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--- azonenberg:microchip:23k256 [2014/04/08 07:26]
azonenberg
+++ azonenberg:microchip:23k256 [2015/01/04 22:50]
@@ Line 1: / Line 1: @@
-{{tag>collection_az vendor_microchip year_2006 type_memory type_memory/sram foundry_umc tech_180nm}}
-SPI serial SRAM chip. Looks like 4 metal layers and a fairly fine process geometry.
-Definitely //not// one of Microchip's standard fan processes. CMP filler pattern is consistent with UMC 180 nm (pitch and dimensions of CMP filler and traces on both M4 and M3 match [[azonenberg:xilinx:xc2c32a]] within 3%) however this is the only evidence we have to support this conclusion at this time; tag is tentative.
-The die ID also does not match the normal Microchip layout and there is no Microchip logo on the die. Maybe this mask set was acquired from a buyout or something?
-There are three unbonded pads on the die. Purpose of these is unknown at this time since all known packages are 8 pins.
-====== Package ======
--pin SOIC.
-{{:azonenberg:microchip:dscf4970_cropped.jpg?300|}}
-Markings:
-K256I
-    SN (e3) 1002
-    (Microchip logo) ADJ
-====== Die ======
-Size is approximately 2110 x 1120 μm (2.36 mm<sup>2</sup>)
-{{:azonenberg:microchip:23k256_bf_neo10x_3k.jpg?600|}}
-Die copyright area. Markings:
-    M4-B
-    (C) (M) 2006
-    E1090-A
-{{:azonenberg:microchip:23k256_07_bf_neo40x_annotated.jpg?600|}}
-Top left of SRAM array
-{{:azonenberg:microchip:23k256_08_bf_neo40x_annotated.jpg?600|}}
-Middle of SRAM array
-{{:azonenberg:microchip:23k256_09_bf_neo40x_annotated.jpg?600|}}
-Random logic, with focus on M4 and on M3
-{{:azonenberg:microchip:23k256_10_bf_neo40x_annotated.jpg?600|}}
-{{:azonenberg:microchip:23k256_11_bf_neo40x_annotated.jpg?600|}}