Avago Technologies ACPL-224-500E - Manual (Page 24)

AV02-4387EN 21 Avago Technologies
Description
The HCPL-4701 low-power optocou-
pler is used for 3 V-to-3 V Logic inter-
face across an isolation barrier. Only
40 µA of LED current (I
F
) is required
to turn-on the optocoupler. Typical
power for dissipation for just the
optocoupler is 135 µW at I
F
= 40 µA,
and 965 µA at I
F
= 500 µA.
Performance of Optocoupler
• Typical optocoupler current trans-
fer ratio: 3500% at
I
F
= 40 µA
• Input current for optocoupler
turn-on: 40 µA
Benefits
• Low power dissipation
Isolated 3 V Logic Interface/Battery Operated Applications
Alternative Avago Parts
1) HCPL-4731 Dual Low Power Op-
tocoupler
2) HCPL-070A SO-8 Low Power Op-
tocoupler
3) HCPL-073A SO-8 Dual Channel
Low Power Optocoupler
4) HCPL-050L/060L/070L, HC-
PL-250L/260L/270L 3.3V Opto-
couplers
Digital Logic Interface/Level Shifting Applications
V
OUT
V
IN
HCPL-4701
2
R
L
100 Ω
V
CC2
= 3 V
2 2
0.1 µF
R
1 74LVU04
*
* USE ANY
SIGNAL DIODE
1
1
V
CC1
= 3 V
TYPICAL POWER DISSIPATION FOR 3 V APPLICATION
(V
CC1
, V
CC2
= 3.0 V, R
L
= 11 k Ω, R
1
= 43.8 k Ω)
V
CC1
SIDE:
OPTOCOUPLER LED
INPUT RESISTOR R
1
TOTAL V
CC1
SIDE
50 µW
70 µW
120 µW
V
CC2
SIDE:
OPTOCOUPLER (V
O
, V
CC2
)
PULL-UP RESISTOR R
L
TOTAL V
CC2
SIDE
85 µW
790 µW
875 µW
RECOMMENDED V
CC
FILTER
10.0 µF