LTC1480CN8#PBF Analog Devices

LTC1480 3.3V Ultralow Power RS485 Transceiver FEATURES DESCRIPTIO True RS485 from a Single 3.3V Supply The LTC 1480 is an ultralow power differential line trans- Low Power: I = 500A Max with Driver Disabled ceiver which provides full RS485 compatibility while oper- CC I = 600A Max with Driver Enabled, No Load ating from a single 3.3V supply. It is designed for data CC 1A Quiescent in Shutdown Mode transmission standard RS485 applications with extended 7V to 12V Common Mode Range Permits 7V common mode range (12V to 7V). It also meets the Ground Difference Between Devices on the Data Line requirements of RS422 and features high speed operation Thermal Shutdown Protection up to 2.5Mb/s. The CMOS design offers significant power Power Up/Down Glitch-Free Driver Outputs Permit savings without sacrificing ruggedness against overload Live Insertion or Removal of Transceiver or ESD damage. Typical quiescent current is only 300A Driver Maintains High Impedance in Three-State or while operating and 1A in shutdown. with the Power Off The driver and receiver feature three-state outputs, with Up to 32 Transceivers on the Bus the driver outputs maintaining high impedance over the 50ns Typical Driver Propagation Delays with entire common mode range. Excessive power dissipation 10ns Skew caused by bus contention or faults is prevented by a Pin Compatible with the LTC485 thermal shutdown circuit which forces the driver outputs Available in 8-Lead DIP and SO Packages into a high impedance state. The receiver has a fail-safe feature which guarantees a high output state when the U inputs are left open. APPLICATIO S The LTC1480 is fully specified over the commercial and Battery-Powered RS485/RS422 Applications extended industrial temperature range. The LTC1480 is Low Power RS485/RS422 Transceiver available in 8-pin SO and DIP packages. Level Translator , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATIO Driver Differential Output Voltage vs Output Current 3.3V RS485 Network 3.5 3.3V 3.3V V = 3.3V CC LTC1480 LTC1480 T = 25C 3.0 A RO R SHIELD SHIELD R RO B B 2.5 RE RE 120 120 A A 2.0 DE DE DI D D DI 3.3V B A 1.5 1.0 0.5 LTC1480 R D 0 0 10 20 30 40 50 60 70 80 90 OUTPUT CURRENT (mA) 1480 TA01 RO RE DE DI 1480 TA02 1480fa 1 OUTPUT VOLTAGE (V) U ULTC1480 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) TOP VIEW Supply Voltage (V ) ................................................ 7V CC RO 1 8 V CC R Control Input Voltage..................... 0.3V to V + 0.3V CC RE 2 7 B Driver Input Voltage....................... 0.3V to V + 0.3V CC DE 3 A 6 Driver Output Voltage ........................................... 14V D DI 4 5 GND Receiver Input Voltage.......................................... 14V N8 PACKAGE S8 PACKAGE Receiver Output Voltage ................ 0.3V to V + 0.3V CC 8-LEAD PDIP 8-LEAD PLASTIC SO Operating Temperature Range T = 125C, = 130C/ W (N8) JMAX JA LTC1480C ....................................... 0C T 70C T = 125C, = 150C/ W (S8) JMAX JA A LTC1480I.................................... 40C T 85C A ORDER PART NUMBER S8 PART MARKING Storage Temperature Range ................. 65C to 150C 1480 LTC1480CN8 Lead Temperature (Soldering, 10 sec).................. 300C LTC1480IN8 1480I LTC1480CS8 LTC1480IS8 Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: