DUAL CHANNEL ILD255 BIDIRECTIONAL INPUT OPTOCOUPLER FEATURES • AC or Polarity Insensitive Inputs • Continuous Forward Current, 130 mA • Applications—Telecommunications - Ring Detection - Loop Current Detector • Built-in Reverse Polarity Input Protection • Improved CTR Symmetry • Industry Standard DIP Package • Underwriters Lab File #E52744 • V VDE 0884 Available with Option 1 Dimensions in inches (mm) 4 3 2 1 Pin One I.D. Anode/ Cathode Cathode/ Anode Anode/ Cathode Cathode/ Anode .268 (6.81) .255 (6.48) 5 6 7 8 1 8 Emitter 2 7 Collector 3 6 Collector 4 5 Emitter .390 (9.91) .379 (9.63) D E DESCRIPTION The ILD255 is a bidirectional input optically coupled isolator consisting of two high current Gallium Arsenide infrared LEDs coupled to a silicon NPN phototransistor per channel. The ILD255 has a minimum CTR of 50% These optocouplers are ideal for applications requiring AC signal detection and monitoring. Maximum Ratings (Each Channel) Emitter Peak Pulsed Current (1 µs, 300 pps)................. 3 A Continuous Forward Current...............130 mA RMS Power Dissipation at 25°C ......................... 175 mW Derate Linearly from 25°C ..................... 2.3 mW/°C Detector Collector-Emitter Breakdown Voltage ............. 30 V Emitter-Base Breakdown Voltage ..................... 5 V Power Dissipation at 25°C ......................... 200 mW Derate Linearly from 25°C ..................... 2.6 mW/°C Package Isolation Test Voltage (between emitter and detector referred to standard climate 23°C/50%RH, DIN 50014).....................................5300 VACRMS Creepage................................................min. 7 mm Clearance ...............................................min. 7 mm Isolation Resistance VIO=500 V, TA=25°C.......................... RIO≥1012 Ω VIO=500 V, TA=100°C........................ RIO≥1011 Ω Total Dissipation at 25°C............................ 400 mW Derate Linearly from 25°C ..................... 5.3 mW/°C Storage Temperature –55°C .................. to +150°C Operating Temperature –55°C ............... to +100°C Lead Soldering Time at 260°C ....................10 sec. .305 typ. (7.75) typ. .045 (1.14) .030 (.76) .150 (3.81) .130 (3.30) .135 (3.43) .115 (2.92) 4° Typ. 10° Typ. .040 (1.02) .030 (.76 ) 3°–9° .022 (.56) .018 (.46) .100 (2.54) Typ. .012 (.30) .008 (.20) Electrical Characteristics (TA=25°C) Parameter MIn. Typ. Max. Unit Condition 1.2 1.5 V IF=± 10 mA Emitter Forward Voltage VF Detector BVCEO 30 50 V IC=10 mA BVECO 7 10 V IE=10 µA 50 nA VCE=10 V 0.4 V IF=± 16 mA, IC=2 mA % IF=± 10mA, VCE=10 V ICEO 5 Package VCEsat DC Current Transfer Ratio 50 Symmetry CTR at +10 mA CTR at –10 mA 5–1 0.50 1.0 2.0 Figure 1. LED forward current versus forward voltage Figure 4. Current transfer ratio versus LED current and collector-emitter voltage Figure 6. Saturated and nonsaturated collector-emitter current versus LED current CTRce - Current Transfer Ratio - % 250 Ta = 25°C 200 Vce = 10V 150 100 V ce = 0.4V 50 0 .1 1 10 100 IF - LED C urrent - mA Figure 5. Saturated and nonsaturated collector-emitter current versus LED current Figure 3. Maximum LED power dissipation Figure 7. Collector emitter current versus collector emitter voltage Ice–Collector Emitter Current – mA Figure 2. Maximum LED current versus ambient temperature IF=8 mA 12 IF=7 mA 10 IF=6 mA 8 IF=5 mA 6 IF=4 mA IF=3 mA 4 IF=2 mA 2 IF=1 mA 0 0 0.2 0.4 0.6 1.0 1.4 1.8 2.2 Vce–Collector Emitter Voltage – V ILD255 5–2