5–1
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 cou-
pled isolator consisting of two Gallium Arsenide
infrared emitters and a silicon photodarlington sen-
sor.
Maximum Ratings (at 25
°C)
Emitter (Drive Circuit)
Continuous Forward Current .........................60 mA
Power Dissipation at 25
°C..........................100 mW
Derate Linearly from 55
°C....................1.33 mW/°C
Detector
Collector-Emitter Breakdown Voltage ..............60 V
Emitter-Collector Breakdown Voltage ..............12 V
Power Dissipation at 25
°C Ambient ...........200 mW
Derate Linearly from 25
°C......................2.6 mW/°C
Package
Isolation Test Voltage
(PK), t=1 sec.................................. 5300 VACRMS
Dissipation at 25
°C.....................................250 mW
Derate Linearly from 25
°C(2) .................3.3 mW/°C
Creepage ................................................ 7 min mm
Clearance................................................ 7 min mm
Isolation Resistance
TA=25°C.................................................. ≥10
12
TA=100°C................................................ ≥10
11
Storage Temperature(2) ..............–55
°C to +150°C
Operating Temperature ................–55
°C to +100°C
Lead Soldering Time at 260
°C .................... 10 sec.
Electrical Characteristics (TA=25°C)
Notes:
1. Indicates JEDEC registered data.
Symbol
Min.
Typ.
Max.
Unit
Condition
Emitter
Forward Voltage(1)
VF
1.25
1.5
V
IF=10 mA
Detector(2)
Breakdown Voltage,
Collector-Emitter
BVCEO
60
75
V
IC=1 mA,
IF=0
Leakage Current,
Collector-Emitter
ICEO
1.0
100
nA
VCE=10 V,
IF=0
Package
Current Transfer
Ratio(2)
IL755B-1
IL755B-2
CTR
750
1000
%
IF=±2 mA,
VCE=5 V
IF=±1 mA,
VCE=5 V
Saturation Voltage,
Collector-Emitter
VCEsat
1.0
V
IC=10 mA,
IF=±10 mA
Turn-On Time
ton
200
sV
CC=10 V
Turn-Off Time
toff
200
sI
F=± 2 mA,
RL=100
Dimensions in inches (mm)
1
2
3
6
5
4
Base
Collector
Emitter
Anode/
Cathode
Catho e/
Anode
NC
.010 (.25)
.014 (.35)
.114(2.90)
.130 (3.30)
.138 (3.50)
.032 (0.80)
Min.
.300 (7.62)
Typ.
.031 (0.80)
.035 (0.90)
.100 (2.54) Typ.
.039
(1.00)
Min.
.018 (0.45)
.022 (0.55)
.248 (6.30)
.256 (6.50)
.335 (8.50)
.343 (8.70)
6
5
4
1
2
3
18
° Typ.
.300 (7.62)
.347 (8.82)
4
°
Typ.
pin one
ID.
IL755B
BIDIRECTIONAL INPUT
DARLINGTON OPTOCOUPLER