1

L3989 series

High power infrared LED

Infrared LED

www.hamamatsu.com

Absolute maximum ratings (Ta=25 °C)

Parameter

Symbol

Condition

Value

Unit

Forward current

80

mA

Reverse voltage

3V

Pulse forward current

Pulse width=10 μs

Duty ratio=1%

0.8

A

Operating temperature

Topr

-30 to +85

°C

Storage temperature

Tstg

-40 to +100*

°C

* The L3989 is guaranteed to resist temperature cycle test of up to 5 cycles.

Note: Exceeding the absolute maximum ratings even momentarily may cause a drop in product quality. Always be sure to use the

product within the absolute maximum ratings.

Applications

Optical fiber communication

Optical switches

High reliability

High radiant output power

High-speed response

Features

Electrical and optical characteristics (Ta=25 °C)

Parameter

Symbol

Condition

L3989

L3989-01

L3989-02

Unit

Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.

Peak emission wavelength

800

830

860

800

830

860

800

830

860

nm

Spectral half width

∆λ

-40-

-40-

-40-

nm

Forward voltage

-

1.45 1.60

-

1.45 1.60

-

1.45 1.60

V

Pulse forward voltage

-

2.3

2.9

-

2.3

2.9

-

2.3

2.9

V

Reverse current

-

-10-

-10-

-10

μA

Radiant flux

ɸe

6.0

8.0

-

2.5

3.6

-

4.0

5.8

-

mW

Radiant illuminance

-

0.9

-

-

2.2

-

-

0.9

-

Cutoff frequency

fc

15

30

-

15

30

-

15

30

-

MHz