SINGLE CHANNEL IL74
DUAL CHANNEL ILD74
QUAD CHANNEL ILQ74
PHOTOTRANSISTOR OPTOCOUPLER
FEATURES
Dimensions in inches (mm)
• 7400 Series T2L Compatible
• Transfer Ratio, 35% Typical
• Coupling Capacitance, 0.5 pF
• Single, Dual, & Quad Channel
• Industry Standard DIP Package
• Underwriters Lab File #E52744
Pin One ID.
2
1
3
6
5
4
Anode
Base
1
2
3
.248 (6.30)
.256 (6.50)
Cathode
NC
Collector
Emitter
4
5
6
.335 (8.50)
.343 (8.70)
VE
D
•
VDE Approvals #0884
(Optional with Option 1, Add -X001 Suffix)
.300 (7.62)
typ.
.039
(1.00)
min.
DESCRIPTION
.130 (3.30)
The IL74 is an optically coupled pair with a Gal-
lium Arsenide infrared LED and a silicon NPN
phototransistor. Signal information, including a
DC level, can be transmitted by the device while
maintaining a high degree of electrical isolation
between input and output. The IL74 is especially
designed for driving medium-speed logic, where
it may be used to eliminate troublesome gound
loop and noise problems. Also it can be used to
replace relays and transformers in many digital
interface applications, as well as analog applica-
tions such as CRT modulation.
.150 (3.81)
4°
18° typ.
.110 (2.79)
.150 (3.81)
typ.
.020 (.051) min.
.010 (.25)
.014 (.35)
.031 (0.80)
.035 (0.90)
.018 (0.45)
.022 (0.55)
.300 (7.62)
.347 (8.82)
.100 (2.54) typ.
Pin One I.D.
1
4
5
3
6
2
7
Anode
1
2
3
4
8
7
6
5
Emitter
.268 (6.81)
.255 (6.48)
Cathode
Cathode
Anode
Collector
Collector
Emitter
8
The ILD74 has two isolated channels in a single
DIP package; the ILQ74 has four isolated chan-
nels per package.
.390 (9.91)
.379 (9.63)
.305 typ.
(7.75) typ.
.045 (1.14) .150 (3.81)
.030 (.76) .130 (3.30)
4°
Typ.
10 °
.135 (3.43)
.115 (2.92)
Typ.
3°–9°
.040 (1.02)
.030 (.76 )
.022 (.56)
.018 (.46)
.012 (.30)
.008 (.20)
.100 (2.54) Typ.
Anode
Cathode
Cathode
1
2
3
4
5
6
16 Emitter
15 Collector
14 Collector
13 Emitter
pin one
8
7
6
5
4
3
2
1
ID.
Anode
Anode
12 Emitter
.240 (6.10)
.260 (6.60)
Cathode
Cathode
Anode
11 Collector
9
10
12
16
11
13 14
15
Collector
Emitter
7
10
9
.780 (19.81)
.800 (20.32)
8
.040 (1.02)
.050 (1.27)
.300 (7.62)
typ.
.048 (1.22)
.052 (1.32)
.034 (.86)
.130 (3.30)
.150 (3.81)
.280 (7.11)
.330 (8.38)
.014
(.35)
typ.
.130 (3.30)
.150 (3.81)
.020 (.51)
.030 (.76)
3° to 9°
.008 (.20)
.012 (.31)
.033 (.84)
typ.
.0255 (.65)
typ.
.016 (.41)
.020 (.51)
.100 (2.54) typ.
5–1