LTC1385_1资料

LTC13853.3V Low PowerEIA/TIA-562 TransceiverFEATURESssssssssDESCRIPTIOssOperates from a Single 3.3V SupplyLow Supply Current: ICC = 200µAICC = 35µA in Driver Disable ModeICC = 0.2µA in Shutdown ModeESD Protection Over ±10kVUses Small Capacitors: 0.1µFOperates to 120kBaudOutput Overvoltage Does Not Force CurrentBack into SuppliesEIA/TIA-562 I/O Lines Can Be Forced to ±25VWithout DamagePin Compatible with LT1180AThe LTC®1385 is an ultra-low power, 2-driver/2-receiverEIA/TIA-562 transceiver which operates from a single3.3V supply. The charge pump requires only four space-saving 0.1µF capacitors.The transceiver operates in one of three modes: Normal,Driver Disable or Shutdown. In the Normal mode, ICC isonly 200µA in the unloaded condition. In the Driver Disablemode, the charge pump is turned off, the driver outputsare forced into three-state, both receivers are kept active,and ICC drops to 35µA. In the Shutdown mode, everythingis turned off and ICC drops to 0.2µA.The LTC1385 is fully compliant with all data rate andovervoltage EIA/TIA-562 specifications. The transceivercan 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 ±10kVESD strikes., LTC and LT are registered trademarks of Linear Technology Corporation.UAPPLICATIO SssNotebook ComputersPalmtop ComputersTYPICAL APPLICATIO2-Drivers/2-Receivers with Shutdownand Driver Disable20.1µF0.1µFLOGIC INPUT456VCC12VCCLOGIC INPUTLOGIC OUTPUTLOGIC OUTPUT1113105k5k300k814916562 OUTPUT562 INPUT562 INPUT300k15LTC138517370.1µF562 OUTPUT0.1µFVCC = 3.3VQuiescent and Shutdown Supply Currentvs Temperature600500QUIESCENT CURRENT (µA)4003002001000–20SHUTDOWNCURRENT02040TEMPERATURE (°C)60QUIESCENTCURRENTON/OFF181TEST CONDITION: VCC = 3.3VLTC1385 • TA02DRIVER DISABLELTC1385 • TA01U1.21.0SHUTDOWN CURRENT (µA)U0.80.60.40.2080sn1385 1385fas1

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LTC1385

ABSOLUTE AXI U RATI GSSupply Voltage (VCC)................................................ 5VInput VoltageDriver....................................... –0.3V to VCC + 0.3VReceiver............................................... –25V to 25VDigital Input............................... –0.3V to VCC + 0.3VOutput VoltageDriver....................................................–25V to 25VReceiver.................................... –0.3V to VCC + 0.3VShort-Circuit DurationV+................................................................... 30 secV–................................................................... 30 secDriver Output.............................................. IndefiniteReceiver Output.......................................... IndefiniteOperating Temperature RangeLTC1385C............................................. 0°C to 70°CLTC1385I........................................... –40°C to 85°CStorage Temperature Range................ –65°C to 150°CLead Temperature (Soldering, 10 sec)................. 300°CUUWPACKAGE/ORDER I FOR ATIOTOP VIEWDRIVERDISABLEC1+V+C1–C2+C2–V–TR2 OUTRX2 IN123456720ON/OFF19VCC18GND17TR1 OUT16RX1 IN15RX1 OUT14TR1 IN13TR2 IN12RX2 OUT11NCG PACKAGE20-LEAD SSOPORDER PARTNUMBERLTC1385CGLTC1385IGNC10TJMAX = 125°C, θJA = 135°C/WConsult LTC Marketing for parts specified with wider operating temperature ranges.DC ELECTRICAL CHARACTERISTICSPARAMETERAny DriverOutput Voltage SwingLogic Input Voltage LevelLogic Input CurrentOutput Short-Circuit CurrentOutput Leakage CurrentCONDITIONS3k to GNDThe q denotes specifications which apply over the full operatingtemperature range. VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, VON/OFF = VCC, Driver Disable = VCC, unless noted.MINPositiveNegativeqqqqqqqInput Low Level (VOUT = High)Input High Level (VOUT = Low)VIN = VCCVIN = 0VVOUT = 0VShutdown or Driver Disable or VCC = 0V (Note 3,4),VOUT = ±20V2

UWWWTOP VIEWDRIVER DISABLE 1C1+2V+318ON/OFF17VCC16GND15TR1 OUT14RX1 IN13RX1 OUT12TR1 IN11TR2 IN10RX2 OUTSW PACKAGE18-LEAD PLASTIC SOORDER PARTNUMBERLTC1385CNLTC1385CSWLTC1385INLTC1385ISWC1–4C2+5C2–6V–7TR2 OUT8RX2 IN9N PACKAGE18-LEAD PDIPTJMAX = 125°C, θJA = 85°C/WTYP 4.5–4.51.41.4–20±10±10MAXUNITSVVVVµAµAmAµA 3.7–3.72.00.8 5–40±500sn1385 1385fas元器件交易网www.cecb2b.com

LTC1385

DC ELECTRICAL CHARACTERISTICSPARAMETERAny ReceiverInput Voltage ThresholdsHysteresisInput ResistanceOutput VoltageOutput Short-Circuit CurrentOutput Leakage CurrentPower Supply GeneratorV+ Output VoltageV– Output VoltageSupply Rise TimePower SupplyVCC Supply CurrentSupply Leakage Current (VCC)Digital Input Threshold LowDigital Input Threshold HighCONDITIONSInput Low ThresholdInput High ThresholdThe q denotes specifications which apply over the full operatingtemperature range. VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, VON/OFF = VCC, Driver Disable = VCC, unless noted.MINqqqTYP1.31.70.450.23.2–20 715.75.5–5.3–5.00.2MAXUNITSVVVkΩVVmAmAµAVVVVms0.80.133.0–5 2–10V ≤ VIN ≤ 10VOutput Low, IOUT = –1.6mA (VCC = 3.3V)Output High, IOUT = 160µA (VCC = 3.3V)Sinking Current, VOUT = VCCSourcing Current, VOUT = 0VShutdown (Note 4), 0V ≤ VOUT ≤ VCCIOUT = 0mAIOUT = 5mAIOUT = 0mAIOUT = –5mAShutdown or Driver Disable to Turn-OnNo Load (Note 2), 0°C to 70°CNo Load (Note 2), –40°C to 85°CShutdown (Note 4)Driver Disable (Note 3)qq2.41.070.4q10qqqqqq2.00.23.50.2351.41.40.51.010500.8mAmAµAµAVVThe q denotes specifications which apply over the full operating temperature range. VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, unless noted.PARAMETERSlew RateDriver Propagation Delay(TTL to EIA/TIA-562)Receiver Propagation Delay(EIA/TIA-562 to TTL)CONDITIONSRL = 3k, CL = 51pFRL = 3k, CL = 1000pFtHLD (Figure 1)tLHD (Figure 1)tHLR (Figure 2)tLHR (Figure 2)MIN3qqqqAC CHARACTERISTICSTYP85220.30.2MAX303.53.50.80.8UNITSV/µsV/µsµsµsµsµsNote 1: Absolute Maximum Ratings are those values beyond which the lifeof the device may be impaired.Note 2: Supply current is measured with driver and receiver outputsunloaded.Note 3: Measurements made in the Driver Disable mode are performedwith VDRIVER DISABLE = GND and VON/OFF = VCC.Note 4: Measurements made in the Shutdown mode are performed withVON/OFF = 0V.sn1385 1385fas3

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LTC1385

TYPICAL PERFOR A CE CHARACTERISTICS Driver Output Voltagevs Temperature54DRIVER OUTPUT VOLTAGE (V)THRESHOLD VOLTAGE (V)3210–1–2–3–4–5010OUTPUT HIGHVCC = 3.3V1.81.61.4VTH+ALL DRIVERS WITH LOADRL = 3kSUPPLY CURRENT (mA)OUTPUT LOWVCC = 3.3V40302050TEMPERATURE (°C)6070VCC Supply Currentvs Temperature4.54.0LEAKAGE CURRENT (µA)SUPPLY CURRENT (mA)3.53.02.52.01.51.00.500102 DRIVERS LOADEDRL = 3kSHORT-CIRCUIT CURRENT (mA)1 DRIVER LOADEDRL = 3k20305040TEMPERATURE (°C)LTC1385 • TPC04Receiver Short-Circuit Currentvs Temperature4540SHORT-CIRCUIT CURRENT (mA)DRIVEROUTPUTRL = 3kCL = 1000pFDRIVEROUTPUTRL = 3k3530252015105001030504020TEMPERATURE (°C)6070ISC+ISC–LTC1385 • TPC0

UWLTC1385 • TPC01Receiver Input Thresholdsvs Temperature2.22.01520Supply Current vs Data RateVCC = 3.3VRL = 3kCL = 2500pFALL DRIVERS ACTIVE10VTH–1.21.0501040305020TEMPERATURE (˚C)60700020408010060DATA RATE (kBAUD)120140LTC1385 • TPC02LTC1385 • TPC03Driver Leakage in Shutdownvs Temperature45403530252015105060701816141210820Driver Short-Circuit Currentvs TemperatureISC–VOUT = –20VISC+VOUT = 20V01030204050TEMPERATURE (°C)607001030504020TEMPERATURE (°C)6070LTC1385 • TPC05LTC1385 • TPC06Driver Output WaveformsRECEIVEROUTPUTCL = 51pFReceiver Output WaveformINPUTINPUTLTC1385 • TPC08LTC1385 • TPC09sn1385 1385fas元器件交易网www.cecb2b.com

LTC1385

PI FU CTIO SVCC: 3.3V Input Supply Pin. This pin should be decoupledwith a 0.1µF ceramic capacitor.GND: Ground Pin.ON/OFF: TTL/CMOS Compatible Shutdown Pin. A logiclow puts the device in the Shutdown mode independentof the Driver Disable pin. The supply current drops to0.2µA and all driver and receiver outputs are forced intothree-state.DRIVER DISABLE: TTL/CMOS Compatible Input Pin. Withthe ON/OFF pin held high, a logic low forces the part intothe Driver Disable mode with the charge pump turned offand the driver outputs forced into three-state. Both receiv-ers remain active and the supply current drops to 35µA. Alogic high forces the part into the Normal mode.V+: Positive Supply Output (EIA/TIA-562 Drivers).V+ ≅ 2VCC – 1V. This pin requires an external capacitorC = 0.1µF for charge storage. The capacitor may be tiedto ground or VCC. With multiple devices, the V+ and V–pins may share a common capacitor. For a large numberof devices, increasing the size of the shared commonstorage capacitors is recommended to reduce ripple.V–: Negative Supply Output (EIA/TIA-562 Drivers).V– ≅ –(2VCC – 1.3V). This pin requires an externalcapacitor C = 0.1µF for charge storage.C1+, C1–, C2+, C2–: Commutating Capacitor Inputs. Thesepins require two external capacitors C = 0.1µF: one fromC1+ to C1–, and another from C2+ to C2–. To maintaincharge pump efficiency, the capacitor’s effective seriesresistance should be less than 2Ω.TR IN: EIA/TIA-562 Driver Input Pins. Inputs are TTL/CMOS compatible. The inputs of unused drivers can be leftunconnected since 300k input pull-up resistors to VCC areincluded on chip. To minimize power consumption, theinternal driver pull-up resistors are disconnected from VCCin the Shutdown mode.TR OUT: Driver Outputs at EIA/TIA-562 Voltage Levels.Outputs are in a high impedance state when in the Shut-down or Driver Disable mode or VCC = 0V. The driveroutputs are protected against ESD to ±10kV for humanbody model discharges.RX IN: Receiver Inputs. These pins can be forced to ±25Vwithout damage. The receiver inputs are protected againstESD to ±10kV for human body model discharges. Eachreceiver provides 0.4V of hysteresis for noise immunity.RX OUT: Receiver Outputs with TTL/CMOS Voltage Lev-els. Outputs are in a high impedance state when in theShutdown mode.UWWSWITCHI G TI E WAVEFOR S DRIVERINPUTDRIVEROUTPUT tLHDVCC1.4V1.4V0VV+0V tHLD0VV–1385 F01Figure 1. Driver Propagation Delay TimingUUURXINPUTRXOUTPUT tLHR1.7VVCC1.3V0V2.4V tHLRVCC0V1385 F020.8VFigure 2. Receiver Propagation Delay Timingsn1385 1385fas5

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LTC1385

TEST CIRCUITS Driver Timing Test LoadReceiver Timing Test LoadDRIVERINPUTDRIVEROUTPUTDRIVER51pF3kRX INPUTRXOUTPUTRX51pF1385 F041385 F03ESD Test Circuit20.1µF0.1µFLOGIC INPUT456VCC12VCCLOGIC INPUTLOGIC OUTPUTLOGIC OUTPUT111310S17LTC138537300k15SVCC0.1µF562 OUTPUT0.1µF300kS8145k5k916562 OUTPUT562 INPUT562 INPUTSRS562LINE PINSPROTECTED TO ±10kVON/OFF181DRIVER DISABLE1385 F05sn1385 1385fas6

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LTC1385

PACKAGE DESCRIPTIO7.8 – 8.20.42 ±0.03RECOMMENDED SOLDER PAD LAYOUT 5.00 – 5.60**(.197 – .221)0.09 – 0.25(.0035 – .010)0.55 – 0.95(.022 – .037)NOTE:1. CONTROLLING DIMENSION: MILLIMETERSMILLIMETERS2. DIMENSIONS ARE IN(INCHES)3. DRAWING NOT TO SCALE*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED .152mm (.006\") PER SIDE**DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED .254mm (.010\") PER SIDE.300 – .325(7.620 – 8.255).008 – .015(0.203 – 0.381)+.035.325–.015+0.88.255–0.381()INCHESMILLIMETERS*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)NOTE:1. DIMENSIONS AREInformation 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 representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.UG Package20-Lead Plastic SSOP (5.3mm)(Reference LTC DWG # 05-08-10) 6.90 – 7.50*(.272 – .295 )201918171615141312111.25 ±0.125.3 – 5.77.40 – 8.20(.291 – .323)0.65 BSC1234567102.0(.079)0° – 8°0.65(.0256)BSC0.22 – 0.38(.009 – .015)0.05(.002)G20 SSOP 0802N Package18-Lead PDIP (Narrow .300 Inch)(Reference LTC DWG # 05-08-1510) .900*(22.860)MAX181716151413121110 .255 ± .015*(6.477 ± 0.381)1.130 ± .005(3.302 ± 0.127).020(0.508)MIN234567.045 – .065(1.143 – 1.651).065(1.651)TYP.120(3.048)MIN.005(0.127)MIN.100(2.54)BSC.018 ± .003(0.457 ± 0.076)N18 1002sn1385 1385fas7

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LTC1385

PACKAGE DESCRIPTIO.030 ±.005TYPN.420MIN123RECOMMENDED SOLDER PAD LAYOUT.291 – .299(7.391 – 7.595)NOTE 4.010 – .029× 45°(0.254 – 0.737)0° – 8° TYP1.093 – .104(2.362 – 2.2)234567.037 – .045(0.940 – 1.143).005(0.127)RAD MIN.009 – .013(0.229 – 0.330)NOTE 3.016 – .050(0.406 – 1.270)NOTE:INCHES1. DIMENSIONS IN (MILLIMETERS)2. DRAWING NOT TO SCALE3. 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 OPTIONS4. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006\" (0.15mm)RELATED PARTSPART NUMBERLT1780/LT1781LTC1327LTC1348LTC1382LTC1383LTC1384LTC1386DESCRIPTION5V, 2 Driver, 2 Receiver RS232 Transceivers3.3V, 3 Driver, 5 Receiver RS562 Transceiver3.3V to 5V, 3 Driver, 5 Receiver RS232 Transceiver5V, 2 Driver, 2 Receiver RS232 Transceiver5V, 2 Driver, 2 Receiver RS232 Transceiver5V, 2 Driver, 2 Receiver RS232 Transceiver3.3V, 2 Driver, 2 Receiver RS562 TransceiverCOMMENTS±15kV ESD per IEC 1000-4300µA Supply Current, 0.2µA in ShutdownTrue RS232 on 3.3V, 5 Receivers Active in Shutdown200µA Supply Current, 0.2µA in Shutdown200µA Supply Current, Narrow 16-Pin SO200µA Supply Current, 2 Receivers Active in Shutdown200µA Supply Current, Narrow 16-Pin SO8

Linear Technology Corporationq

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1630 McCarthy Blvd., Milpitas, CA 95035-7487(408) 432-1900 FAX: (408) 434-0507 www.linear.comUSW Package18-Lead Plastic Small Outline (Wide .300 Inch)(Reference LTC DWG # 05-08-1620).050 BSC.045 ±.005.447 – .463(11.354 – 11.760)NOTE 4181716151413121110N.325 ±.005 NOTE 3.394 – .419(10.007 – 10.3)N/2N/2.050(1.270)BSC.014 – .019(0.356 – 0.482)TYP.004 – .012(0.102 – 0.305)S18 (WIDE) 0502sn1385 1385fasLW/TP 1002 1K REV A • PRINTED IN USA

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