DESCRIPTIO Supply Current: 300µA Five Receivers Kept Alive Shutdo

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

DESCRIPTIO Supply Current: 300µA Five Receivers Kept Alive Shutdo

Datasheet Thumbnail

Top Searches for this datasheet

LTC1347 Power RS232 3-Driver/5-Receiver Transceiver with Receivers Active Shutdown
DESCRIPTIO
Supply Current: 300µA Five Receivers Kept Alive Shutdown Protection Over ±10kV Operates from Single Supply Uses Small Capacitors: 0.1µF Operates 120kBaud 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
LTC1347 3-driver/5-receiver RS232 transceiver with very supply current. load condition, supply current only 300µA. charge pump only requires four 0.1µF capacitors. Shutdown mode, five receivers kept alive supply current 80µA. RS232 outputs assume high impedance state Shutdown with power off. LTC1347 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.
APPLICATIO
Notebook Computers Palmtop Computers
registered trademarks Linear Technology Corporation.
TYPICAL APPLICATIO
0.1µF 0.1µF DRIVER DRIVER DRIVER ON/OFF
3-Drivers/5-Receivers with Shutdown
LTC1347 0.1µF DRIVER DRIVER DRIVER
1347 TA01
Quiescent Shutdown Supply Current Temperature
1200 SHUTDOWN CURRENT (µA) SHUTDOWN CURRENT QUIESCENT CURRENT
0.1µF
1000 QUIESCENT CURRENT (µA)
TEMPERATURE (°C) TEST CONDITION: DRIVER INPUTS TIED VCC.
1347 TA02
1347fa
LTC1347
ABSOLUTE
RATI
PACKAGE/ORDER ATIO
VIEW PACKAGE 28-LEAD PDIP ON/OFF PACKAGE 28-LEAD SSOP
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 70°C Storage Temperature Range 65°C 150°C Lead Temperature (Soldering, sec). 300°C
ORDER PART NUMBER LTC1347CG LTC1347CNW LTC1347CSW
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 CONDITIONS
denotes specifications which apply over full operating temperature range. 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 ±10V Output Low, IOUT 1.6mA (VCC Output High, IOUT 160µA (VCC Sinking Current, VOUT Sourcing Current, VOUT
±500
1347fa
LTC1347
ELECTRICAL CHARACTERISTICS
PARAMETER Power Supply Generator Output Voltage Output Voltage Supply Rise Time Power Supply Supply Current CONDITIONS IOUT IOUT 12mA IOUT IOUT 12mA Shutdown Turn-On
denotes specifications which apply over full operating temperature range. 0.1µF, unless otherwise noted.
UNITS
Load (All Drivers 5V)(Note Load (All Drivers (Note Shutdown (Note
On/Off Threshold On/Off Threshold High
80.0
120.0
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.
Note Supply current leakage current measurements Shutdown performed with VON/OFF
TYPICAL PERFOR CHARACTERISTICS
Driver Output Voltage
OUTPUT HIGH
DRIVER OUTPUT VOLTAGE
THRESHOLD VOLTAGE
SUPPLY CURRENT (mA)
4.5V
OUTPUT 4.5V
TEMPERATURE (°C)
1347
Receiver Input Thresholds
Supply Current Data Rate
2500pF DRIVERS ACTIVE
TEMPERATURE (°C)
DATA RATE (kBAUD)
1347
1347
1347fa
LTC1347 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)
ISC-
ISC+
1347 1347
TEMPERATURE (°C)
CTIO
VCC: Input Supply Pin. Supply current typically 80µA 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 with receivers kept alive, supply current 80µA. driver outputs high impedance state. This cannot float. Positive Supply Output (RS232 Drivers). 2VCC This requires external capacitor 0.1µF charge storage. capacitor tied ground VCC. 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
1347fa
1347
Driver Leakage Shutdown
Driver Short-Circuit Current
ISC- ISC+
TEMPERATURE (°C)
1347
1347
Driver Output Waveforms
DRIVER OUTPUT 2500pF DRIVER OUTPUT INPUT
Receiver Output Waveforms
RECEIVER OUTPUT 51pF
INPUT
1347
LTC1347
CTIO
charge pump efficiency, capacitor's effective series resistance should less than 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. receivers kept alive Shutdown.
SWITCHI WAVEFOR
DRIVER INPUT DRIVER OUTPUT 1.4V 1.4V
1347
Figure Driver Propagation Delay Timing
INPUT OUTPUT
1.7V
Figure Receiver Propagation Delay Timing
1.3V 2.4V 0.8V
1347
1347fa
LTC1347
TEST CIRCUITS
DRIVER INPUT
DRIVER OUTPUT DRIVER 51pF
INPUT
OUTPUT 51pF
1347
1347
Figure Driver Timing Test Load
Figure Receiver Timing Test Load
0.1µF 0.1µF DRIVER RS232 LINE PINS PROTECTED ±10kV DRIVER DRIVER ON/OFF
LTC1347
0.1µF DRIVER DRIVER DRIVER
1347 TC01
0.1µF
Figure Test Circuit
1347fa
LTC1347
PACKAGE DESCRIPTIO
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)
0.42 ±0.03 RECOMMENDED SOLDER LAYOUT 5.00 5.60** (.197 .221)
0.09 0.25 (.0035 .010)
0.55 0.95 (.022 .037)
0.65 (.0256)
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
0.22 0.38 (.009 .015)
0.05 (.002)
SSOP 0802
Package 28-Lead PDIP (Wide .600 Inch)
(Reference 05-08-1520)
1.455* (36.957)
.505 .560* (12.827 14.224)
.600 .625 (15.240 15.875) .150 .005 (3.810 0.127) .015 (0.381)
.045 .065 (1.143 1.651)
.009 .015 (0.229 0.381) +.035 .625 -.015
.070 (1.778) .125 (3.175) .035 .080 (0.889 2.032) .100 (2.54) .018 .003 (0.457 0.076)
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
NW28 0502
1347fa
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.
LTC1347
PACKAGE DESCRIPTIO
Package 28-Lead Plastic Small Outline (Wide .300 Inch)
(Reference 05-08-1620)
.030 ±.005 .050 .045 ±.005 .697 .712 (17.70 18.08) NOTE .420 .325 ±.005 NOTE .394 .419 (10.007 10.643) RECOMMENDED SOLDER LAYOUT .291 .299 (7.391 7.595) NOTE .010 .029 (0.254 0.737)
.093 .104 (2.362 2.642)
.037 .045 (0.940 1.143)
.005 (0.127)
.009 .013 (0.229 0.330)
NOTE .016 .050 (0.406 1.270)
.050 (1.270)
NOTE: DIMENSIONS
.014 .019 (0.356 0.482)
.004 .012 (0.102 0.305)
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)
(WIDE) 0502
RELATED PARTS
PART NUMBER LT1137A LTC1327 LTC1337 LTC1348 DESCRIPTION Driver, Receiver RS232 Transceiver 3.3V, Driver, Receiver RS562 Transceiver Driver, Receiver RS232 Transceiver 3.3V Driver, Receiver RS232 Transceiver COMMENTS ±15kV 1000-4 300µA Supply Current, 0.2µA Shutdown 300µA Supply Current, Shutdown True RS232 3.3V, Receivers Active Shutdown
1347fa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, 95035-7487
(408) 432-1900 FAX: (408) 434-0507
LW/TP 1002 PRINTED
WWW.linear.com
LINEAR TECHNOLOGY CORPORATION 1994

DESCRIPTIO Supply Current: 300µA Five Receivers Kept Alive Shutdo

Top Searches for this datasheet

Other recent searches