LT1039A Linear Technology, LT1039A Datasheet

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LT1039A

Manufacturer Part Number
LT1039A
Description
Triple RS232 Driver/Receiver with Shutdown
Manufacturer
Linear Technology
Datasheet

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**50 RESISTORS
APPLICATIONS
FEATURES
TYPICAL
*BIAS PIN USED
MAY BE REQUIRED
FOR IEC-1000-4-2
ESD PROTECTION
DEPENDING UPON
PC BOARD AND
CONNECTOR LEAD LENGTH
TO KEEP THE
RECEIVER ON
WHILE IN SHUTDOWN
RS232 Interface
Terminals
Modems
On-Chip ESD Protection:
125kBd Operation with 3k /2500pF Load
250kBd Operation with 3k /1000pF Load
Operates from 5V to 15V Supplies
Fully Protected Against Overload
Outputs Can Be Driven 30V Without Damage
Three-State Outputs; Outputs Open When Off
Bipolar Circuit—No Latchup
Triple Driver/Receiver
No Supply Current in Shutdown
30k Input Impedance
Meets All RS232 Specifications
16-Pin Version—Pin Compatible with MC145406
Available in SO Package
30V Input Range
15kV Human Body Model
15kV IEC-1000-4-2 Air Gap Test**
8kV IEC-1000-4-2 Contact Test
APPLICATION
RS232 OUT
RS232 OUT
RS232 OUT
U
RS232 IN
RS232 IN
RS232 IN
50 **
50 **
50 **
BIAS*
– 12V
12V
1
2
3
4
5
6
7
8
9
U
V
V
+
LT1039A
30k
30k
30k
1039A TA01
GND
V
CC
18
17
16
15
14
13
12
11
10
5V
ON/OFF
LOGIC
LOGIC
LOGIC
LOGIC
LOGIC
LOGIC
DESCRIPTION
The LT
includes shutdown. Each receiver will accept up to 30V
input and can drive either TTL or CMOS logic. The RS232
drivers accept TTL logic inputs and output RS232 voltage
levels. The outputs are fully protected against overload
and can be shorted to ground or up to 30V without
damage to the drivers. Additionally, when the system is
shut down or power is off, the outputs are in a high
impedance state allowing data line sharing. On-chip ESD
protection eliminates the need for external protection
devices.
A bias pin allows one receiver to be kept on while the rest
of the part is shut down.
The LT1039A is also available in the 16-pin version,
without shutdown or bias pin functions.
For applications requiring operation from a single 5V
supply, see the LT1180A/LT1181A and LT1130A data
sheets.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Triple RS232 Driver/Receiver
®
1039A is a triple RS232 driver/receiver that
– 0.4
– 0.8
–1.2
–1.6
– 2.0
1.2
0.8
0.4
V
V
+
0
0.5
LT1039A/LT1039A-16
1.0
Driver Output Swing
U
OUTPUT CURRENT (mA)
1.5
2.0
2.5
with Shutdown
3.0
3.5
4.0
1039A TA02
4.5
5.0
1

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LT1039A Summary of contents

Page 1

... A bias pin allows one receiver to be kept on while the rest of the part is shut down. The LT1039A is also available in the 16-pin version, without shutdown or bias pin functions. For applications requiring operation from a single 5V supply, see the LT1180A/LT1181A and LT1130A data sheets ...

Page 2

... V OUT 2 U RATINGS Short-Circuit Duration ..................................... Indefinite Operating Temperature Range LT1039AC................................................ – to 25V LT1039AI ........................................... – LT1039AM ....................................... – 125 C Storage Temperature Range ................. – 150 C – 30V to V – 30V Lead Temperature (Soldering, 10 sec).................. 300 ORDER PART ...

Page 3

... Note for LT1039AM grade devices. ON/OFF Note 0.4V for – 100 C and V ON/OFF A 100 C T 125 C. Does not apply to LT1039A-16 part TYPICAL PERFORMANCE CHARACTERISTICS Driver Output Short-Circuit Current SINKING 35 ...

Page 4

... LT1039A/LT1039A- TYPICAL PERFORMANCE CHARACTERISTICS Supply Current in Shutdown 1000 SUPPLY CURRENT MEASURED + INTO V AND V CC 100 10 1 –55 – 100 125 TEMPERATURE ( C) 1039A G04 ON/OFF Pin Current vs Voltage – 5 – INPUT VOLTAGE (V) Output Waveforms ...

Page 5

... Outputs are fully short-circuit protected to ground or V with power on, off or in the shutdown mode. CC ON/OFF (Pin 17): Controls the operation mode of the LT1039A and is TTL/CMOS compatible. A logic low puts + – and V = 0V) to the device in the shutdown mode which reduces input supply current to zero and places both driver and receiver outputs in a high impedance state ...

Page 6

... Older RS232 Drivers and Other CMOS Drivers + V – V Placing the LT1039A in the shutdown mode (Pin 17 low) puts both the driver and receiver outputs in a high imped- ance state. This allows data line sharing and transceiver applications. Sharing a Transmitter Line LOGIC ...

Page 7

... RS232 compatibility. Input Overvoltage Protection 1k RS232 INPUT 30V 5.6k 30V The receiver input impedance of the LT1039A is nominally 30k . For applications requiring a 5k input impedance, a 5.6k resistor can be connected from the receiver input to ground. 5k Impedance Matching RECEIVER RS232 INPUT 30k 5 ...

Page 8

... LT1039A/LT1039A-16 PACKAGE DESCRIPTION CORNER LEADS OPTION (4 PLCS) 0.023 – 0.045 (0.584 – 1.143) HALF LEAD 0.045 – 0.068 (1.143 – 1.727) FULL LEAD OPTION 0.300 BSC (0.762 BSC) 0.008 – 0.018 0 – 15 (0.203 – 0.457) 0.385 0.025 (9.779 0.635) NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS. ...

Page 9

... MIN 0.005 0.125 (0.127) (3.175) MIN MIN 0.100 0.010 (2.540 0.254) LT1039A/LT1039A- 0.065 (1.651) TYP 0.018 0.003 (0.457 0.076) N16 0695 ...

Page 10

... LT1039A/LT1039A-16 PACKAGE DESCRIPTION 0.291 – 0.299** (7.391 – 7.595) 0.010 – 0.029 (0.254 – 0.737) 0.009 – 0.013 NOTE 1 (0.229 – 0.330) 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" ...

Page 11

... SEE NOTE 0.093 – 0.104 45 (2.362 – 2.642) 0 – 8 TYP 0.050 (1.270) TYP 0.014 – 0.019 (0.356 – 0.482) TYP LT1039A/LT1039A- 0.394 – 0.419 (10.007 – 10.643 0.037 – 0.045 (0.940 – 1.143) 0.004 – 0.012 (0.102 – ...

Page 12

... LT1039A/LT1039A-16 U TYPICAL APPLICATION LT1180A (Driver/Receiver with Power Supply) Driving an LT1039A SHUTDOWN 18 ON/OFF LT1180A TTL IN TTL IN TTL OUT TTL OUT 0 – 0 – C2 RELATED PARTS PART NUMBER DESCRIPTION ® LTC 485 Low Power RS485 Transceiver LT1137A 5V 3 Driver/5 Receiver RS232 Transceiver ...

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