LTC1327CSW

LTC1327 3.3V Micropower EIA/TIA-562 Transceiver U DESCRIPTIO FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Low Supply Current 300µA 0.2µA Supply Current in SHUTDOWN ESD Protection ±10kV Operates From a Single 3.3V Supply Uses Small Capacitors 0.1µF Operates To 120k Baud Three-State Outputs are High Impedance When Off Output Overvoltage Does Not Force Current Back Into Supplies EIA/TIA-562 I/O Lines Can Be Forced to ±25V Without Damage Flowthrough Architecture UO APPLICATI ■ ■ S The LTC1327 is an advanced low power, three-driver/fivereceiver EIA/TIA-562 transceiver. In the no load condition, the supply current is only 300µA. The charge pump only requires four 0.1µF capacitors. In SHUTDOWN mode, the supply current is further reduced to 0.2µA. All EIA/TIA-562 outputs assume a high impedance state in SHUTDOWN and with the power off. The LTC1327 is fully compliant with all data rate and overvoltage EIA/TIA-562 specifications. The transceiver can operate up to 120k Baud 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. Notebook Computers Palmtop Computers UO TYPICAL APPLICATI 3-Drivers/5-Receivers with SHUTDOWN C1 0.1µF C2 0.1µF DR1 OUT RX1 IN DR2 OUT RX2 IN RX3 IN RX4 IN DR4 OUT RX5 IN ON/OFF 2 LTC1327 600 V– 27 3 26 4 25 5 24 6 23 7 22 8 21 9 20 10 19 11 18 12 17 13 16 14 15 C3 0.1µF C4 0.1µF 500 DR1 IN RX1 OUT DR2 IN RX2 OUT RX3 OUT RX4 OUT 1.2 VCC = 3.3V ALL DRIVERS INPUTS TIED TO VCC 400 1.0 0.8 QUIESCENT CURRENT 300 0.6 SHUTDOWN CURRENT 200 0.4 100 SHUTDOWN CURRENT (µA) VCC 28 1 QUIESCENT CURRENT (µA) V+ Supply Current vs Temperature 0.2 DR3 IN RX5 OUT 0 GND –20 0 20 40 60 TEMPERATURE (°C) 80 LTC1327 • TA02 1327 TA01 1 LTC1327 ABSOLUTE W W W U AXI U RATI GS U W U PACKAGE/ORDER I FOR ATIO Supply Voltage (VCC) ................................................. 5V Input Voltage Driver ...................................... – 0.3V to (VCC + 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 Commercial LTC1327C .......................... 0°C to 70°C Storage Temperature Range ................. – 65°c to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C TOP VIEW V+ 1 28 V– VCC 2 27 C2 + C1+ 3 26 C2 – C1– 4 25 DR1 IN DR1 OUT 5 ORDER PART NUMBER LTC1327CG LTC1327CN LTC1327CS 24 RX1 OUT RX1 IN 6 23 DR2 IN DR2 OUT 7 22 RX2 OUT RX2 IN 8 21 RX3 OUT RX3 IN 9 20 RX4 OUT RX4 IN 10 19 DR3 IN DR3 OUT 11 18 RX5 OUT RX5 IN 12 17 GND ON/OFF 13 16 NC NC 14 15 NC G PACKAGE 28-LEAD SSOP N PACKAGE 28-LEAD PLASTIC DIP S PACKAGE 28-LEAD PLASTIC SOL TJMAX = 125°C, θJA = 96°C/ W (G) TJMAX = 125°C, θJA = 56°C/ W (N) TJMAX = 125°C, θJA = 85°C/ W (S) Consult factory for Industrial and Military grade parts. DC ELECTRICAL CHARACTERISTICS PARAMETER VCC = 3.3V, C1 to C4 = 0.1µF, unless otherwise noted. CONDITIONS MIN TYP MAX UNITS Any Driver Output Voltage Swing Positive Negative (3k to GND) ● ● 3.7 – 3.7 4.5 – 4.5 V V Logic Input Voltage Level Input Low Level (VOUT = High) Input High Level (VOUT = Low) ● ● 2 1.4 1.4 Logic Input Current VIN = 3.3 VIN = 0 ● ● Output Short-Circuit Current VOUT = 0V ±7 Output Leakage Current SHUTDOWN (Note 3), VOUT = ±20V ±10 ±500 µA 1.3 1.7 2.4 V V 0.8 5 –5 V V µA µA mA Any Receiver Input Voltage Thresholds Input Low Threshold Input High Threshold Hysteresis Input Resistance VIN = ±10V Output Voltage Output Low, IOUT = – 1.6mA (VCC = 3.3V) Output High, IOUT = 160µA (VCC = 3.3V) Output Short-Circuit Current Sinking Current, VOUT = VCC Output Leakage Current SHUTDOWN (Note 3), 0 ≤ VOUT ≤ VCC 2 ● ● 0.8 ● 0.1 0.4 1 V 3 5 7 kΩ 0.2 3.2 0.4 3 –2 – 10 ● ● ● 1 V V mA 10 µA LTC1327 DC ELECTRICAL CHARACTERISTICS PARAMETER VCC = 3.3V, C1 to C4 = 0.1µF, unless otherwise noted. CONDITIONS MIN TYP MAX UNITS Power Supply Generator V + Output Voltage IOUT = 0mA IOUT = 5mA 5.7 5.5 V V V – Output Voltage IOUT = 0mA IOUT = – 5mA – 5.3 – 5.0 V V Supply Rise Time SHUTDOWN to Turn-On 0.2 ms Power Supply VCC Supply Current No Load (Note 2) ● 0.3 0.5 mA Supply Leakage Current (VCC) SHUTDOWN (Note 3) ● 0.2 10 µA 1.4 0.8 On/Off Threshold Low ● On/Off Threshold High ● V 2 1.4 V 6 5 30 3 V/µs V/µs AC CHARACTERISTICS Slew Rate RL = 3k, CL = 51pF RL = 3k, CL = 1000pF Driver Propagation Delay (TTL to EIA/TIA-562) tHLD tLHD ● ● 2 2 3.5 3.5 µs µs Receiver Propagation Delay (EIA/TIA-562 to TTL) tHLR tLHR ● ● 0.3 0.2 0.8 0.8 µs µs The ● denotes specifications which apply over the operating temperature (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 output unloaded and driver inputs tied high. Note 3: Supply current measurement in SHUTDOWN mode is performed with VON/OFF = 0V. U W TYPICAL PERFOR A CE CHARACTERISTICS Driver Output Voltage vs Temperature Receiver Input Thresholds vs Temperature 5 2.0 THRESHOLD VOLTAGE (V) 3 2 1 ALL DRIVERS WITH LOAD RL = 3k 0 –1 –2 VCC = 3.3V OUTPUT LOW –3 –4 10 40 30 20 50 TEMPERATURE (°C) 1.8 VTH+ 1.6 VTH– 1.4 1.2 –5 0 VCC = 3.3V RL = 3k CL = 1000pF 3 DRIVERS ACTIVE 40 VCC = 3.3V OUTPUT HIGH SUPPLY CURRENT (mA) 4 DRIVER OUTPUT VOLTAGE (V) Supply Current vs Data Rate 45 2.2 60 70 1327 G01 1.0 35 30 25 20 15 10 5 0 0 10 40 30 50 20 TEMPERATURE (°C) 60 70 1327 G02 0 20 40 60 80 100 DATA RATE (k BAUD) 120 140 1327 G03 3 LTC1327 U W TYPICAL PERFOR A CE CHARACTERISTICS Driver Leakage in SHUTDOWN vs Temperature VCC Supply Current vs Data Rate 45 45 VCC = 3.3V RL = 3k CL = 1000pF 3 DRIVERS ACTIVE 30 25 20 15 10 35 30 25 VOUT = –20V 20 15 10 VOUT = 20V 5 5 SHORT-CIRCUIT CURRENT (mA) 35 14 40 LEAKAGE CURRENT (µA) SUPPLY CURRENT (mA) 40 0 20 40 60 80 100 DATA RATE (k BAUD) 120 0 140 10 30 20 40 50 TEMPERATURE (°C) 10 8 Receiver Short-Circuit Current vs Temperature 6 60 2 0 70 DRIVER OUTPUT RL = 3k CL = 1000pF ISC – 40 30 50 20 SUPPLY VOLTAGE (V) 60 70 1327 G06 RECEIVER OUTPUT CL = 50pF 30 25 10 Receiver Output Waveform DRIVER OUTPUT RL = 3k 35 ISC + 4 Driver Output Waveform 40 ISC – 1327 G05 1327 G03 20 12 0 0 0 SHORT-CIRCUIT CURRENT (mA) Driver Short-Circuit Current vs Supply Voltage INPUT 15 INPUT ISC + 10 1327 G08 5 1327 G09 0 0 20 10 30 40 50 60 70 TEMPERATURE (°C) 1327 G07 U U U PI FU CTIO S VCC: 3.3V Input Supply Pin. Supply current 0.2µA in the SHUTDOWN mode. This pin should be decoupled with a 0.1µF ceramic capacitor. GND: Ground Pin. ON/OFF: TTL/CMOS Compatible Shutdown Pin. A logic low puts the device in SHUTDOWN mode which reduces the supply current to 0.2µA and places all drivers and receivers in high impedance state. This pin cannot float. V +: Positive Supply Output (EIA/TIA-562 Drivers). V + ≅ 2VCC – 1V. This pin requires an external capacitor 4 C = 0.1µF for charge storage. The capacitor may be tied to ground or 3.3V. 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 (EIA/TIA-562 Drivers). V – ≅ – (2VCC – 1.3). This pin requires an external capacitor C = 0.1µF for a charge storage. LTC1327 U U U PI FU CTIO S 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 20Ω. DR IN: EIA/TIA-562 Driver Input Pins. Inputs are TTL/ CMOS compatible. Inputs should not be allowed to float. Tie unused inputs to VCC. DR OUT: Driver Outputs at EIA/TIA-562 Voltage Levels. Outputs are in a high impedance state when in SHUT- DOWN 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. Outputs are in a high impedance state when in SHUTDOWN mode to allow data line sharing. TEST CIRCUITS Driver Timing Test Load ESD Test Circuit V+ C1 0.1µF VCC C2 0.1µF DR1 OUT RX1 IN EIA/TIA 562 LINE PINS PROTECTED TO ±10kV DR2 OUT RX2 IN RX3 IN RX4 IN DR3 OUT RX5 IN ON/OFF NC 28 1 2 LTC1327 V– 27 3 26 4 25 5 24 6 23 7 22 8 21 9 20 10 19 11 18 12 17 13 16 14 15 C3 0.1µF C4 0.1µF DRIVER INPUT DRIVER OUTPUT DR 51pF 3k DR1 IN RX1 OUT 1327 TC02 DR2 IN RX2 OUT RX3 OUT RX4 OUT Receiver Timing Test Load DR3 IN RX5 OUT GND RX OUTPUT RX IN LT1327 • TC01 RX 51pF 1327 TC03 5 LTC1327 U W W SWITCHI G TI E WAVEFOR S Driver Propagation Delay Timing VCC DR INPUT 1.4V 1.4V 0V V+ DR OUTPUT 0V 0V t LHD V– t HLD 1327 WF01 Receiver Propagation Delay Timing VCC 1.7V RX INPUT 1.3V 0V VCC RX OUTPUT 0V 0.8V t LHR t HLR 0V 1327 WF02 U W U UO APPLICATI S I FOR ATIO The LTC1327 is compatible with RS232 parts. This table shows some devices and the receiver input thresholds. INPUT LOW THRESHOLD (VIL) MIN TYP MAX INPUT HIGH THRESHOLD (VIH) MIN TYP MAX MANUFACTURER PART NUMBER COMPATIBLE Linear Technology LT1080 √ 0.8 1.3 – – 1.7 2.4 LT1137A √ 0.8 1.3 – – 1.7 2.4 LT1330 √ 0.8 1.3 – – 1.7 2.4 LT1281 √ 0.8 1.3 – – 1.7 2.4 Texas Instruments Maxim Sipex Motorola National 6 All Others √ SN75189 √ 0.65 1 1.25 0.9 1.3 1.6 SN75189A √ 0.65 1 1.25 1.55 1.9 2.25 MAX232 √ 0.8 1.2 – – 1.7 2.4 SN75C185 √ 0.65 1 1.25 1.6 2.1 2.55 MAX232A √ 0.8 1.3 – – 1.8 2.4 MAX241 √ 0.6 1.2 – – 1.5 2.4 SP232 √ 0.8 1.2 – – 1.7 2.4 SP301 √ 0.75 – 1.35 1.75 2.5 MC1489 √ 0.75 – 1.25 1 – 1.5 MC1489A √ 0.75 0.8 1.25 1.75 1.95 2.25 DS1489 √ 0.75 1 1.25 1 1.25 1.5 DS14C89A √ 0.5 – 1.9 1.3 – 2.7 LTC1327 U PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. G Package 28-Lead SSOP 0.397 – 0.407* (10.07 – 10.33) 0.205 – 0.212* (5.20 – 5.38) 0.068 – 0.078 (1.73 – 1.99) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 0° – 8° 0.0256 (0.65) BSC 0.022 – 0.037 (0.55 – 0.95) 0.005 – 0.009 (0.13 – 0.22) 0.301 – 0.311 (7.65 – 7.90) 0.045 (1.14) 0.002 – 0.008 (0.05 – 0.21) 0.010 – 0.015 (0.25 – 0.38) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 0.045 (1.14) *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm). N Package 28-Lead Plastic DIP 0.600 – 0.625 (15.240 – 15.875) 0.009 – 0.015 (0.229 – 0.381) ( 0.130 ± 0.005 (3.302 ± 0.127) +0.635 15.87 –0.381 0.045 – 0.065 (1.143 – 1.651) 0.015 (0.381) MIN +0.025 0.625 –0.015 ) 1.455 (36.957) MAX 0.070 (1.778) TYP 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 0.505 – 0.560 (12.827 – 14.224) 0.125 (3.175) MIN 0.035 – 0.080 (0.889 – 2.032) 0.018 ± 0.003 (0.457 ± 0.076) 0.100 ± 0.010 (2.540 ± 0.254) S Package 28-Lead Plastic SOL 0.005 (0.127) RAD MIN 0.291 – 0.299 (7.391 – 7.595) (NOTE 2) 0.037 – 0.045 (0.940 – 1.143) 0.093 – 0.104 0.010 – 0.029 × 45° (2.362 – 2.642) (0.254 – 0.737) 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° – 8° TYP 0.009 – 0.013 (0.229 – 0.330) NOTE 1 0.016 – 0.050 (0.406 – 1.270) 0.050 (1.270) TYP 0.014 – 0.019 (0.356 – 0.482) 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. 0.004 – 0.012 (0.102 – 0.305) 0.394 – 0.419 (10.007 – 10.643) NOTE 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 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. 7 LTC1327 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 SOUTHEAST REGION Linear Technology Corporation 17060 Dallas Parkway Suite 208 Dallas, TX 75248 Phone: (214) 733-3071 FAX: (214) 380-5138 SOUTHWEST REGION Linear Technology Corporation 22141 Ventura Blvd. Suite 206 Woodland Hills, CA 91364 Phone: (818) 703-0835 FAX: (818) 703-0517 Linear Technology Corporation 266 Lowell St., Suite B-8 Wilmington, MA 01887 Phone: (508) 658-3881 FAX: (508) 658-2701 CENTRAL REGION Linear Technology Corporation Chesapeake Square 229 Mitchell Court, Suite A-25 Addison, IL 60101 Phone: (708) 620-6910 FAX: (708) 620-6977 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 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 GERMANY Linear Techonolgy GMBH Untere Hauptstr. 9 D-85386 Eching Germany Phone: 49-89-3197410 FAX: 49-89-3194821 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 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 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 ● FAX: (408) 434-0507 ● TELEX: 499-3977 LT/GP 1293 10K REV 0 • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 1993