IL3285/IL3222 Fractional Load Passive Input RS-485 and RS-422 Isolated Transceivers Functional Diagrams Features 3 V to 5 V power supplies 5 Mbps data rate DE unit load V COIL1 15 kV bus ESD protection 2,500 V isolation (1 minute) RMS D 20 kV/s typical common mode rejection V No carrier or clock for low EMI emissions and susceptibility COIL2 R A 40C to +85C temperature range B Thermal shutdown protection RE UL 1577 recognized IEC 60747-5-5 (VDE 0884) certified 0.15 , 0.3 , or True 8 mm 16-pin SOIC packages IL3285 DE Applications High node-count networks V COIL1 Security networks Y Building environmental controls Z D Industrial control networks V COIL2 Gaming systems R A B RE Description The IL3285 and IL3222 are galvanically isolated, IL3222 differential bus transceivers designed for bidirectional data communication over balanced transmission lines. The IL3285 Truth Table devices use NVEs patented* IsoLoop spintronic Giant V DE D R RE Mode (A-B) Magnetoresistance (GMR) technology. The IL3285 delivers 200 mV H H H L Drive at least 1.5 V into a 54 load, and the IL3222 at least 2 V 200 mV H L L L Drive into a 100 load for excellent data integrity over long 200 mV L X H L Receive cables. These devices are also compatible with 3.3 V input 200 mV L X L L Receive supplies, allowing interface to standard microcontrollers X X X Z H X without additional level shifting. Open L X H L Receive Z = High Impedance X = Irrelevant A unique ceramic/polymer composite barrier provides excellent isolation and virtually unlimited barrier life. IL 3222 Receiver IL3222 Driver Both the IL3285 and IL3222 have current limiting and RE R V DE D V (A-B) (Y-Z) thermal shutdown features to protect against output short H Z X L X Z circuits and bus contentions that may cause excessive power L H 200 mV H H 200 mV dissipation. The receivers also incorporate a fail-safe if L L 200 mV H L 200 mV open design, ensuring a logic high on R if the bus lines are L H Open disconnected or floating. Selection Table Receiver input resistance of 96 k is eight times the RS-485 Full/Half No. of Devices Data Rate Unit Load (UL) minimum of 12 k . Thus these products Model Duplex Allowed on Bus Mbps Fail-Safe are known as one-eighth UL transceivers. There can be up IL3285 half 256 5 yes to 256 on a network while still complying with the RS-485 IL3222 full 256 5 yes loading specification. IsoLoop is a registered trademark of NVE Corporation. REV. Q *U.S. Patent numbers 5,831,426 6,300,617 and others. NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.isoloop.com iso-info nve.com NVE Corporation IL3285/IL3222 Absolute Maximum Ratings Operating at absolute maximum ratings will not damage the device. However, extended periods of operation at the absolute maximum ratings may affect performance and reliability. Parameters Symbol Min. Typ. Max. Units Test Conditions Storage Temperature T 55 150 C S Ambient Operating Temperature T 40 85 C A Voltage Range at A or B Bus Pins 7 12 V (1) Supply Voltage V , V 0.5 7 V DD1 DD2 Digital Input Voltage 0.5 V+0.5 V DD Digital Output Voltage 0.5 V+1 V DD ESD Protection 15 kV Input Current I 25 +25 mA IN ESD (all bus nodes) 15 kV HBM Note 1. All voltage values are with respect to network ground except differential I/O bus voltages. Recommended Operating Conditions Parameters Symbol Min. Typ. Max. Units Test Conditions 3.0 V 5.5 DD1 Supply Voltage V V 4.5 5.5 DD2 Ambient Operating Temperature T 40 85 C A Input Voltage at any Bus Terminal V 12 I V (separately or common mode) V 7 IC Input Threshold for Output Logic I 1.5 0.8 mA INH High Input Threshold for Output Logic Low I 5 3.5 mA INL Differential Input Voltage V +12/ 7 V ID High-Level Output Current (Driver) I 60 60 mA OH High-Level Digital Output Current I 8 8 mA OH (Receiver) Low-Level Output Current (Driver) I 60 60 mA OL Low-Level Digital Output Current I 8 8 mA OL (Receiver) Ambient Operating Temperature T 40 85 C A Digital Input Signal Rise, Fall Times t ,t 1 s IR IF Insulation Specifications Parameters Symbol Min. Typ. Max. Units Test Conditions Comparative Tracking Index CTI 175 V Per IEC 60112 Endurance Voltage AC 1000 V RMS At maximum (Maximum Working Voltage V IO operating temperature for Indefinite Life) DC 1500 V DC Creepage Distance 0.15 SOIC 4.03 mm (external) 0.3 SOIC 8.03 8.3 Per IEC 60601 Total Barrier Thickness (internal) 0.012 0.013 mm 14 Barrier Resistance R >10 500 V IO Barrier Capacitance C 7 pF f = 1 MHz IO Leakage Current 0.2 A 240 V , 60 Hz RMS 2 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 www.isoloop.com iso-info nve.com NVE Corporation