DESCRIPTIO Supply Current: 300µA Protection: Over ±10kV Supply Cu

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DESCRIPTIO Supply Current: 300µA Protection: Over ±10kV Supply Cu

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LTC1337 Power RS232 3-Driver/5-Receiver Transceiver
DESCRIPTIO
Supply Current: 300µA Protection: Over ±10kV Supply Current Shutdown 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 ®1137A 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.
registered trademarks Linear Technology Corporation.
APPLICATIO
Notebook Computers Palmtop Computers
TYPICAL APPLICATIO
0.1µF 0.1µF DRIVER DRIVER DRIVER ON/OFF LTC1337
3-Drivers/5-Receivers with Shutdown
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)
1337fa
LTC1337
ABSOLUTE
(Note
RATI
PACKAGE/ORDER ATIO
VIEW ON/OFF
Supply Voltage (VCC) Input Voltage Driver 0.3V 0.3V Receiver On/Off 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 LTC1337CNW LTC1337CSW
PACKAGE PACKAGE 28-LEAD PLASTIC SSOP 28-LEAD PDIP PACKAGE 28-LEAD PLASTIC TJMAX 125°C, 96°C/W TJMAX 125°C, 56°C/W (NW) TJMAX 125°C, 85°C/W (SW)
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 Output Leakage Current Receiver Input Voltage Thresholds Hysteresis Input Resistance Output Voltage Output Short-Circuit Current Output Leakage Current CONDITIONS
denotes specifications which apply over full operating temperature range. 0.1µF, unless otherwise noted.
Positive Negative
UNITS
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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 Sourcing Current, VOUT Sinking Current, VOUT Shutdown, VOUT (Note
LTC1337
ELECTRICAL CHARACTERISTICS
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
denotes specifications which apply over full operating temperature range. 0.1µF, unless otherwise noted.
UNITS
CHARACTERISTICS
PARAMETER Slew Rate Driver Propagation Delay (TTL RS232) Receiver Propagation Delay (RS232 TTL)
denotes specifications which apply over full operating temperature range. 0.1µF, unless otherwise noted.
CONDITIONS 51pF 2500pF (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 driver inputs tied high.
Note Supply current leakage measurements Shutdown performed with
TYPICAL PERFOR CHARACTERISTICS
Driver Output Voltage
DRIVER OUTPUT VOLTAGE TEMPERATURE (°C) OUTPUT 4.5V OUTPUT HIGH THRESHOLD VOLTAGE 4.5V
TEMPERATURE (°C) INPUT
SUPPLY CURRENT (mA)
1337
Receiver Input Thresholds
INPUT HIGH
Supply Current Data Rate
2500pF DRIVERS ACTIVE
DATA RATE BAUD)
1337
1337
1337fa
LTC1337 TYPICAL PERFOR CHARACTERISTICS
Supply Current
DRIVERS LOADED LEAKAGE CURRENT (µA) SUPPLY CURRENT (mA) TEMPERATURE (°C) DRIVER LOADED TEMPERATURE (°C) VOUT VOUT -20V SHORT-CIRCUIT CURRENT (mA)
Receiver Short-Circuit Current
SHORT-CIRCUIT CURRENT (mA) TEMPERATURE (°C) ISC+ 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. This cannot 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
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1337 1337
Driver Leakage Shutdown
Driver Short-Circuit Current
ISC- ISC+
TEMPERATURE (°C)
1337
1337
Driver Output Waveforms
DRIVER OUTPUT 2500pF DRIVER OUTPUT INPUT
Receiver Output Waveforms
OUTPUT 50pF
INPUT
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 OUTPUT DRIVER 51pF
0.1µF
1337
DRIVER INPUT
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
1337fa
LTC1337
TYPICAL APPLICATIO
Operation Using Power Supplies
LTC1337
1337 TA03
0.01µF 0.01µF
DRIVER DRIVER LINE DRIVER ON/0FF
DRIVER DRIVER LOGIC
Typical Mouse Driving Application
MOUSE LOGIC OPTICS 0.1µF 0.1µF DRIVER DRIVER LTC1337 0.1µF
DRIVER DRIVER DRIVER
LOGIC LOGIC
MOUSE DATA
DRIVER ON/OFF
LOGIC
1337 TA04
0.1µF DRIVER
0.1µF
0.1µF
1337fa
LTC1337
PACKAGE DESCRIPTIO
0.42 ±0.03 RECOMMENDED SOLDER LAYOUT 5.00 5.60** (.197 .221)
0.09 0.25 (.0035 .010)
0.55 0.95 (.022 .037)
NOTE: CONTROLLING DIMENSION: MILLIMETERS MILLIMETERS DIMENSIONS (INCHES) DRAWING SCALE *DIMENSIONS INCLUDE MOLD FLASH. MOLD FLASH SHALL EXCEED .152mm (.006") SIDE **DIMENSIONS INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL EXCEED .254mm (.010") SIDE
.600 .625 (15.240 15.875)
.008 .015 (0.203 0.381) +.035 .625 -.015
INCHES MILLIMETERS *THESE DIMENSIONS INCLUDE MOLD FLASH PROTRUSIONS. MOLD FLASH PROTRUSIONS SHALL EXCEED .010 INCH (0.254mm)
NOTE: DIMENSIONS
15.87
+0.889 -0.381
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.
Package 28-Lead Plastic SSOP (5.3mm)
(Reference 05-08-1640)
9.90 10.50* (.390 .413) 1.25 ±0.12 7.40 8.20 (.291 .323) 0.65 (.079)
0.65 (.0256)
0.22 0.38 (.009 .015)
0.05 (.002)
SSOP 0802
Package 28-Lead PDIP (Wide .600 Inch)
(Reference 05-08-1520)
1.467* (36.957)
.505 .560* (12.827 14.224)
.150 .005 (3.810 0.127) .015 (0.381)
.045 .065 (1.143 1.651)
.070 (1.778) .120 (3.175) .035 .080 (0.889 2.032) .100 (2.54) .018 .003 (0.457 0.076)
NW28 1002
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LTC1337
PACKAGE DESCRIPTIO
.030 ±.005
.050 .045 ±.005 .697 .712 (17.70 18.08) NOTE
.420
RECOMMENDED SOLDER LAYOUT .291 .299 (7.391 7.595) NOTE .010 .029 (0.254 0.737)
.005 (0.127)
.009 .013 (0.229 0.330)
NOTE .016 .050 (0.406 1.270)
NOTE: DIMENSIONS
INCHES (MILLIMETERS) DRAWING SCALE IDENT, NOTCH CAVITIES BOTTOM PACKAGES MANUFACTURING OPTIONS. PART SUPPLIED WITH WITHOUT OPTIONS THESE DIMENSIONS INCLUDE MOLD FLASH PROTRUSIONS. MOLD FLASH PROTRUSIONS SHALL EXCEED .006" (0.15mm)
RELATED PARTS
PART NUMBER LT1137A LTC1327 LTC1348 DESCRIPTION Driver, Receiver RS232 Transceiver 3.3V, Driver, Receiver RS562 Transceiver 3.3V Driver, Receiver RS232 Transceiver COMMENTS ±15kV 1000-4 300µA Supply Current, 0.2µA Shutdown True RS232 3.3V, Receivers Active Shutdown
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, 95035-7487
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
Package 28-Lead Plastic Small Outline (Wide .300 Inch)
(Reference 05-08-1620)
.325 ±.005 NOTE .394 .419 (10.007 10.643) .093 .104 (2.362 2.642) .037 .045 (0.940 1.143) .050 (1.270) .014 .019 (0.356 0.482) .004 .012 (0.102 0.305)
(WIDE) 0502
1337fa LW/TP 0103 PRINTED
LINEAR TECHNOLOGY CORPORATION 1993

DESCRIPTIO Supply Current: 300µA Protection: Over ±10kV Supply Cu

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