DESCRIPTIO Supply Current: 300µA Supply Current SHUTDOWN Protecti
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LTC1337 Power RS232 3-Driver/5-Receiver Transceiver
DESCRIPTIO
Supply Current: 300µA Supply Current SHUTDOWN 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 Compatible with LT1137A LT1237 Flowthrough Architecture
LTC1337 3-driver/5-receiver RS232 transceiver with very supply current. load condition, supply current only 300µA. charge pump only requires four 0.1µF capacitors supply 12mA extra current power external circuitry. SHUTDOWN mode, supply current further reduced 1µA. RS232 outputs assume high impedance state SHUTDOWN with power off. LTC1337 fully compliant with data rate overvoltage RS232 specifications. transceiver operate 120k baud with 1000pF// load. Both driver outputs receiver inputs forced ±25V without damage, survive multiple ±10kV strikes.
APPLICATI
Notebook Computers Palmtop Computers
TYPICAL APPLICATI
3-Drivers/5-Receivers with SHUTDOWN
0.1µF 0.1µF DRIVER DRIVER DRIVER ON/OFF LTC1337
1337 TA01
0.1µF DRIVER DRIVER DRIVER
0.1µF
QUIESCENT CURRENT OPERATING (µA)
SHUTDOWN CURRENT
TEST CONDITION: DRIVER INPUTS TIED
1337 TA02
Supply Current
SHUTDOWN CURRENT (µA)
QUIESCENT CURRENT
TEMPERATURE (°C)
LTC1337 ABSOLUTE
(Note
RATI
PACKAGE/ORDER ATIO
VIEW
Supply Voltage (VCC) Input Voltage Driver 0.3V 0.3V Receiver On/Off Pin. 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 (LTC1337C) 70°C Storage Temperature Range 65°C 150°C Lead Temperature (Soldering, sec). 300°C
ORDER PART NUMBER LTC1337CG LTC1337CN LTC1337CS
ON/OFF
PACKAGE PACKAGE 28-LEAD SSOP 28-LEAD PLASTIC PACKAGE 28-LEAD PLASTIC
TJMAX 125°C, 96°C/W TJMAX 125°C, 56°C/W TJMAX 125°C, 85°C/W
Consult factory Industrial Military grade parts.
ELECTRICAL CHARACTERISTICS 0.1µF, unless otherwise noted.
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 CONDITIONS Input Level (VOUT High) Input High Level (VOUT Low) VOUT SHUTDOWN, VOUT ±20V (Note Input Threshold Input High Threshold Positive Negative
UNITS
Output Low, IOUT 1.6mA (VCC Output High, IOUT 160µA (VCC Sourcing Current, VOUT Sinking Current, VOUT SHUTDOWN, VOUT (Note
LTC1337
ELECTRICAL CHARACTERISTICS 0.1µF, unless otherwise noted.
PARAMETER Power Supply Generator Output Voltage Output Voltage Supply Rise Time Power Supply Supply Current Supply Leakage Current (VCC) On/Off Threshold On/Off Threshold High CONDITIONS IOUT IOUT 12mA IOUT IOUT 12mA SHUTDOWN Turn-On Load (Note SHUTDOWN (Note
UNITS
CHARACTERISTICS
PARAMETER Slew Rate Driver Propagation Delay (TTL RS232) Receiver Propagation Delay (RS232 TTL) CONDITIONS 51pF 2500pF (Figure (Figure (Figure (Figure
UNITS V/µs V/µs
denotes specifications which apply over operating temperature range (0°C 70°C). Note Absolute maximum ratings those values beyond which life device impaired.
Note Supply current measured with driver receiver outputs unloaded driver inputs tied high. Note Supply current leakage measurements SHUTDOWN performed with
TYPICAL PERFOR CHARACTERISTICS
Driver Output Voltage
DRIVER OUTPUT VOLTAGE
OUTPUT HIGH
THRESHOLD VOLTAGE
4.5V
SUPPLY CURRENT (mA)
OUTPUT 4.5V TEMPERATURE (°C)
1337
Receiver Input Thresholds
INPUT HIGH TEMPERATURE (°C) INPUT
Supply Current Data Rate
2500pF DRIVERS ACTIVE
DATA RATE BAUD)
1337
1337
LTC1337
TYPICAL PERFOR CHARACTERISTICS
Supply Current
DRIVERS LOADED
LEAKAGE CURRENT (µA)
SUPPLY CURRENT (mA)
VOUT VOUT -20V
SHORT-CIRCUIT CURRENT (mA)
DRIVER LOADED
TEMPERATURE (°C)
Receiver Short-Circuit Current
SHORT-CIRCUIT CURRENT (mA)
TEMPERATURE (°C)
ISC-
CTIO
VCC: Input Supply Pin. Supply current less than SHUTDOWN mode. This should decoupled with 0.1µF ceramic capacitor. GND: Ground Pin. ON/OFF: TTL/CMOS Compatible Shutdown Pin. logic puts device SHUTDOWN mode which reduces input supply current less than places drivers receivers high impedance state. 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
1337 1337
Driver Leakage SHUTDOWN
TEMPERATURE (°C)
Driver Short-Circuit Current
ISC- ISC+
TEMPERATURE (°C)
1337
1337
Driver Output Waveforms
DRIVER OUTPUT 2500pF DRIVER OUTPUT INPUT INPUT
Receiver Output Waveforms
OUTPUT 50pF
LTC1337
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 mode 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. Outputs high impedance state when SHUTDOWN mode allow data line sharing.
SWITCHI WAVEFOR
DRIVER INPUT DRIVER OUTPUT 1.4V 1.4V
1337
Figure Driver Propagation Delay Timing
TEST CIRCUITS
DRIVER INPUT DRIVER OUTPUT DRIVER 51pF
0.1µF
1337
Figure Driver Timing Test Load
RS232 LINE PINS PROTECTED ±10kV
OUTPUT 51pF
1337
Figure Receiver Timing Test Load
1.7V
1.3V 0.8V
1337
OUTPUT
Figure Receiver Propagation Delay Timing
Test Circuit
0.1µF DRIVER DRIVER DRIVER ON/OFF LTC1337
1337 TC01
0.1µF DRIVER DRIVER DRIVER 0.1µF
LTC1337
TYPICAL APPLICATI
Operation Using Power Supplies
LTC1337
1337 TA03
0.1µF DRIVER DRIVER DRIVER LOGIC
0.01µF 0.01µF
0.1µF
DRIVER DRIVER LINE DRIVER ON/0FF
Typical Mouse Driving Application
OPTICS 0.1µF DRIVER DRIVER LTC1337 0.1µF LOGIC LOGIC DRIVER DRIVER DRIVER
1137 TA04
MOUSE LOGIC 0.1µF
MOUSE DATA
DRIVER ON/OFF
LOGIC
0.1µF
LTC1337
PACKAGE DESCRIPTIO
Dimensions inches (millimeters) unless otherwise notes.
Package 28-Lead SSOP
0.397 0.407 (10.07 10.33) 0.205 0.212 (5.20 5.38) PARTING LINE 0.005 0.009 (0.13 0.22) 0.022 0.037 (0.55 0.95) 0.066 0.070 (1.68 1.78) 0.0256 (0.65) 0.010 0.015 (0.25 0.38) 0.045 (1.14) 0.002 0.008 (0.05 0.21)
0.068 0.078 (1.73 1.99)
0.301 0.311 (7.65 7.90)
0.045 (1.14)
Package 28-Lead Plastic
0.020 (0.508) 0.070 (1.778) 1.455 (36.957)
0.600 0.625 (15.240 15.875)
0.130 0.005 (3.302 0.127)
0.045 0.055 (1.143 1.651)
0.009 0.015 (0.229 0.381) +0.025 0.625 -0.015 +0.635 15.87 -0.381
0.020 (0.508)
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)
Package 28-Lead
0.291 0.299 (7.391 7.595) 0.005 (0.127) 0.010 0.029 (0.254 0.737) 0.050 0.014 0.019 0.009 0.013 (1.270) (0.356 0.482) (0.229 0.330) NOTE 0.016 0.050 (0.406 1.270) NOTE: IDENT, NOTCH CAVITIES BOTTOM PACKAGES MANUFACTURING OPTIONS. PART SUPPLIED WITH WITHOUT OPTIONS. NOTE 0.394 0.419 (10.007 10.643) 0.093 0.104 (2.362 2.642) 0.037 0.045 (0.940 1.143) 0.697 0.712 (17.70 18.08)
0.004 0.012 (0.102 0.305)
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.
LTC1337
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. 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
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, 95035-7487
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977
LT/GP 0893 PRINTED
LINEAR TECHNOLOGY CORPORATION 1993
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