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IL755B
BIDIRECTIONAL INPUT DARLINGTON OPTOCOUPLER
FEATURES * Very High Current Transfer Ratio (500% min.) IL755B-1: 750% at IF=2 mA, VCE=5 V IL755B-2: 1000% at IF=1 mA, VCE=5 V * BVCEO >60 V * Isolation Test Voltage, 5300 VACRMS * AC or Polarity Insensitive Inputs * No Base Connection * High Isolation Resistance, 1012 * Low Coupling Capacitance * Standard Plastic DIP Package * Underwriters Lab Approval #E52744 * VDE #0884 Available with Option 1 DESCRIPTION The IL755B is a bidirectional input, optically coupled isolator consisting of two Gallium Arsenide infrared emitters and a silicon photodarlington sensor. Maximum Ratings (at 25C) Emitter (Drive Circuit) Continuous Forward Current .........................60 mA Power Dissipation at 25C..........................100 mW Derate Linearly from 55C....................1.33 mW/C Detector Collector-Emitter Breakdown Voltage ..............60 V Emitter-Collector Breakdown Voltage ..............12 V Power Dissipation at 25C Ambient ...........200 mW Derate Linearly from 25C......................2.6 mW/C Package Isolation Test Voltage (PK), t=1 sec.................................. 5300 VACRMS Dissipation at 25C.....................................250 mW Derate Linearly from 25C(2) .................3.3 mW/C Creepage ................................................ 7 min mm Clearance................................................ 7 min mm Isolation Resistance TA=25C.................................................. 1012 TA=100C................................................ 1011 Storage Temperature(2) ..............-55C to +150C Operating Temperature ................-55C to +100C Lead Soldering Time at 260C .................... 10 sec.
Dimensions in inches (mm)
3 2 1 pin one Anode/ 1 Cathode ID. Catho e/ 2 Anode NC 3 4 5 .335 (8.50) .343 (8.70) .039 (1.00) Min. .130 (3.30) .138 (3.50) 4 Typ. 18 Typ. .032 (0.80) Min. .031 (0.80) .035 (0.90) .100 (2.54) Typ. .010 (.25) .014 (.35) .300 (7.62) .347 (8.82) .114(2.90) .130 (3.30) .300 (7.62) Typ. 6 6 Base 5 Collector 4 Emitter
.248 (6.30) .256 (6.50)
.018 (0.45) .022 (0.55)
Electrical Characteristics (TA=25C)
Symbol Emitter Forward Voltage(1) Detector(2) Breakdown Voltage, Collector-Emitter Leakage Current, Collector-Emitter Package Current Transfer Ratio(2) IL755B-1 IL755B-2 Saturation Voltage, Collector-Emitter Turn-On Time Turn-Off Time Notes: 1. Indicates JEDEC registered data. VCEsat ton toff CTR 750 1000 1.0 200 200 % % V s s IF= 2 mA, VCE=5 V IF= 1 mA, VCE=5 V IC=10 mA, IF= 10 mA VCC=10 V IF= 2 mA, RL=100 BVCEO ICEO 60 75 1.0 100 V nA IC=1 mA, IF=0 VCE=10 V, IF=0 VF 1.25 1.5 V IF=10 mA Min. Typ. Max. Unit Condition
5-1
Figure 1. LED forward current versus forward voltage
IF - LED Forward Current - mA
60 85C 25C 0 -55C -20 -40 -60 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5
Figure 5. Normalized non-saturated and saturated collector-emitter current versus LED current
10 Normalized to: Ta = 25C IF = 10 mA Vce = 5 V Vce = 5 V
NIce - Normalized Ice
40 20
1 .1 .01 .001 .1
Vce = 1V
VF - LED Forward Voltage - V
1 10 IF - LED Current - mA
100
Figure 2. Normalized non-saturated and saturated CTRce versus LED current
4.0
NCTRce - Normalized CTRce
Figure 6. Low to high propagation delay versus collector load resistance and LED current
tpLH - Low/High Propagation Delay - s
80 60 220 40 470 20 100 0 0 5 10 15 IF - LED Current - mA 20 Ta = 25C, Vcc = 5V Vth = 1.5 V 1K
3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 .1
Normalized to: Ta = 25C Vce = 5 V IF = 1 mA Vce = 5 V
Vce = 1 V 1 10 IF - LED Current - mA 100
Figure 3. Normalized non-saturated and saturated CTRce versus LED current
3.0 NCTRce - Normalized CTRce 2.5 2.0 1.5 Vce = 5 V 1.0 0.5 Vce = 1 V 0.0 .1 1 10 IF - LED Current - mA 100 Normalized to: Ta = 25C Vce = 5 V IF = 2 mA
Figure 7. High to low propagation delay versus collector load resistance and LED current
tpHL - High/Low Propagation delay - s
20 1K 15 10 5 0 0 5 10 15 IF - LED Current - mA 20 100 Ta = 25C Vcc = 5 V Vth = 1.5 V
Figure 4. Normalized non-saturated and saturated Figure 8. Switching waveform Ice versus LED current
100
NIce - Normalized Ice
Figure 9. Normalized non-saturated and saturated CTRce versus LED current
VCC=10 V
F=10 KHz, DF=50%
10 1 .1 .01 .1
Normalized to: Ta = 25C Vce = 5 V IF = 2 mA
Vce = 5 V
IF
Vce = 1 V
RL VO
VO
tR
tD tPLH VTH=1.5 V tF
IF=2 mA
1 10 IF - LED Current - mA
100
tPHL
tS
IL755B
5-2

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