LT1081IS Linear Technology, LT1081IS Datasheet

LT1081IS

Manufacturer Part Number
LT1081IS
Description
Manufacturer
Linear Technology
Datasheet

Specifications of LT1081IS

Interface Circuit Standard 1
RS-232
Number Of Receivers
2
Number Of Transmitters
2
Number Of Transceivers
1
Data Transmission Topology
Point-to-Point
Receiver Signal Type
Single-Ended
Transmitter Signal Type
Single-Ended
Single Supply Voltage (typ)
5V
Single Supply Voltage (min)
4.5V
Single Supply Voltage (max)
5.5V
Dual Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Supply Current
22mA
Power Supply Requirement
Single
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
16
Package Type
SOIC N
Lead Free Status / Rohs Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1081IS
Quantity:
500
Part Number:
LT1081IS
Manufacturer:
LT/凌特
Quantity:
20 000
Part Number:
LT1081IS#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1081ISW
Manufacturer:
LT/凌特
Quantity:
20 000
Part Number:
LT1081ISW
Manufacturer:
LTC
Quantity:
5 043
Part Number:
LT1081ISW#TR
Manufacturer:
LINEAR
Quantity:
15 412
Part Number:
LT1081ISW#TRPBF
Manufacturer:
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Quantity:
20 000
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
Superior to CMOS
– Improved Speed: Operates over 120kBaud
– Improved Protection: Outputs Can Be Forced
– Three-State Outputs Are High
– Only Needs 1 F Capacitors
Absolutely No Latchup
CMOS Comparable Low Power: 60mW
Can Power Additional RS232 Drivers: 10mA
Supply Current in Shutdown: 1 A
Available in SO Package
Available with or without Shutdown
Portable Computers
Battery-Powered RS232 Systems
Power Supply Generator
Terminals
Modems
OUTPUTS
INPUTS
LOGIC
LOGIC
to 30V without Damage
Impedance When Off
ON/OFF
1 F
1 F
12
11
13
10
18
2
4
5
6
U
LT1080
5k
5k
17
3
7
15
8
14
9
16
U
1 F
1 F
1080/81 • TA01
5V INPUT
9V OUTPUT
–9V OUTPUT
RS232 OUTPUT
RS232 OUTPUT
RS232 INPUT
RS232 INPUT
5V RS232 Dual Driver/Receiver
DESCRIPTIO
The LT
receiver with charge pump to guarantee absolutely no
latchup. These interface optimized devices provide a real-
istic balance between CMOS levels of power dissipation
and real world requirements for ruggedness. The driver
outputs are fully protected against overload and can be
shorted to 30V. Unlike CMOS, the advanced architecture
of the LT1080/LT1081 does not load the signal line when
“shut down” or when power is off. Both the receiver and
RS232 outputs are put into a high impedance state. An
advanced output stage allows driving higher capacitive
loads at higher speeds with exceptional ruggedness
against ESD.
For applications requiring up to five drivers and five
receivers with charge pump in one package see the LT1130A
Series data sheet. A version of the LT1080/LT1081, the
LT1180A and LT1181A that use only 0.1 F capacitors, is
also available. All of Linear Technology’s RS232 ICs are
available in standard surface mount packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1080/LT1081 are the only dual RS232 driver/
Advanced Low Power
–10
–2
–4
–6
–8
10
8
6
4
2
0
0
R
V
R
CC
L
L
2
Supply Generator Outputs
TO V
TO V
= 5V
U
4
+
OUTPUT CURRENT (mA)
6
V
V
+
8
OUTPUT
OUTPUT
LT1080/LT1081
10 12 14 16 18 20
R
R
L
L
TO GND
TO GND
1080/81 TA01a
10801fe
1

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LT1081IS Summary of contents

Page 1

... Series data sheet. A version of the LT1080/LT1081, the LT1180A and LT1181A that use only 0.1 F capacitors, is also available. All of Linear Technology’s RS232 ICs are available in standard surface mount packages. , LTC and LT are registered trademarks of Linear Technology Corporation. 5V INPUT 9V OUTPUT 1 F –9V OUTPUT ...

Page 2

... C, JMAX LT1080CJ LT1080MJ T = 150 C, JMAX ORDER PART NUMBER TOP VIEW LT1081CN 15 GND LT1081CSW 14 TR1 OUT LT1081IN LT1081 13 REC1 IN LT1081ISW 12 REC1 OUT 11 TR1 IN 10 TR2 IN 9 REC2 OUT SW PACKAGE 16-LEAD PLASTIC SO WIDE = 120 C/ C C/W (SW PACKAGE LT1081CJ 16-LEAD CERDIP LT1081MJ = 100 C/W, ...

Page 3

ELECTRICAL C HARA TERISTICS C temperature range, otherwise specifications are at T PARAMETER Driver Output Voltage Swing Logic Input Voltage Level Logic Input Current Output Short-Circuit Current Output Leakage Current Data Rate (Note 6) Slew Rate Receiver Input Voltage Thresholds ...

Page 4

LT1080/LT1081 CTIO S (Pin numbers refer to LT1080) + – + – (Pins 6): Requires an external + – capacitor ( 1 F) from C1 ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Receiver Input Thresholds 3.00 2.75 2.50 2.25 INPUT HIGH 2.00 1.75 1.50 INPUT LOW 1.25 1.00 0.75 0.50 –55 – 100 TEMPERATURE ( C) 1080/81 G04 ON/OFF Pin Thresholds ...

Page 6

LT1080/LT1081 U U APPLICATIO S I FOR ATIO The driver output stage of the LT1080 offers significantly improved protection over older bipolar and CMOS de- signs. In addition to current limiting, the driver output can be externally forced to 30V ...

Page 7

U U APPLICATIO S I FOR ATIO When driving CMOS logic from a receiver that will be used in the SHUTDOWN mode and there is no other active receiver on the line, a 51k resistor can be placed from the ...

Page 8

LT1080/LT1081 PACKAGE DESCRIPTIO CORNER LEADS OPTION (4 PLCS) 0.045 – 0.068 (1.143 – 1.727) FULL LEAD OPTION 0.300 BSC (0.762 BSC) 0.008 – 0.018 (0.203 – 0.457) NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS CORNER LEADS ...

Page 9

PACKAGE DESCRIPTIO 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 +0.889 8.255 –0.381 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) 0.300 ...

Page 10

LT1080/LT1081 PACKAGE DESCRIPTIO 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) 0.016 – 0.050 (0.406 – 1.270) NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON ...

Page 11

... DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 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. ...

Page 12

... RS232 INPUT 30k – V GND 10 1080/81 • TA02 COMMENTS 0.1 F Capacitors, 10kV ESD 15kV ESD 16-Pin Narrow SO Package Up to 5DR/5RX Low Supply Current I = 220 A CC Low Supply Current I = 200 A CC LT/CPI 1101 1.5K REV E • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1991 10801fe ...

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