LT1130A/LT1140A Series
Advanced Low Power
5V RS232 Drivers/Receivers
with Small Capacitors
U
DESCRIPTIO
FEATURES
■
■
■
■
■
■
■
■
■
■
■
■
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 RL = 3k, CL = 2500pF
250kBaud Operation for RL = 3k, CL = 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/receivers features special bipolar construction techniques which
protect the drivers and receivers beyond the fault conditions 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.
U
TYPICAL APPLICATIO
Basic Operation
0.1µF
V+ 1
28
2
27
5V VCC
0.1µF
×2
DRIVER OUT
RX IN
DRIVER OUT
TO LINE
RX IN
RX IN
RX IN
DRIVER OUT
RX IN
ON/OFF = 5V
3
LT1137A
Output Waveforms
V–
0.1µF
×2
26
4
25
5
24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
0.1µF
RECEIVER
OUTPUT
CL = 50pF
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
TO LOGIC
DRIVER
ROUTPUT
RL = 3k
CL = 2500pF
RX OUT
DRIVER IN
RX OUT
INPUT
GND
DRIVER DISABLE
LT1130A • TA02
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
1
LT1130A/LT1140A Series
W W
W
AXI U
U
ABSOLUTE
RATI GS
(Note 1)
Supply Voltage (VCC) ................................................ 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 (VCC + 0.3V)
Output Voltage
Driver .................................................... – 30V to 30V
Receiver ................................. – 0.3V to (VCC + 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
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.
U
W
U
PACKAGE/ORDER I FOR ATIO
5-DRIVER/5-RECEIVER
TOP VIEW
5-DRIVER/4-RECEIVER WITH SHUTDOWN
TOP VIEW
V+
1
27 C2 –
5V VCC
2
3
26 C2 +
C1+
3
26 C2 +
C1–
4
25 DRIVER IN
C1–
4
25 DRIVER IN
DRIVER OUT
5
24 RX OUT
DRIVER OUT
5
24 RX OUT
V+
1
5V VCC
2
C1+
28 V –
LT1130A
RX IN
6
23 DRIVER IN
DRIVER OUT
7
22 RX OUT
RX IN
8
21 DRIVER IN
DRIVER OUT
9
20 RX OUT
RX IN 10
DRIVER OUT 11
RX IN 12
DRIVER OUT 13
RX IN 14
NW PACKAGE
28-LEAD PDIP
19 DRIVER IN
18 RX OUT
17 DRIVER IN
16 RX OUT
15 GND
SW PACKAGE
28-LEAD PLASTIC SO WIDE
TJMAX = 150°C, θJA = 56°C/W (NW)
TJMAX = 150°C, θJA = 68°C/W (SW)
2
ORDER PART
NUMBER
LT1130ACNW
LT1130ACSW
LT1130AISW
28 V –
LT1131A
27 C2 –
RX IN
6
23 DRIVER IN
DRIVER OUT
7
22 RX OUT
RX IN
8
21 DRIVER IN
DRIVER OUT
9
20 RX OUT
RX IN 10
DRIVER OUT 11
RX IN 12
DRIVER OUT 13
ON/OFF 14
NW PACKAGE
28-LEAD PDIP
ORDER PART
NUMBER
19 DRIVER IN
18 RX OUT
17 DRIVER IN
16 GND
15 DRIVER DISABLE
SW PACKAGE
28-LEAD PLASTIC SO WIDE
TJMAX = 150°C, θJA = 56°C/W (NW)
TJMAX = 150°C, θJA = 68°C/W (SW)
LT1131ACNW
LT1131ACSW
LT1130A/LT1140A Series
U
W
U
PACKAGE/ORDER I FOR ATIO
5-DRIVER/3-RECEIVER
TOP VIEW
1
5V VCC
2
C1+
3
22 C2 +
24 V –
23 C2 –
C1–
4
21 DRIVER IN
DRIVER OUT
5
20 DRIVER IN
DRIVER OUT
6
19 RX OUT
RX IN
7
DRIVER OUT
DRIVER OUT
LT1132ACN
LT1132ACSW
LT1132AISW
1
5V VCC
2
C1+
3
22 C2 +
24 V –
LT1133A
23 C2 –
C1–
4
21 DRIVER IN
5
20 RX OUT
RX IN
6
19 DRIVER IN
18 DRIVER IN
DRIVER OUT
7
18 RX OUT
8
17 DRIVER IN
RX IN
8
17 RX OUT
9
16 RX OUT
RX IN
9
16 RX OUT
15 DRIVER IN
RX IN 10
14 RX OUT
DRIVER OUT 11
N PACKAGE
24-LEAD PDIP
TOP VIEW
V+
1
5V VCC
2
C1+
3
22 C2 +
24 V –
23 C2 –
TJMAX = 150°C, θJA = 58°C/W (N)
TJMAX = 150°C, θJA = 80°C/W (SW)
ORDER PART
NUMBER
LT1134ACN
LT1134ACSW
LT1134AIN
LT1134AISW
18 DRIVER IN
4
17 RX OUT
RX IN
5
16 DRIVER IN
17 DRIVER IN
DRIVER OUT
6
15 DRIVER IN
16 RX OUT
DRIVER OUT
7
14 RX OUT
RX IN
8
13 DRIVER IN
DRIVER OUT
9
12 RX OUT
19 DRIVER IN
DRIVER OUT
7
18 RX OUT
RX IN
8
DRIVER OUT
9
15 DRIVER IN
14 RX OUT
N PACKAGE
20-LEAD PDIP
SW PACKAGE
24-LEAD PLASTIC SO WIDE
TOP VIEW
27 C2
–
3
26 C2 +
C1–
4
25 DRIVER IN
DRIVER OUT
5
24 RX OUT
RX IN
6
23 DRIVER IN
DRIVER OUT
7
22 RX OUT
RX IN
8
21 DRIVER IN
DRIVER OUT
9
20 RX OUT
RX IN 10
19 DRIVER IN
DRIVER OUT 11
18 RX OUT
RX IN 12
17 RX OUT
RX IN 13
16 GND
ON/OFF 14
NW PACKAGE
28-LEAD PDIP
ORDER PART
NUMBER
28 V –
C1+
15 DRIVER DISABLE
SW PACKAGE
28-LEAD PLASTIC SO WIDE
TJMAX = 150°C, θJA = 56°C/W (NW)
TJMAX = 150°C, θJA = 68°C/W (SW)
LT1135ACN
LT1135ACSW
SW PACKAGE
20-LEAD PLASTIC SO WIDE
TJMAX = 150°C, θJA = 79°C/W (N)
TJMAX = 150°C, θJA = 85°C/W (SW)
TJMAX = 150°C, θJA = 58°C/W (N)
TJMAX = 150°C, θJA = 80°C/W (SW)
4-DRIVER/5-RECEIVER WITH SHUTDOWN
ORDER PART
NUMBER
11 GND
RX IN 10
13 GND
LT1136A
20 –12V V –
DRIVER OUT
6
2
LT1135A
19 DRIVER IN
RX IN
1
1
3
20 RX OUT
N PACKAGE
24-LEAD PDIP
TOP VIEW
12V V +
2
21 DRIVER IN
5
RX IN 12
5-DRIVER/3-RECEIVER
WITHOUT CHARGE PUMP
5V VCC
4
DRIVER OUT 11
SW PACKAGE
24-LEAD PLASTIC SO WIDE
DRIVER OUT
C1–
DRIVER OUT
RX IN 10
13 GND
N PACKAGE
24-LEAD PDIP
TJMAX = 150°C, θJA = 58°C/W (N)
TJMAX = 150°C, θJA = 80°C/W (SW)
4-DRIVER/4-RECEIVER
LT1133ACN
LT1133ACSW
LT1133AISW
14 RX OUT
RX IN 12
SW PACKAGE
24-LEAD PLASTIC SO WIDE
LT1134A
ORDER PART
NUMBER
15 DRIVER IN
DRIVER OUT 11
13 GND
RX IN 12
5V VCC
V+
DRIVER OUT
RX IN 10
V+
3-DRIVER/5-RECEIVER
TOP VIEW
V+
LT1132A
ORDER PART
NUMBER
LT1136ACNW
LT1136ACSW
3-DRIVER/5-RECEIVER WITH SHUTDOWN
TOP VIEW
V+
1
5V VCC
2
C1+
3
26 C2 +
C1–
4
25 DRIVER IN
DRIVER OUT
5
24 RX OUT
RX IN
6
23 DRIVER IN
DRIVER OUT
7
22 RX OUT
RX IN
8
21 RX OUT
RX IN
9
20 RX OUT
28 V –
LT1137A
RX IN 10
18 RX OUT
RX IN 12
LT1137ACG
LT1137ACNW
LT1137ACSW
LT1137AIG
LT1137AINW
LT1137AISW
17 GND
ON/OFF 13
16 DRIVER DISABLE
NC 14
G PACKAGE
28-LEAD PLASTIC SSOP
27 C2 –
19 DRIVER IN
DRIVER OUT 11
ORDER PART
NUMBER
15 NC
NW PACKAGE
28-LEAD PDIP
SW PACKAGE
28-LEAD PLASTIC SO WIDE
TJMAX = 150°C, θJA = 96°C/W (G)
TJMAX = 150°C, θJA = 56°C/W (NW)
TJMAX = 150°C, θJA = 68°C/W (SW)
3
LT1130A/LT1140A Series
W
U
U
PACKAGE/ORDER I FOR ATIO
5-DRIVER/3-RECEIVER WITH SHUTDOWN
TOP VIEW
V+
1
5V VCC
2
C1+
3
26 C2 +
C1–
4
25 DRIVER IN
28 V –
LT1138A
5
24 DRIVER IN
DRIVER OUT
6
23 RX OUT
RX IN
7
22 DRIVER IN
DRIVER OUT
8
21 RX OUT
RX IN
9
20 DRIVER IN
TOP VIEW
LT1138ACG
LT1138ACNW
LT1138ACSW
LT1138AIG
19 RX OUT
RX IN 11
18 DRIVER IN
DRIVER OUT 12
TJMAX = 150°C, θJA = 96°C/W (G)
TJMAX = 150°C, θJA = 56°C/W (NW)
TJMAX = 150°C, θJA = 68°C/W (SW)
TOP VIEW
12V V +
1
5V VCC
2
N.C.
3
22 DRIVER IN
DRIVER OUT
4
21 DRIVER IN
DRIVER OUT
5
20 RX OUT
RX IN
6
19 DRIVER IN
DRIVER OUT
7
18 DRIVER IN
DRIVER OUT
8
17 RX OUT
RX IN
9
16 DRIVER IN
LT1140A
DRIVER OUT 10
RX IN 11
ON/OFF 12
N PACKAGE
24-LEAD PDIP
2
12V INPUT
3
22 C +
DRIVER OUT
4
21 DRIVER IN
RX IN
5
20 RX OUT
DRIVER OUT
6
19 DRIVER IN
RX IN
7
18 RX OUT
DRIVER OUT
8
17 DRIVER IN
RX IN
9
16 RX OUT
ORDER PART
NUMBER
LT1139ACN
LT1139ACSW
23 C –
LT1139A
15 DRIVER IN
14 RX OUT
13 GND
N PACKAGE
24-LEAD PDIP
SW PACKAGE
28-LEAD PLASTIC SO WIDE
5-DRIVER/3-RECEIVER WITH SHUTDOWN
WITHOUT CHARGE PUMP
5V VCC
ON/OFF 12
15 NC
NW PACKAGE
28-LEAD PDIP
1
RX IN 11
16 DRIVER DISABLE
NC 14
24 V –
N.C.
DRIVER OUT 10
17 GND
ON/OFF 13
G PACKAGE
28-LEAD PLASTIC SSOP
4-DRIVER/4-RECEIVER WITH SHUTDOWN
WITH 12V AND 5V SUPPLIES
27 C2 –
DRIVER OUT
DRIVER OUT 10
ORDER PART
NUMBER
SW PACKAGE
24-LEAD PLASTIC SO WIDE
TJMAX = 150°C, θJA = 58°C/W (N)
TJMAX = 150°C, θJA = 80°C/W (SW)
ORDER PART
NUMBER
3-DRIVER/5-RECEIVER WITH SHUTDOWN
WITHOUT CHARGE PUMP
TOP VIEW
24 –12V V –
12V V +
1
23 N.C.
5V VCC
2
N.C.
3
22 RX OUT
RX IN
4
21 DRIVER IN
DRIVER OUT
5
20 RX OUT
RX IN
6
19 DRIVER IN
DRIVER OUT
7
18 RX OUT
RX IN
8
17 DRIVER IN
DRIVER OUT
9
16 RX OUT
15 RX OUT
RX IN 10
15 RX OUT
14 GND
RX IN 11
14 GND
LT1140ACN
LT1140ACSW
13 DRIVER DISABLE
ON/OFF 12
SW PACKAGE
24-LEAD PLASTIC SO WIDE
N PACKAGE
24-LEAD PDIP
ORDER PART
NUMBER
24 –12V V –
LT1141A
23 N.C.
LT1141ACN
LT1141ACSW
13 DRIVER DISABLE
SW PACKAGE
24-LEAD PLASTIC SO WIDE
TJMAX = 150°C, θJA = 58°C/W (N)
TJMAX = 150°C, θJA = 80°C/W (SW)
TJMAX = 150°C, θJA = 58°C/W (N)
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–
– 7.8
V
Output
5V VCC Supply Current: LT1130A, LT1131A, LT1132A,
LT1133A, LT1134A, LT1136A, LT1138A
(Note 3)
●
15
25
mA
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 +
●
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
4
= 12V
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
Supply Current when OFF (VCC)
Shutdown (Note 4)
Driver Disable
Supply Rise Time
Shutdown to Turn-On
C1, C2, C +, C – = 1.0µF
C +, C – = 0.1µF, C1, C2 = 0.2µF
ON/OFF Pin Thresholds
Input Low Level (Device Shut Down)
Input High Level (Device Enabled)
●
●
2.4
ON/OFF Pin Current
0V ≤ VON/OFF ≤ 5V
●
– 15
DRIVER DISABLE Pin Thresholds
Input Low Level (Drivers Enabled)
Input High Level (Drivers Disabled)
●
●
2.4
0V ≤ VDRIVER DISABLE ≤ 5V
●
– 10
DRIVER DISABLE Pin Current
MIN
●
TYP
MAX
1
4
10
2.0
0.2
Oscillator Frequency
1.4
1.4
1.4
1.4
UNITS
µA
mA
ms
ms
0.8
V
V
80
µA
0.8
V
V
500
130
µA
kHz
Any Driver
Output Voltage Swing
Load = 3k to GND Positive
Negative
●
●
Input Low Level (VOUT = High)
Input High Level (VOUT = Low)
●
●
Logic Input Current
0.8V ≤ VIN ≤ 2V
●
Output Short-Circuit Current
VOUT = 0V
Output Leakage Current
Shutdown VOUT = ±30V (Note 4)
Data Rate
RL = 3k, CL = 2500pF
RL = 3k, CL = 1000pF
Slew Rate
RL = 3k, CL = 51pF
RL = 3k, CL = 2500pF (Note 8)
15
6
30
V/µs
V/µs
Propagation Delay
Output Transition tHL High to Low (Note 5)
Output Transition tLH Low to High
0.6
0.5
1.3
1.3
µs
µs
1.3
1.7
2.4
V
V
Logic Input Voltage Level
5
7.3
– 6.5
–5
1.4
1.4
0.8
2
5
20
±9
±17
10
●
V
V
V
V
µA
mA
100
120
250
µA
kbaud
kbaud
Any Receiver
Input Voltage Thresholds
Input Low Threshold (VOUT = High)
Input High Threshold (VOUT = Low)
Hysteresis
●
●
0.8
●
0.1
0.4
1
V
3
5
7
kΩ
0.2
4.2
0.4
3.5
1
10
µA
– 10
10
– 20
20
mA
mA
250
350
600
600
ns
ns
Input Resistance
– 10V < VIN < 10V
Output Voltage
Output Low, IOUT = – 1.6mA
Output High, IOUT = 160µA (VCC = 5V)
●
●
Output Leakage Current
Shutdown (Note 4) 0 ≤ VOUT ≤ VCC
●
Output Short-Circuit Current
Sinking Current, VOUT = VCC
Sourcing Current, VOUT = 0V
Propagation Delay
Output Transition tHL High to Low (Note 6)
Output Transition tLH Low to High
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: Testing done at VCC = 5V and VON/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 shutdown are performed with VON/OFF = 0.1V. Supply current measurements
using DRIVER DISABLE are performed with VDRIVER DISABLE = 3V. For
LT1135, LT1139, LT1140 and LT1141 with 12V supplies, VOUT leakage is
200µA for VOUT forced to ±25V.
V
V
Note 5: For driver delay measurements, RL = 3k and CL = 51pF. Trigger
points are set between the driver’s input logic threshold and the output
transition to the zero crossing (tHL = 1.4V to 0V and tLH = 1.4V to 0V).
Note 6: For 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 negative voltage.
Note 8: For LT1137A, 4V/µs minimum.
5
LT1130A/LT1140A Series
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Driver Output Voltage
RL = 3k
6
OUTPUT HIGH
VCC = 5.5V
VCC = 5V
VCC = 4.5V
4
2
0
VCC = 4.5V
VCC = 5V
VCC = 5.5V
–2
–4
–6
–8
OUTPUT LOW
–10
–55 –25
50
25
0
75
TEMPERATURE (°C)
100
100
2.75
90
2.50
2.00
INPUT HIGH
1.75
1.50
INPUT LOW
1.25
10
50
25
0
75
TEMPERATURE (°C)
0
125
0
100
25
75
100
50
DATA RATE (kBaud)
125
Driver Disable Threshold
5
3.0
4
2.5
3
2
2.0
1.5
1.0
0.5
0
–55 –25
125
50
25
0
75
TEMPERATURE (°C)
LT1137A • TPC04
100
0
–55 –25
125
50
25
75
0
TEMPERATURE (°C)
LT1137A • TPC05
45
125
Driver Leakage in Shutdown
50
2.5
100
LT1137A • TPC06
Supply Current
ON/OFF Thresholds
3.0
150
LT1130A • TPC03
THRESHOLD VOLTAGE (V)
SUPPLY CURRENT (mA)
SUPPLY CURRENT (µA)
100
3 DRIVER
RL = 3k
CL = 2500pF
30
20
1
100
5 DRIVER
ON THRESHOLD
1.5
1.0
OFF THRESHOLD
35
LEAKAGE CURRENT (µA)
40
SUPPLY CURRENT (mA)
THRESHOLD VOLTAGE (V)
40
Supply Current in Driver Disable
1
2.0
50
0.75
Supply Current in Shutdown
0
25
50
75
TEMPERATURE (°C)
60
LT1137A • TPC02
100
0.1
–55 –25
70
1.00
LT1130A • TPC01
10
5 DRIVER
RL = 3k
CL = 2500pF
80
2.25
0.50
–55 –25
125
Supply Current vs Data Rate
3.00
SUPPLY CURRENT (mA)
DRIVER OUTPUT VOLTAGE (V)
8
Receiver Input Thresholds
THRESHOLD VOLTAGE (V)
10
3 DRIVER
30
25
1 DRIVER
20
15
NO LOAD
10
0.5
10
1
VOUT = 30V
VOUT = –30V
5
0
–55 –25
50
25
75
0
TEMPERATURE (°C)
100
125
LT1137A • TPC07
6
0
–55 –25
50
25
0
75
TEMPERATURE (°C)
100
125
LT1130A • TPC08
0.1
–55 –25
50
25
0
75
TEMPERATURE (°C)
100
125
LT1137A • TPC09
LT1130A/LT1140A Series
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Driver Short-Circuit Current
Receiver Short-Circuit Current
50
SHORT-CIRCUIT CURRENT (mA)
SHORT-CIRCUIT CURRENT (mA)
30
25
ISC +
20
15
ISC –
10
5
0
–55 –25
50
25
75
0
TEMPERATURE (°C)
100
125
40
ISC –
30
ISC +
20
10
0
–55 –25
50
25
0
75
TEMPERATURE (°C)
125
LT1137A • TPC11
LT1137A • TPC10
Driver Output Waveforms
Shutdown to Driver Output
DRIVER
OUTPUT HIGH
RL = 3k
100
DRIVER OUTPUT
RL = 3k
10
5
0
DRIVER OUTPUT
RL = 3k
CL = 2500pF
DRIVER – 5
OUTPUT LOW
RL = 3k – 10
INPUT
ON/OFF PIN
LT1137A • TPC12
LT1137A • TPC13
U
U
U
PI FU CTIO S
VCC: 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. Insufficient 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 impedance 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 + ≈ 2VCC –
1.5V. This pin requires an external charge storage capacitor C ≥ 1.0µF, tied to ground or VCC. Larger value capacitors 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 capacitors is recommended to reduce ripple.
7
LT1130A/LT1140A Series
U
U
U
PI FU CTIO S
V –: Negative Supply Output (RS232 Drivers). V – ≈ –(2VCC
– 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 VCC.
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, 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.
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 Levels. Outputs are in a high impedance state when in shutdown mode to allow data line sharing. Outputs are fully
short-circuit protected to ground or VCC with the power
on, off, or in shutdown mode.
U
ESD PROTECTIO
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 contact methods per IEC-1000-4-2.
8
ESD Test Circuit
1
V+
5V VCC 2
0.1µF
0.1µF
+
0.2µF
DRIVER 1 OUT
RX1 IN
DRIVER 2 OUT
RS232
LINE PINS
PROTECTED
TO ±15kV
RX2 IN
RX3 IN
RX4 IN
DRIVER 3 OUT
RX5 IN
ON/OFF
28
LT1137A
V–
27
3
26
4
25
5
24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
+
0.1µF
0.2µF
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
GND
DRIVER DISABLE
LT1130A • ESD TC
LT1130A/LT1140A Series
U
TYPICAL APPLICATIO S
Operation Using 5V and 12V Power Supplies
V+
5V VCC
12V V +
0.01µF
0.01µF
2
C1+
3
26
C1–
4
25
5
24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
RX IN
DRIVER OUT
RX IN
RX IN
RX IN
DRIVER OUT
RX IN
ON/0FF = 5V
V–
28
LT1137A
VCC
DRIVER OUT
TO LINE
1
27
0.1µF
0.1µF
×2
DRIVER IN
RX OUT
DRIVER IN
RX OUT
TO LOGIC
RX OUT
RX OUT
DRIVER IN
RX OUT
GND
DRIVER DISABLE
LT1130A • TA03
Typical Mouse Driving Application
0.1µF
MOUSE
V+
1
5V VCC
2
26
4
25 DRIVER 1 IN
DRIVER 1 OUT
5
24 RX1 OUT
RX1 IN
6
23 DRIVER 2 IN
DRIVER 2 OUT
7
22 RX2 OUT
RX2 IN
8
21 RX3 OUT
RTS
RX3 IN
9
20 RX4 OUT
TX
RX4 IN 10
0.1µF
×2
DCD
(1)
DSR
RX
OPTICS
V–
(5)
(9)
DB9
V–
27
3
V+
LOGIC
28
LT1137A
0.1µF
×2
19 DRIVER 3 IN
LOGIC “0”
LOGIC “0”
MOUSE DATA
LOGIC “1”
18 RX5 OUT
CTS
DRIVER 3 OUT 11
DTR
RX5 IN 12
17 GND
RI
ON/OFF 13
16 DRIVER DISABLE
14
0.1µF
15
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)
0.205 – 0.212**
(5.20 – 5.38)
0.068 – 0.078
(1.73 – 1.99)
0.397 – 0.407*
(10.07 – 10.33)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
0° – 8°
0.005 – 0.009
(0.13 – 0.22)
0.022 – 0.037
(0.55 – 0.95)
0.301 – 0.311
(7.65 – 7.90)
0.0256
(0.65)
BSC
0.002 – 0.008
(0.05 – 0.21)
0.010 – 0.015
*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)
0.130 ± 0.005
(3.302 ± 0.127)
0.300 – 0.325
(7.620 – 8.255)
0.009 – 0.015
(0.229 – 0.381)
(
0.020
(0.508)
MIN
+0.035
0.325 –0.015
+0.889
8.255
–0.381
1.040*
(26.416)
MAX
0.045 – 0.065
(1.143 – 1.651)
)
0.065
(1.651)
TYP
0.125
(3.175)
MIN
0.005
(0.127)
MIN
0.100 ± 0.010
(2.540 ± 0.254)
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
0.255 ± 0.015*
(6.477 ± 0.381)
0.018 ± 0.003
(0.457 ± 0.076)
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)
0.300 – 0.325
(7.620 – 8.255)
0.130 ± 0.005
(3.302 ± 0.127)
1.265*
(32.131)
MAX
0.045 – 0.065
(1.143 – 1.651)
0.020
(0.508)
MIN
(
8.255
+0.889
–0.381
)
0.125
(3.175)
MIN
0.100 ± 0.010
(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)
10
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
0.255 ± 0.015*
0.065 (6.477 ± 0.381)
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
+0.035
0.325 –0.015
24
0.018 ± 0.003
(0.457 ± 0.076)
N24 1197
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
(1.778)
TYP
0.045 – 0.065
(1.143 – 1.651)
0.150 ± 0.005
(3.810 ± 0.127)
0.600 – 0.625
(15.240 – 15.875)
1.455*
(36.957)
MAX
28
27
26
25
24
23
22
21
20
19
18
17
16
1
2
3
4
5
6
7
8
9
10
11
12
13
0.015
(0.381)
MIN
0.009 – 0.015
(0.229 – 0.381)
(
0.505 – 0.560*
(12.827 – 14.224)
+0.035
0.625 –0.015
15.87
+0.889
–0.381
15
0.125
(3.175)
MIN
)
0.018 ± 0.003
(0.457 ± 0.076)
0.035 – 0.080
(0.889 – 2.032)
0.100 ± 0.010
(2.540 ± 0.254)
14
N28 1197
*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**
(7.391 – 7.595)
0.496 – 0.512*
(12.598 – 13.005)
0.037 – 0.045
(0.940 – 1.143)
0.093 – 0.104
(2.362 – 2.642)
0.010 – 0.029 × 45°
(0.254 – 0.737)
19
20
18
17
16
15
14
13
12
11
0° – 8° TYP
0.009 – 0.013
(0.229 – 0.330)
0.050
(1.270)
TYP
NOTE 1
0.016 – 0.050
(0.406 – 1.270)
0.394 – 0.419
(10.007 – 10.643)
NOTE 1
0.004 – 0.012
(0.102 – 0.305)
0.014 – 0.019
(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
2
1
*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
3
5
4
7
6
9
8
10
S20 (WIDE) 0396
SW Package
24-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
0.598 – 0.614*
(15.190 – 15.600)
0.291 – 0.299**
(7.391 – 7.595)
0.010 – 0.029 × 45°
(0.254 – 0.737)
0.093 – 0.104
(2.362 – 2.642)
0.037 – 0.045
(0.940 – 1.143)
24
23
22
21
20
19
18
17
16
15
14
13
0° – 8° TYP
0.009 – 0.013
(0.229 – 0.330)
NOTE 1
0.016 – 0.050
(0.406 – 1.270)
0.050
(1.270)
TYP
0.014 – 0.019
(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
*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
0.394 – 0.419
(10.007 – 10.643)
NOTE 1
0.004 – 0.012
(0.102 – 0.305)
1
2
3
4
5
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
6
7
8
9
10
11
12
S24 (WIDE) 0996
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**
(7.391 – 7.595)
0.697 – 0.712*
(17.70 – 18.08)
0.037 – 0.045
(0.940 – 1.143)
0.010 – 0.029 × 45° 0.093 – 0.104
(2.362 – 2.642)
(0.254 – 0.737)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
0° – 8° TYP
0.009 – 0.013
(0.229 – 0.330)
0.050
(1.270)
TYP 0.014 – 0.019
(0.356 – 0.482)
TYP
NOTE 1
0.394 – 0.419
(10.007 – 10.643)
NOTE 1
0.004 – 0.012
(0.102 – 0.305)
0.016 – 0.050
(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
1
2
3
4
5
6
7
8
9 10 11 12 13 14
S28 (WIDE) 0996
*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
C2 –
+
1µF
C1+ 3
22
C2 +
+
C1–
1µF
4
21
5
20
6
19
7
18
DRIVER OUT
RX IN
DRIVER OUT
TO
RS232
LINE
RX IN
RX IN
RX IN
DRIVER OUT
RX IN
LT1133A
8
17
9
16
10
15
11
14
12
13
V+ 1
5V VCC
1µF
NC
+
23
V+ 1
5V VCC 2
DRIVER IN
RX IN
RX OUT
DRIVER OUT
DRIVER IN
RX OUT
RX OUT
RX IN
TO
LOGIC
RX OUT
TO
RS232
LINE
DRIVER OUT
RX IN
DRIVER OUT
DRIVER IN
RX IN
RX OUT
RX IN
GND
ON/OFF
2
24
LT1141A
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
V–
+
24
V–
NC
RX OUT
DRIVER IN
RX OUT
DRIVER IN
RX OUT
TO
LOGIC
DRIVER IN
RX OUT
RX OUT
GND
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
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417 ● (408) 432-1900
FAX: (408) 434-0507● TELEX: 499-3977 ● www.linear-tech.com
1130asfb LT/TP 0799 2K REV B • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 1993