LT1130A/LT1140A Series
Advanced Low Power
5V RS232 Drivers/Receivers
with Small Capacitors
DESCRIPTIO
FEATURES
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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-
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Uses Small Capacitors: 0.1m F, 0.2m F tions stipulated for RS232. Driver outputs and receiver
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1m A Supply Current in SHUTDOWN inputs can be shorted to 30V without damaging the
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120kBaud Operation for R = 3k, C = 2500pF device or the power supply generator. In addition, the
L L
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250kBaud Operation for R = 3k, C = 1000pF RS232 I/O pins are resilient to multiple 10kV ESD strikes.
L L
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CMOS Comparable Low Power An advanced driver output stage operates up to 250kbaud
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Easy PC Layout: Flowthrough Architecture while driving heavy capacitive loads. Supply current is
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Rugged Bipolar Design: Absolutely No Latchup typically 12mA, competitive with CMOS devices.
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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
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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
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Output Overvoltage Does Not Force Current Back
assume high impedance output states.
into Supplies
, LTC and LT are registered trademarks of Linear Technology Corporation.
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Available in SO and SSOP Packages
TYPICAL APPLICATIO
Basic Operation
Output Waveforms
+
1 28
V V
RECEIVER
2 27
0.1m F
0.1m F
OUTPUT
5V V 0.1m F
CC
3 LT1137A 26 = 50pF
C
2 L
0.1m F
4 25
DRIVER IN
2
5 24
DRIVER OUT RX OUT
6 23
DRIVER
RX IN DRIVER IN
R
OUTPUT
7 22
DRIVER OUT RX OUT
R = 3k
L
TO LOGIC
8 21
C = 2500pF
RX IN RX OUT L
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
1
U
ULT1130A/LT1140A Series
ABSOLUTEXAI U RATI GS (Note 1)
Short-Circuit Duration
Supply Voltage (V ) ................................................ 6V
CC
+
+
V ........................................................................ 13.2V V ................................................................... 30 sec
V ................................................................... 30 sec
V (Note 7) ....................................................... 13.2V
Input Voltage Driver Output .............................................. Indefinite
+
Receiver Output .......................................... Indefinite
Driver ........................................................... V to V
Receiver ............................................... 30V to 30V Operating Temperature Range
LT113XAC/LT114XAC ............................ 0 C to 70 C
On/Off Pin............................................. 0.3V to 12V
Driver Disable Pin ................... 0.3V to (V + 0.3V) LT113XAI/LT114XAI ............................. 40 to 85 C
CC
Storage Temperature Range ................ 65 C to 150 C
Output Voltage
Driver .................................................... 30V to 30V Lead Temperature (Soldering, 10 sec)................. 300 C
Receiver ................................. 0.3V to (V + 0.3V)
CC
U
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.
PACKAGE/ORDER I FOR ATIO
5-DRIVER/5-RECEIVER 5-DRIVER/4-RECEIVER WITH SHUTDOWN
ORDER PART ORDER PART
TOP VIEW TOP VIEW
NUMBER NUMBER
+
+
V 1 28 V V 1 28 V
5V V 2 LT1131A 27 C2
5V V 2 LT1130A 27 C2
CC CC
+ + + +
C1 3 26 C2
C1 3 26 C2
LT1131ACNW
LT1130ACNW
C1 4 25 DRIVER IN
C1 4 25 DRIVER IN
DRIVER OUT 5 24 RX OUT DRIVER OUT 5 24 RX OUT
LT1130ACSW LT1131ACSW
RX IN 6 23 DRIVER IN RX IN 6 23 DRIVER IN
LT1130AISW
DRIVER OUT 7 22 RX OUT
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 GND
DRIVER OUT 13 16 RX OUT
ON/OFF 14 15 DRIVER DISABLE
RX IN 14 15 GND
NW PACKAGE SW PACKAGE
NW PACKAGE SW PACKAGE
28-LEAD PDIP 28-LEAD PLASTIC SO WIDE
28-LEAD PDIP 28-LEAD PLASTIC SO WIDE
T = 150 C, q = 56 C/W (NW) T = 150 C, q = 56 C/W (NW)
JMAX JA
JMAX JA
T = 150 C, q = 68 C/W (SW) T = 150 C, q = 68 C/W (SW)
JMAX JA
JMAX JA
2
U WU
U W W W