EW IL256A N AC INPUT PHOTOTRANSISTOR SMALL OUTLINE SURFACE MOUNT OPTOCOUPLER FEATURES * Guranteed CTR Symmetry, 2:1 Maximum * Bidirectional AC Input Industry Standard SOIC-8 Surface * Mountable Package * Standard Lead Spacing, .05" * Available in Tape and Reel Option (Conforms to EIA Standard RS481A) Dimensions in inches (mm) .120.005 (3.05.13) .240 (6.10) .192.005 (4.88.13) The product is well suited for telecom applications such as ring detection or off/on hook status, given its bidirectional LED input and guaranteed current transfer ratio (CTR) minimum of 20% at IF= 10 mA. Detector Collector-Emitter Breakdown Voltage .............. 30 V Emitter-Collector Breakdown Voltage ................ 5 V Collector-Base Breakdown Voltage ................. 70 V Power Dissipation ..................................... 150 mW Derate Linearly from 25C ..................... 2.0 mW/C Package Total Package Dissipation at 25C Ambient (LED + Detector).................................... 240 mW Derate Linearly from 25C ..................... 3.1 mW/C Storage Temperature .................. -55C to +150C Operating Temperature ............... -55C to +100C Soldering Time at 260C..............................10 sec. 8 2 7 3 6 4 5 .020.004 (.15.10) 2 plcs. NC Base Collector Emitter 7 .058.005 (1.49.13) 40 .008 (.20) .050 (1.27) typ. .021 (.53) .125.005 (3.18.13) 5 max. R.010 (.25) max. Lead Coplanarity .0015 (.04) max. Characteristics (TA=25C) Symbol Maximum Ratings Emitter Continuous Forward Current......................... 60 mA Power Dissipation at 25C ........................... 90 mW Derate Linearly from 25C ..................... 0.8 mW/C 1 .015.002 (.38.05) .004 (.10) .008 (.20) These circuit elements are constructed with a standard SOIC-8 foot print. Anode/ Cathode Cathode/ Anode NC NC .016 (.41) Pin One ID DESCRIPTION The IL256A is an AC input phototransistor optocoupler. The device consists of two infrared emitters connected in anti-parallel and coupled to a silicon NPN phototransistor detector. CL .154.005 (3.91.13) Min. Typ. Max. Unit Condition 1.2 1.5 V IF= 10 mA V V V IC=1 mA IE=100 A IC=100 A nA VCE=10 V % IF= 10 mA, VCE=5 V Emitter Forward Voltage VF Detector Breakdown Voltage Collector-Emitter Emitter-Collector Collector Base Leakage Current, Collector-Emitter BVCEO BVECO BVCBO 30 5 70 ICEO 50 10 90 5 50 Package DC Current Transfer Ratio CTR Symmetry CTR at +10mA 20 0.5 1.0 2.0 CTR at -10 mA Saturation Voltage, Collector-Emitter VCEsat Isolation Voltage, Input to Output VIO 5-1 IF= 16 mA, IC=2 mA 0.4 2500 VACRMS Figure 5. Normalized saturated CTR Figure 1. LED forward current versus forward voltage Ta = 25C Ta = 50C Ta = 70C Ta = 100C 60 0.8 40 Normalized CTR IF - LED Forward Current - mA 1.0 85C 20 25C 0 -55C -20 Vce(sat) = 0.4V 0.6 0.4 Normalized to: -40 0.2 -60 -1.5 0.0 If = 10 mA. Vce =10V Ta = 25C -1.0 -0.5 0.0 0.5 1.0 VF - LED Forward Voltage - V 1.5 .1 1 10 If - LED Current - mA 100 Figure 6. Normalized CTRcb Figure 2. Forward voltage versus forward current 1.5 Normalized to: If=10mA, Ta=25C 1.3 Normalized CTRcb Vf-Forward Voltage - V 1.4 Ta = -55C 1.2 1.1 Ta = 25C 1.0 0.9 1.0 0.5 25C 50C 70C Ta = 100C 0.8 0.0 0.7 .1 1 10 .1 100 If - Forward Current - mA 1 10 100 If - LED Current -mA Figure 7. Photocurrent versus LED current Figure 3. Peak LED current versus duty factor, Tau 1000 10000 Duty Factor t DF = /t .05 .1 .2 100 10 10-6 .5 100 10 25C 70C 1 .1 10-5 10-4 10-3 10-2 10-1 10 0 .1 10 1 1 Figure 4. Normalized CTR versus If and Ta Figure 8. Base current versus If and HFE 2.0 700 100 Normalized to : Ta = 25C Ta = 50C Ta = 70C Ta = 100C Vce=0.4V, Ta=25C If = 10 mA, Vce =10V 600 Ta = 25C HFE - Transistor Gain 1.5 100 If - LED Current - mA t - LED Pulse Duration - s Normalized CTR 10 1.0 0.5 500 10 400 300 1 If- LED Current-mA 1000 .005 .01 .02 Icb - Photocurrent - A If(pk) - Peak LED Current - mA 200 0.0 .1 1 10 100 100 1 If - LED Current - mA 10 100 .1 1000 Ib - Base Current - A IL256A 5-2 Figure 11. Base emitter voltage versus base current Figure 9. Normalized HFE versus Ib, Ta 1000 1.2 Normalized to: 100 1.0 Ta = 25C Vce = 10V 0.8 NHFE -20C NHFE 25C NHFE 50C NHFE 70C 0.6 10 100 Ib - Base Current - A 1000 .1 .01 0.5 0.6 0.7 0.8 Figure 12. Collector-emitter leakage current versus temperature 1.5 10 5 Iceo - Collector-Emitter - nA Normalized to: Normalized Saturated HFE 1 Vbe - Base Emitter Voltage - V Figure 10. Normalized saturated HFE versus Ib HFE at Vce = 10V, Icb = 10A 10 4 Ta = 25C 1.0 10 3 Ta = -20C Ta =25C Ta = 50C Ta = 70C 0.5 10 .001 0.4 0.4 1 Ta = 25C Ib - Base Current - A Normalized HFE Ib = 10A 10 2 Vce = 10V 10 1 Vce(sat) = 0.4V TYPICAL 10 0 10 -1 0.0 1 10 100 10 -2 -20 1000 Ib - Base Current - A 0 20 40 60 80 Ta - Ambient Temperature - C 100 IL256A 5-3