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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
DE
Dimensions in inches (mm)
4
3
2
1
Pin One I.D.
.268 (6.81) .255 (6.48)
5
6
7
8
Anode/ Cathode Cathode/ Anode Anode/ Cathode Cathode/ Anode
1 2 3 4
8 7 6 5
Emitter Collector Collector Emitter
.390 (9.91) .379 (9.63)
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 s, 300 pps)................. 3 A Continuous Forward Current...............130 mA RMS Power Dissipation at 25C ......................... 175 mW Derate Linearly from 25C ..................... 2.3 mW/C Detector Collector-Emitter Breakdown Voltage ............. 30 V Emitter-Base Breakdown Voltage ..................... 5 V Power Dissipation at 25C ......................... 200 mW Derate Linearly from 25C ..................... 2.6 mW/C Package Isolation Test Voltage (between emitter and detector referred to standard climate 23C/50%RH, DIN 50014).....................................5300 VACRMS Creepage................................................min. 7 mm Clearance ...............................................min. 7 mm Isolation Resistance VIO=500 V, TA=25C.......................... RIO1012 VIO=500 V, TA=100C........................ RIO1011 Total Dissipation at 25C............................ 400 mW Derate Linearly from 25C ..................... 5.3 mW/C Storage Temperature -55C .................. to +150C Operating Temperature -55C ............... to +100C Lead Soldering Time at 260C ....................10 sec.
4 Typ. .022 (.56) .018 (.46) .100 (2.54) Typ. .045 (1.14) .030 (.76) .150 (3.81) .130 (3.30) .135 (3.43) .115 (2.92) .040 (1.02) .030 (.76 ) 3-9 10 Typ. .305 typ. (7.75) typ.
.012 (.30) .008 (.20)
Electrical Characteristics (TA=25C)
Parameter Emitter Forward Voltage VF Detector BVCEO BVECO ICEO Package VCEsat DC Current Transfer Ratio Symmetry CTR at +10 mA 50 0.4 V % IF= 16 mA, IC=2 mA IF= 10mA, VCE=10 V 30 7 50 10 5 50 V V nA IC=10 mA IE=10 A VCE=10 V 1.2 1.5 V IF= 10 mA MIn. Typ. Max. Unit Condition
CTR at -10 mA
0.50
1.0
2.0
5-1
Figure 1. LED forward current versus forward voltage
Figure 4. Current transfer ratio versus LED current and collector-emitter voltage
250
CTRce - Current Transfer Ratio - %
Figure 6. Saturated and nonsaturated collector-emitter current versus LED current
Ta = 25C 200 Vce = 10V 150
100
V ce = 0.4V
50
0 .1
1
10
100
IF - LED C urrent - mA
Figure 2. Maximum LED current versus ambient temperature
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
12 10 8 6 4 2 0 0 0.2 0.4 0.6 1.0 1.4 1.8
IF=8 mA IF=7 mA IF=6 mA IF=5 mA IF=4 mA IF=3 mA IF=2 mA IF=1 mA 2.2
Vce-Collector Emitter Voltage - V
ILD255
5-2

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