 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| LTC1347 5V Low Power RS232 3-Driver/5-Receiver Transceiver with 5 Receivers Active in Shutdown FEATURES s s s s s s s s DESCRIPTIO s s s Low Supply Current: 300A Five Receivers Kept Alive in Shutdown ESD Protection Over 10kV Operates from a Single 5V Supply Uses Small Capacitors: 0.1F Operates to 120kBaud Three-State Outputs Are High Impedance When Off Output Overvoltage Does Not Force Current Back into Supplies RS232 I/O Lines Can Be Forced to 25V Without Damage Pin Compatible with LT1137 and LT1237 Flowthrough Architecture The LTC1347 is a 3-driver/5-receiver RS232 transceiver with very low supply current. In the no load condition, the supply current is only 300A. The charge pump only requires four 0.1F capacitors. In Shutdown mode, all five receivers are kept alive and the supply current is 80A. All RS232 outputs assume a high impedance state in Shutdown and with the power off. The LTC1347 is fully compliant with all data rate and overvoltage RS232 specifications. The transceiver can operate up to 120kbaud with a 2500pF, 3k load. Both driver outputs and receiver inputs can be forced to 25V without damage, and can survive multiple 10kV ESD strikes. APPLICATI s s S Notebook Computers Palmtop Computers TYPICAL APPLICATI 3-Drivers/5-Receivers with SHUTDOWN V+ C1 0.1F C2 0.1F DRIVER 1 OUT RX1 IN DRIVER 2 OUT RX2 IN RX3 IN RX4 IN DRIVER 3 OUT RX5 IN ON/OFF NC VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 LTC1347 28 27 26 25 24 23 22 21 20 19 18 17 16 15 C3 0.1F DRIVER 1 IN RX1 OUT DRIVER 2 IN RX2 OUT RX3 OUT RX4 OUT DRIVER 3 IN RX5 OUT GND NC NC 1347 TA01 Quiescent and Shutdown Supply Current vs Temperature 1200 120 100 SHUTDOWN CURRENT (A) V- C4 0.1F 1000 QUIESCENT CURRENT (A) 800 600 400 200 0 -40 0 0 80 100 20 60 40 TEMPERATURE (C) TEST CONDITION: VCC = 5V, ALL DRIVER INPUTS TIED TO VCC. -20 1347 TA02 U SHUTDOWN CURRENT 80 60 QUIESCENT CURRENT 40 20 UO UO 1 LTC1347 ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO TOP VIEW V+ C1+ C1- 1 3 4 28 V - 27 C2 + 26 C2 - 25 DRIVER 1 IN 24 RX1 OUT 23 DRIVER 2 IN 22 RX2 OUT 21 RX3 OUT 20 RX4 OUT 19 DRIVER 3 IN 18 RX5 OUT 17 GND 16 NC 15 NC VCC 2 Supply Voltage (VCC) ................................................ 6V Input Voltage Driver ....................................... - 0.3V to V CC + 0.3V Receiver ............................................... - 25V to 25V On/Off Pin .................................. - 0.3V to VCC + 0.3V Output Voltage Driver .................................................... - 25V to 25V Receiver .................................... - 0.3V to VCC + 0.3V Short-Circuit Duration V + ................................................................... 30 sec V - ................................................................... 30 sec Driver Output .............................................. Indefinite Receiver Output .......................................... Indefinite Operating Temperature Range .................... 0C to 70C Storage Temperature Range ................ - 65C to 150C Lead Temperature (Soldering, 10 sec)................. 300C ORDER PART NUMBER LTC1347CG LTC1347CN LTC1347CS DRIVER 1 OUT 5 RX1 IN 6 DRIVER 2 OUT 7 RX2 IN 8 RX3 IN 9 RX4 IN 10 DRIVER 3 OUT 11 RX5 IN 12 ON/OFF 13 NC 14 N PACKAGE G PACKAGE 28-LEAD PLASTIC DIP 28-LEAD SSOP S PACKAGE 28-LEAD PLASTIC SOL TJMAX = 125C, JA = 96C/W (G) TJMAX = 125C, JA = 56C/W (N) TJMAX = 125C, JA = 85C/W (S) Consult factory for Industrial and Military grade parts. DC ELECTRICAL CHARACTERISTICS PARAMETER Any Driver Output Voltage Swing Logic Input Voltage Level Logic Input Current Output Short-Circuit Current Output Leakage Current Any Receiver Input Voltage Thresholds Hysteresis Input Resistance Output Voltage Output Short-Circuit Current CONDITIONS 3k to GND VCC = 5V, C1 = C2 = C3 = C4 = 0.1F, unless otherwise noted. MIN Positive Negative q q q q q q TYP 7.0 - 6.5 1.4 1.4 MAX UNITS V V V V A A mA A V V V k V V mA mA 5.0 - 5.0 2.0 Input Low Level (VOUT = High) Input High Level (VOUT = Low) VIN = 5V VIN = 0V VOUT = 0V Shutdown, VOUT = 20V (Note 3) Input Low Threshold Input High Threshold VIN = 10V Output Low, IOUT = - 1.6mA (VCC = 5V) Output High, IOUT = 160A (VCC = 5V) Sinking Current, VOUT = VCC Sourcing Current, VOUT = 0V 0.8 5 -5 12 10 q q q q q 500 0.8 0.1 3 3.5 - 15 10 1.3 1.7 0.4 5 0.2 4.8 - 40 20 2.4 1.0 7 0.4 2 U W U U WW W LTC1347 DC ELECTRICAL CHARACTERISTICS VCC = 5V, C1 = C2 = C3 = C4 = 0.1F, unless otherwise noted. PARAMETER Power Supply Generator V + Output Voltage V - Output Voltage Supply Rise Time Power Supply VCC Supply Current CONDITIONS IOUT = 0mA IOUT = 12mA IOUT = 0mA IOUT = - 12mA Shutdown to Turn-On MIN TYP 8.0 7.5 - 8.0 - 7.0 0.2 MAX UNITS V V V V ms No Load (All Drivers VIN = 5V)(Note 2) No Load (All Drivers VIN = 0V) (Note 2) Shutdown (Note 3) q q q q q On/Off Threshold Low On/Off Threshold High 2.0 0.6 0.8 80.0 1.4 1.4 1.1 1.3 120.0 0.8 mA mA A V V AC CHARACTERISTICS VCC = 5V, C1 = C2 = C3 = C4 = 0.1F, unless otherwise noted. PARAMETER Slew Rate Driver Propagation Delay (TTL to RS232) Receiver Propagation Delay (RS232 to TTL) CONDITIONS RL = 3k, CL = 51pF RL = 3k, CL = 2500pF t HLD (Figure 1) t LHD (Figure 1) t HLR (Figure 2) t LHR (Figure 2) MIN 3 q q q q TYP 8 5 2 2 0.3 0.2 MAX 30 3.5 3.5 0.8 0.8 UNITS V/s V/s s s s s The q denotes specifications which apply over the operating temperature range (0C TA 70C for commercial grade. Note 1: Absolute maximum ratings are those values beyond which the life of the device may be impaired. Note 2: Supply current is measured with driver and receiver outputs unloaded. Note 3: Supply current and leakage current measurements in Shutdown are performed with VON/OFF = 0V. TYPICAL PERFORMANCE CHARACTERISTICS Driver Output Voltage 10 8 DRIVER OUTPUT VOLTAGE (V) RL = 3k OUTPUT HIGH VCC = 5V THRESHOLD VOLTAGE (V) VCC = 4.5V SUPPLY CURRENT (mA) 6 4 2 0 -2 -4 -6 OUTPUT LOW VCC = 4.5V VCC = 5V -8 -40 -20 20 0 60 40 TEMPERATURE (C) UW 80 1347 G01 Receiver Input Thresholds 2.2 2.0 1.8 VTH 1.6 VTL 1.4 1.2 5 45 40 35 30 25 20 15 10 Supply Current vs Data Rate VCC = 5V RL = 3k CL = 2500pF 3 DRIVERS ACTIVE 100 1.0 -40 -20 0 40 20 60 0 TEMPERATURE (C) 80 100 0 25 75 100 125 50 DATA RATE (kBAUD) 150 175 1347 G02 1347 G03 3 LTC1347 TYPICAL PERFORMANCE CHARACTERISTICS VCC Supply Current 20 16 3 DRIVERS LOADED RL = 3k LEAKAGE CURRENT (A) SUPPLY CURRENT (mA) 45 40 35 30 25 20 15 10 5 0 VOUT = 20V VOUT = -20V SHORT-CIRCUIT CURRENT (mA) 14 12 10 8 6 4 2 0 0 10 1 DRIVER LOADED RL = 3k 30 20 40 50 TEMPERATURE (C) Receiver Short-Circuit Current 60 SHORT-CIRCUIT CURRENT (mA) 50 40 ISC- 30 ISC+ 20 10 -40 -20 40 20 0 60 TEMPERATURE (C) PI FU CTIO S VCC: 5V Input Supply Pin. Supply current is typically 80A in the Shutdown mode. This pin should be decoupled with a 0.1F ceramic capacitor. GND: Ground Pin. ON/OFF: TTL/CMOS Compatible Shutdown Pin. A logic low puts the device in the shutdown mode with all receivers kept alive, and the supply current is 80A. All driver outputs are in high impedance state. This pin cannot float. V + : Positive Supply Output (RS232 Drivers). V + 2VCC - 1V. This pin requires an external capacitor C = 0.1F for charge storage. The capacitor may be tied to ground or VCC. With multiple devices, the V + and V - pins may be paralleled into common capacitors. For large numbers of devices, increasing the size of the shared common storage capacitors is recommended to reduce ripple. V - : Negative Supply Output (RS232 Drivers). V - - (2VCC - 1.5V). This pin requires an external capacitor C = 0.1F for charge storage. 4 UW 60 1347 G04 Driver Leakage in Shutdown 20 18 16 14 12 10 8 6 4 60 70 Driver Short-Circuit Current ISC- ISC+ 70 0 10 30 20 40 50 TEMPERATURE (C) 0 -40 -20 0 20 60 40 TEMPERATURE (C) 80 100 1347 G05 1347 G06 Driver Output Waveforms DRIVER OUTPUT RL = 3k CL = 2500pF DRIVER OUTPUT RL = 3k INPUT Receiver Output Waveforms RECEIVER OUTPUT CL = 51pF INPUT 1347 G08 1347 G09 80 100 1347 G07 U U U LTC1347 PI FU CTIO S C1+, C1-, C2+, C2-: Commutating Capacitor Inputs. These pins require two external capacitors C = 0.1F: one from C1+ to C1-, and another from C2+ to C2-. To maintain charge pump efficiency, the capacitor's effective series resistance should be less than 2. DRIVER IN: RS232 Driver Input Pins. Inputs are TTL/ CMOS compatible. Inputs should not be allowed to float. Tie unused inputs to VCC. DRIVER OUT: Driver Outputs at RS232 Voltage Levels. Outputs are in a high impedance state when in shutdown mode or VCC = 0V. The driver outputs are protected against ESD to 10kV for human body model discharges. RX IN: Receiver Inputs. These pins can be forced to 25V without damage. The receiver inputs are protected against ESD to 10kV for human body model discharges. Each receiver provides 0.4V of hysteresis for noise immunity. RX OUT: Receiver Outputs with TTL/CMOS Voltage Levels. All receivers are kept alive in shutdown. SWITCHI G TI E WAVEFOR S DRIVER INPUT DRIVER OUTPUT t LHD VCC 1.4V 1.4V 0V V+ 0V t HLD 1347 F01 Figure 1. Driver Propagation Delay Timing RX INPUT RX OUTPUT t LHR 1.7V Figure 2. Receiver Propagation Delay Timing W W U U U U 0V V- VCC 1.3V 0V 2.4V 0.8V t HLR VCC 0V 1347 F02 5 LTC1347 TEST CIRCUITS DRIVER INPUT DRIVER OUTPUT DRIVER 51pF 3k RX INPUT RX RX OUTPUT 51pF 1347 F03 1347 F04 Figure 3. Driver Timing Test Load Figure 4. Receiver Timing Test Load V+ C1 0.1F C2 0.1F DRIVER 1 OUT RX1 IN RS232 LINE PINS PROTECTED TO 10kV DRIVER 2 OUT RX2 IN RX3 IN RX4 IN DRIVER 3 OUT RX5 IN ON/OFF NC VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 LTC1347 28 27 26 25 24 23 22 21 20 19 18 17 16 15 V- C3 0.1F DRIVER 1 IN RX1 OUT DRIVER 2 IN RX2 OUT RX3 OUT RX4 OUT DRIVER 3 IN RX5 OUT GND NC NC 1347 TC01 C4 0.1F Figure 5. ESD Test Circuit 6 LTC1347 PACKAGE DESCRIPTION 0.205 - 0.212* (5.20 - 5.38) 0 - 8 0.005 - 0.009 (0.13 - 0.22) 0.022 - 0.037 (0.55 - 0.95) 0.0256 (0.65) BSC 0.010 - 0.015 (0.25 - 0.38) *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm). 0.045 (1.14) 0.002 - 0.008 (0.05 - 0.21) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 0.600 - 0.625 (15.240 - 15.875) 0.130 0.005 (3.302 0.127) 0.015 (0.381) MIN 0.009 - 0.015 (0.229 - 0.381) ( +0.025 0.625 -0.015 +0.635 15.87 -0.381 ) 0.125 (3.175) MIN 0.035 - 0.080 (0.889 - 2.032) 0.100 0.010 (2.540 0.254) 0.005 (0.127) RAD MIN 0.291 - 0.299 (7.391 - 7.595) (NOTE 2) 0.093 - 0.104 0.010 - 0.029 x 45 (2.362 - 2.642) (0.254 - 0.737) 0 - 8 TYP 0.050 (1.270) TYP 0.009 - 0.013 (0.229 - 0.330) NOTE 1 0.016 - 0.050 (0.406 - 1.270) NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS. 2. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm). Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. U Dimensions in inches (millimeters) unltess otherwise noted. G Package 28-Lead SSOP 0.397 - 0.407* (10.07 - 10.33) 0.068 - 0.078 (1.73 - 1.99) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 0.301 - 0.311 (7.65 - 7.90) 0.045 (1.14) N Package 28-Lead Plastic DIP 0.070 (1.778) TYP 28 27 26 25 24 23 1.455 (36.957) MAX 22 21 20 19 18 17 16 15 0.045 - 0.065 (1.143 - 1.651) 0.505 - 0.560 (12.827 - 14.224) 0.018 0.003 (0.457 0.076) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 S Package 28-Lead Plastic SOL 0.697 - 0.712 (17.70 - 18.08) (NOTE 2) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 0.037 - 0.045 (0.940 - 1.143) 0.014 - 0.019 (0.356 - 0.482) 0.004 - 0.012 (0.102 - 0.305) NOTE 1 0.394 - 0.419 (10.007 - 10.643) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 7 LTC1347 U.S. Area Sales Offices NORTHEAST REGION Linear Technology Corporation One Oxford Valley 2300 E. Lincoln Hwy.,Suite 306 Langhorne, PA 19047 Phone: (215) 757-8578 FAX: (215) 757-5631 Linear Technology Corporation 266 Lowell St., Suite B-8 Wilmington, MA 01887 Phone: (508) 658-3881 FAX: (508) 658-2701 SOUTHEAST REGION Linear Technology Corporation 17060 Dallas Parkway Suite 208 Dallas, TX 75248 Phone: (214) 733-3071 FAX: (214) 380-5138 CENTRAL REGION Linear Technology Corporation Chesapeake Square 229 Mitchell Court, Suite A-25 Addison, IL 60101 Phone: (708) 620-6910 FAX: (708) 620-6977 SOUTHWEST REGION Linear Technology Corporation 22141 Ventura Blvd. Suite 206 Woodland Hills, CA 91364 Phone: (818) 703-0835 FAX: (818) 703-0517 NORTHWEST REGION Linear Technology Corporation 782 Sycamore Dr. Milpitas, CA 95035 Phone: (408) 428-2050 FAX: (408) 432-6331 International Sales Offices FRANCE Linear Technology S.A.R.L. Immeuble "Le Quartz" 58 Chemin de la Justice 92290 Chatenay Malabry France Phone: 33-1-41079555 FAX: 33-1-46314613 GERMANY Linear Techonolgy GmbH Untere Hauptstr. 9 D-85386 Eching Germany Phone: 49-89-3197410 FAX: 49-89-3194821 JAPAN Linear Technology KK 5F YZ Bldg. 4-4-12 Iidabashi, Chiyoda-Ku Tokyo, 102 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. 101 Boon Keng Road #02-15 Kallang Ind. Estates Singapore 1233 Phone: 65-293-5322 FAX: 65-292-0398 TAIWAN Linear Technology Corporation Rm. 801, No. 46, Sec. 2 Chung Shan N. Rd. Taipei, Taiwan, R.O.C. Phone: 886-2-521-7575 FAX: 886-2-562-2285 UNITED KINGDOM Linear Technology (UK) Ltd. The Coliseum, Riverside Way Camberley, Surrey GU15 3YL United Kingdom Phone: 44-276-677676 FAX: 44-276-64851 World Headquarters Linear Technology Corporation 1630 McCarthy Blvd. Milpitas, CA 95035-7487 Phone: (408) 432-1900 FAX: (408) 434-0507 8 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7487 (408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977 LT/GP 0594 10K * PRINTED IN USA (c) LINEAR TECHNOLOGY CORPORATION 1994 |
Price & Availability of LTC1347
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |