IL3185/IL3122 Low Cost Passive Input RS-485 and RS-422 Isolated Transceivers Functional Diagrams Features 5 Mbps data rate 3 V to 5 V power supplies DE Supports up to 32 nodes V COIL1 15 kV bus ESD protection 2500 V isolation per UL 1577 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 IL3185 DE Applications V COIL1 P.O.S. systems Y Security networks Z D Building environmental controls V COIL2 Industrial control networks R A Gaming systems B Factory automation RE IL3122 Description The IL3185 and IL3122 are galvanically isolated, differential IL3185 Truth Table bus transceivers designed for bidirectional data V DE D R RE Mode (A-B) communication over balanced transmission lines. The 200 mV H H H L Drive devices use NVEs patented* IsoLoop spintronic Giant 200 mV H L L L Drive Magnetoresistance (GMR) technology. The IL3185 delivers 200 mV L X H L Receive at least 1.5 V into a 54 load, and the IL3122 at least 2 V 200 mV L X L L Receive X X X Z H X into a 100 load for excellent data integrity over long Open L X H L Receive cables. These devices are also compatible with 3 V input Z = High Impedance X = Irrelevant supplies, allowing interface to standard microcontrollers without additional level shifting. IL3122 Receiver IL3122 Driver RE R V DE D V (A-B) (Y-Z) Both the IL3185 and IL3122 have current limiting and H Z X L X Z thermal shutdown features to protect against output short L H 200 mV H H 200 mV circuits and bus contentions that may cause excessive power L L 200 mV H L 200 mV dissipation. The receivers also incorporate a fail-safe if L H Open open design, ensuring a logic high on R if the bus lines are disconnected or floating. Selection Table Data Full/Half No. of Devices Rate Model Duplex Allowed on Bus Mbps Fail-Safe IL3185 half 32 5 yes IL3122 full 32 5 yes IsoLoop is a registered trademark of NVE Corporation. REV. P *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 IL3185/IL3122 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 High I 1.5 0.8 mA INH 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 Per IEC 60601 (external) 0.3 SOIC 8.03 8.3 Total Barrier Thickness (internal) 0.012 0.013 mm (5) 14 Barrier Resistance R >10 500 V IO (5) 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 Fax: (952) 829-9189 www.IsoLoop.com NVE Corporation