521

Limits

Parameter

Symbol

Test Condition

Min.

Max.

Units

Laser Forward Current

If

DC

120

mA

Laser Reverse Voltage

Vlr

DC

2

V

Photodiode Reverse Voltage

Vr

DC

20

V

Photodiode Forward Current

Ipf

DC

1

mA

Operating Temperature

Tc

Temperature measured at case

–40

+85

°C

Storage Temperature

Ts

–40

+85

°C

Relative Humidity

RH

noncondensing

%RH

Fiber Pull Strength

Three times; 10 sec.

10

N

Mechanical Shock

MIL-STD-883D, Method 2002,

500

G

Condition A

Vibration

MIL-STD-883D, Method 2007,

20

G

Condition A

Absolute Maximum Ratings

Absolute limiting (maximum) ratings mean that no catastrophic damage will occur if the product is subjected to these ratings for short periods,

provided that each limiting parameter is in isolation and all other parameters have values within the performance specification. It should not be

assumed that limiting values of more than one parameter can be applied to the product at the same time.

Performance Specifications

LST252X

LST282X

LST292X

LST3521

LST3821

LST3921

Parameter

Symbol

Test Condition

Min. Max. Min. Max. Min. Max. Units

LASER

CW, Tc = –40

°C to

+85

°C, Po as noted

below unless otherwise

stated

Rated Optical Power

Po

Tc = ranges specified

0.2

1.0

1.6

mW

above, CW

Threshold Current

Ith

Tc = +25

°C

3.5

10

3.5

10

3.5

10

mA

Threshold Current

Ith

1.5

30

1.5

30

1

30

mA

Coupled Power in

Pth

If = Ith – 2 mA

10

10

10

µW

“Off” State

Slope Efficiency

η

Tc = +25

°C

10

16

508080

128

µW/mA

Drive Current above

Id

Tc = +25

°C

12.5

20

12.5

20

12.5

20

mW

Ith, for Im = Im

(Po, +25

°C)

Tc = –40

°C to +85°C

10

33.3

10

33.3

10

33.3

mA

Forward Voltage

Vf

1.6

1.6

1.6

V

Center Wavelength

λ

Tc = +25

°C

1286 1336 1286 1336 1286 1336

nm

Tc = –40

°C to +85°C

1260 1360 1260 1360 1260 1360

nm

Wavelength/

∆λ/∆T

0.4

0.4

0.4

nm/

°C

Temperature

Coefficient

Spectral Width

σ

One sigma, RMS

2.5

2.5

2.5

nm

Rise and Fall Time

τ

10-90%, Ith to Po

0.5

0.5

0.5

ns