DESCRIPTIO Operates from Single 3.3V Supply Supply Current: 200µA
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LTC1386 3.3V Power EIA/TIA562 Transceiver
DESCRIPTIO
Operates from Single 3.3V Supply Supply Current: 200µA Protection Over ±10kV Available 16-Pin SOIC Narrow Package Uses Small Capacitors: 0.1µF Operates 120kBaud Output Overvoltage Does Force Current Back into Supplies EIA/TIA562 Lines Forced ±25V Without Damage Compatible with LT1181A
LTC1386 ultra-low power 2-driver/2-receiver EIA/TIA562 transceiver that operates from single 3.3V supply. charge pump requires only four space-saving 0.1µF capacitors. supply current (ICC) transceiver only 200µA with driver outputs unloaded. LTC1386 fully compliant with data rate overvoltage EIA/TIA562 specifications. transceiver operate 120kbaud with 1000pF, load. Both driver outputs receiver inputs forced ±25V without damage survive multiple ±10kV strikes.
APPLICATIO
Notebook Computers Palmtop Computers
registered trademarks Linear Technology Corporation.
TYPICAL APPLICATIO
0.1µF 0.1µF 300k LOGIC INPUT LOGIC OUTPUT LTC1386 300k
Quiescent Supply Current Temperature
0.1µF 0.1µF
QUIESCENT CURRENT (µA)
3.3V
TEST CONDITION: 3.3V
LOGIC INPUT
OUTPUT
OUTPUT INPUT
LOGIC OUTPUT
INPUT
LTC1386 TA01
QUIESCENT CURRENT TEMPERATURE (°C)
LTC1386 TA02
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LTC1386
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 LTC1386C 70°C LTC1386I 40°C 85°C Storage Temperature Range 65°C 150°C Lead Temperature (Soldering, sec). 300°C
ORDER PART NUMBER
LTC1386CS LTC1386IS
PACKAGE 16-LEAD PLASTIC
TJMAX 125°C, 95°C/W
Consult Marketing parts specified with wider operating temperature ranges.
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 Power Supply Supply Current CONDITIONS
denotes specifications which apply over full operating temperature range. 3.3V, 0.1µF, unless otherwise noted.
Positive Negative
UNITS
Input Level (VOUT High) Input High Level (VOUT Low) VOUT Input Threshold Input High Threshold Output Low, IOUT 1.6mA (VCC 3.3V) Output High, IOUT 160µA (VCC 3.3V) Sinking Current, VOUT Sourcing Current, VOUT IOUT IOUT IOUT IOUT Load (Note 70°C Load (Note 40°C 85°C
0.35
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LTC1386
CHARACTERISTICS
PARAMETER Slew Rate Driver Propagation Delay (TTL EIA/TIA562) Receiver Propagation Delay (EIA/TIA562
denotes specifications which apply over full operating temperature range. 3.3V, 0.1µF, unless otherwise noted.
CONDITIONS 51pF 1000pF (Figure (Figure (Figure (Figure
UNITS V/µs V/µs
Note Absolute Maximum Ratings those values beyond which life device impaired. Note Supply current measured with driver receiver outputs unloaded.
Note Measurements made shutdown mode performed with VON/OFF=OV.
TYPICAL PERFOR CHARACTERISTICS
Driver Output Voltage Temperature
OUTPUT HIGH 3.3V
DRIVER OUTPUT VOLTAGE
THRESHOLD VOLTAGE
VTH+
DRIVERS WITH LOAD
SUPPLY CURRENT (mA)
OUTPUT 3.3V
TEMPERATURE (°C)
Supply Current Temperature
SUPPLY CURRENT (mA)
DRIVERS LOADED
DRIVER LOADED
TEMPERATURE (°C)
LTC1386 TPC04
LTC1386 TPC01
Receiver Input Thresholds Temperature
Supply Current Data Rate
3.3V 2500pF DRIVERS ACTIVE
VTH- TEMPERATURE (°C)
DATA RATE (kBAUD)
LTC1386 TPC02
LTC1386 TPC03
Driver Output Waveforms
DRIVER OUTPUT 1000pF DRIVER OUTPUT
Receiver Output Waveforms
RECEIVER OUTPUT 51pF
INPUT INPUT
LTC1386 TPC05 LTC1386 TPC06
5µs/DIV
5µs/DIV
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LTC1386
CTIO
VCC: 3.3V Input Supply Pin. This should decoupled with 0.1µF ceramic capacitor. GND: Ground Pin. Positive Supply Output (EIA/TIA562 Drivers). 2VCC 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 1.3V). 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 charge pump efficiency, capacitor's effective series resistance should less than EIA/TIA562 Driver Input Pins. Inputs TTL/ CMOS compatible. inputs unused drivers left unconnected since 300k input pull-up resistors included chip. OUT: Driver Outputs EIA/TIA562 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.
SWITCHI WAVEFOR
DRIVER INPUT DRIVER OUTPUT 1.4V 1.4V
LTC1386
Figure Driver Propagation Delay Timing
INPUT OUTPUT
1.7V
Figure Receiver Propagation Delay Timing
1.3V 2.4V 0.8V
LTC1386
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LTC1386
TEST CIRCUITS
Driver Timing Test Load Receiver Timing Test Load
DRIVER INPUT
DRIVER OUTPUT DRIVER 51pF
OUTPUT INPUT 51pF
LTC1386 TA04
LTC1386 TA03
Test Circuit
0.1µF 0.1µF LOGIC INPUT LOGIC INPUT LOGIC OUTPUT LOGIC OUTPUT 300k OUTPUT INPUT INPUT RS562 LINE PINS PROTECTED ±10kV 300k LTC1386 0.1µF OUTPUT 0.1µF
1386 TA05
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LTC1386
TYPICAL APPLICATIO
Paralleling Power Supply Generator with Common Storage Capacitors
0.1µF 0.1µF 300k LOGIC INPUT LOGIC OUTPUT LTC1386 300k
LOGIC INPUT
LOGIC OUTPUT
3.3V 0.1µF 0.1µF
0.1µF 0.1µF 300k LTC1386 300k
3.3V
OUTPUT
LOGIC INPUT
OUTPUT
OUTPUT INPUT
LOGIC INPUT LOGIC OUTPUT
OUTPUT INPUT
INPUT
LOGIC OUTPUT
INPUT
LTC1386 TA06
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LTC1386
PACKAGE DESCRIPTIO
Package 16-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference 05-08-1610)
.386 .394 (9.804 10.008) NOTE
.050
.245
.030 ±.005
RECOMMENDED SOLDER LAYOUT
.010 .020 (0.254 0.508)
.008 .010 (0.203 0.254)
.016 .050 (0.406 1.270)
NOTE: DIMENSIONS
INCHES (MILLIMETERS) DRAWING SCALE THESE DIMENSIONS INCLUDE MOLD FLASH PROTRUSIONS. MOLD FLASH PROTRUSIONS SHALL EXCEED .006" (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.
.045 ±.005 .160 ±.005 .228 .244 (5.791 6.197) .150 .157 (3.810 3.988) NOTE .053 .069 (1.346 1.752) .004 .010 (0.101 0.254) .014 .019 (0.355 0.483) .050 (1.270)
0502
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LTC1386
RELATED PARTS
PART NUMBER LT1780/LT1781 LTC1327 LTC1348 LTC1382 LTC1383 LTC1384 LTC1385 DESCRIPTION Driver, Receiver RS232 Transeivers 3.3V, Driver, Receiver RS562 Transceiver 3.3V Driver, Receiver RS232 Transceiver Driver, Receiver RS232 Transceiver Driver, Receiver RS232 Transceiver Driver, Receiver RS232 Transceiver 3.3V, Driver, Receiver RS562 Transceiver COMMENTS ±15kV 1000-4 300µA Supply Current, 0.2µA Shutdown True RS232 3.3V, Receivers Active Shutdown 220µA Supply Current, 0.2µA Shutdown 220µA Supply Current, Narrow 16-pin 220µA Supply Current, Receivers Active Shutdown 220µA Supply Current, Receivers Active Shutdown
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, 95035-7487
(408) 432-1900 FAX: (408) 434-0507 linear.com
LW/TP 1002 PRINTED
LINEAR TECHNOLOGY CORPORATION 1994
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