LTC488CSW Analog Devices

LTC488/LTC489 Quad RS485 Line Receiver FEATURES DESCRIPTION n Low Power: I = 7mA Typ The LTC 488 and LTC489 are low power differential bus/ CC n Designed for RS485 or RS422 Applications line receivers designed for multipoint data transmission n Single 5V Supply standard RS485 applications with extended common n 7V to 12V Bus Common Mode Range Permits 7V mode range (12V to 7V). They also meet the require- Ground Difference Between Devices on the Bus ments of RS422. n 60mV Typical Input Hysteresis The CMOS design offers signi cant power savings over n Receiver Maintains High Impedance in Three-State or its bipolar counterpart without sacri cing ruggedness with the Power Off against overload or ESD damage. n 28ns Typical Receiver Propagation Delay n The receiver features three-state outputs, with the receiver Pin Compatible with the SN75173 (LTC488) n output maintaining high impedance over the entire com- Pin Compatible with the SN75175 (LTC489) mon mode range. The receiver has a fail-safe feature which guarantees a APPLICATIONS high output state when the inputs are left open. n Low Power RS485/RS422 Receivers Both AC and DC speci cations are guaranteed 4.75V to n Level Translator 5.25V supply voltage range. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION EN EN EN EN 4 2 12 DRIVER RECEIVER 3 120 120 RO DI 1/4 LTC486 1/4 LTC488 1 4000 FT 24 GAUGE TWISTED PAIR EN12 EN12 2 4 DRIVER RECEIVER 3 120 120 RO DI 1/4 LTC487 1/4 LTC489 1 4000 FT 24 GAUGE TWISTED PAIR 4889 TA01 4889fb 1LTC488/LTC489 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage (V ) ................................................12V Operating Temperature Range CC Control Input Currents .......................... 25mA to 25mA LTC488C/LTC489C ................................... 0C to 70C Control Input Voltages ..................0.5V to (V + 0.5V) LTC488I/LTC489I ..................................40C to 85C CC Receiver Input Voltages ..........................................14V Storage Temperature Range ...................65C to 150C Receiver Output Voltages ..............0.5V to (V + 0.5V) Lead Temperature (Soldering, 10 sec) .................. 300C CC PIN CONFIGURATION LTC488 LTC488 TOP VIEW TOP VIEW B1 1 16 V B1 1 16 V CC CC R R A1 2 15 B4 A1 2 15 B4 R R RO1 3 14 A4 RO1 3 14 A4 EN 4 13 RO4 EN 4 13 RO4 RO2 5 12 EN RO2 5 12 EN A2 6 11 RO3 A2 6 11 RO3 R R B2 7 10 A3 B2 7 10 A3 R R GND 8 9 B3 GND 8 9 B3 SW PACKAGE N PACKAGE 16-LEAD PLASTIC (WIDE) SO 16-LEAD PLASTIC DIP T = 150C, = 90C/W T = 150C, = 70C/W JMAX JA JMAX JA LTC489 LTC489 TOP VIEW TOP VIEW B1 1 16 V B1 1 16 V CC CC R R A1 2 15 B4 A1 2 15 B4 R R RO1 3 14 A4 RO1 3 14 A4 EN12 4 13 RO4 EN12 4 13 RO4 RO2 5 12 EN34 RO2 5 12 EN34 A2 6 11 RO3 A2 6 11 RO3 R R B2 7 10 A3 B2 7 10 A3 R R GND 8 9 B3 GND 8 9 B3 SW PACKAGE N PACKAGE 16-LEAD PLASTIC (WIDE) SO 16-LEAD PLASTIC DIP T = 150C, = 90C/W T = 150C, = 70C/W JMAX JA JMAX JA 4889fb 2