Preliminary Data Sheet

980-Type Ultrahigh

April 1999

Reliability Pump Laser Module

3

Lucent Technologies Inc.

Table 1. Pinout Descriptions

Handling Precautions

Note: Dimensions are inches and (millimeters).

1-532(F)

Figure 2. Fillister Head Screw

Power Sequencing

Adopt the following sequence for turn-on as a matter of

good practice to avoid the possibility of damage to the

pump laser module from power supply switching tran-

sients:

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.

Mounting Instructions

The minimum fiber-bend radius is 25 mm.

To avoid degradation in performance, mount the mod-

ule on the board as follows (see Figure 2):

1. Place the bottom flange of the module on a flat heat

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 µin. (0.8 µm), and the surface flatness

must be better than 0.001 in. (25.4 µm).

Mount four #2-56 screws with Fillister heads (M2-

3 mm) at the four screw hole locations (see Outline

Diagram). The Fillister head diameter must not exceed

0.140 in. (3.55 mm). Do not apply more than 2 in./lb. of

torque to the screws. To minimize package distortion, it

is recommended that a washer is used above and

beneath each mounting foot.

Electrostatic Discharge

Caution: This is a Class 0 ESD device which is

susceptible to damage as a result of

electrostatic discharge (ESD). Take

proper precautions during both handling

and testing. Follow JEDEC Publication

No. 108-A (Dec. 1998).

Lucent employs a human-body model (HBM) and the

field-induced charged-device model (CDM) 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

Ω, capacitance = 100 pF) is widely

used and, therefore, can be used for comparison pur-

poses. The HBM ESD threshhold presented here was

obtained using these circuit parameters:

Pin

Connection

1

Chassis Ground

2

Chassis Ground

3

Photodetector Anode

4

Photodetector Cathode

5

Chassis Ground

6

Chassis Ground

7

Chassis Ground

8

Chassis Ground

9

Chassis Ground

10

Pump Laser Anode

11

Pump Laser Cathode

12

Chassis Ground

13

Chassis Ground

14

Chassis Ground

0.118

(3.00)

0.062 (1.58)

0.140

(3.56)

0.031 (0.79)

0.129 (3.28)

0.086

(2.18)

0.041 (1.04)

Parameter

Value

Unit

Charged-device Model

≥200

V

Human-body Model

≥400

V