LTC486 Quad Low Power RS485 Driver FEATURES DESCRIPTION n Very Low Power: I = 110A Typ The LTC 486 is a low power differential bus/line driver CC n Designed for RS485 or RS422 Applications designed for multipoint data transmission standard RS485 n Single 5V Supply applications with extended common-mode range (12V to n 7V to 12V Bus Common-Mode Range Permits 7V 7V). It also meets RS422 requirements. GND Difference Between Devices on the Bus The CMOS design offers significant power savings over n Thermal Shutdown Protection its bipolar counterpart without sacrificing ruggedness n Power-Up/Down Glitch-Free Driver Outputs Permit against overload or ESD damage. Live Insertion/Removal of Package n Driver Maintains High Impedance in Three-State or The driver features three-state outputs, with the driver with the Power Off outputs maintaining high impedance over the entire n 28ns Typical Driver Propagation Delays with 5ns common-mode range. Excessive power dissipation caused Skew by bus contention or faults is prevented by a thermal n Pin Compatible with the SN75172, DS96172, shutdown circuit which forces the driver outputs into a A96172, and DS96F172 high impedance state. Both AC and DC specifications are guaranteed from 0C to 70C (Commercial), 40C to 85C (Industrial), over APPLICATIONS the 4.75V to 5.25V supply voltage range. n Low Power RS485/RS422 Drivers L, LT, LTC, LTM, Linear Technology, Module and the Linear logo are registered trademarks of n Level Translator Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION RS485 Length Specification 10k EN EN 1k 4 4 2 1 120 120 3 DI DRIVER RECEIVER RO 100 1 4000 FT BELDEN 9841 12 1/4 LTC488 1/4 LTC486 EN 486 TA01a 10 10k 100k 1M 2.5M 10M DATA RATE (bps) 486 TA01b * APPLIES FOR 24 GAUGE, POLYETHYLENE DIELECTRIC TWISTED PAIR 486fc 1 CABLE LENGTH (FT)LTC486 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Supply Voltage (V ) ................................................12V CC TOP VIEW Control Input Voltages .......................0.5V to V + 0.5V CC DI1 1 16 V CC Driver Input Voltages ...................... 0.5V to V + 0.5V CC DO1A 2 15 DI4 Driver Output Voltages ............................................14V DO1B 3 14 DO4A Control Input Currents .........................................25mA EN 4 13 DO4B Driver Input Currents ...........................................25mA DO2B 5 12 EN Operating Temperature Range DO2A 6 11 DO3B LTC486C .................................................. 0C to 70C DI2 7 10 DO3A LTC486I................................................40C to 85C GND 8 9 DI3 Storage Temperature Range ................... 65C to 150C N PACKAGE SW PACKAGE 16-LEAD PLASTIC DIP 16-LEAD PLASTIC SO Lead Temperature (Soldering, 10 sec) .................. 300C T = 125C, = 70C/W (N) JMAX JA T = 150C, = 95C/W (SW) JMAX JA Consult factory for Military grade parts. ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC486CN PBF LTC486CN TRPBF LTC486CN 16-Lead Plastic DIP 0C to 70C LTC486CSW PBF LTC486CSW TRPBF LTC486CSW 16-Lead Plastic SO 0C to 70C LTC486IN PBF LTC486IN TRPBF LTC486IN 16-Lead Plastic DIP 40C to 85C LTC486ISW PBF LTC486ISW TRPBF LTC486ISW 16-Lead Plastic SO 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. For more information on lead free part marking, go to: