LTC2876/LTC2877 60V Rugged PROFIBUS RS485 Transceivers Fea T Descrip T n PROFIBUS IEC 61158-2 Compliant The LTC 2876 and LTC2877 are PROFIBUS RS485 n Protected from Overvoltage Line Faults to 60V transceivers designed to meet the test specifications for n PROFIBUS-DP masters and PROFIBUS-DP slaves, fully 52kV ESD Interface Pins, 15kV All Other Pins n compatible with IEC 61158-2, type 3: medium attachment 2kV (Level 4) IEC61000-4-4 Fast Transient Burst n unit (MAU). With operation up to 20Mbps, the LTC2876/ 25V Working Common Mode Range n LTC2877 supports all PROFIBUS data rates up to 12Mbps. 20Mbps Maximum Baud Rate n 1.65V to 5.5V Logic Supply Pin for Flexible Digital The LTC2876 and LTC2877 are exceptionally robust, toler- Interfacing (LTC2877) ating 60V faults on the bus pins and protected to 52kV n 5V Supply Can Operate Down to 3V for Low Power, ESD. These devices are suitable for harsh environments Low Swing Applications or where 24V power might be inadvertently connected. n Fully Balanced Differential Receiver Thresholds with Extended 25V input common mode range and full fail- 240mV Hysteresis for Superior Noise Tolerance and safe operation improve data communication reliability in Low Duty Cycle Distortion noisy systems. n Receiver Failsafe for Open, Shorted and Terminated The LTC2876 and LTC2877 meet PROFIBUS and RS485 Conditions specifications with a supply voltage of 4.5V to 5.5V but n Wide Operating Temperature Range: 40C to 125C can operate down to 3V with reduced supply current. n Available in Small DFN and MSOP Packages Product Selection Guide PART NUMBER LOGIC SUPPLY PIN PACKAGE a T LTC2876 NO DFN-8, MSOP-8 n PROFIBUS-DP LTC2877 YES DFN-10, MSOP-10 n Industrial Communication Networks L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n RS485 and RS422 Systems Technology Corporation. All other trademarks are the property of their respective owners. n 3V Low Voltage Differential Signaling Typical a T Eye Diagram of 12Mbps Signal at 1.8V 5V the Near and Far End of a 100m 5V PROFIBUS Cable Driven by the 8 LTC2877 Using 2 1 PRBS Pattern 0.1F 1F V V L CC LTC2877 390 390 PROFIBUS PBPA RO NEAR END CABLE 2V/DIV PB PB B RE C 220 220 PA SENSOR DI A PA Z = 150 O B A FAR END 2V/DIV 390 390 DE GND 28767 TA01b 20ns/DIV 28767 TA01a 28767fa 1 For more information www.linear.com/LTC2876 ion pplica ions pplica ion uresLTC2876/LTC2877 a T e Maxi Mu M r a T (Notes 1, 2) Supply Voltages (V , V ) ............................ 0.3V to 6V Operating Ambient Temperature Range (Note 3) CC L Logic Input Voltages (RE, DE, DI) ................ 0.3V to 6V LTC287xC ................................................ 0C to 70C Line Interface I/O (PA, PB) .......................... 60V to 60V LTC287xI..............................................40C to 85C Line Interface I/O Difference (PBPA) .....120V to 120V LTC287xH .......................................... 40C to 125C Receiver Output (RO) Storage Temperature Range .................. 65C to 150C LTC2876 ......................................0.3V to V + 0.3V Lead Temperature (Soldering, 10sec)....................300C CC LTC2877 ....................................... 0.3V to V + 0.3V L p c F T LTC2876 LTC2876 TOP VIEW TOP VIEW RO 1 8 V CC RO 1 8 V CC RE 2 7 PA RE 2 9 7 PA 9 DE 3 GND 6 PB GND DE 3 6 PB 5 DI 4 GND DI 4 5 GND MS8E PACKAGE 8-LEAD PLASTIC MSOP DD PACKAGE T = 150C, = 40C/W, = 10C/W JMAX JA JC 8-LEAD (3mm 3mm) PLASTIC DFN EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB T = 150C, = 43C/W, = 5.5C/W JMAX JA JC EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB LTC2877 LTC2877 TOP VIEW TOP VIEW RO 10 V 1 CC RO 1 10 V CC RE 2 9 PA RE 2 9 PA 11 11 DE 3 8 PB DE 3 8 PB GND GND DI 4 7 NC DI 4 7 NC V 5 6 GND L V 5 6 GND L MSE PACKAGE 10-LEAD PLASTIC MSOP DD PACKAGE T = 150C, = 40C/W, = 10C/W JMAX JA JC 10-LEAD (3mm 3mm) PLASTIC DFN EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB T = 150C, = 43C/W, = 5.5C/W JMAX JA JC EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB 28767fa 2 For more information www.linear.com/LTC2876 ion igura on in ings bsolu