DESCRIPTIO Operates from Single Supply Supply Current: 220µA Prot

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DESCRIPTIO Operates from Single Supply Supply Current: 220µA Prot

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LTC1383 Power RS232 Transceiver
DESCRIPTIO
Operates from Single Supply Supply Current: 220µA Protection Over ±10kV Available 16-Pin SOIC Narrow Package Uses Small Capacitors: 0.1µF Operates 120kBaud Output Overvoltage Does Force Current Back into Supplies RS232 Lines Forced ±25V Without Damage Compatible with LT1181A MAX232A
LTC1383 ultra-low power 2-driver/2-receiver RS232 transceiver that operates from single supply. charge pump requires only four spacesaving 0.1µF capacitors. supply current (ICC) transceiver only 220µA with driver outputs unloaded. LTC1383 fully compliant with data rate overvoltage RS232 specifications. transceiver operate 120kbaud with 2500pF, load. Both driver outputs receiver inputs forced ±25V without damage survive multiple ±10kV strikes.
APPLICATI
Notebook Computers Palmtop Computers
TYPICAL APPLICATI
0.1µF 0.1µF 300k LOGIC INPUT LOGIC OUTPUT LTC1383 300k
0.1µF
Quiescent Supply Current Temperature
TEST CONDITION:
QUIESCENT CURRENT (µA)
0.1µF
QUIESCENT CURRENT
LOGIC INPUT
OUTPUT
OUTPUT INPUT
LOGIC OUTPUT
INPUT
LTC1383 TA01
TEMPERATURE (°C)
LTC1383 TA02
LTC1383 ABSOLUTE RATI
PACKAGE/ORDER ATIO
VIEW
Supply Voltage (VCC) Input Voltage Driver 0.3V 0.3V Receiver Digital Input 0.3V 0.3V Output Voltage Driver Receiver 0.3V 0.3V Short-Circuit Duration Driver Output Indefinite Receiver Output Indefinite Operating Temperature Range 70°C Storage Temperature Range 65°C 150°C Lead Temperature (Soldering, sec). 300°C
ORDER PART NUMBER LTC1383CN LTC1383CS
PACKAGE 16-LEAD PLASTIC
PACKAGE 16-LEAD NARROW PLASTIC SOIC
TJMAX 125°C, 65°C/W TJMAX 125°C, 95°C/W
Consult factory Industrial Military grade products.
ELECTRICAL CHARACTERISTICS
PARAMETER Driver Output Voltage Swing Logic Input Voltage Level Logic Input Current Output Short-Circuit Current Receiver Input Voltage Thresholds Hysteresis Input Resistance Output Voltage Output Short-Circuit Current Power Supply Generator Output Voltage Output Voltage CONDITIONS Input Level (VOUT High) Input High Level (VOUT Low) VOUT Input Threshold Input High Threshold
0.1µF, unless otherwise noted.
Positive Negative
UNITS
Output Low, IOUT 1.6mA (VCC Output High, IOUT 160µA (VCC Sinking Current, VOUT Sourcing Current VOUT IOUT IOUT IOUT IOUT
LTC1383
ELECTRICAL CHARACTERISTICS
PARAMETER Power Supply Supply Current Digital Input Threshold Digital Input Threshold High CONDITIONS Load (Note
0.1µF, unless otherwise noted.
0.22
UNITS
CHARACTERISTICS
PARAMETER Slew Rate Driver Propagation Delay (TTL RS232) Receiver Propagation Delay (RS232 TTL)
0.1µF, unless otherwise noted.
CONDITIONS 51pF 2500pF (Figure (Figure (Figure (Figure
UNITS V/µs V/µs
denotes specifications which apply over operating temperature range 70°C. Note Absolute maximum ratings those values beyond which life device impaired.
Note Supply current measured with driver receiver outputs unloaded.
TYPICAL PERFORMANCE CHARACTERISTICS
Driver Output Voltage Temperature
DRIVER OUTPUT VOLTAGE
OUTPUT HIGH
THRESHOLD VOLTAGE
TEMPERATURE (°C) OUTPUT 4.5V
SUPPLY CURRENT (mA)
4.5V
LTC1383 TPC01
Receiver Input Thresholds Temperature
Supply Current Data Rate
2500pF DRIVERS ACTIVE
TEMPERATURE (°C)
DATA RATE (kBAUD)
LTC1383 TPC02
LTC1383 TPC03
LTC1383 TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current Temperature
SUPPLY CURRENT (mA) DRIVER OUTPUT 2500pF
DRIVER LOADED DRIVERS LOADED
TEMPERATURE (°C)
LTC1383 TPC04
CTIO
VCC: Input Supply Pin. This should decoupled with 0.1µF ceramic capacitor. GND: Ground Pin. Positive Supply Output (RS232 Drivers).
This requires external capacitor 0.1µF charge storage. capacitor tied ground VCC. With multiple devices, pins share common capacitor. large numbers devices, increasing size shared common storage capacitors recommended reduce ripple. Negative Supply Output (RS232 Drivers). (2VCC 2V). This requires external capacitor 0.1µF charge storage. C1+, C1-, C2+, C2-: Commutating Capacitor Inputs. These pins require external capacitors 0.1µF: from another from maintain
Driver Output Waveforms
Receiver Output Waveforms
DRIVER OUTPUT INPUT
RECEIVER OUTPUT 51pF
INPUT
LTC1383 TPC05
LTC1383 TPC06
charge pump efficiency, capacitor's effective series resistance should less than RS232 Driver Input Pins. Inputs TTL/CMOS compatible. inputs unused drivers left unconnected since 300k input pull-up resistors included chip. OUT: Driver Outputs RS232 Voltage Levels. driver outputs protected against ±10kV human body model discharges. Receiver Inputs. These pins forced ±25V without damage. receiver inputs protected against ±10kV human body model discharges. Each receiver provides 0.4V hysteresis noise immunity. OUT: Receiver Outputs with TTL/CMOS Voltage Levels.
LTC1383
SWITCHI WAVEFOR
DRIVER INPUT DRIVER OUTPUT 1.4V 1.4V
LTC1383
Figure Driver Propagation Delay Timing
TEST CIRCUITS
Driver Timing Test Load
DRIVER OUTPUT DRIVER 51pF
INPUT 51pF
DRIVER INPUT
LTC1383 TA03
0.1µF
0.1µF
LOGIC INPUT
LOGIC INPUT LOGIC OUTPUT
LOGIC OUTPUT
INPUT OUTPUT
1.7V
1.3V 2.4V 0.8V
LTC1383
Figure Receiver Propagation Delay Timing
Receiver Timing Test Load
OUTPUT
LTC1383 TA04
Test Circuit
LTC1383 300k 300k OUTPUT INPUT RS232 LINE PINS PROTECTED ±10kV 0.1µF 0.1µF
OUTPUT
INPUT
LTC1383 TA05
LTC1383
TYPICAL APPLICATIONS
Paralleling Power Supply Generator with Common Storage Capacitors
0.1µF 0.1µF 300k LOGIC INPUT LOGIC OUTPUT LTC1383 300k
LOGIC INPUT
LOGIC OUTPUT
PACKAGE DESCRIPTION
0.300 0.325 (7.620 8.255)
0.009 0.015 (0.229 0.381)
+0.025 0.325 -0.015 8.255 +0.635 -0.381
0.1µF 0.1µF
0.1µF 0.1µF 300k LTC1383 300k
OUTPUT
LOGIC INPUT
OUTPUT
OUTPUT INPUT
LOGIC INPUT LOGIC OUTPUT
OUTPUT INPUT
INPUT
LOGIC OUTPUT
INPUT
LTC1383 TA06
Dimensions inches (millimeters) unless otherwise noted. Package 16-Lead Plastic
0.770 (19.558)
0.260 0.010 (6.604 0.254)
0.130 0.005 (3.302 0.127)
0.045 0.065 (1.143 1.651)
0.015 (0.381)
0.065 (1.651)
0.125 (3.175)
0.045 0.015 (1.143 0.381) 0.100 0.010 (2.540 0.254)
0.018 0.003 (0.457 0.076)
0492
LTC1383
PACKAGE DESCRIPTION
0.010 0.020 (0.254 0.508) 0.008 0.010 (0.203 0.254)
0.016 0.050 0.406 1.270
Information furnished Linear Technology Corporation believed accurate reliable. However, responsibility assumed use. Linear Technology Corporation makes representation that interconnection circuits described herein will infringe existing patent rights.
Dimensions inches (millimeters) unless otherwise noted. Package 16-Lead Plastic SOIC
0.386 0.394* (9.804 10.008)
0.228 0.244 (5.791 6.197)
0.150 0.157* (3.810 3.988)
0.053 0.069 (1.346 1.752)
0.004 0.010 (0.101 0.254)
0.014 0.019 (0.355 0.483)
0.050 (1.270)
SO16 0893
*THESE DIMENSIONS INCLUDE MOLD FLASH PROTRUSIONS. MOLD FLASH PROTRUSIONS SHALL EXCEED 0.006 INCH (0.15mm).
LTC1383
U.S. Area Sales Offices
NORTHEAST REGION Linear Technology Corporation Oxford Valley 2300 Lincoln Hwy.,Suite Langhorne, 19047 Phone: (215) 757-8578 FAX: (215) 757-5631 Linear Technology Corporation Lowell St., Suite Wilmington, 01887 Phone: (508) 658-3881 FAX: (508) 658-2701 SOUTHEAST REGION Linear Technology Corporation 17060 Dallas Parkway Suite Dallas, 75248 Phone: (214) 733-3071 FAX: (214) 380-5138 CENTRAL REGION Linear Technology Corporation Chesapeake Square Mitchell Court, Suite A-25 Addison, 60101 Phone: (708) 620-6910 FAX: (708) 620-6977 SOUTHWEST REGION Linear Technology Corporation 22141 Ventura Blvd. Suite Woodland Hills, 91364 Phone: (818) 703-0835 FAX: (818) 703-0517 NORTHWEST REGION Linear Technology Corporation Sycamore Milpitas, 95035 Phone: (408) 428-2050 FAX: (408) 432-6331
International Sales Offices
FRANCE Linear Technology S.A.R.L. Immeuble Quartz" Chemin Justice 92290 Chatenay Malabry France Phone: 33-1-41079555 FAX: 33-1-46314613 GERMANY Linear Techonolgy GmbH Untere Hauptstr. D-85386 Eching Germany Phone: 49-89-3197410 FAX: 49-89-3194821 JAPAN Linear Technology Bldg. 4-4-12 Iidabashi, Chiyoda-Ku Tokyo, Japan Phone: 81-3-3237-7891 FAX: 81-3-3237-8010 KOREA Linear Technology Korea Branch Namsong Building, #505 Itaewon-Dong 260-199 Yongsan-Ku, Seoul Korea Phone: 82-2-792-1617 FAX: 82-2-792-1619 SINGAPORE Linear Technology Pte. Ltd. Boon Keng Road #02-15 Kallang Ind. Estates Singapore 1233 Phone: 65-293-5322 FAX: 65-292-0398 TAIWAN Linear Technology Corporation 801, Sec. Chung Shan Taipei, Taiwan, R.O.C. Phone: 886-2-521-7575 FAX: 886-2-562-2285 UNITED KINGDOM Linear Technology (UK) Ltd. Coliseum, Riverside Camberley, Surrey GU15 United Kingdom Phone: 44-276-677676 FAX: 44-276-64851
World Headquarters
Linear Technology Corporation 1630 McCarthy Blvd. Milpitas, 95035-7487 Phone: (408) 432-1900 FAX: (408) 434-0507
0294
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, 95035-7487
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977
LT/GP 0594 PRINTED
LINEAR TECHNOLOGY CORPORATION 1994

DESCRIPTIO Operates from Single Supply Supply Current: 220µA Prot

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