Application Note AC275 CCGA to FBGA Adapter Sockets Table of Contents Introduction 1 The CCGA to FBGA Adapter Socket . 1 CCGA to FBGA Ceramic Adapter Configurations . 3 Assembly Procedure 4 PCB Pad Layout 7 Alignment Pins . 8 Reflow Profile . 9 CCGA to FBGA Adapter Pin Mapping List 9 Prototyped Product, Adapter, and PCB Design Matrix 9 Support . 11 Related Documents . 11 List of Changes . 11 Introduction Microsemi SoC Products Group recently introduced RTAX-S/L, the next generation designed-for-space antifuse field programmable gate arrays (FPGAs). RTAX-S/L, with up to four million system gates, is SoC Products Group s highest density family, providing the space designer with nearly 250 k ASIC gates and error correction and detection (EDAC) protected static RAM. RTAX-S/L is the first SoC Products Group family designed for use in the ceramic column grid array (CCGA) package configuration. SoC Products Group has developed a low cost prototyping methodology for RTAX-S/L using the Axcelerator family of FPGAs. RTAX-S/L is a derivative of the Axcelerator family. RTAX-S/L FPGAs can be prototyped using the comparable commercial Axcelerator device at a much lower cost than the equivalent space device. SoC Products Group has developed a CCGA to fine pitch ball grid array (FBGA) adapter socket to reduce RTAX-S/L development costs. SoC Products Group is also offering the CG624 package with the RTSX72SU, using the A54SX72A as the prototyping vehicle. This assembly procedure document covers the RTAX-S/L and RTSX-SU product families, which explains what a CCGA-FBGA adapter socket is, defines the component parts, and describes how to assemble the adapter. Once the adapter is assembled, the care and handling are similar to a CCGA packaged device. The intention of the prototyping adaptors is to provide functional validation and not at-speed timing validation. The prototyping adaptors may limit the performance of the FPGA I/O buffers. The CCGA to FBGA Adapter Socket The CCGA to FBGA adapter socket has a CCGA ceramic package configuration on the bottom and an FBGA configuration on top. The SoC Products Group CG (abbreviated for CCGA or ceramic column grid array) to FG (abbreviated for FBGA or fine pitch ball grid array) adapter socket offering allows for easy prototyping when using an FG package to prototype a CG package. The ordering part numbers are listed in Table 1 on page 2. November 2011 1 2011 Microsemi CorporationCCGA to FBGA Adapter Sockets Table 1 Ordering Part Numbers Adapter Socket Ordering Part Number Prototyped and Prototype Device CG624 to FG484 SK-SX72-CG624RTFG484 For prototyping RTSX72SU-CG624 or A54SX72A-CG624 using A54SX7A FG484 CG624 to FG896 SK-AX1-AX2-KITTOP and For prototyping RTAX1000S-CG624, RTAX1000SL-CG624, or SK-AX1-CG624-KITBTM AX1000-CG624 using AX1000-FG896 package CG624 to FG896 SK-AX1-AX2-KITTOP and For prototyping RTAX2000S-CG624, RTAX2000SL-CG624, or SK-AX2-CG624-KITBTM AX2000-CG624 using AX2000-FG896 package Figure 1 CCGA to FBGA Adapter Socket Components Notes: 1. Top, from left: ceramic adapter, socket lid, socket housing. 2. Bottom, from left: socket interposer, alignment pins, fixing screws. 2