Avago Technologies ACPL-224-500E - Manual (Page 22)

AV02-4387EN 19 Avago Technologies
25 MBd CMOS Interface
Description
Up to 25 MBd CMOS-to-CMOS inter-
face is possible with the HCPL-7721
optocouplers. The above circuit re-
quires only a bypass capacitor on
each of the HCPL-7721 input-side
and output-side power supply pins.
Performance of Circuit
• Typical logic low input power
supply current for HCPL-7721: 1.5
mA
• Typical logic low input power
supply current for HCPL-7721: 7
mA
• Typical HCPL­7721 signalling rate:
dc to 25 MBd
• Typical HCPL­7721 pulse­width
distortion: 3 ns
• Typical HCPL­7721 propagation
delay: 20 ns
Benefits
• Lower power consumption
• Very simple interface
Alternative Avago Parts
1) HCPL-0721: SO8 package
2) HCPL-7720/0720: 25 MBd,
8 ns PWD CMOS interface opto-
coupler
3) HCPL-7710/0710: 25 MBd,
8 ns PWD CMOS interface opto-
coupler
Digital Logic Interface/Level Shifting Applications
8
7
6
1
3
SHIELD
5
2
4
V
DD1
GND 1
V
DD2
V OUT
I
O
LED1
NC
GND
2
V
IN
74HCTO4
74HCTO4
C2 C1
HCPL-7721
C1, C2 = 0.01 µF TO 0.1 µF