3/19/03
Page 7 of 11
© 2003 Fairchild Semiconductor Corporation
PHOTO SCR OPTOCOUPLERS
H11C1 H11C2 H11C3 H11C4 H11C5 H11C6
TYPICAL APPLICATIONS
10A, T
2
L COMPATIBLE, SOLID
STATE RELAY
Use of the H11C4 for high sensitiv-
ity, 5300 V isolation capability,
provides this highly reliable solid
state relay design. This design is
compatible with 74, 74S and 74H
series T
2L logic systems inputs
and 120V AC (H11C1, H11C2,
H11C3) or 220V AC (H11C4,
H11C5, H11C6) loads up to 10A.
25W, LOGIC INDICATOR LAMP DRIVER
The high surge capability and non-reactive input characteris-
tics of the H11C allow it to directly couple, without buffers,
T2L and DTL logic to indicator alarm devices, without danger
of introducing noise and logic glitches.
200V/400V SYMMETRICAL TRANSISTOR COUPLER
Use of the high voltage PNP portion of the H11C provides a 400V transistor capable of
conducting positive and negative signals with current transfer ratios of over 1%. This function
is useful in remote instrumentation, high voltage power supplies and test equipment. Care
should be taken not to exceed the H11C 400mW power dissipation rating when used at high
voltages.
+5V
470 Ω
"COIL"
H11CX
56K
100 Ω
47 Ω
47 Ω
SC146D 0.1 µ
F
LOAD
"CONTACT"
120 VAC (H11C1, H11C2, H11C3)
220 VAC (H11C4, H11C5, H11C6)
IN5060 (4)
120 VAC (H11C1, H11C2, H11C3)
220 VAC (H11C4, H11C5, H11C6)
LOGIC
+5V
56K
470 Ω
H11CX
0.1 µ
F
100 Ω
INPUT
INDICATOR
LAMP
Fig. 8 Coupled dv/dt - Test Circuit
tp
+
H11C4
-
Vp
H
EXPONENTIAL OSCILLOSCOPE
10 KΩ
RAMP GEN.
100 Ω
+100 VAC
Vp = 800 Volts
tp = .010 Seconds
f = 25 Hertz
TA = 25
°
C
dv / dt
.63 Vp
Vp