LTC487 Quad Low Power RS485 Driver Fae Tseru Dpircse Tnoi n Very Low Power: I = 110A Typ The LTC 487 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 (7V to n 7V to 12V Bus Common Mode Range Permits 7V 12V). 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 The driver features three-state outputs, with the driver Driver Maintains High Impedance in Three-State or outputs maintaining high impedance over the entire com- with the Power Off n mon mode range. Excessive power dissipation caused 28ns Typical Driver Propagation Delays with by bus contention or faults is prevented by a thermal 5ns Skew n shutdown circuit which forces the driver outputs into a Pin Compatible with the SN75174, DS96174, high impedance state. A96174, and DS96F174 Both AC and DC specifications are guaranteed from 0C to 70C (Commercial), 40C to 85C (Industrial) and over a acilpp Tsnoi the 4.75V to 5.25V supply voltage range. n Low Power RS485/RS422 Drivers L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n Level Translator Technology Corporation. All other trademarks are the property of their respective owners. T lacipy a acilpp Tnoi RS485 Cable Length Specification* 10k EN 12 EN 12 4 4 1k 2 2 1 120 120 3 DI DRIVER RECEIVER RO 3 1 100 4000 FT BELDEN 9841 1/4 LTC489 1/4 LTC487 LTC487 TA01 10 10k 100k 1M 2.5M 10M DATA RATE (bps) LTC487 TA09 * APPLIES FOR 24 GAUGE, POLYETHYLENE DIELECTRIC TWISTED PAIR 487fc CABLE LENGTH (FT)LTC487 a ulosb T e Mixa Mu M r a Tsgni p ni c no Farugi Tnoi (Note 1) TOP VIEW Supply Voltage (V ) ................................................12V CC 1 16 DI1 V CC Control Input Voltages .................... 0.5V to V + 0.5V CC DO1A 2 15 DI4 Driver Input Voltages ...................... 0.5V to V + 0.5V CC 3 14 DO1B DO4A Driver Output Voltages ............................................ 14V EN12 4 13 DO4B Control Input Currents .........................................25mA DO2B 5 12 EN34 Driver Input Currents ...........................................25mA DO2A 6 11 DO3B Operating Temperature Range DI2 7 10 DO3A Commercial ............................................. 0C to 70C GND 8 9 DI3 Industrial .............................................40C to 85C N PACKAGE SW PACKAGE Storage Temperature Range .................. 65C to 150C 16-LEAD PLASTIC DIP 16-LEAD PLASTIC SO T = 125C, = 70C/W (N) JMAX JA Lead Temperature (Soldering, 10 sec.)..................300C T = 150C, = 95C/W (S) JMAX JA Consult factory for Military grade parts. o r D re i n Fro Ma Tnoi LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC487CN PBF LTC487CN TRPBF LTC487CN 16-Lead Plastic DIP 0C to 70C LTC487CSW PBF LTC487CSW TRPBF LTC487CSW 16-Lead Plastic SO 0C to 70C LTC487IN PBF LTC487IN TRPBF LTC487IN 16-Lead Plastic DIP 40C to 85C LTC487ISW PBF LTC487IS TRPBF LTC487ISW 16-Lead Plastic SO 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: