1761987-9 - Tyco Electronics

Instruction Sheet

QSFP Connector, Thru

Bezel Cage Assemblies, 408-10187

LOC B

of 4

2008 Tyco Electronics Corporation, Harrisburg, PA

All International Rights Reserved

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*Trademark. Other products, logos, and company names used are the property of their respective owners.

TOOLING ASSISTANCE CENTER 1-800-722-1111

PRODUCT INFORMATION 1-800-522-6752 This controlled document is subject to change.

For latest revision and Regional Customer Service,

visit our website at

www.tycoelectronics.com

31 JAN 08 Rev A

Heat Sinks, and Light Pipes

Figure 1

Cage Assembly

1888674-1

Hard Stop

Transceiver Latch

(2 Places)

Light Pipe

Bracket

Cavity

Compliant Pins

(12 Places)

EMI Springs

Cage Assembly

1888617-1

EMI/Dust Cover

1888810-2

QSFP Connector

1761987-9

Card Entry

Slot Alignment Pins

1. INTRODUCTION

QSFP Connector 1761987–9 and Cage Assemblies

1888617–1 or 1888674–1 are used to interconnect

QSFP fiber optic or copper transceiver modules to

host printed circuit (pc) boards. The EMI/dust cover

1888810–2 is used to prevent contaminants from

entering the chassis and confine any EMI emissions

when the transceiver is not installed. See Figure 1.

In applications where heat dissipation is necessary, a

heat sink can be used. Choose a heat sink that meets

the needs of the specific application. A sample of

available heat sinks for the cage assembly is shown

in Figure 2. These heat sinks are designed to be

attached to the cage assembly using a clip.

All dimensions on this document are in metric

units. Figures and illustrations are for

identification only and are not drawn to scale.

Clip 2007304-2

Heat Sink

(Single Light Pipe)

Heat Sink

(Double Light Pipe)

LIGHT PIPE HEAT SINK PART NUMBER

TYPE PCI SAN NETWORKING

Single 1963702-2 1963703-2 1963704-2

Double 1963782-2 1963783-2 1963784-2

Figure 2

NOTE

408-10187

QSFP Connector, Thru Bezel Cage Assemblies, Heat Sinks, and Light Pipes

Rev

of 4 Tyco Electronics Corporation

Light pipes can be added to the cage assembly

1888674–1. Two light pipes for thru bezel QSFP

cages are shown in Figure 3. Both light pipes can be

used either with heat sinks or without, to transmit LED

light from the host pc board through the bezel.

Figure 3

Arms

Neck Latching Pin

Single Light Pipe

1888634-1

Double Light Pipe

2007309-1

2. DESCRIPTION

The connector contains right–angle surface mount

contacts and features a card entry slot that accepts

the 1.0 +0.1 mm thick integrated circuit card housed

in the transceiver.

The cage assembly is a frame with compliant pins for

mounting onto the host pc board. The transceiver

locking latches hold the transceiver in place, and the

hard stop controls the insertion depth of the

transceiver. The cage assembly is designed to fit

through openings in the bezel. Springs attached to

the perimeter of the cage opening maintain electrical

contact with the inside surfaces of the bezel opening

to prevent EMI emissions.

3. ASSEMBLY PROCEDURE

1. Install the connector onto the host pc board

according to Application Specification 114–13217.

Refer to Figure 4. Solder the connector to the pc

board before seating the cage assembly.

The soldering process will cause damage to the

cage assembly.

2. Design a pc board support fixture having a flat

surface with holes or a channel wide and deep

enough to receive any protruding components

during seating of the cage assembly on the host pc

board.

3. Place the host pc board on the pc board support

fixture.

Figure 4

Connector

Host PC Board

Seated Connector

A pc board support fixture must be used to

provide proper support for the host pc board, and

to prevent damage to the host pc board and its

adjacent components.

4. Align the compliant pins of the cage assembly

with the applicable holes in the host pc board.

Using even pressure across the cage assembly,

apply only that force necessary to seat the

shoulders of the compliant pins onto the host pc

board. Then remove the pc board support fixture.

5. Inspect the seated cage assembly according to

Figure 5.

Figure 5

Connector Cage Assembly

Host PC

Board

There is No

Damage or

Distortion

to the Cage

Assembly

0.05 mm (Max)

Shoulder of

Compliant Pin

Seated on Host

PC Board

6. If applicable, secure the heat sink to the cage

assembly as follows (see Figure 6):

a. Place the heat sink on the cage assembly

so that the raised boss of the heat sink is

CAUTION

408-10187

QSFP Connector, Thru Bezel Cage Assemblies, Heat Sinks, and Light Pipes

of 4Rev

Tyco Electronics Corporation

centered in the cavity of the cage assembly

and the perimeter of the heat sink is flush with

the top of the frame of the cage assembly.

b. Position the cross bars of the clip above the

slots in the top of the heat sink. Then seat the

clip onto the heat sink.

c. Using the tip of a tool (such as a small

screwdriver), push down upon the raised

sections on the rails of the clip until the

corresponding locking windows latch onto the

attachment latches of the cage assembly.

Make sure that all four locking windows have

engaged the attachment latches. A raised stop

is positioned beneath each latch to prevent

excessive strain on the clip.

Figure 6

Crossbars

Rails

Locking

Windows

Raised

Boss

Cavity Attachment Latches and Stops

7. If applicable, mount the light pipe so that the

pins on each arm fit inside the holes on the rear of

the cage. This will require applying slight pressure

on the arms to pinch the pins inward. The light pipe

should be aligned with the length–wise slots in the

heat sink, if a heat sink is installed. The single light

pipe, 1888634–1, has a neck that snaps down into

the light pipe bracket on cage assembly

1888668–1. The double light pipe, 2007309–1, has

a latching pin on the front crossbar that serves the

same purpose. The pc board end of the pipe

should sit above the indicator LED on the board as

shown in Figure 7.

8. Design the bezel according to 114–13217.

9. Mount the cage assembly (with the host pc

board) onto the bezel. Make sure that the opening

of the cage assembly is centered within the cutout

of the bezel and the light pipe, if one is used, fits

through the hole in the bezel. The bezel should

compress the EMI springs on all four sides of the

cage. See Figure 8.

10. Install the transceiver or module. If a

transceiver or module is not being installed, install

the EMI/dust cover into the opening of the cage

assembly.

Figure 7

Single Light Pipe

1888972-1 Double Light Pipe

1888971-1

To avoid interference with the insertion and

extraction of the transceiver, IT IS IMPORTANT

that the bezel and pc board be positioned in

relation to each other according to Figure 8.

Figure 8

0.15 +0.10

Bottom of Bezel

Cutout to Top of

PC Board

43.8 +X to C of Guide

Pins on the Connector

X = (Bezel Thickness) + 0.3 mm

4. REMOVAL

4.1. Light Pipe

The cage assembly and host pc board must be

detached from the bezel before removing the light

pipe from the cage assembly. To remove the light

pipe, proceed as follows:

1. Unlatch the front end of the light pipe from the

light pipe bracket near the front of the cage

assembly by gently pulling upward on the front of

the light pipe.

CAUTION

408-10187

QSFP Connector, Thru Bezel Cage Assemblies, Heat Sinks, and Light Pipes

Rev

of 4 Tyco Electronics Corporation

2. When the front of the light pipe has cleared the

light pipe bracket, squeeze the arms of the light

pipe toward each other until the arms can easily be

pulled clear of the mounting holes on the rear of

the cage assembly.

4.2. Heat Sink

The light pipe (optional) must be removed from the

bezel before removing the heat sink from the cage

assembly. To remove the heat sink, proceed as

follows:

1. Insert the tip of a tool (such as a small

screwdriver or hobby knife) behind either release

aperture of the clip, and rotate the tool until the

corresponding locking windows are released from

the attachment latches of the cage assembly.

Repeat this step for the remaining release

aperture. Refer to Figure 9.

2. Lift the clip and heat sink from the cage

assembly.

4.3. Cage Assembly

1. Partially insert the dust cover or a flat metal bar

(or similar object) into the front of the cage

assembly.

DO NOT allow the object to touch the connector,

otherwise, damage to the contacts could occur.

2. Lift the cage assembly off of the host pc board.

DO NOT re-use the cage assembly after

removal.

4.4. Connector

1. Remove the cage assembly according to

Paragraph 4.2. (The cage assembly must be

removed before removing the connector.)

2. Use standard de–soldering methods to remove

the connector from the host pc board.

DO NOT re-use the connector after removal.

5. REPLACEMENT AND REPAIR

The connector and cage assembly are not

repairable. DO NOT use any defective or

damaged products.

6. REVISION SUMMARY

Initial release of document

Figure 9

Release Aperture

of Clip

CAUTION