LTC1386

LTC1386 3.3V Low Power EIA/TIA562 Transceiver FEATURES s s s s s s s DESCRIPTIO s s Operates from a Single 3.3V Supply Low Supply Current: ICC = 200µA ESD Protection Over ±10kV Available in 16-Pin SOIC Narrow Package Uses Small Capacitors: 0.1µF Operates to 120kBaud Output Overvoltage Does Not Force Current Back into Supplies EIA/TIA562 I/O Lines Can Be Forced to ± 25V Without Damage Pin Compatible with LT1181A The LTC1386 is an ultra-low power 2-driver/2-receiver EIA/TIA562 transceiver that operates from a single 3.3V supply. The charge pump requires only four space-saving 0.1µF capacitors. The supply current (ICC) of the transceiver is only 200µA with driver outputs unloaded. The LTC1386 is fully compliant with all data rate and overvoltage EIA/TIA562 specifications. The transceiver can operate up to 120kbaud with a 1000pF, 3kΩ 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 1 0.1µF 3 4 0.1µF 5 11 VCC 300k LOGIC INPUT LOGIC OUTPUT 10 12 5k LTC1386 VCC 300k Quiescent Supply Current vs Temperature 16 2 6 0.1µF 14 QUIESCENT CURRENT (µA) 0.1µF 600 VCC = 3.3V 500 400 TEST CONDITION: VCC = 3.3V 300 200 100 0 –20 LOGIC INPUT 562 OUTPUT 7 13 562 OUTPUT 562 INPUT 0 LOGIC OUTPUT 9 5k 8 15 562 INPUT LTC1386 • TA01 U QUIESCENT CURRENT 20 40 TEMPERATURE (°C) 60 80 LTC1386 • TA02 UO UO 1 LTC1386 ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO TOP VIEW C1+ V+ C1– C2+ C2 – V– TR2 OUT RX2 IN 1 2 3 4 5 6 7 8 16 VCC 15 GND 14 TR1 OUT 13 RX1 IN 12 RX1 OUT 11 TR1 IN 10 TR2 IN 9 RX2 OUT Supply Voltage (VCC) ................................................ 5V Input Voltage Driver ....................................... – 0.3V to V CC + 0.3V Receiver ............................................... – 25V to 25V Digital Input ............................... – 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 .................... 0°C to 70°C Storage Temperature Range ................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C ORDER PART NUMBER LTC1386CN LTC1386CS N PACKAGE 16-LEAD PLASTIC DIP S PACKAGE 16-LEAD NARROW PLASTIC SOIC TJMAX = 125° C, θJA = 65°C/W (N) TJMAX = 125° C, θJA = 95°C/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 Any Receiver Input Voltage Thresholds Hysteresis Input Resistance Output Voltage Output Short-Circuit Current Power Supply Generator V + Output Voltage V – Output Voltage Power Supply VCC Supply Current CONDITIONS 3k to GND Input Low Level (VOUT = High) Input High Level (VOUT = Low) VIN = VCC VIN = 0V VOUT = 0V Input Low Threshold Input High Threshold VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted. MIN Positive Negative q q q q q q TYP 4.5 – 4.5 1.4 1.4 – 20 ±10 MAX UNITS V V V V µA µA mA V V V kΩ V V mA mA V V V V 3.7 – 3.7 2.0 0.8 5 – 40 q q q 0.8 0.1 3 3.0 –5 2 – 10V ≤ VIN ≤ 10V Output Low, IOUT = – 1.6mA (VCC = 3.3V) Output High, IOUT = 160µA (VCC = 3.3V) Sinking Current, VOUT = VCC Sourcing Current, VOUT = GND IOUT = 0mA IOUT = 5mA IOUT = 0mA IOUT = – 5mA No Load (Note 2) q q 1.3 1.7 0.4 5 0.2 3.2 – 20 7 5.7 5.5 – 5.3 – 5.0 2.4 1 7 0.4 q 0.2 0.5 2 U mA W U U WW W LTC1386 AC CHARACTERISTICS PARAMETER Slew Rate Driver Propagation Delay (TTL to EIA/TIA562) Receiver Propagation Delay (EIA/TIA562 to TTL ) VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted. CONDITIONS RL = 3k, CL = 51pF RL = 3k, CL = 1000pF 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 0.3 MAX 30 3.5 3.5 0.8 0.8 UNITS V/µs V/µs µs µs µs µs The q denotes specifications which apply over the operating temperature range of 0°C ≤ TA ≤ 70°C. 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. TYPICAL PERFORMANCE CHARACTERISTICS Driver Output Voltage vs Temperature 5 4 OUTPUT HIGH VCC = 3.3V THRESHOLD VOLTAGE (V) DRIVER OUTPUT VOLTAGE (V) 3 2 1 0 –1 –2 –3 –4 –5 0 10 1.8 1.6 1.4 VTH+ ALL DRIVERS WITH LOAD RL = 3k SUPPLY CURRENT (mA) OUTPUT LOW VCC = 3.3V 40 30 20 50 TEMPERATURE (°C) VCC Supply Current vs Temperature 4.5 4.0 SUPPLY CURRENT (mA) 3.5 3.0 2.5 2.0 1.5 1.0 2 DRIVERS LOADED RL = 3k 1 DRIVER LOADED RL = 3k 0.5 0 0 10 20 30 40 50 TEMPERATURE (°C) 60 70 LTC1386 • TPC04 UW 60 LTC1386 • TPC01 Receiver Input Thresholds vs Temperature 2.2 2.0 15 20 Supply Current vs Data Rate VCC = 3.3V RL = 3k CL = 2500pF ALL DRIVERS ACTIVE 10 VTH– 1.2 1.0 0 10 40 50 30 20 TEMPERATURE (˚C) 60 70 5 70 0 0 20 40 80 100 60 DATA RATE (kBAUD) 120 140 LTC1386 • TPC02 LTC1386 • TPC03 Driver Output Waveforms DRIVER OUTPUT RL = 3k CL = 1000pF DRIVER OUTPUT RL = 3k Receiver Output Waveforms RECEIVER OUTPUT CL = 51pF INPUT INPUT LTC1386 • TPC05 LTC1386 • TPC06 3 LTC1386 PI FU CTIO S VCC: 3.3V Input Supply Pin. This pin should be decoupled with a 0.1µF ceramic capacitor. GND: Ground Pin. Positive Supply Output (EIA/TIA562 Drivers). ≅ 2VCC – 1V. This pin requires an external capacitor C = 0.1µF for charge storage. The capacitor may be tied to ground or VCC. With multiple devices, the V + and V – pins may share a common capacitor. For large numbers of devices, increasing the size of the shared common storage capacitors is recommended to reduce ripple. V +: V+ V –: Negative Supply Output (RS232 Drivers). V – ≅ – (2VCC – 1.3V). This pin requires an external capacitor C = 0.1µF for charge storage. C1+, C1–, C2+, C2–: Commutating Capacitor Inputs. These pins require two external capacitors C = 0.1µF: 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 2Ω. TR IN: EIA/TIA562 Driver Input Pins. Inputs are TTL/ CMOS compatible. The inputs of unused drivers can be left unconnected since 300k input pull-up resistors to VCC are included on chip. TR OUT: Driver Outputs at EIA/TIA562 Voltage Levels. 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. SWITCHI G TI E WAVEFOR S DRIVER INPUT DRIVER OUTPUT t LHD VCC 1.4V 1.4V 0V V+ 0V t HLD LTC1386 • F01 Figure 1. Driver Propagation Delay Timing 4 W W U U U U RX INPUT RX OUTPUT t LHR 1.7V VCC 1.3V 0V 2.4V 0.8V t HLR VCC 0V LTC1386 • F02 0V V– Figure 2. Receiver Propagation Delay Timing LTC1386 TEST CIRCUITS Driver Timing Test Load DRIVER OUTPUT DRIVER 51pF 3k RX INPUT RX 51pF Receiver Timing Test Load DRIVER INPUT RX OUTPUT LTC1386 • TA04 LTC1386 • TA03 ESD Test Circuit 1 0.1µF 0.1µF LOGIC INPUT 3 4 5 VCC 11 VCC LOGIC INPUT LOGIC OUTPUT LOGIC OUTPUT 10 12 9 5k 5k 300k 7 13 8 562 OUTPUT 562 INPUT 562 INPUT RS562 LINE PINS PROTECTED TO ±10kV 300k 14 LTC1386 16 2 6 0.1µF 562 OUTPUT 0.1µF VCC 15 1386 TA05 5 LTC1386 TYPICAL APPLICATIONS N Paralleling Power Supply Generator with Common Storage Capacitors 1 0.1µF 3 4 0.1µF 5 11 VCC 300k LOGIC INPUT LOGIC OUTPUT 10 12 5k 9 5k LTC1386 VCC 300k LOGIC INPUT LOGIC OUTPUT 6 U 16 2 6 VCC = 3.3V 0.1µF 0.1µF 1 0.1µF 3 4 0.1µF 5 11 VCC 300k LTC1386 VCC 300k 16 2 6 VCC = 3.3V 14 562 OUTPUT LOGIC INPUT 14 562 OUTPUT 7 13 562 OUTPUT 562 INPUT LOGIC INPUT LOGIC OUTPUT 10 12 5k 9 5k 7 13 562 OUTPUT 562 INPUT 8 15 562 INPUT LOGIC OUTPUT 8 15 562 INPUT LTC1386 • TA06 LTC1386 PACKAGE DESCRIPTION U Dimensions in inches (millimeters) unless otherwise noted. N Package 16-Lead Plastic DIP 0.770 (19.558) MAX 16 15 14 13 12 11 10 9 0.260 ± 0.010 (6.604 ± 0.254) 1 0.300 – 0.325 (7.620 – 8.255) 0.130 ± 0.005 (3.302 ± 0.127) 2 3 4 5 6 7 8 0.045 – 0.065 (1.143 – 1.651) 0.009 – 0.015 (0.229 – 0.381) 0.015 (0.381) MIN 0.065 (1.651) TYP ( +0.025 0.325 –0.015 8.255 +0.635 –0.381 ) 0.125 (3.175) MIN 0.045 ± 0.015 (1.143 ± 0.381) 0.100 ± 0.010 (2.540 ± 0.254) 0.018 ± 0.003 (0.457 ± 0.076) N16 0492 S Package 16-Lead Plastic SOIC 0.386 – 0.394* (9.804 – 10.008) 16 15 14 13 12 11 10 9 0.228 – 0.244 (5.791 – 6.197) 0.150 – 0.157* (3.810 – 3.988) 1 0.010 – 0.020 × 45° (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0° – 8° TYP 0.053 – 0.069 (1.346 – 1.752) 2 3 4 5 6 7 8 0.004 – 0.010 (0.101 – 0.254) 0.016 – 0.050 0.406 – 1.270 0.014 – 0.019 (0.355 – 0.483) 0.050 (1.270) TYP SO16 0893 *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. 7 LTC1386 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 0294 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 © LINEAR TECHNOLOGY CORPORATION 1994