HCPL-270L/070L/273L/073L
Low Input Current, High Gain, LVTTL/LVCMOS Compatible Optocouplers
Data Sheet
Description
These high gain series couplers use a Light Emitting Di-
ode and an integrated high gain photodetector to pro-
vide extremely high current transfer ratio between input
and output. Separate pins for the photodiode and out-
put stage result in LVTTL compatible saturation voltages
and high speed operation. Where desired, the V
CC
and V
O
terminals may be tied together to achieve conventional
photo-darlington operation. A base access terminal al-
lows a gain bandwidth adjustment to be made.
These optocouplers are for use in LVTTL/LVCMOS or
other low power applications. A 400% minimum current
transfer ratio is guaranteed over 0 to +70˚C operating
range for only 0.5 mA of LED current.
The HCPL-070L and HCPL-073L are surface mount de-
vices packaged in an industry standard SOIC-8 footprint.
The SOIC-8 does not require "through holes" in a PCB.
This package occupies approximately one-third the foot-
print area of the standard dual-in-line package. The lead
profile is designed to be compatible with standard sur-
face mount processes.
Features
•
3.3V/5V Dual Supply Voltages
•
Low power consumption
•
High current transfer ratio
•
Low input current requirements – 0.5 mA
•
LVTTL/LVCMOS compatible output
•
Performance guaranteed over temperature 0°C to +70°C
•
Base access allows gain bandwidth adjustment
•
High output current – 60 mA
•
Safety approval, UL, IEC/EN/DIN EN 60747-5-2, CSA
Applications
•
Ground isolate most logic families – LVTTL/LVCMOS
•
Low input current line receiver
•
High voltage insulation
•
EIA RS-232C line receiver
•
Telephone ring detector
•
V AC line voltage status indicator – low input power
dissipation
•
Low power systems – ground isolation
Functional Diagram
HCPL-270L/070L
NC 1
ANODE 2
CATHODE 3
NC 4
8
7
V
CC
V
B
ANODE
1
1
CATHODE
1
2
CATHODE
2
3
ANODE
2
4
SHIELD
HCPL-273L/073L
8
7
V
CC
V
O1
6 V
O
5 GND
6 V
O2
5 GND
TRUTH TABLE
LED
V
O
ON
OFF
LOW
HIGH
A 0.1 µF bypass capacitor connected between pins 8 and 5 is recommended.
CAUTION:
It is advised that normal static precautions be taken in handling and assembly
of this component to prevent damage and/or degradation which may be induced by ESD.