Avago Technologies ACPL-224-500E - Manual (Page 21)

AV02-4387EN 18 Avago Technologies
Description
A CMOS-to-CMOS interface is pos-
sible with Avago opto-couplers.
The above circuit shows an inter-
face circuit for 8 MBd applications.
Over the tempera ture range a CMOS
CD4050 Hex Buffer can source about
0.7 mA (minimum), which is suffi-
cient to drive the HCPL-2300/HCPL-
0300 opto coupler. The 20 pF capaci-
tor allows peaking currents to assist
the LED turn on and off quickly.
Performance of Circuit
• Optocoupler LED current: 0.5 mA
minimum
• Typical signaling rate: dc to
8 MBd
Benefits
• Low power consumption
• Simple interface
Alternative Avago Parts
1) HCPL-7721/7720/7710 High
Speed CMOS Optocoupler
2) HCPL-0721//0720/0710 Small
Outline High Speed CMOS Opto-
coupler
Low Power 8 MBd CMOS Interface
Digital Logic Interface/Level Shifting Applications
HCPL-2300/HCPL-0300
1 k Ω
0 5 0 4 D C 0 5 0 4 D C
0.1
µF
R
L
V
DD2
V O
2
3
5
6
8
7
V
IN
V
DD1 20 pF
R I
1 2
5 V
V DD1
(V)
5
10
15
R I
(k Ω)
5.11
13.3
19.6
V DD1
(V)
5
10
15
R L
(k Ω)
1
2.37
3.16