DESCRIPTIO Supply Current: 500µA 0.2µA Supply Current SHUTDOWN 50

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DESCRIPTIO Supply Current: 500µA 0.2µA Supply Current SHUTDOWN 50

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LTC1338 Power RS232 5-Driver/3-Receiver Transceiver
DESCRIPTIO
Supply Current: 500µA 0.2µA Supply Current SHUTDOWN 50µA Supply Current RECEIVER ALIVE Mode Protection Over ±10kV Operates from Single Supply Uses Small Capacitors: 0.1µF Operates 120k Baud Three-State Outputs High Impedance When Output Overvoltage Does Force Current Back into Supplies RS232 Lines Forced ±25V Without Damage Flowthrough Architecture
LTC1338 5-driver/ 3-receiver RS232 transceiver with very supply current. load condition, supply current only 500µA. charge pump only requires four 0.1µF capacitors. SHUTDOWN mode, supply current further reduced 0.2µA. RECEIVER ALIVE mode, three receivers kept alive supply current 50µA. RS232 outputs assume high impedance state SHUTDOWN with power off. LTC1338 fully compliant with data rate overvoltage RS232 specifications. transceiver operate 120k baud with 2500pF, load. Both driver outputs receiver inputs forced ±25V without damage, survive multiple ±10kV strikes.
APPLICATI
Battery-Powered Modems Battery-Powered Notebook Computers Palmtop Computers
TYPICAL APPLICATI
0.1µF 0.1µF DRIVER DRIVER DRIVER DRIVER DRIVER ENABLE
5-Drivers/3-Receivers with SHUTDOWN
LTC1338 0.1µF DRIVER DRIVER DRIVER DRIVER DRIVER DRIVER ENABLE
LTC1338 TA01
0.1µF
1200 1000
QUIESCENT CURRENT (µA)
SHUTDOWN CURRENT QUIESCENT CURRENT
TEST CONDITION: DRIVER INPUTS TIED VCC.
Supply Current
SHUTDOWN CURRENT (µA)
TEMPERATURE (°C)
LTC1338 TA02
LTC1338 ABSOLUTE
(Note
RATI
PACKAGE/ORDER ATIO
VIEW ENABLE
Supply Voltage (VCC) Input Voltage Driver 0.3V 0.3V Receiver Driver/Receiver Enable 0.3V 0.3V Output Voltage Driver Receiver 0.3V 0.3V Short Circuit Duration Driver Output Indefinite Receiver Output Indefinite Operating Temperature Range Commercial (LTC1338C) 70°C Industrial (LTC1338I) 40°C 85°C Storage Temperature Range 65°C 150°C Lead Temperature (Soldering, sec). 300°C
ORDER PART NUMBER LTC1338CG LTC1338CN LTC1338CS LTC1338IG LTC1338IN LTC1338IS
ENABLE
PACKAGE PACKAGE 28-LEAD PLASTIC 28-LEAD SSOP PACKAGE 28-LEAD PLASTIC
TJMAX 125°C, 96°C/W TJMAX 125°C, 56°C/W TJMAX 125°C, 85°C/W
ELECTRICAL CHARACTERISTICS
PARAMETER Driver Output Voltage Swing Logic Input Voltage Level Logic Input Current Output Short-Circuit Current Output Leakage Current Receiver Input Voltage Thresholds Hysteresis Input Resistance Output Voltage Output Short-Circuit Current Output Leakage Current Power Supply Generator Output Voltage Output Voltage Supply Rise Time CONDITIONS
0.1µF, unless otherwise noted.
Positive Negative
UNITS
Input Level (VOUT High) Input High Level (VOUT Low) VOUT SHUTDOWN, VOUT ±20V (Note Input Threshold Input High Threshold Output Low, IOUT 1.6mA (VCC Output High, IOUT 160µA (VCC Sinking Current, VOUT SHUTDOWN, VOUT (Note IOUT IOUT 12mA IOUT IOUT 12mA SHUTDOWN Turn-On
±500
LTC1338
ELECTRICAL CHARACTERISTICS 0.1µF, unless otherwise noted.
PARAMETER Power Supply Supply Current CONDITIONS Load (All Driver VCC)(Note 70°C Load (All Driver 0V)(Note 70°C Load (All Driver VCC)(Note 40°C 85°C Load (All Driver 0V)(Note 40°C 85°C RECEIVER ALIVE Mode (Note SHUTDOWN (Note UNITS
Supply Leakage Current (VCC) Driver/Receiver Enable Threshold Driver/Receiver Enable Threshold High
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 40°C 85°C. Note Absolute maximum ratings those values beyond which life device impaired. Note Supply current measured with driver receiver outputs unloaded. VDRIVER ENABLE VRECEIVER ENABLE VCC.
Note Supply current leakage current measurements SHUTDOWN performed with VDRIVER ENABLE VRECEIVER ENABLE Note Supply current measurement RECEIVER ALIVE mode performed with VDRIVER ENABLE VRECEIVER ENABLE VCC.
TYPICAL PERFOR CHARACTERISTICS
Driver Output Voltage
OUTPUT HIGH 4.5V
DRIVER OUTPUT VOLTAGE
THRESHOLD VOLTAGE
OUTPUT 4.5V TEMPERATURE (°C)
SUPPLY CURRENT (mA)
LTC1338 TPC01
Receiver Input Thresholds
Supply Current Data Rate
2500pF DRIVERS ACTIVE
TEMPERATURE (°C)
DATA RATE BAUD)
LTC1338 TPC02
LTC1338 TPC03
LTC1338
TYPICAL PERFOR CHARACTERISTICS
Supply Current
DRIVERS LOADED
LEAKAGE CURRENT (µA)
SHORT-CIRCUIT CURRENT (mA)
SUPPLY CURRENT (mA)
DRIVER LOADED
TEMPERATURE (°C)
LTC1338 TPC04
Receiver Short-Circuit Current
SHORT-CIRCUIT CURRENT (mA)
ISC-
ISC+
LTC1338 TPC08 LTC1338 TPC09
TEMPERATURE (°C)
CTIO
VCC: Input Supply Pin. Supply current less than 0.2µA SHUTDOWN mode. This should decoupled with 0.1µF ceramic capacitor. GND: Ground Pin. RECEIVER ENABLE: TTL/CMOS Compatible Enable Pin. Refer Table functional description. This float. DRIVER ENABLE: TTL/CMOS Compatible Enable Pin. Refer Table functional description. This float. Positive Supply Output (RS232 Drivers). 2VCC This requires external capacitor 0.1µF charge storage. capacitor tied ground With multiple devices, pins paralleled into common capacitors. large numbers devices, increasing size shared common storage capacitors recommended reduce ripple. Negative Supply Output (RS232 Drivers). 2VCC 1.5V. This requires external capacitor 0.1µF charge storage. C1+, C1-, C2+, C2-: Commutating Capacitor Inputs. These pins require external capacitors 0.1µF: from C1-, another from C2-. maintain charge pump efficiency, capacitor's effective series resistance should less than
Driver Leakage Shutdown
TEMPERATURE (°C)
Driver Short-Circuit Current
VOUT -20V
ISC- ISC+
VOUT
TEMPERATURE (°C)
LTC1338 TPC05
LTC1338 TPC06
Driver Output Waveforms
DRIVER OUTPUT 2500pF DRIVER OUTPUT
Receiver Output Waveforms
RECEIVER OUTPUT 50pF
INPUT INPUT
LTC1338 TPC07
LTC1338
CTIO
DRIVER RS232 Driver Input Pins. Inputs TTL/ CMOS compatible. Inputs should allowed float. unused inputs VCC. DRIVER OUT: Driver Outputs RS232 Voltage Levels. Outputs high impedance state when SHUTDOWN, RECEIVER ALIVE mode driver outputs protected against ±10kV human body model discharges.
Table Functional Description
MODE SHUTDOWN Receiver Disable RECEIVER ALIVE Normal ENABLE ENABLE DRIVERS driver outputs high impedance. drivers alive. driver outputs high impedance. drivers alive. RECEIVERS receiver outputs high impedance. receiver outputs high impedance. receivers alive. receivers alive. (µA)(TYP)
SWITCHI WAVEFOR
DRIVER INPUT DRIVER OUTPUT 1.4V 1.4V
LTC1338
Figure Driver Propagation Delay Timing
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. Outputs high impedance state when SHUTDOWN RECEIVER DISABLE mode allow data line sharing.
INPUT OUTPUT
1.7V
1.3V 2.4V 0.8V
LTC1338
Figure Receiver Propagation Delay Timing
LTC1338 TEST CIRCUITS
Driver Timing Test Load Receiver Timing Test Load
DRIVER INPUT
DRIVER OUTPUT DRIVER 51pF
OUTPUT INPUT 51pF
LTC1338
LTC1338
Test Circuit
0.1µF 0.1µF DRIVER DRIVER RS232 LINE PINS PROTECTED ±10kV DRIVER DRIVER DRIVER ENABLE LTC1338 0.1µF DRIVER DRIVER DRIVER DRIVER DRIVER DRIVER ENABLE
LTC1338 TC01
0.1µF
LTC1338
PACKAGE DESCRIPTIO
0.0256 (0.65) 0.010 0.015 (0.25 0.38) *THESE DIMENSIONS INCLUDE MOLD FLASH PROTRUSIONS. MOLD FLASH PROTRUSIONS SHALL EXCEED 0.006 INCH (0.15mm).
Dimensions inches (millimeters) unless otherwise noted. Package 28-Lead SSOP
0.397 0.407* (10.07 10.33)
0.205 0.212* (5.20 5.38)
0.068 0.078 (1.73 1.99)
0.005 0.009 (0.13 0.22)
0.022 0.037 (0.55 0.95)
0.045 (1.14) 0.002 0.008 (0.05 0.21)
0.301 0.311 (7.65 7.90)
0.045 (1.14)
Package 28-Lead Plastic
0.070 (1.778) 1.455 (36.957)
0.600 0.625 (15.240 15.875)
0.130 0.005 (3.302 0.127) 0.015 (0.381)
0.045 0.065 (1.143 1.651)
0.009 0.015 (0.229 0.381)
0.505 0.560 (12.827 14.224) 0.125 (3.175) 0.035 0.080 (0.889 2.032) 0.100 0.010 (2.540 0.254) 0.018 0.003 (0.457 0.076)
+0.025 0.625 -0.015 +0.635 -0.381
15.87
Package 28-Lead
0.291 0.299 (7.391 7.595) (NOTE 0.697 0.712 (17.70 18.08) (NOTE
0.005 (0.127)
0.093 0.104 0.010 0.029 (2.362 2.642) (0.254 0.737) 0.050 (1.270)
0.037 0.045 (0.940 1.143)
0.009 0.013 (0.229 0.330) NOTE 0.016 0.050 (0.406 1.270)
0.014 0.019 (0.356 0.482)
0.004 0.012 (0.102 0.305)
NOTE
0.394 0.419 (10.007 10.643)
NOTE: IDENT, NOTCH CAVITIES BOTTOM PACKAGES MANUFACTURING OPTIONS. PART SUPPLIED WITH WITHOUT OPTIONS. THESE DIMENSIONS INCLUDE MOLD FLASH PROTRUSIONS. MOLD FLASH PROTRUSIONS SHALL EXCEED 0.006 INCH (0.15mm).
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.
LTC1338
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
08/16/93
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, 95035-7487
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977
LT/GP 1093 PRINTED
LINEAR TECHNOLOGY CORPORATION 1993

DESCRIPTIO Supply Current: 500µA 0.2µA Supply Current SHUTDOWN 50

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