LT490 Datasheet | Linear Technology

LTC490 Differential Driver and Receiver Pair Features s s s s DESCRIPTIO s s s s s s s Low Power: ICC = 300µA Typical Designed for RS485 or RS422 Applications Single 5V Supply - 7V to 12V Bus mon-Mode Range Permits ± 7V Ground Difference Between Devices on the Bus Thermal Shutdown Protection Power-Up/Down Glitch-Free Driver Outputs Permit Live Insertion or Removal of Package Driver Maintains High Impedance with the Power Off bined Impedance of a Driver Output and Receiver Allows up to 32 Transceivers on the Bus 70m V Typical Input Hysteresis 28ns Typical Driver Propagation Delays with 5ns Skew Pin patible with the SN75179 The LTC490 is a low power differential bus/line transceiver designed for multipoint data transmission standard RS485 applications with extended mon-mode range (12V to - 7V). It also meets the requirements of RS422. The CMOS design offers significant power savings over its bipolar counterpart without sacrificing ruggedness against overload or ESD damage. Excessive power dissipation caused by bus contention or faults is prevented by a thermal shutdown circuit which forces the driver outputs into a high impedance state. The receiver has a fail safe feature which guarantees a high output state when the inputs are left open. Both AC and DC specifications are guaranteed from 0°C to 70°C and 4.75V to 5.25V supply voltage range. APPLICATI s s Low Power RS485/RS422 Transceiver Level Translator TYPICAL APPLICATI LTC490 5 D 3 DRIVER 120Ω 6 4000 FT BELDEN 9841 120Ω 8 R 2 RECEIVER 120Ω 7 4000 FT BELDEN 9841 120Ω DRIVER D LTC490 RECEIVER R LTC490 - TA01 LTC490 ABSOLUTE (Note 1) AXI U RATI GS PACKAGE/ORDER I FOR ATIO TOP VIEW VCC 1 R 2 D 3 Supply Voltage (VCC) ............................................... 12V Driver Input Currents ........................... - 25m A to 25m A Driver Input Voltages ....................... - 0.5V to VCC +0.5V Driver Output Voltages .......................................... ± 14V...