D2547P Agere Systems, D2547P Datasheet - Page 4

• Manufacturer Part Number: D2547P
• Description: Wavelength-Selected High-Power D2587P-Type (with Wavelength Locker)/D2547P-Type Isolated DFB Laser Modules
• Manufacturer: Agere Systems

Wavelength-Selected, High-Power D2587P-Type (with Wavelength
Locker)/D2547P-Type Isolated DFB Laser Modules
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
* Does not apply to shipping container.
Handling Precautions
Power Sequencing
To avoid the possibility of damage to the laser module
from power supply switching transients, follow this
turn-on sequence:
1. All ground connections
2. Most negative supply
3. Most positive supply
4. All remaining connections
Reverse the order for the proper turn-off sequence.
Electrostatic Discharge
CAUTION: This device is susceptible to damage as
Agere Systems employs a human-body model (HBM)
for ESD-susceptibility testing and protection-design
evaluation. ESD voltage thresholds are dependent on
the critical parameters used to define the model. A
standard HBM (resistance = 1.5 k , capacitance = 100
pF) is widely used and, therefore, can be used for com-
parison purposes. The HBM ESD threshold presented
here was obtained using these circuit parameters:
4
Laser Reverse Voltage
dc Forward Current
Operating Case Temperature Range
Storage Case Temperature Range*
Photodiode Reverse Voltage
Photodiode Forward Current
Human-body Model
Parameter
a result of electrostatic discharge. Take
proper precautions during both han-
dling and testing. Follow guidelines
such as JEDEC Publication No. 108-A
(Dec. 1988).
Parameter
Value
>400
Unit
V
V
Symbol
I
V
I
FPDMAX
RPDMAX
FLMAX
RLMAX
T
T
stg
C
Mounting Instructions
The minimum fiber bend radius is 1.0 in. (25.4 mm)
To avoid degradation in performance, mount the mod-
ule on the board as follows:
1. Place the bottom flange of the module on a flat heat
2. Mount four #2-56 screws with Fillister heads
Note: Dimensions are in inches and (millimeters).
sink at least 0.5 in. x 1.180 in. (12.7 mm x 30 mm) in
size. The surface finish of the heat sink should be
better than 32 in. (0.8 m), and the surface flatness
must be better than 0.001 in. (25.4 m). Using ther-
mal conductive grease is optional; however, thermal
performance can be improved by up to 5% if conduc-
tive grease is applied between the bottom flange and
the heat sink.
(M2-3 mm) at the four screw hole locations (see Out-
line Diagram). The Fillister head diameter must not
exceed 0.140 in. (3.55 mm). Do not apply more than
1 in.-lb. of torque to the screws.
0.140
(3.56)
0.062 (1.58)
0.031 (0.79)
Min
–25
–40
Figure 4. Fillister Head Screw
—
—
—
—
Max
225
0.041 (1.04)
70
70
10
2
2
0.118
(3.00)
0.129 (3.28) R
Data Sheet, Rev. 2
Agere Systems Inc.
Unit
July 2001
mA
mA
°C
°C
V
V
0.086
(2.18)
1-532(C)