Description

These high gain series couplers use

a Light Emitting Diode and an

integrated high gain photodetector

to provide extremely high current

transfer ratio between input and

output. Separate pins for the

photodiode and output stage result

in LVTTL compatible saturation

voltages and high speed operation.

terminals may be tied together to

achieve conventional photo-

Agilent HCPL-270L/ 070L/273L/073L

Low Input Current High Gain

LVTTL/LVCMOS Compatible

3.3 V Optocouplers

Data Sheet

Features

• 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, VDE, CSA

(pending)

Applications

• Ground isolate most logic

families – LVTTL/LVCMOS

• Low input current line receiver

• High voltage insulation

• EIA RS-232C line receiver

• Telephone ring detector

• 117 V AC line voltage status

indicator – low input power

dissipation

• Low power systems – ground

isolation

Functional Diagram

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.

darlington operation. A base

access terminal allows 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.

7

1

2

3

4

5

6

8

NC

ANODE

CATHODE

NC

VCC

VO

GND

TRUTH TABLE

LED

ON

OFF

VO

LOW

HIGH

VB

VO2

VO1

VCC

GND

ANODE 1

CATHODE 1

CATHODE 2

ANODE 2

7

5

6

8

2

3

4

1

SHIELD

HCPL-270L/070L

HCPL-273L/073L