LT1039/LT1039-16
RS232 Driver/Receiver
with Shutdown
FEATURES
DESCRIPTIO
n
Operates from 5V to 15V Supplies The LT 1039 is a triple RS232 driver/receiver that in-
n
cludes shutdown. Each receiver will accept up to 30V
Fully Protected Against Overload
n
input and can drive either TTL or CMOS logic. The RS232
Outputs Can Be Driven 30V Without Damage
n drivers accept TTL logic inputs and output RS232 voltage
Three-State Outputs; Outputs Open When Off
n levels. The outputs are fully protected against overload
Bipolar CircuitNo Latchup
and can be shorted to ground or up to 30V without
n
30V Input Range
damage to the drivers. Additionally, when the system is
n
Triple Driver/Receiver
shut down or power is off, the outputs are in a high
n
No Supply Current in Shutdown
impedance state allowing data line sharing. Bipolar cir-
n
30kW Input Impedance
cuitry makes this driver/receiver exceptionally rugged
n
Meets All RS232 Specifications
against overloads and immune to latchup.
n
16-Pin VersionPin Compatible with MC145406
n
Available in SO Package A BIAS pin allows one receiver to be kept on while the rest
n
15kV ESD: LT1039A of the part is shut down.
The LT1039 is also available in the 16-pin version,
U
without shutdown or BIAS pin functions.
APPLICATIO S
For applications requiring operation from a single 5V
n
RS232 Interface
supply, see the LT1080/LT1081, LT1180A/LT1181A and
n
Terminals
LT1130A data sheets. For applications requiring 15kV
n
Modems
ESD, see the LT1039A.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
1 18
+ Driver Output Swing
12V 5V
V V
CC
LT1039
+
2 17
V
BIAS* ON/OFF
3 16
RS232 IN
LOGIC
POSITIVE
0.5
30k
4 15
RS232 OUT LOGIC
1.5
5 14
RS232 IN LOGIC
NEGATIVE
30k
1.0
6 13
RS232 OUT LOGIC
7 12
RS232 IN LOGIC 0.5
30k
*BIAS PIN USED V
8 11
RS232 OUT LOGIC
0 2 4 6 8 10
TO KEEP THE
9 10
RECEIVER ON
OUTPUT CURRENT (mA)
12V V GND
WHILE IN SHUTDOWN
1039 TA02
1039 TA01
1039fd
1
OUTPUT VOLTAGE (V)
U
ULT1039/LT1039-16
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage Short-Circuit Duration ..................................... Indefinite
+
Driver (V , V ) .................................................. 16V Operating Temperature Range
Receiver (V ) ....................................................... 7V LT1039C .................................................. 0 C to 70 C
CC
Logic Inputs ................................................... V to 25V LT1039I ...............................................40 C to 85 C
Receiver Inputs........................................................ 30 LT1039M ...........................................55 C to 125 C
ON/OFF Input ............................................... GND to 12V Storage Temperature Range ................. 65 C to 150 C
+
Driver Outputs ........................ (V + 30V) to (V 30V) Lead Temperature (Soldering, 10 sec).................. 300 C
PACKAGE/ORDER INFORMATION
TOP VIEW
ORDER PART ORDER PART
TOP VIEW
+
NUMBER NUMBER
V 1 18 V
CC
+
1 16 V
V
CC
2 17 ON/OFF
BIAS
2 15 REC1 OUT LT1039CN16 LT1039CN
REC1 IN
REC1 IN 3 16 REC1 OUT
TR1 OUT 3 14 TR1 IN
LT1039CSW16 LT1039CSW
TR1 OUT 4 15 TR1 IN
4 REC2 OUT
REC2 IN 13
5 REC2 OUT LT1039IN
REC2 IN 14
5 12 TR2 IN
TR2 OUT
6 13 TR2 IN
TR2 OUT LT1039ISW
CONSULT FACTORY
REC3 IN 6 11 REC3 OUT
REC3 IN 7 12 REC3 OUT
FOR
TR3 OUT 7 10 TR3 IN AVAILABILITY
8 TR3 IN
TR3 OUT 11
8 9 GND
V
9 10 GND
V
N PACKAGE SW PACKAGE
N PACKAGE SW PACKAGE
16-LEAD PDIP 16-LEAD PLASTIC SO WIDE
18-LEAD PDIP 18-LEAD PLASTIC SO WIDE
T = 150 C, q = 140 C/ W (N)
T = 150 C, q = 120 C/ W(N)
JMAX JA
JMAX JA
T = 150 C, q = 150 C/ W (SW)
T = 150 C, q = 120 C/ W(SW)
JMAX JA
JMAX JA
J PACKAGE
J PACKAGE
LT1039CJ
16-LEAD CERDIP
LT1039MJ16
18-LEAD CERDIP
T = 150 C, q = 100 C/ W (J) T = 150 C, q = 100 C/ W(J)
LT1039MJ
JMAX JA JMAX JA
OBSOLETE PACKAGES
Consider the N Package for Alternate Source
ELECTRICAL CHARACTERISTICS
The l denotes specifications which apply over the full operating temperature range, otherwise specifications are at T = 25 C.
A
PARAMETER CONDITIONS MIN TYP MAX UNITS
+
Driver V = 12V, V = 12V, V = 2.5V (Note 2)
ON/OFF
Output Voltage Swing Load = 3k to Ground
+ +
Positive l V 0.4 V 0.1 V
Negative l V + 1.5 V + 1.0 V
Logic Input Voltage Levels Input Low Level (V = High) l 1.4 0.8 V
OUT
Input High Level (V = Low) l 2.0 1.4 V
OUT
Logic Input Current V 2.0V 1 20 m A
IN
V 0.8V 5 20 m A
IN
Output Short-Circuit Current Sourcing Current, V = 0V 5 15 mA
OUT
Sinking Current, V = 0V 5 15 mA
OUT
Output Leakage Current Shutdown (Notes 3, 4), V = 18V, V = 0V l 10 (25 C) 200 m A
OUT IN
Supply Leakage Current Shutdown (Note 3) l 1 (25 C) 100 m A
Slew Rate R = 3k, C = 51pF 4 15 30 V/m s
L L
Supply Current V = Low 4 8 mA
OUT
1039fd
2
U W U
W
U WW