IL3585 PROFIBUS Compatible Isolated RS485 Interface Functional Diagram Features * * * * * * * * * * * * VID (A-B) DE RE R D Mode 200 mV L L H X Receive -200 mV L L L X Receive 1.5 V H L H H Drive -1.5 V H L L L Drive X X H Z X Hi Z R 3.3 / 5 V Input Supply Compatible 2500 VRMS Isolation (1 min) 20 ns Propagation Delay 40 Mbps Data Rate 5 ns Pulse Skew 20 kV/us Transient Immunity Thermal Shutdown Protection -40C to +85C Temperature Range PROFIBUS Compliant 16 Pin SOIC Package UL1577 Approval Pending IEC 61010-1 Approval Pending Applications * * * * * * Security Networks ProfiBus DP and FMS Networks Building Environmental Controls Industrial Control Networks Gaming Systems Factory Automation Description The IL3585 is a galvanically isolated, high-speed differential bus transceiver, designed for bi-directional data communication on balanced transmission lines. Isolation is achieved through patented* Isoloop(R) technology. The IL3585 offers an exceptional 2.5 V differential output into a 54 load, which translates to better data integrity over longer cable lengths, even at data rates as high as 40 Mbps. The device is also compatible with 3.3V input supplies, allowing interface to standard microcontrollers without the need for additional level shifting components. The IL3585 has current limiting and thermal shutdown features to protect against output short circuits and bus contention situations which may cause excessive power dissipation. Isoloop(R) is a registered trademark of NVE Corporation. *U.S. Patent number 5,831,426; 6,300,617 and others. ISB-DS-001-IL612-A, January 20, 2005 NVE Corp., 11409 Valley View Road, Eden Prairie, MN 55344-3617, U.S.A. Telephone: 952-829-9217, Fax 952-829-9189, www.isoloop.com (c) 2005 NVE Corporation IL3585 Absolute Maximum Ratings(11) Parameters Storage Temperature Ambient Operating Temperature Voltage Range at A or B Bus Pins Supply Voltage (1) Digital Input Voltage Digital Output Voltage Symbol TS TA VDD1, VDD2 Min. -65 -40 -7 -0.5 -0.5 -0.5 Typ. Max. 150 100 12 7 VDD+0.5 VDD+1 Units C C V V V V Test Conditions Min. 3.0 4.5 Typ. Max. 5.5 5.5 12 -7 Units V Test Conditions Recommended Operating Conditions Parameters Supply Voltage Symbol VDD1 VDD2 VI VIC VIH Input Voltage at any Bus Terminal (separately or common mode) High-Level Digital Input Voltage Low-Level Digital Input Voltage Differential Input Voltage (2) High-Level Output Current (Driver) High-Level Digital Output Current (Receiver) Low-Level Output Current (Driver) Low-Level Digital Output Current (Receiver) Ambient Operating Temperature Digital Input Signal Rise and Fall Times VIL VID IOH IOH 2.4 3.0 V V -60 -8 0.8 +12/-7 60 8 V V mA mA IOL IOL -60 -8 60 8 mA mA TA tIR,tIF -40 85 C DC Stable Symbol Min. 8.077 VDD1= 3.3 V VDD1= 5.0 V Insulation Specifications Parameters Creepage Distance (external) Barrier Impedance || pF Leakage Current Typ. Max. >1014||7 0.2 Units Test Conditions ARMS 240 VRMS, 60 Hz Safety & Approvals IEC61010-1 Approval Pending TUV Certificate Numbers: Classification Model IL3585 Package SOIC (0.3") Pollution Degree II Material Group III Max. Working Voltage 300 VRMS UL 1577 Component Recognition program. File #: Rated 2500VRMS for 1 minute (SOIC) Approval Pending Electrostatic Discharge Sensitivity This product has been tested for electrostatic sensitivity to the limits stated in the specifications. However, NVE recommends that all integrated circuits be handled with appropriate care to avoid damage. Damage caused by inappropriate handling or storage could range from performance degradation to complete failure. IL3585 Pin Connections 1 VDD1 Input Power Supply 2 GND1 Input Power Supply Ground Return. (Pin 2 is internally connected to Pin 8) 3 R 4 RE Read Data Enable (if RE is high, R= high impedance) 5 DE Drive Enable Output Data from Bus 6 D 7 NC Data Input to Bus 8 GND1 Input Power Supply Ground Return. (Pin 8 is internally connected to Pin 2) 9 GND2 Output Power Supply Ground Return. (Pin 9 is internally connected to Pin 15) 10 ISODE Isolated DE Output for us in Profibus applications where the state of the isolated drive enable node needs to be monitored. 11 NC 12 A Non-inverting bus line 13 B Inverting bus line 14 NC 15 GND2 Output Power Supply Ground Return. (Pin 15 is internally connected to Pin 9) 16 VDD2 Output Power Supply No Internal Connection No Internal Connection No Internal Connection IL3585 Driver Section Electrical Specifications are Tmin to Tmax unless otherwise stated. Parameters Symbol Min. Input Clamp Voltage VIK Output voltage VO Differential Output Voltage(2) |VOD1| Differential Output Voltage(2) |VOD2| 2.5 Differential Output Voltage(2)(6) VOD3 2.3 Change in Magnitude of Differential |VOD| Output Voltage(7) Common Mode Output Voltage VOC Change in Magnitude of Common |VOC| Mode Output Voltage(7) Output Current(4) IO High Level Input Current Low Level Input Current Absolute |Short-circuit Output Current| Supply Current (V DD2 = +5 V) (V DD1 = +5 V) (V DD1 = +3.3 V) IIH IIL IOS IDD2 IDD1 IDD1 Parameters Maximum Data Rate Differential Output Prop Delay Pulse Skew(10) Differential Output Rise & Fall Time Output Enable Time To High Level Output Enable Time To Low Level Output Disable Time From High Level Output Disable Time From Low Level Skew Limit(3) Symbol tD(OD) tS(P) tT(OD) tPZH tPZL tPHZ tPLZ tSK(LIM) Typ.(5) 3 60 5 4 3 Switching Specifications Min. Typ.(5) 40 20 1 5 20 20 20 20 2 Max. -1.5 VDD VDD 5 5 0.2 Units V V V V V V 3 0.2 V V 1 -0.8 10 -10 250 8 6 4 mA A A A mA VO = -7 V1 = 3.5 V V1 = 0.4 V -7 V> VO <12 V No Load (Outputs Enabled) Max. Units Mbps ns ns ns ns ns ns ns ns Test Conditions RL = 54 , CL = 50 pF RL = 54 , CL = 50 pF RL = 54 , CL = 50 pF RL = 54 , CL = 50 pF RL = 54 , CL = 50 pF RL = 54 , CL = 50 pF RL = 54 , CL = 50 pF RL = 54 , CL = 50 pF RL = 54 , CL = 50 pF 30 6 8 30 30 30 30 12 Test Conditions IL = -18 mA IO = 0 IO = 0 RL = 54 , VDD = 5 V RL = 54 , VDD = 4.5 V RL = 54 or 100 RL = 54 or 100 RL = 54 or 100 Output Disabled, VO = 12 Notes: These apply to both driver and receiver sections 1. All Voltage values are with respect to network ground except differential I/O bus voltages. 2. Differential input/output voltage is measured at the noninverting terminal A with respect to the inverting terminal B. 3. Skew limit is the maximum propagation delay difference between any two devices at 25C. 4. The power-off measurement in ANSI Standard EIA/TIA-422-B applies to disabled outputs only and is not applied to combined inputs and outputs. 5. All typical values are at VDD1,VDD2 = 5 V or VDD1= 3.3 V and TA = 25C. 6. While -7 V<VCM>12 V, the minimum VOD2 with a 54 load is either 1/2 VOD1 or 2.3 V, whichever is greater. 7. |VOD| and |VOC| are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed form one logic state to the other. 8. This applies for both power on and power off, refer to ANSI standard RS-485 for exact condition. The EIA/TIA-422-B limit does not apply for a combined driver and receiver terminal. 9. Includes 10 ns read enable time. Maximum propagation delay is 25 ns after read assertion. 10. Pulse skew is defined as the |tPLH -tPHL| of each channel. 11. Absolute Maximum specifications mean the device will not be damaged if operated under these conditions. It does not guarantee performance. IL3585 Receiver Section Electrical Specifications are Tmin to Tmax unless otherwise stated. Parameters Symbol Min. Positive-going Input Threshold VIT+ Voltage Negative-going Input Threshold VIT-0.2 Voltage Hysteresis Voltage (VIT+ - VIT-) VHYS High Level Digital Output Voltage VOH VDD - 0.2 Typ.(5) Max. 0.2 40 VDD Units V Test Conditions -7 V>VCM<12 V V -7 V>VCM<12 V mV V Low Level Digital Output Voltage VOL 0.2 V High-impedance-state output current IOZ 1 A Line Input Current(8) II 1 -0.8 mA mA k mA Input Resistance Supply Current (V DD2 = +5V) (V DD1 = +5V) (V DD1 = +3.3V) Parameters Maximum Data Rate Propagation Delay(9) Pulse Skew(10) Skew Limit(3) Output Enable Time To High Level Output Enable Time To Low Level Output Disable Time From High Level Output Disable Time From Low Level Parameters Maximum Data Rate Propagation Delay(9) Pulse Skew(10) Skew Limit(3) Output Enable Time To High Level Output Enable Time To Low Level Output Disable Time From High Level Output Disable Time From Low Level RI IDD2 IDD1 IDD1 20 5 4 3 Switching Characteristics @ 5 V Symbol Min. Typ.(5) 40 tPD 27 tSK(P) 1 tSK(LIM) 2 tPZH 15 tPZL 15 tPHZ 15 tPLZ 15 Switching Characteristics @ 3.3 V Symbol Min. Typ.(5) 40 tPD 30 8 6 4 Max. 35 Units Mbps ns 6 ns 12 25 25 25 25 ns ns ns ns ns Max. 38 Units Mbps ns tSK(P) 1 6 ns tSK(LIM) tPZH tPZL tPHZ tPLZ 4 17 17 17 17 12 27 27 27 27 ns ns ns ns ns VCM =0 V, T=25C VID = 200 mV IOH = -20 A VID = -200 mV IOH = 20 A VO = 0.4 to (VDD2 - 0.5) V VI = 12 V VI = -7 V No load Outputs Enabled Test Conditions RL = 54 , CL = 50 pF VO = -1.5 to 1.5 V, CL = 15 pF VO = -1.5 to 1.5 V, CL = 15 pF RL = 54 , CL = 50 pF CL = 15 pF CL = 15 pF CL = 15 pF CL = 15 pF Test Conditions RL = 54 , CL = 50 pF VO = -1.5 to 1.5 V, CL = 15 pF VO = -1.5 to 1.5 V, CL = 15 pF RL = 54 , CL = 50 pF CL = 15 pF CL = 15 pF CL = 15 pF CL = 15 pF IL3585 Power Consumption Isoloop devices achieve their low power consumption by detecting the edge transitions of the input logic signal and converting these to narrow current pulses. This technique creates a supply current which is proportional to data rate, which has obvious advantages over optocouplers whose power consumption is dependent on mark:space ratio. Table 2. Typical Dynamic Supply Currents. Data Rate (Mbps) 1 10 20 40 IDD1 300 A 3 mA 6 mA 12 mA IDD2 300 A 3 mA 6 mA 12 mA Power Supplies It is required that low ESR capacitors such as ceramic are used to decouple the supplies. Both VDD1 and VDD2 must be bypassed with 47 nF capacitors. These should be placed as close as possible to VDD pins for proper operation. In addition, V DD2 should have a 10 F tantalum capacitor connected in parallel with the 47 nF capacitor. DC Correctness The IL3585 incorporates a patented refresh circuit which effectively maintains the correct output state with respect to data input. At power up, the bus outputs will follow the Function Table shown on Page 1. It is recommended that the DE input is always held low during power up to eliminate false drive data pulses from the bus. The use of an external power supply monitor to minimize glitches caused by slow power-up and power-down transients is not required. Application Information_______________________ Receiver Features The IL3585 receiver includes a "fail-safe if open" function that guarantees a high level receiver output if the receiver inputs are unconnected (floating). IL3585 receiver outputs have tri-state capability via the active low RE input. Driver Features The RS-485 driver is a differential output device that delivers at least 1.5 V across a 54 load. The drivers feature low propagation delay skew to maximize bit width and to minimize EMI. The IL3585 drivers have tri-state capability via the active high DE input. Receiver Data Rate, Cables and Terminations This device is intended for network lengths up to 4000', but the maximum system data rate decreases as the transmission line length increases. Twisted pair cable should be used in all networks since they tend to pick up noise and other electromagnetically induced voltages as common mode signals, which are effectively rejected by the differential receivers in these ICs. 6 NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax (952) 829-9189 Internet: www.isoloop.com IL3585 IL3585 (0.3'' SOIC-16 Package) Ordering Information and Valid part Numbers 7 NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax (952) 829-9189 Internet: www.isoloop.com IL3585 About NVE An ISO 9001 Certified Company NVE Corporation is a high technology components manufacturer having the unique capability to combine leading edge Giant Magnetoresistive (GMR) materials with integrated circuits to make high performance electronic components. Products include Magnetic Field Sensors, Magnetic Field Gradient Sensors (Gradiometer), Digital Magnetic Field Sensors, Digital Signal Isolators and Isolated Bus Transceivers. NVE is a leader in GMR research and in 1994 introduced the world's first products using GMR material, a line of GMR magnetic field sensors that can be used for position, magnetic media, wheel speed and current sensing. NVE is located in Eden Prairie, Minnesota, a suburb of Minneapolis. Please visit our Web site at www.nve.com or call 952-829-9217 for information on products, sales or distribution. NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.nve.com e-mail: isoinfo@nve.com The information provided by NVE Corporation is believed to be accurate. However, no responsibility is assumed by NVE Corporation for its use, nor for any infringement of patents, nor rights or licenses granted to third parties, which may result from its use. No license is granted by implication, or otherwise, under any patent or patent rights of NVE Corporation. NVE Corporation does not authorize, nor warrant, any NVE Corporation product for use in life support devices or systems or other critical applications. The use of NVE Corporation's products in such applications is understood to be entirely at the customer's own risk. Specifications shown are subject to change without notice. ISB-DS-001-IL3585-B January 26, 2005 8 NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax (952) 829-9189 Internet: www.isoloop.com