NM485SLC

NM485SLC www.murata-ps.com Low Power Isolated EIA-485 Driver and Receiver ELECTRICAL CHARACTERISTICS Parameter Supply voltage, VCC Isolated reference voltage, VREF +VREF Current High level input voltage, VIH Low level input voltage, VIL Common mode output voltage, VOC High level output current IOH Low level output current, IOL Common mode input voltage, VIC Differential input voltage, VID High level output current, IOH Low level output current, IOL FEATURES „ RoHS compliant „ Site compatible with NM485D „ Single 5V supply „ Thermal shutdown protection „ EIA-485 and CCITT V.10 & V.11 compatible „ Differential driver and receiver „ Driver tri-state outputs active high enable D ENABLE, R ENABLE and DIN Max. 5.0 5.25 5.0 25 Units V 0.8 12 -60 60 ±12 ±12 -5.0 25 mA V V V mA mA V V mA mA Max. Units 0.2 V V mV V V 2.8 -7.0 Driver Receiver Test conditions High threshold differential input, VTH Low threshold differential input, VTL Input hysteresis, ΔVT High level output voltage, VOH Low level output voltage, VOL VO=2.7V, IO=-0.4mA VO=0.5V, IO=16mA „ 1kVrms Isolation Short circuit output current, IOS Input resistance, RI The NM485SLC is a low power electrically isolated differential driver and receiver designed for bi-directional data communication or multipoint bus transmission at rates up to 2.5Mbits per second. The device combines a tri-state differential line driver and a differential input line receiver. The driver and receiver have active high and active low enables, respectively, which can be connected together to function as direction control. The receiver features a high output state when the inputs are left open. Thermal shutdown protection forces the driver into a high impedance state, under line fault conditions. No external components are needed as a single 5V supply powers all functions either side of the isolation boundary. The device is supplied in a low profile 24 pin plastic package. Typ. RL=54Ω Parameter Line input current, II DESCRIPTION Min. 4.75 RECEIVER ELECTRICAL CHARACTERISTICS „ Low Profile 24 pin DIL package style „ Thermal shutdown protection Test conditions Min. Typ. -0.2 70 VID=200mV, IOH=-5.0mA VID=-200mV, IOL=25mA Other input at 0V, VI=12V Other input at 0V, VI=-7.0V 2.7 0.8 1.0 -0.8 85 12 mA mA KΩ RECEIVER SWITCHING CHARACTERISTICS Parameter Test conditions Propagation delay time L to H, TPLH Propagation delay time H to L, TPHL Output disable time from high level Output disable time from low level Output enable time to high level Output enable time to low level VID=-1.5V to 1.5V, CL=15pF Min. CL=15pF CL=15pF CL=15pF CL=15pF Typ. Max. Units 150 130 90 90 130 80 180 150 150 150 150 150 ns ns ns ns ns ns RECEIVER FUNCTION TABLE Differential inputs A-B R ENABLE ROUT VID≥0.2V -0.2V