• Product Introduction

LTC491IS 

Differential driver and receiver pairs

peculiarity Low power consumption: I CC = 300μA typical Designed for RS485 or RS422 applications Single 5V power supply 7V to 12V bus common-mode range license ± difference on the ground bus between 7V devices Thermal shutdown protection Power-Up/Down Trouble-free drive output license to plug or remove software packages with power Drive maintenance in three countries or high impedance when power is lost The combined impedance of one driver and receiver allows up to 32 transceivers on the bus 70mV typical input hysteresis A typical drive with a 28ns transfer latency of 5ns offset 2.5MB operation Compatible with SN75180 pins Available in 14-pin PDIP and SO packages description The LTC ® 491 is a low-power differential bus/line transceiver designed for point-to-multipoint data transmission with extended common-mode range (-7V to 12V) standard RS485 applications. It also meets the requirements of RS-422. The CMOS design provides a significant reduction in power consumption beyond its bipolar counterpart without sacrificing robustness against overload or ESD damage. Driver and receiver three-state output drivers, the output maintains high impedance over the entire common mode range. Excessive power consumption caused by bus contention or fault prevents the thermal shutdown circuit from forcing the driver output into a high-impedance state. The receiver has a fail-safe feature that guarantees a high output state when the input is suspended. The AC and DC specifications guarantee a supply voltage range from 0°C to 70°C and 4.75V to 5.25V.