-Driver/5-Receiver RS232 Transceiver w/Shutdown

LT1131A 5-Driver/4-Receiver RS232 Transceiver w/Shutdown LT1137A 3-Driver/5-Receiver RS232 Transceiver w/Shutdown
LT1132A 5-Driver/3-Receiver RS232 Transceiver LT1138A 5-Driver/3-Receiver RS232 Transceiver w/Shutdown
LT1133A 3-Driver/5-Receiver RS232 Transceiver LT1139A 4-Driver/4-Receiver RS232 Transceiver w/Shutdown
LT1134A 4-Driver/4-Receiver RS232 Transceiver LT1140A 5-Driver/3-Receiver RS232 Transceiver w/o Charge Pump
LT1135A 5-Driver/3-Receiver RS232 Transceiver w/o Charge Pump LT1141A 3-Driver/5-Receiver RS232 Transceiver w/o Charge Pump

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LT1130A/LT1140A Series
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ABSOLUTE AXI U RATI GS (Note 1)

Supply Voltage (VCC) ................................................ 6V Short-Circuit Duration

V + ........................................................................ 13.2V V + ................................................................... 30 sec
V – (Note 7) ....................................................... –13.2V V – ................................................................... 30 sec
Input Voltage Driver Output .............................................. Indefinite
Driver ........................................................... V – to V + Receiver Output .......................................... Indefinite
Receiver ............................................... – 30V to 30V Operating Temperature Range
On/Off Pin ............................................. – 0.3V to 12V LT113XAC/LT114XAC ............................ 0°C to 70°C
Driver Disable Pin ................... – 0.3V to (VCC + 0.3V) LT113XAI/LT114XAI ............................. – 40° to 85°C
Output Voltage Storage Temperature Range ................ – 65°C to 150°C
Driver .................................................... – 30V to 30V Lead Temperature (Soldering, 10 sec)................. 300°C
Receiver ................................. – 0.3V to (VCC + 0.3V)
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PRODUCT SELECTIO TABLE
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.
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PACKAGE/ORDER I FOR ATIO
5-DRIVER/5-RECEIVER 5-DRIVER/4-RECEIVER WITH SHUTDOWN
ORDER PART ORDER PART
TOP VIEW TOP VIEW
NUMBER V+ 28 V –
NUMBER
V+ 1 28 V – 1
5V VCC 2 LT1130A 27 C2 – 5V VCC 2 LT1131A 27 C2 –
C1+ 26 C2 + C1+ 26 C2 +
C1–
3
4 25 DRIVER IN
LT1130ACNW C1–
3
4 25 DRIVER IN
LT1131ACNW
DRIVER OUT 5 24 RX OUT LT1130ACSW DRIVER OUT 5 24 RX OUT LT1131ACSW
RX IN 6 23 DRIVER IN RX IN 6 23 DRIVER IN
DRIVER OUT 7 22 RX OUT
LT1130AISW DRIVER OUT 7 22 RX OUT
RX IN 8 21 DRIVER IN RX IN 8 21 DRIVER IN
DRIVER OUT 9 20 RX OUT DRIVER OUT 9 20 RX OUT
RX IN 10 19 DRIVER IN RX IN 10 19 DRIVER IN
DRIVER OUT 11 18 RX OUT DRIVER OUT 11 18 RX OUT
RX IN 12 17 DRIVER IN RX IN 12 17 DRIVER IN
DRIVER OUT 13 16 RX OUT DRIVER OUT 13 16 GND
RX IN 14 15 GND ON/OFF 14 15 DRIVER DISABLE

NW PACKAGE SW PACKAGE NW PACKAGE SW PACKAGE

28-LEAD PDIP 28-LEAD PLASTIC SO WIDE 28-LEAD PDIP 28-LEAD PLASTIC SO WIDE

TJMAX = 150°C, θJA = 56°C/W (NW) TJMAX = 150°C, θJA = 56°C/W (NW)
TJMAX = 150°C, θJA = 68°C/W (SW) TJMAX = 150°C, θJA = 68°C/W (SW)

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 LT1130A/LT1140A Series
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PACKAGE/ORDER I FOR ATIO
5-DRIVER/3-RECEIVER ORDER PART 3-DRIVER/5-RECEIVER ORDER PART
NUMBER NUMBER
TOP VIEW TOP VIEW

V+ 1 24 V – V+ 1 24 V –
5V VCC 2 LT1132A 23 C2 – LT1132ACN 5V VCC 2 LT1133A 23 C2 – LT1133ACN
C1+ 22 C2 + C1+ 22 C2 +
C1–
3
4 21 DRIVER IN
LT1132ACSW C1–
3
4 21 DRIVER IN
LT1133ACSW
DRIVER OUT 5 20 DRIVER IN LT1132AISW DRIVER OUT 5 20 RX OUT LT1133AISW
DRIVER OUT 6 19 RX OUT RX IN 6 19 DRIVER IN
RX IN 7 18 DRIVER IN DRIVER OUT 7 18 RX OUT
DRIVER OUT 8 17 DRIVER IN RX IN 8 17 RX OUT
DRIVER OUT 9 16 RX OUT RX IN 9 16 RX OUT
RX IN 10 15 DRIVER IN RX IN 10 15 DRIVER IN
DRIVER OUT 11 14 RX OUT DRIVER OUT 11 14 RX OUT
RX IN 12 13 GND RX IN 12 13 GND

N PACKAGE SW PACKAGE N PACKAGE SW PACKAGE

24-LEAD PDIP 24-LEAD PLASTIC SO WIDE 24-LEAD PDIP 24-LEAD PLASTIC SO WIDE

TJMAX = 150°C, θJA = 58°C/W (N) TJMAX = 150°C, θJA = 58°C/W (N)
TJMAX = 150°C, θJA = 80°C/W (SW) TJMAX = 150°C, θJA = 80°C/W (SW)

4-DRIVER/4-RECEIVER ORDER PART 5-DRIVER/3-RECEIVER ORDER PART

NUMBER WITHOUT CHARGE PUMP NUMBER
TOP VIEW

V+ 1 24 V – TOP VIEW
5V VCC 2 LT1134A 23 C2 – LT1134ACN LT1135ACN
12V V + 1 20 –12V V –
C1+ 22 C2 + LT1135A
C1–
3
4 21 DRIVER IN
LT1134ACSW 5V VCC 2 19 DRIVER IN LT1135ACSW
DRIVER OUT 5 20 RX OUT LT1134AIN DRIVER OUT
DRIVER OUT
3
4
18 DRIVER IN
17 RX OUT
RX IN 6 19 DRIVER IN
DRIVER OUT 7 18 RX OUT LT1134AISW RX IN 5 16 DRIVER IN

RX IN 8 17 DRIVER IN DRIVER OUT 6 15 DRIVER IN

DRIVER OUT 9 16 RX OUT DRIVER OUT 7 14 RX OUT

RX IN 10 15 DRIVER IN RX IN 8 13 DRIVER IN

DRIVER OUT 11 14 RX OUT DRIVER OUT 9 12 RX OUT

RX IN 12 13 GND RX IN 10 11 GND

N PACKAGE SW PACKAGE N PACKAGE SW PACKAGE

24-LEAD PDIP 24-LEAD PLASTIC SO WIDE 20-LEAD PDIP 20-LEAD PLASTIC SO WIDE

TJMAX = 150°C, θJA = 58°C/W (N) TJMAX = 150°C, θJA = 79°C/W (N)
TJMAX = 150°C, θJA = 80°C/W (SW) TJMAX = 150°C, θJA = 85°C/W (SW)

4-DRIVER/5-RECEIVER WITH SHUTDOWN ORDER PART 3-DRIVER/5-RECEIVER WITH SHUTDOWN ORDER PART
TOP VIEW
TOP VIEW NUMBER NUMBER
V+ 1 28 V –
V+ 1 28 V –
– 5V VCC 2 LT1137A 27 C2 –
5V VCC 2 LT1136A 27 C2
C1+ 3 26 C2 + LT1136ACNW C1+ 3 26 C2 + LT1137ACG
C1– 4 25 DRIVER IN
C1–
DRIVER OUT
4
5
25 DRIVER IN
24 RX OUT
LT1136ACSW DRIVER OUT 5 24 RX OUT LT1137ACNW
RX IN 6 23 DRIVER IN
RX IN
DRIVER OUT
6
7
23 DRIVER IN
22 RX OUT
LT1137ACSW
DRIVER OUT 7 22 RX OUT
RX IN 8 21 DRIVER IN
RX IN 8 21 RX OUT LT1137AIG
RX IN 9 20 RX OUT
DRIVER OUT 9 20 RX OUT
RX IN 10 19 DRIVER IN
LT1137AINW
RX IN 10 19 DRIVER IN
DRIVER OUT 11 18 RX OUT
DRIVER OUT 11 18 RX OUT LT1137AISW
RX IN 12 17 GND
RX IN 12 17 RX OUT
ON/OFF 13 16 DRIVER DISABLE
RX IN 13 16 GND
NC 14 15 NC
ON/OFF 14 15 DRIVER DISABLE
G PACKAGE NW PACKAGE SW PACKAGE
NW PACKAGE SW PACKAGE
28-LEAD PLASTIC SSOP 28-LEAD PDIP 28-LEAD PLASTIC SO WIDE
28-LEAD PDIP 28-LEAD PLASTIC SO WIDE

TJMAX = 150°C, θJA = 56°C/W (NW) TJMAX = 150°C, θJA = 96°C/W (G)
TJMAX = 150°C, θJA = 68°C/W (SW) TJMAX = 150°C, θJA = 56°C/W (NW)
TJMAX = 150°C, θJA = 68°C/W (SW)

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LT1130A/LT1140A Series
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PACKAGE/ORDER I FOR ATIO
5-DRIVER/3-RECEIVER WITH SHUTDOWN 4-DRIVER/4-RECEIVER WITH SHUTDOWN
TOP VIEW
ORDER PART ORDER PART
WITH 12V AND 5V SUPPLIES
V+ 1 28 V – NUMBER TOP VIEW
NUMBER
5V VCC 2 LT1138A 27 C2 –
C1+ 3 26 C2 + N.C. 1 24 V –

C1– 4 25 DRIVER IN LT1138ACG 5V VCC 2 LT1139A 23 C – LT1139ACN

12V INPUT 3 22 C +
DRIVER OUT 5 24 DRIVER IN LT1138ACNW DRIVER OUT 4 21 DRIVER IN
LT1139ACSW
DRIVER OUT 6 23 RX OUT
RX IN 7 22 DRIVER IN LT1138ACSW RX IN 5 20 RX OUT
DRIVER OUT 6 19 DRIVER IN
DRIVER OUT 8 21 RX OUT
LT1138AIG RX IN 7 18 RX OUT
RX IN 9 20 DRIVER IN
DRIVER OUT 10 19 RX OUT DRIVER OUT 8 17 DRIVER IN
RX IN 11 18 DRIVER IN RX IN 9 16 RX OUT
DRIVER OUT 12 17 GND DRIVER OUT 10 15 DRIVER IN
ON/OFF 13 16 DRIVER DISABLE RX IN 11 14 RX OUT
NC 14 15 NC ON/OFF 12 13 GND

G PACKAGE NW PACKAGE SW PACKAGE N PACKAGE SW PACKAGE

28-LEAD PLASTIC SSOP 28-LEAD PDIP 28-LEAD PLASTIC SO WIDE 24-LEAD PDIP 24-LEAD PLASTIC SO WIDE

TJMAX = 150°C, θJA = 96°C/W (G)

TJMAX = 150°C, θJA = 56°C/W (NW) TJMAX = 150°C, θJA = 58°C/W (N)
TJMAX = 150°C, θJA = 68°C/W (SW) TJMAX = 150°C, θJA = 80°C/W (SW)

5-DRIVER/3-RECEIVER WITH SHUTDOWN 3-DRIVER/5-RECEIVER WITH SHUTDOWN

WITHOUT CHARGE PUMP ORDER PART WITHOUT CHARGE PUMP ORDER PART
TOP VIEW NUMBER TOP VIEW NUMBER
12V V + 1 24 –12V V – 12V V + 1 24 –12V V –
5V VCC 2 LT1140A 23 N.C. 5V VCC 2 LT1141A 23 N.C.
N.C. 3 22 DRIVER IN LT1140ACN N.C. 3 22 RX OUT LT1141ACN
DRIVER OUT 4 21 DRIVER IN RX IN 4 21 DRIVER IN
DRIVER OUT 5 20 RX OUT
LT1140ACSW DRIVER OUT 5 20 RX OUT
LT1141ACSW
RX IN 6 19 DRIVER IN RX IN 6 19 DRIVER IN
DRIVER OUT 7 18 DRIVER IN DRIVER OUT 7 18 RX OUT
DRIVER OUT 8 17 RX OUT RX IN 8 17 DRIVER IN
RX IN 9 16 DRIVER IN DRIVER OUT 9 16 RX OUT
DRIVER OUT 10 15 RX OUT RX IN 10 15 RX OUT
RX IN 11 14 GND RX IN 11 14 GND
ON/OFF 12 13 DRIVER DISABLE ON/OFF 12 13 DRIVER DISABLE

N PACKAGE SW PACKAGE N PACKAGE SW PACKAGE

24-LEAD PDIP 24-LEAD PLASTIC SO WIDE 24-LEAD PDIP 24-LEAD PLASTIC SO WIDE

TJMAX = 150°C, θJA = 58°C/W (N) TJMAX = 150°C, θJA = 58°C/W (N)
TJMAX = 150°C, θJA = 80°C/W (SW) TJMAX = 150°C, θJA = 80°C/W (SW)

Consult factory for Industrial and Military grade parts.

ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
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 VCC Supply Current: LT1130A, LT1131A, LT1132A, (Note 3) ● 15 25 mA
LT1133A, LT1134A, LT1136A, LT1138A
5V VCC Supply Current: LT1135A, LT1140A, LT1141A (Note 3), V + = 12V, V – = –12V ● 8 15 mA
5V VCC Supply Current: LT1137A (Note 3) ● 12 17 mA
5V VCC Supply Current: LT1139A (Note 3), V + = 12V ● 8 15 mA
12V V + Supply Current: LT1135A, LT1140A, LT1141A (Note 3), V – = – 12V ● 1 4 mA
12V V + Supply Current: LT1139A (Note 3) ● 6 10 mA
– 12V V – Supply Current: LT1135A, LT1140A, LT1141A (Note 3) V + = 12V ● 2 6 mA

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 LT1130A/LT1140A Series
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Supply Current when OFF (VCC) Shutdown (Note 4) ● 1 10 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 ≤ VON/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 ≤ VDRIVER 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 (VOUT = High) ● 1.4 0.8 V
Input High Level (VOUT = Low) ● 2 1.4 V
Logic Input Current 0.8V ≤ VIN ≤ 2V ● 5 20 µA
Output Short-Circuit Current VOUT = 0V ±9 ±17 mA
Output Leakage Current Shutdown VOUT = ±30V (Note 4) ● 10 100 µA
Data Rate RL = 3k, CL = 2500pF 120 kbaud
RL = 3k, CL = 1000pF 250 kbaud
Slew Rate RL = 3k, CL = 51pF 15 30 V/µs
RL = 3k, CL = 2500pF (Note 8) 6 V/µs
Propagation Delay Output Transition tHL High to Low (Note 5) 0.6 1.3 µs
Output Transition tLH Low to High 0.5 1.3 µs
Any Receiver
Input Voltage Thresholds Input Low Threshold (VOUT = High) ● 0.8 1.3 V
Input High Threshold (VOUT = Low) ● 1.7 2.4 V
Hysteresis ● 0.1 0.4 1 V
Input Resistance – 10V < VIN < 10V 3 5 7 kΩ
Output Voltage Output Low, IOUT = – 1.6mA ● 0.2 0.4 V
Output High, IOUT = 160µA (VCC = 5V) ● 3.5 4.2 V
Output Leakage Current Shutdown (Note 4) 0 ≤ VOUT ≤ VCC ● 1 10 µA
Output Short-Circuit Current Sinking Current, VOUT = VCC – 20 – 10 mA
Sourcing Current, VOUT = 0V 10 20 mA
Propagation Delay Output Transition tHL High to Low (Note 6) 250 600 ns
Output Transition tLH Low to High 350 600 ns
Note 1: Absolute Maximum Ratings are those values beyond which the life Note 5: For driver delay measurements, RL = 3k and CL = 51pF. Trigger
of the device may be impaired. points are set between the driver’s input logic threshold and the output
Note 2: Testing done at VCC = 5V and VON/OFF = 3V. transition to the zero crossing (tHL = 1.4V to 0V and tLH = 1.4V to 0V).
Note 3: Supply current is measured with driver and receiver outputs Note 6: For receiver delay measurements, CL = 51pF. Trigger points
unloaded and the driver inputs tied high. are set between the receiver’s input logic threshold and the output
Note 4: Supply current and driver leakage current measurements in shut- transition to standard TTL/CMOS logic threshold (tHL = 1.3V to 2.4V
down are performed with VON/OFF = 0.1V. Supply current measurements and tLH = 1.7V to 0.8V).
using DRIVER DISABLE are performed with VDRIVER DISABLE = 3V. For Note 7: For LT1133A/LT1137A, absolute maximum externally applied
LT1135, LT1139, LT1140 and LT1141 with 12V supplies, VOUT leakage is V – = – 6.5V. Internal charge pump will drive this pin to a higher nega-
200µA for VOUT forced to ±25V. tive voltage.
Note 8: For LT1137A, 4V/µs minimum.

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 LT1130A/LT1140A Series
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TYPICAL PERFOR A CE CHARACTERISTICS

Driver Output Voltage Receiver Input Thresholds Supply Current vs Data Rate
10 3.00 100
RL = 3k OUTPUT HIGH
8 2.75 90 5 DRIVER
RL = 3k
DRIVER OUTPUT VOLTAGE (V)

6 2.50 80 CL = 2500pF
VCC = 5.5V

THRESHOLD VOLTAGE (V)

SUPPLY CURRENT (mA)

4 VCC = 5V 2.25 70
VCC = 4.5V
2 2.00 60
INPUT HIGH
0 1.75 50
–2 VCC = 4.5V 1.50 40 3 DRIVER
VCC = 5V INPUT LOW
–4 VCC = 5.5V 1.25 RL = 3k
30 CL = 2500pF
–6 1.00 20
–8 OUTPUT LOW 0.75 10
–10 0.50 0
–55 –25 0 25 50 75 100 125 –55 –25 0 25 50 75 100 125 0 25 50 75 100 125 150
TEMPERATURE (°C) TEMPERATURE (°C) DATA RATE (kBaud)
LT1130A • TPC01 LT1137A • TPC02 LT1130A • TPC03

Supply Current in Shutdown Supply Current in Driver Disable Driver Disable Threshold
100 5 3.0

4 2.5

THRESHOLD VOLTAGE (V)

SUPPLY CURRENT (mA)
SUPPLY CURRENT (µA)

10 2.0
3

1.5
2
1 1.0

1
0.5

0.1 0 0
–55 –25 0 25 50 75 100 125 –55 –25 0 25 50 75 100 125 –55 –25 0 25 50 75 100 125
TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C)
LT1137A • TPC04 LT1137A • TPC05 LT1137A • TPC06

ON/OFF Thresholds Supply Current Driver Leakage in Shutdown

3.0 50 100
45
5 DRIVER
2.5 40
THRESHOLD VOLTAGE (V)

LEAKAGE CURRENT (µA)

SUPPLY CURRENT (mA)

35 3 DRIVER
2.0 10
ON THRESHOLD 30

1.5 25 1 DRIVER
20 VOUT = 30V
1.0 NO LOAD 1 VOUT = –30V
15
OFF THRESHOLD
10
0.5
5

0 0 0.1
–55 –25 0 25 50 75 100 125 –55 –25 0 25 50 75 100 125 –55 –25 0 25 50 75 100 125
TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C)
LT1137A • TPC07 LT1130A • TPC08 LT1137A • TPC09

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 LT1130A/LT1140A Series
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TYPICAL PERFOR A CE CHARACTERISTICS

Driver Short-Circuit Current Receiver Short-Circuit Current

30 50

SHORT-CIRCUIT CURRENT (mA)

SHORT-CIRCUIT CURRENT (mA)

25 40
ISC +
ISC –
20
30
ISC +
15
ISC – 20
10

10
5

0 0
–55 –25 0 25 50 75 100 125 –55 –25 0 25 50 75 100 125
TEMPERATURE (°C) TEMPERATURE (°C)
LT1137A • TPC10 LT1137A • TPC11

Shutdown to Driver Output Driver Output Waveforms

DRIVER 10 DRIVER OUTPUT

OUTPUT HIGH RL = 3k
RL = 3k 5
0
DRIVER OUTPUT
DRIVER – 5 RL = 3k
OUTPUT LOW CL = 2500pF
RL = 3k – 10

ON/OFF PIN INPUT

LT1137A • TPC12 LT1137A • TPC13

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PI FU CTIO S
VCC: 5V Input Supply Pin. Supply current drops to zero in in a high impedance state. Receivers remain active under
the shutdown mode. This pin should be decoupled with a these conditions. Floating the DRIVER DISABLE pin or
0.1µF ceramic capacitor close to the package pin. Insuffi- driving it to a logic low level fully enables the transceiver.
cient supply bypassing can result in low output drive levels A logic low on the ON/OFF pin supersedes the state of the
and erratic charge pump operation. DRIVER DISABLE pin. Supply current drops to 4mA when
in driver disable mode.
GND: Ground Pin.
V +: Positive Supply Output (RS232 Drivers). V + ≈ 2VCC –
ON/OFF: Control the operation mode of the device and is
1.5V. This pin requires an external charge storage capaci-
TTL/CMOS compatible. A logic low puts the device in the
tor C ≥ 1.0µF, tied to ground or VCC. Larger value capaci-
shutdown mode which reduces input supply curent to zero
tors may be used to reduce supply ripple. With multiple
and places all of the drivers and receivers in high imped-
transceivers, the V + and V – pins may be paralleled into
ance state. A logic high fully enables the transceiver.
common capacitors. For large numbers of transceivers,
DRIVER DISABLE: This pin provides an alternate control increasing the size of the shared common storage capaci-
for the charge pump and RS232 drivers. A logic high on tors is recommended to reduce ripple.
this pin shuts down the charge pump and places all drivers

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LT1130A/LT1140A Series
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PI FU CTIO S
V –: Negative Supply Output (RS232 Drivers). V – ≈ –(2VCC Slew rates are controlled for lightly loaded lines. Output
– 2.5V). This pin requires an external charge storage current capability is sufficient for load conditions up to
capacitor C ≥ 0.1µF. V – is short-circuit proof for 2500pF. Outputs are in a high impedance state when in
30 seconds. shutdown mode, VCC = 0V, or when the DRIVER DISABLE
pin is active. Outputs are fully short-circuit protected from
C1+, C1–, C2+, C2 –: Commutating Capacitor Inputs.
These pins require two external capacitors C ≥ 0.2µF: one V – + 30V to V + – 30V. Applying higher voltages will not
damage the device if the overdrive is moderately current
from C1+ to C1–, and another from C2 + to C2 –. To
maintain charge pump efficiency, the capacitor’s effective limited. Short circuits on one output can load the power
supply generator and may disrupt the signal levels of the
series resistance should be less than 2Ω. For C ≥ 1µF, low
other outputs. The driver outputs are protected against
ESR tantalum capacitors work well in this application,
although small value ceramic capacitors may be used ESD to ±10kV for human body model discharges.
with a minimal reduction in charge pump compliance. In RX IN: Receiver Inputs. These pins accept RS232 level
applications where larger positive voltages are available, signals (±30V) into a protected 5k terminating resistor.
such as 12V, C1 may be omitted and the positive voltage The receiver inputs are protected against ESD to ±10kV for
may be connected directly to the C1+ pin. In this mode of human body model discharges. Each receiver provides
operation, the V + pin should be decoupled with a 0.1µF 0.4V of hysteresis for noise immunity. Open receiver
ceramic capacitor. inputs assume a logic low state.
DRIVER IN: RS232 Driver Input Pins. These inputs are RX OUT: Receiver Outputs with TTL/CMOS Voltage Lev-
TTL/CMOS compatible. Inputs should not be allowed to els. Outputs are in a high impedance state when in shut-
float. Tie unused inputs to VCC. down mode to allow data line sharing. Outputs are fully
DRIVER OUT: Driver Outputs at RS232 Voltage Levels. short-circuit protected to ground or VCC with the power
on, off, or in shutdown mode.
Driver output swing meets RS232 levels for loads up to 3k.

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ESD PROTECTIO
The RS232 line inputs of the LT1130A/LT1140A series of ESD Test Circuit
RS232 Driver/Receivers have on-chip protection from
ESD transients up to ±10kV. The protection structures act V+ 1 28 V–
5V VCC 2 LT1137A
to divert the static discharge safely to system ground. In 27 0.1µF
3 26 + 0.2µF
order for the ESD protection to function effectively, the 0.1µF 0.1µF +
0.2µF 4 25
power supply and ground pins of the LT1130A/LT1140A 5 24
DRIVER 1 IN
DRIVER 1 OUT RX1 OUT
must be connected to ground through low impedances. 6 23
RX1 IN DRIVER 2 IN
The power supply decoupling capacitors and charge DRIVER 2 OUT
7 22
RX2 OUT
pump storage capacitors provide this low impedance in RS232
RX2 IN
8 21
RX3 OUT
LINE PINS
normal application of the circuit. The only constraint is PROTECTED RX3 IN
9 20
RX4 OUT
TO ±15kV 10 19
that low ESR capacitors must be used for bypassing and RX4 IN DRIVER 3 IN
11 18
charge storage. ESD testing must be done with pins VCC, DRIVER 3 OUT
12 17
RX5 OUT

V +, V – and GND shorted to ground or connected with low RX5 IN

13 16
GND
ON/OFF DRIVER DISABLE
ESR capacitors. 14 15

The ESD protection on the LT1133A, LT1137A and LT1130A • ESD TC

LT1141A meets ±15kV air gap discharge and ±8kV con-

tact methods per IEC-1000-4-2.

8
 LT1130A/LT1140A Series
U
TYPICAL APPLICATIO S
Operation Using 5V and 12V Power Supplies

V+ 1 28 V–
VCC LT1137A
2 27
5V VCC 0.1µF 0.1µF
C1+ 3 26 ×2
12V V +
4 25
0.01µF 0.01µF C1– DRIVER IN
5 24
DRIVER OUT RX OUT
6 23
RX IN DRIVER IN
7 22
DRIVER OUT RX OUT
8 21 TO LOGIC
RX IN RX OUT
TO LINE 9 20
RX IN RX OUT
10 19
RX IN DRIVER IN
11 18
DRIVER OUT RX OUT
12 17
RX IN GND
13 16
ON/0FF = 5V DRIVER DISABLE
14 15

LT1130A • TA03

Typical Mouse Driving Application

V+ 1 28 V–
LT1137A
0.1µF 5V VCC 2 27 0.1µF 0.1µF
MOUSE 3 26 ×2
0.1µF
×2 4 25 DRIVER 1 IN
LOGIC “0”
V+ 5 24 RX1 OUT
DRIVER 1 OUT
LOGIC DCD RX1 IN 6 23 DRIVER 2 IN
(1) LOGIC “0”
DSR DRIVER 2 OUT 7 22 RX2 OUT
RX RX2 IN 8 21 RX3 OUT
MOUSE DATA
RTS RX3 IN 9 20 RX4 OUT
OPTICS TX RX4 IN 10 19 DRIVER 3 IN
LOGIC “1”
V– CTS DRIVER 3 OUT 11 18 RX5 OUT
DTR RX5 IN 12 17 GND
RI ON/OFF 13 16 DRIVER DISABLE
(9)
(5) 14 15

DB9 LT1130A • TA04

9
LT1130A/LT1140A Series
U
PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted.
G Package
28-Lead Plastic SSOP (0.209)
(LTC DWG # 05-08-1640)
0.397 – 0.407*
0.205 – 0.212** (10.07 – 10.33)
(5.20 – 5.38) 0.068 – 0.078 28 27 26 25 24 23 22 21 20 19 18 17 16 15
(1.73 – 1.99)

0° – 8°

0.301 – 0.311
0.0256 (7.65 – 7.90)
0.005 – 0.009
0.022 – 0.037 (0.65)
(0.13 – 0.22)
(0.55 – 0.95) BSC 0.002 – 0.008
0.010 – 0.015 (0.05 – 0.21)
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH (0.25 – 0.38)
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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 G28 SSOP 0694

N Package
20-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
1.040*
(26.416)
0.300 – 0.325 0.130 ± 0.005 0.045 – 0.065 MAX
(7.620 – 8.255) (3.302 ± 0.127) (1.143 – 1.651)
20 19 18 17 16 15 14 13 12 11

0.020
(0.508) 0.255 ± 0.015*
MIN 0.065 (6.477 ± 0.381)
0.009 – 0.015 (1.651)
(0.229 – 0.381) TYP
+0.035 1 2 3 4 5 6 7 8 9 10
0.325 –0.015 0.005

( )
0.125 0.018 ± 0.003
+0.889 (0.127)
8.255 (3.175)
MIN (0.457 ± 0.076)
–0.381 MIN
0.100 ± 0.010
(2.540 ± 0.254) N20 1197

*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)

1.265*
(32.131)
0.300 – 0.325 0.130 ± 0.005 0.045 – 0.065 MAX
(7.620 – 8.255) (3.302 ± 0.127) (1.143 – 1.651) 24 23 22 21 20 19 18 17 16 15 14 13

0.020
(0.508) 0.255 ± 0.015*
MIN 0.065 (6.477 ± 0.381)
0.009 – 0.015 (1.651)
TYP
(0.229 – 0.381)
0.125 1 2 3 4 5 6 7 8 9 10 11 12
+0.035 0.018 ± 0.003
0.325 –0.015 (3.175)

( )
N24 1197
MIN 0.100 ± 0.010 (0.457 ± 0.076)
+0.889
8.255 (2.540 ± 0.254)
–0.381

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)

10
 LT1130A/LT1140A Series
U
PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted.

NW Package
28-Lead PDIP (Wide 0.600)
(LTC DWG # 05-08-1520)
0.070 1.455*
(1.778) (36.957)
0.600 – 0.625 0.150 ± 0.005 0.045 – 0.065 TYP MAX
(15.240 – 15.875) (3.810 ± 0.127) (1.143 – 1.651)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
0.015
(0.381)
MIN
0.009 – 0.015 0.505 – 0.560*
(0.229 – 0.381) (12.827 – 14.224)
+0.035
0.625 –0.015
0.125 0.018 ± 0.003

( )
0.035 – 0.080
+0.889 (3.175) (0.889 – 2.032) (0.457 ± 0.076)
15.87 1 2 3 4 5 6 7 8 9 10 11 12 13 14
–0.381 MIN 0.100 ± 0.010
N28 1197
(2.540 ± 0.254)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)

SW Package
20-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
0.291 – 0.299** 0.496 – 0.512*
(7.391 – 7.595) (12.598 – 13.005)
0.093 – 0.104 0.037 – 0.045
0.010 – 0.029 × 45° 20 19 18 17 16 15 14 13 12 11
(2.362 – 2.642) (0.940 – 1.143)
(0.254 – 0.737)

0° – 8° TYP

0.050 NOTE 1 0.394 – 0.419

0.009 – 0.013 (1.270) (10.007 – 10.643)
(0.229 – 0.330) NOTE 1 TYP 0.004 – 0.012
0.016 – 0.050 0.014 – 0.019 (0.102 – 0.305)
(0.406 – 1.270) (0.356 – 0.482)
TYP
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
1 2 3 4 5 6 7 8 9 10
*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 S20 (WIDE) 0396

SW Package
24-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)

0.291 – 0.299** 0.598 – 0.614*

(7.391 – 7.595) (15.190 – 15.600)

0.093 – 0.104 0.037 – 0.045

0.010 – 0.029 × 45° 24 23 22 21 20 19 18 17 16 15 14 13
(2.362 – 2.642) (0.940 – 1.143)
(0.254 – 0.737)

0° – 8° TYP

0.050 NOTE 1 0.394 – 0.419

0.009 – 0.013 (1.270) (10.007 – 10.643)
(0.229 – 0.330) NOTE 1 TYP
0.014 – 0.019
0.016 – 0.050
(0.356 – 0.482) 0.004 – 0.012
(0.406 – 1.270)
NOTE: TYP (0.102 – 0.305)
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 1 2 3 4 5 6 7 8 9 10 11 12
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE S24 (WIDE) 0996

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. 11
LT1130A/LT1140A Series
U
PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted.
SW Package
28-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)

0.291 – 0.299** 0.697 – 0.712*

(7.391 – 7.595) (17.70 – 18.08)
0.037 – 0.045
0.010 – 0.029 × 45° 0.093 – 0.104 (0.940 – 1.143) 28 27 26 25 24 23 22 21 20 19 18 17 16 15
(0.254 – 0.737) (2.362 – 2.642)

0° – 8° TYP

0.050 NOTE 1 0.394 – 0.419

(1.270) (10.007 – 10.643)
0.009 – 0.013
(0.229 – 0.330) TYP 0.014 – 0.019 0.004 – 0.012
NOTE 1 (0.356 – 0.482) (0.102 – 0.305)
0.016 – 0.050 TYP
(0.406 – 1.270)
NOTE:
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 S28 (WIDE) 0996
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

U
TYPICAL APPLICATION
Sharing Power Supply Generator with a Second Transceiver

1µF
+
V+ 1 24 V– V+ 1 24 V–
LT1133A LT1141A
+ 5V VCC 2 23 C2 – 2 23
5V VCC NC
1µF + C1+ 3 22 C2 + 1µF 3 22
+ NC RX OUT
1µF C1– 4 21 4 21
DRIVER IN RX IN DRIVER IN
5 20 5 20
DRIVER OUT RX OUT DRIVER OUT RX OUT
6 19 6 19
RX IN DRIVER IN RX IN DRIVER IN
7 18 7 18 TO
DRIVER OUT RX OUT TO DRIVER OUT RX OUT LOGIC
TO RS232
TO 8 17 LOGIC 8 17
RX IN RX OUT LINE RX IN DRIVER IN
RS232 9 16 9 16
LINE RX IN RX OUT DRIVER OUT RX OUT
10 15 10 15
RX IN DRIVER IN RX IN RX OUT
11 14 11 14 GND
DRIVER OUT RX OUT RX IN
12 13 12 13
RX IN GND ON/OFF DRIVER
DISABLE

LT1130A • TA05

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

1130asfb LT/TP 0799 2K REV B • PRINTED IN USA

Linear Technology Corporation
12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 ● (408) 432-1900
FAX: (408) 434-0507● TELEX: 499-3977 ● www.linear-tech.com  LINEAR TECHNOLOGY CORPORATION 1993