AC341: Microsemi CCGA to CLGA Adapter Socket Application Note

Application Note AC341
CCGA to CLGA Adapter Socket
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . .
CG to LG Adapter Socket . . . . . . . . . . . . . . .
CG to LG Adapter Socket Assembly Procedure . . .
CG1272 to LG1272 Adapter Socket Outline Drawing
Reflow Profile . . . . . . . . . . . . . . . . . . . . .
CCGA to LG1272 Adapter Pin Mapping List . . . . .
Prototyped Product, Adapter, and PCB Design Matrix
Support . . . . . . . . . . . . . . . . . . . . . . . .
List of Changes . . . . . . . . . . . . . . . . . . . .
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1
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Introduction
RTAX-S/SL is next generation, designed-for-space, metal-to-metal antifuse field programmable gate
array (FPGA) family by Microsemi. RTAX-S/SL is a derivative of the Axcelerator® family with up to two
million-system gates. RTAX-S/SL FPGAs provide the designer with nearly 500K ASIC gates and
embedded static RAM. Microsemi offers RTAX-S/SL devices in two package styles: the ceramic column
grid array (CCGA or CG) and ceramic quad flat pack (CQFP or CQ).
Microsemi has developed prototyping methods for RTAX-S/SL devices in CCGA and CQFP packages,
using the ceramic land grid array (LGA) package as a prototyping vehicle with the CQ to LG and CG to
LG adapter sockets. This document describes the procedure for assembling the CG to LG adapter
socket.
CG to LG Adapter Socket
The CG to LG adapter socket has an LG configuration on the top and a CG configuration on the bottom.
The adapter socket enables customers to use an LG package during prototyping, and then switch to an
equivalent CG package for production. There is one CG to LG adapter socket available. The top and
bottom ordering part numbers are listed in Table 1.
Table 1 • Adapter Socket Part Number
Adapter Socket
CG1272 to LG1272
Ordering Part Number
SK-RT4K-KITTOP
SK-RT4K-CG1272-KITBTM
October 2012
© 2012 Microsemi Corporation
Prototyped and Prototype Device
For prototyping RTAX4000S/SL-CG1272 using
RTAX4000S/SL-LG1272 package
1
CCGA to CLGA Adapter Socket
Figure 1 shows the complete CG1272 to LG1272 assembly kit. SK-RT4K-KITTOP contains an interposer
(3), a socket lid (4), and eight screws (5). SK-RT4K-CG1272-KITBTM contains a ceramic adapter (1),
which is an unique adapter for RTAX4000S/SL, socket housing (2), and eight screws (5).
Figure 1 • Parts of CG1272 to LG1272 Adapter Socket
(1) Ceramic Adapter, (2) Socket Housing, (3) Socket Interposer, (4) Socket Lid, (5)
Fixing Screws
Figure 2 shows the top view, bottom view, and orientation view of the RTAX4000S/SL CG1272 to
LG1272 adapter.
Figure 2 • RTAX4000S/SL CG1272 to LG1272 Ceramic Adapter
Top View, Bottom View and Orientation Drawing
2
CG to LG Adapter Socket Assembly Procedure
CG to LG Adapter Socket Assembly Procedure
Step 1
Solder column attachment to ceramic adapter.
Note: Do not reflow the adapter to the circuit board until the housing has been attached, as detailed in
Step 2 below.
Figure 3 • CG1272 to LG1272 Adapter Solder Column Attachment
Step 2
Assemble socket housing to adapter. A torque limit screw driver is not required (Figure 4).
Figure 4 • Assemble Socket Housing to CG1272 to LG1272 Adapter
Note: The housing, eight screws, and ceramic adapter form the –KITBTM assembly.
3
CCGA to CLGA Adapter Socket
Step 3
Reflow the adapter to the printed circuit board (PCB) as shown in (Figure 5).
Note: Since reflow profiles depend upon the size of the board and its components, perform reflow process
optimization for better results.
Figure 5 • Reflow Adapter (with socket housing mounted) to PCB
Step 4
Place the socket interposer into the adapter (Figure 6).
Figure 6 • Place the Socket Interposer into Adapter Assembly
4
CG to LG Adapter Socket Assembly Procedure
Step 5
Place the LG1272 package into the adapter (Figure 7).
Figure 7 • Place LG1272 Package into Adapter Assembly
Step 6
Place and tighten the socket lid to the socket housing with the remaining eight screws (Figure 8). A
torque limit screw diver is not required.
Figure 8 • Place and Tighten Socket Lid Using Eight Screws and Optional Alignment Pins
5
CCGA to CLGA Adapter Socket
CG1272 to LG1272 Adapter Socket Outline Drawing
Figure 9 • CG1272 to LG1272 Adapter Socket Outline Drawing (unit: mm)
6
Reflow Profile
Reflow Profile
Since reflow profile depends upon the size of the board and other components, end users should
perform additional fine tuning from the general profile, as shown in Figure 10.
250
Maximum Package Body
Temperature = 220˚C (±5˚C)
200
180˚C
150
Temperature (˚C)
220˚C: 30 seconds maximum
125
˚C t
1˚C to 3˚C
per second
0˚C
o 18
1˚C to 4˚C
per second
Keep temperature above
183˚C (solder melting point)
for at least 60 seconds
100
120 seconds
minimum
50
0
50
1˚C to 3˚C
per second
100
150
200
250
300
Time (seconds)
Figure 10 • Sample Temperature Profile for I/R or Convection Reflow
Note: This temperature profile guideline is for reference only.
7
CCGA to CLGA Adapter Socket
CCGA to LG1272 Adapter Pin Mapping List
The CG1272 to LG1272 adapter is same number pad connection routing. For example, LG1272 A1
connects to CG1272 A1, LG1272 A2 connects to CG1272 A2, and so on.
Table 2 • CCGA to LG1272 Adapter Pin Mapping List
Adapter
Socket
Ordering Part Number
CG1272 to SK-RT4K-KITTOP and
LG1272
SK-RT4K-CG1272KITBTM
Prototyped and Prototype Device
For prototyping RTAX4000S/SL-CG1272
using RTAX4000S/SL-LG1272 package
Adapter Pin Mapping List
Document Number
N/A
Prototyped Product, Adapter, and PCB Design Matrix
Designing the PCB for a specific product requires an understanding of which adapter socket will work.
Each adapter socket is routed differently based on the corresponding Axcelerator device (or its
radiation-tolerant equivalent derivative that is being prototyped) and the commercial Axcelerator FG
package used for prototyping. Table 3 shows the combinations that will work.
Table 3 • Prototyped Product, Adapter, and PCB Design Matrix
Prototyped Product
RTAX4000S/SL-CG1272
Adapter Part Number
SK-RT4K-KITTOP and
SK-RT4K-CG1272-KITBTM
Prototype Vehicle
PCB Design
RTAX4000S/SLLG1272
RTAX4000S/SL-CG1272
Support
Visit Technical Support online at www.microsemi.com/soc/kb/search.aspx.
Technical Support
For Technical Support, email at [email protected]
From North America, call 800.262.1060.
From the rest of the world, call 650.318.4460.
ITAR Technical Support
For technical support on RH and RT FPGAs that are regulated by International Traffic in Arms
Regulations (ITAR), contact via web (Select Yes in the ITAR drop-down list), phone, or email at
www.microsemi.com/soc/mycases.
For ITAR Technical Support, email at [email protected]
From North America, call 888.988.ITAR.
From the rest of the world, call 650.318.4900.
8
List of Changes
List of Changes
The following table lists critical changes that were made in the current version of the document.
Revision
Changes
Page
Revision 2
(October 2012)
Updated Figure Title for Figure 1 (SAR 41789).
2
Updated "Support" section.
8
Revision 1
(August 2010)
In the "Introduction" section, the phrase "with error detection and correction (EDAC)
protected" [static RAM] was deleted and replaced with "embedded."
1
The following figures were replaced:
Figure 1 • Parts of CG1272 to LG1272 Adapter Socket
2
Figure 2 • RTAX4000S/SL CG1272 to LG1272 Ceramic Adapter
2
Figure 5 • Reflow Adapter (with socket housing mounted) to PCB
4
Figure 9 • CG1272 to LG1272 Adapter Socket Outline Drawing (unit: mm)
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Microsemi Corporation (NASDAQ: MSCC) offers a comprehensive portfolio of semiconductor
solutions for: aerospace, defense and security; enterprise and communications; and industrial
and alternative energy markets. Products include high-performance, high-reliability analog and
RF devices, mixed signal and RF integrated circuits, customizable SoCs, FPGAs, and
complete subsystems. Microsemi is headquartered in Aliso Viejo, Calif. Learn more at
www.microsemi.com.
Microsemi Corporate Headquarters
One Enterprise, Aliso Viejo CA 92656 USA
Within the USA: +1 (949) 380-6100
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© 2012 Microsemi Corporation. All rights reserved. Microsemi and the Microsemi logo are trademarks of
Microsemi Corporation. All other trademarks and service marks are the property of their respective owners.
51900209-2/10.12
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