DESCRIPTIONCOMMENTS LTC 485Low Power RS485 TransceiverLT1137A3Dx/5Rx RS232 Transceiver15kV ESDLTC1387RS232/RS485 Multiprotocol TransceiverLT1780/LT17812Dx/2Rx RS232 Transceiver15kV ESDLT1785/LT179160V Fault Tolerant RS485 Transceiver15kV ESDDimensions in inches (millimeters) unless otherwise noted.PACKAGE DESCRIPTIOUSW Package28-Lead Plastic Small Outline (Wide 0.300)(LTC DWG # 05-08-1620)0.037 0.045(0.940 1.143)0.004 0.012(0.102 0.305)0.093 0.104(2.362 2.642)0.050(1.270)TYP0.014 0.019(0.356 0.482)TYP 0.697 0.712*(17.70 18.08)1 23 456 78 0.394 0.419(10.007 10.643)910 2526111222212019181716152324141327280 8 TYPNOTE 10.009 0.013(0.229 0.330)0.016 0.050(0.406 1.270) 0.291 0.299**(7.391 7.595) 45 0.010 0.029(0.254 0.737)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 OPTIONSDIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDEDIMENSION DOES NOT FEATURESDESCRIPTIO UAPPLICATIO S UTYPICAL APPLICATIO U2LT1237(Note 1)Supply Voltage (VCC) 6VV+ 13.2VV . 13.2VInput VoltageDriver..V to V+Receiver.. 30V to 30VOutput VoltageDriver. 30V to 30VReceiver 0.3V to VCC + 0.3VShort Circuit DurationV+. 30 secV . 30 secDriver Output. IndefiniteReceiver Output IndefiniteOperating Temperature RangeLT1237C. 0 C to 70 CStorage Temperature Range. 65 C to 150 CLead Temperature (Soldering, 10 sec).. 300 CUGWAWUWARBSO LU TEXIT IS WU UPACKAGE /ORDERIFORATIOORDER PART NUMBER Power Supply GeneratorV+ Output7.9VV Output 7VSupply Current (VCC )TA = 25 C (Note 3)612mAl614mASupply Current when OFF (VCC)Shutdown (Note 4)l0.060.15mADriver Disable3.00mASupply Rise TimeC1 = C2 = 0.2mF,2msShutdown to Turn-OnC+ = 1.0mF, C = 0.1mFON/OFF Pin ThresholdsInput Low Level (Drivers Enabled)0.81.2VInput High Level (Drivers Disabled)1.62.4VON/OFF Pin Current0V V ON/OFF 5Vl 1580 mADRIVER DISABLE Pin ThresholdsInput Low Level (Drivers Enabled)l0.81.4VInput High Level (Drivers Di specifications which apply over the full