DS3695ATM Datasheet

Interface - Drivers, Receivers, Transceivers


The DS3695ATM and DS3696A are high speed differentialTRI-STATE® bus/line transceivers designed to meet the requirementsof EIA standard RS485 with extended commonmode range (+12V to −7V), for multipoint data transmission.In addition they are compatible with requirements of RS-422.The driver and receiver outputs feature TRI-STATE capability.The driver outputs remain in TRI-STATE over the entirecommon mode range of +12V to −7V. Bus faults that causeexcessive power dissipation within the device trigger a thermalshutdown circuit, which forces the driver outputs into thehigh impedance state. The DS3696A provides an output pin(TS) which reports the thermal shutdown of the device. TS isan “open collector” pin with an internal 10 kW pull-up resistor.This allows the TS outputs of several devices to be wireOR-ed.Both AC and DC specifications are guaranteed over the 0°Cto 70°C temperature and 4.75V to 5.25V supply voltagerange. DS3695ATM Features • Meets EIA standard RS485 for multipoint bustransmission and is compatible with RS-422• 10 ns driver propagation delays (typical)• Single +5V supply• −7V to +12V bus common mode range permits ±7Vground difference between devices on the bus• Thermal shutdown protection• High impedance to bus with driver in TRI-STATE or withpower off, over the entire common mode range allowsthe unused devices on the bus to be powered down• Combined impedance of a driver output and receiverinput is less than one RS485 unit load, allowing up to 32transceivers on the bus• 70 mV typical receiver hysteresis• Available in SOIC packaging


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