NM485D6S5MC www.murata-ps.com Isolated RS485 Driver DC-DC 6V 5V 6V 5V regulated 5V Regulator 0V 0V Isolated DC-DC Power Supply 0V -6V -6V 3.3V Vcc Regulator 0V Isolated 485 Transceiver input lines output lines FEATURES output lines input lines Patent pending ANSI/AAMI ES60601-1, 2 MOOP/1 MOPP SELECTION GUIDE recognised 1 Order Code NM485D6S5MC UL60950 recognised for 250Vrms reinforced MODULE CHARACTERISTICS insulation DRIVER SMD compatible Parameter Test conditions Min. Typ. Max. Units Symbol +6V, -6V unregulated and +5V regulated Differential Output Loaded RL = 100 (RS-422), See Figure 1 2.0 3.6 VVOD isolated outputs Voltages Loaded RL = 54 (RS-485) 1.5 3.6 Short Circuit Output 250 mA IOS Differential driver and receiver Current Complementary 500kbps data rate RL = 54 or 100, see figure 1 0.2 V VOD Output States Complies with ANSI TIA/EIA RS-485-A-1998 Common-mode RL = 54 or 100, see figure 1 3.0 V VOC and ISO 8482: 1987(E) Output Voltages Complementary Industrial temperature range -40C to RL = 54 or 100, see figure 1 0.2 V VOC Output States +85C 0.25 x Input Threshold Low VVIL Vcc Tested at 3000Vac rms Hi Pot Test Input Threshold High 0.7 x V VIH Input Current -10 +0.01 +10 A II PRODUCT OVERVIEW 2 RECEIVER The NM485D6S5MC is a low power electrically Parameter Test conditions Min. Typ. Max. Units Symbol isolated differential driver and receiver designed Differential Input for bi-directional data communication or multipoint -7V < VCM < +12V -200 -125 -30 mV VTH Threshold Voltages bus transmission. The device combines a tri-state Input Voltages differential line driver and a differential input line VOC = 0V 15 mV VHYS Hysteresis receiver. The driver and receiver have active high Input Current (A, B) -100 +125 A II and active low enables, respectively, which can be Line Input Resistance -7V < VCM < +12V 96 k RIN connected together to function as direction control. Tristate Leakage 1 A IOZR No external components are needed as a single Current 5V supply powers all functions either side of the Output Voltage Low 0.2 0.4 V VOLRxD isolation boundary. NM485D655MC also provides Vcc - Vcc - Output Voltage High VVOHRxD 0.3 0.2 a regulated 5V, unregulated 6V and -6V isolated Short-Circuit Current 100 mA supplys for system use. Common-Mode VCM = 1 kV, transient magnitude = 800V 25 KV/S Transient Immunity ABSOLUTE MAXIMUM RATINGS Supply voltage VCC with respect to pin 11 6V Bus Terminal Voltages -9V to +14V Logic Terminal Voltage -0.5V to Vcc +0.5V Data transmission rate 500Kbps 1. Components are supplied in tape and reel packaging, please refer to tape and reel specication section. Orderable part numbers are NM485D6S5MC-R7 (80 pieces per reel), or NM485D6S5MC-R13 (350 pieces per reel). 2. VCM is the common-mode potential difference between the logic and bus sides. The transient magnitude is the range over which the For full details go to common mode is slewed. The common-mode voltage slew rates apply to both rising and falling common-mode voltage edges. www.murata-ps.com/rohs All specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied. www.murata-ps.com/support KDC NM485D6S5MC.B03 Page 1 of 11 Isolation NM485D6S5MC Isolated RS485 Driver DC-DC TIMING SPECIFICATIONS Parameter Test conditions Min. Typ. Max. Units Symbol Driver Propagation Delay RL = 54, CL1 = CL2 = 100 pF see figure 2 & 6 250 700 ns tDPLH, tDPHL Differential Driver Output Skew RL = 54, CL1 = CL2 = 100 pF see figure 2 & 6 100 ns TDSKEW Rise Time/Fall Time RL = 54, CL1 = CL2 = 100 pF see figure 2 & 6 200 450 1100 ns TDR, TDF Enable Time RL = 110, CL1 = 50 pF see figure 4 & 7 1.5 s TZL, TZH Disable Time RL = 110, CL1 = 50 pF see figure 4 & 7 200 ns TLZ, THZ Receiver Propagation Delay CL1 = 15 pF see figure 3 & 8 200 ns TPLH, TTPHL Pulse Width Distortion CL1 = 15 pF see figure 3 & 8 30 ns TPWD Enable Time RL = 1k, CL1 = 15 pF see figure 5 & 9 13 ns TZL, TZH Disable Time RL = 1k, CL1 = 15 pF see figure 5 & 9 13 ns TLZ, THZ FIGURE 1 FIGURE 2 FIGURE 3 DRIVER TEST CIRCUIT DRIVER TEST CIRCUIT RECEIVER TEST CIRCUIT (For output voltage levels) (For timing characteristics) (For timing characteristics) A RL CL1 2 vout Y VOD RL CL B Z RL CL2 2 FIGURE 4 FIGURE 5 FIGURE 6 DATA ENABLE TEST CIRCUIT READ ENABLE TEST CIRCUIT DRIVER TIMING (For signal propagation) VDD1 VDD1/2 VDD1/2 +1.5v VOUT VCC 0V VCC S1 tDPLH tDPLH Y RL -1.5v RL 0V or 3V S1 S2 Z RE S2 CL CL 1/2VO Z vout VO DE Y RE IN +VO 90% POINT VDIFF=V(Y)-V(Z) 90% POINT VDIFF 10% POINT 10% POINT -VO tDR tDF FIGURE 7 FIGURE 8 FIGURE 9 DATA ENABLE TIMING SPECIFICATION RECEIVER TIMING READ ENABLE TIMING SPECIFICATION vDD1 vDD1 RE 0.5VDD1 0.5VDD1 DE 0.5VDD1 0.5VDD1 0V A, B 0V 0V 0V tZL tLZ tZL tLZ tPLH tPHL RxD 1.5V Y, Z 2.3V VOH VOL +0.5V VOL VOL +0.5V RXD 1.5V 1.5V VOL tZH tHZ VOL tZH tHZ VOH VOH -0.5V VOH RxD VOH -0.5V 1.5V Y, Z 2.3V 0V 0V 0V www.murata-ps.com/support KDC NM485D6S5MC.B03 Page 2 of 11