HCPL-2503-000E Datasheet, PDF (11/12 Pages) AVAGO TECHNOLOGIES LIMITED – Single Channel, High Speed Logic Interface Optocoupler

V_CM
0V
10 V
10%
t_r
90%
10%
t_r, t_f = 8 ns
90%
t_f
V_O
5V
SWITCH AT A: I_F = 0 mA
A
B
V_FF
V_O
SWITCH AT B: I_F = 16 mA
V_OL
Figure 7. Test circuit for transient immunity and typical waveforms
I_F
1
8
2
7
3
6
4
5
V_CM
+–
HP 8007
PULSE GEN.
HCPL-2503 fig 7
+5 V
R_L
V_O
V_CC1
V_CC2
1
8
I_F
A
R_IN
7404
74LS04
7405
74LS05
2
7
3
6
4
5
HCPL-2503
R_L
B
I_O
74LS04
74LS05
A) TYPICAL NON-INVERTING CIRCUIT
Figure 8. Recommended circuits
V_CC1
V_CC2
R_IN
1
8
A
2
7
I_F
3
6
7405
74LS05
4
5
HCPL-2503
R_L
B
I_O
74LS04
74LS05
B) TYPICAL INVERTING CIRCUIT
(SEE NOTE 10)
HCPL-2503 fig 8
Recommended Operation
The HCPL-2503 optocoupler is specified for use in LSTTL-
to-LSTTL and TTL-to-LSTTL interfaces. The recommended
circuits show the interface design and give suggested
component values. The input current I_F is given as both
a nominal value and a range. The range in I_F results
from the tolerances in V_CC and the input resistor R_IN.
The CTR of the optocoupler is given as the minimum
initial value over temperature, taken directly from the
Electrical Specifications. The value given for I_OL (min) is
based on the minimum CTR and the minimum I_F using
worst case values for R_L and V_CC. The resulting I_OL (min)
has ample design margin, allowing more than 20% for
CTR degradation even under these worst case condi-
tions. For additional information on CTR degradation
see Application Note 1002.