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| Isolated RS485 Interface with Handshake IL485W The IL485W is a galvanically isolated, highspeed differential bus transceiver, designed for bi-directional data communication on balanced transmission lines. The IL485W uses patented IsoLoop(R) technology and is the first isolated RS-485 interface available in a standard 16 pin SOIC package, which meets the ANSI Standards EIA/TIA-422-B and RS485. The IL485W has current limiting and thermal shutdown features to protect against output short circuits and bus contention situations where these may cause excessive power dissipation. With a 1 nsec pulse skew and 16 nsec propagation delay, the IL485W is ideal for PROFIBUS applications. Use of DE/ISODE and IN1/OUT1 allows the IL485W to perform the handshaking operations of RTSAS and DTSAS of PROFIBUS. Function Table VID (A-B) 0.2V -0.2V -7 * 2500 Vrms Isolation (1 min) * 25 ns Maximum Propagation Delay * 35 MBaud Data Rate * 1 ns Pulse Skew (typ.) * Designed for Multi-point Transmission on Long Bus * * * * * * * * * * * Lines in Noisy Environments 60 mA Driver Output Capability Thermal Shutdown Protection Meets or Exceeds ANSI RS-485 and ISO 8482:1987 (E) -40C to +85C Temperature Range 16 Pin SOIC Package PROFIBUS International Component Recognition UL1577 Approval (pending) IEC 61010-1 Approval (pending) Dimensions in mm Applications PROFIBUS/RS485 RS-485 Systems Multiple Data Point Transmission PROFIBUS Fault Interrogation Functional Diagram (IL485W) Tel: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255 Germany: +49 (0) 692 199 8606 Fax: +49 (0) 692 199 8595 Email: sales@rhopointcomponents.com Website: www.rhopointcomponents.com Rhopoint Components Ltd Pin Configuration (IL485W) Insulation Specifications PARAMETERS Creepage Distance (External) Barrier Impedance Leakage Current 240VRMS 60Hz CONDITION MIN. 8.077 >1014|| 7 0.2 || pF Amps TYP. MAX. UNITS mm Recommended Operating Conditions PARAMETERS Supply Voltage Input Voltage at any bus terminal (separately or common mode) High-Level Digital Input Voltage Low-Level Digital Input Voltage Differential Input Voltage (2) SYMBOL VDD1, VDD2 VI VIC VIH VIL V ID 3 0.8 +12/ - 7 -60 MIN. 4.5 MAX. 5.5 12 -7 Volts Volts Volts Volts mA UNITS Volts Pin Connections (IL485W) 1 2 3 4 5 6 7 8 9 10 VDD1 GND 1 R OUT 1 RE DE D GND 1 GND 2 ISODE Input Power Supply Input Power Supply Ground Return Output Data from Bus Output from Auxiliary Isolation Channel Read Data Enable (If RE is high, R = High Impedance) Drive Enable Data Input to Bus Input Power Supply Ground Return Output Power Supply Ground Return Isolated DE Output for use in Profibus applications where the state of the drive enable node needs to be monitored Input to the Auxiliary Isolation Channel `A' Bus (Receive- True) `B' Bus (Receive - Inverse) No Internal Connection Output Power Supply Return Output Power Supply High-Level Output Current (Driver) High-Level Digital Output Current (Receiver) Low-Level Output Current (Driver) Low-Level Digital Output Current (Receiver) Operating Free Air Temperature Digital Input Signal Rise and Fall Times I OH I OH I OL 8 60 mA mA I OL TA -40 8 85 mA C t IR , tIF DC Stable IEC61010-1 TUV Certificate Numbers: Pending Classifications as Table 1 MODEL POLLUTION DEGREE II MATERIAL GROUP III MAX WORKING VOLTAGE 300VRMS PACKAGE TYPE 16-SOIC (7.5mm) u 11 12 13 14 15 16 IN 1 A B n/c GND 2 VDD2 IL485W Absolute Maximum Ratings PARAMETERS Storage Temperature Ambient Operating Temperature Voltage Range at A or B Bus Pins Supply Voltage(1) Digital Input Voltage Digital Output Voltage Continuous Total Power Dissipation Maximum Output Current Lead Solder Temperature (10s) ESD 2kV Human Body Model (25C) (85C) IO VDD1 , VDD2 SYMBOL TS TA MIN. -65 -40 -7 -0.5 -0.5 -0.5 MAX. 150 85 12 7 5.5 VDD +0.1 725 377 95 260 UNITS C C Volts Volts Volts Volts mWatts mWatts mA C UL 1577 Component Recognition Program. File # Pending Rated 2500VRMS for 1 min. Tel: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255 Germany: +49 (0) 692 199 8606 Fax: +49 (0) 692 199 8595 Email: sales@rhopointcomponents.com Website: www.rhopointcomponents.com Rhopoint Components Ltd Driver Section Specifications All Specifications are T min to Tmax unless otherwise stated PARAMETERS Input Clamp Voltage Output Voltage Differential Output Voltage Differential Output Voltage (6) Differential Output Voltage Change in Magnitude of (7) Differential Output Voltage Common Mode Output Voltage Change in Magnitude of (7) Common Mode Output Voltage Output Current (4) High Level Input Current Low Level Input Current Short-Circuit Output Current I OS Supply Current Switching Characteristics Maximum Data Rate Differential Output Delay Time Pulse Skew (10) Differential Output Transition 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) t D (OD) t SK (P) t T (OD) t PZH t PZL t PHZ t PLZ t SK (LIM) 35 16 1 8 31 22 28 16 2 25 6 10 65 35 50 32 8 Mbd ns ns ns ns ns ns ns ns R L = 54 , CL = 50pF R L = 54 , CL = 50pF R L = 54 , CL = 50pF R L = 54 , CL = 50pF R L = 54 , CL = 50pF R L = 54 , CL = 50pF R L = 54 , CL = 50pF R L = 54 , CL = 50pF R L = 54 , CL = 50pF (V DD2 = +5V) (V DD1 = +5V) I DD2 I DD1 27 5 |VOC| IO I IH I IL 0.2 1 -0.8 10 -10 -250 -150 250 34 10 V mA mA A A mA mA mA mA mA R L = 54 or 100 Output Disabled VO = 12 VO = -7 VI = 3.5V VI = 0.4V VO = -6 VO = 0 VO = 8 No Load (Outputs Enabled) SYMBOL VIK VO MIN. 0 1.5 1.5 1.5 2.5 TYP. (5) MAX. -1.5 6 6 5 5 0.2 3 -1 UNITS V V V V V V V TEST CONDITIONS IL = -18mA IO = 0 IO = 0 R L = 54 Vtest = -7 to 12V R L = 54 or 100 R L = 54 or 100 | VOD1| | VOD2| VOD3 |VOD| VOC Notes 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/Y with respect to the inverting terminal B/Z. 3. Skew limit is the maximum difference in any two channels in one device. 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 = 5V and T A = 25C. 6. The minimum V OD2 with a 100 load is either 1/2VOD1 or 2V, whichever is greater. 7. | VOD | and | VOC | are the changes in magnitude of V OD and V OC , 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 8 ns read enable time. Maximum propagation delay is 25 ns after read assertion. 10. Pulse skew is defined as the |t PLH -tPHL| of each channel. Tel: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255 Germany: +49 (0) 692 199 8606 Fax: +49 (0) 692 199 8595 Email: sales@rhopointcomponents.com Website: www.rhopointcomponents.com Rhopoint Components Ltd Receiver Section Specifications All Specifications are Tmin to Tmax unless otherwise stated PARAMETERS Positive-going Input Threshold Voltage Negative-going Input Threshold Voltage Hysteresis Voltage VIT + V IT High Level Digital Output Voltage Low Level Digital Output Voltage High-Impedance-State Output Current Line Input Current (8) Input Resistance Supply Current Switching Characteristics Maximum Data Rate Propagation Time (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 35 t PD t SK(P) t SK(lim) t PZH t PZL t PHZ t PLZ 24 1 2 17 30 30 18 32 6 8 24 45 45 27 Mbd ns ns ns ns ns ns ns R L = 54 , CL = 50pF VO = -1.5 to 1.5V, CL = 15pF VO = -1.5 to 1.5V, CL = 15pF R L = 54 , CL = 50pF C L = 15pF C L = 15pF C L = 15pF C L = 15pF ( VDD2 = +5) ( VDD1 = +5) SYMBOL VIT+ VITVhys VOH VO L I OZ II rI I DD2 I DD1 50 27 5 34 10 MIN. -0.2 60 V DD -0.2 0.2 20 1 -0.8 k mA mA No Load (Outputs Enabled) TYP. (5) MAX. 0.2 UNITS V V mV V V A mA VID = 200mV, IOH = -20A VID = -200mV, IO L = 20A VO = 0.4 to (VDD2 -0.5) V Other Input - 0V V I = 12V V I = -7V TEST CONDITIONS VO = 2.7V, IO = -0.4mA VO = 0.5V, IO = 8mA Tel: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255 Germany: +49 (0) 692 199 8606 Fax: +49 (0) 692 199 8595 Email: sales@rhopointcomponents.com Website: www.rhopointcomponents.com Rhopoint Components Ltd |
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