PGA121

MOSIS Ceramic Packaging Connections and Information

MOSIS offers as a standard part an 121 pin grid array package. This package is available in two cavity sizes. The first is Kyocera KD-P85083-A or equivalent with a 0.325" cavity (topside). The second is Kyocera KD-P87645-C or equivalent with a 0.670" cavity (also topside). Both are 1.320" square packages and have the same bonding finger to pin mapping. The pins of these packages are arranged on an 13 x 13 pin grid at 0.1" centers. There are three full rows of pins around the outside. The following diagram depicts the bonding pad to pin connectivity as viewed from the top of the package (or the top of the socket into which the package is plugged), with the index at the upper right corner. (This view corresponds to the MOSIS layout that has pin #1 in the upper right hand corner and proceeds counterclockwise around the die.) The columns of the grid are labelled alphabetically and the rows numerically.


			             N   M   L   K   J   H   G   F   E   D   C   B   A
			          +----------------------------------------------------+
			          |                                                    |
			        1 | 30  27  26  23  21  18  17  14  11   9   6   3 120 | 1
			          |                                                    |
			        2 | 33  32  29  25  22  19  15  13  10   7   5   2 117 | 2
			          |                                                    |
			        3 | 36  35  31  28  24  20  16  12   8   4   1 119 116 | 3
			          |                                                    |
			        4 | 39  37  34                             118 115 113 | 4
			          |                                                    |
			        5 | 41  40  38                             114 112 111 | 5
			          |                                                    |
			        6 | 44  43  42                             110 109 108 | 6
			          |                                                    |
			        7 | 47  45  46                             106 105 107 | 7
			          |                                                    |
			        8 | 48  49  50                             102 103 104 | 8
			          |                                                    |
			        9 | 51  52  54                              98 100 101 | 9
			          |                                                    |
			       10 | 53  55  58                              94  97  99 | 10
			          |                                                    |
			       11 | 56  59  61  64  68  72  76  80  84  88  91  95  96 | 11
			          |                                                    |
			       12 | 57  62  65  67  70  73  75  79  82  85  89  92  93 | 12
			          |                                                    |
			       13 | 60  63  66  69  71  74  77  78  81  83  86  87  90 | 13
			          +----------------------------------------------------+
			             N   M   L   K   J   H   G   F   E   D   C   B   A

			                       Pad to Pin Layout -- TOP View
			


CAUTION: the pad-to-pin layout varies for different 121 pin products, even those from a single vendor. For our purposes, equivalent parts have the same pin grid, the same pad to pin layout, and the same pad to cavity (substrate) connection. Be sure to use this diagram for MOSIS-supplied parts unless or until instructed otherwise.

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