August 31 , 2007 Dear Customer: The purpose of this letter is to inform you that Aeroflex has a finite quantity of die inventory for our 3V 4M SRAM Quantified Commercial-Off-The Shelf (QCOTSTM) product used in the UT8Q512K8 and UT8Q512K32 devices. Aeroflex will continue to offer the remaining die until the inventory exhausts. Aeroflex’s replacement devices for the UT8Q512K8 and UT8Q512K32 devices are the new RadTolerant UT8Q512K8E and UT8Q512K32E based on Aeroflex’s memory technology designs. The new designs will be a functional replacement offered via SMD (Standard Microcircuit Drawing) and available mid-2008. Aeroflex successfully migrated our 5V 4M SRAM QCOTS in April 2007. Products affected by the die inventory Product Existing Part Number 3.3V 4M SRAM UT8Q512 3.3V 16M SRAM MCM UT8Q512K32 3.3V 8M SRAM UT8Q1024K8 Replacement Part Number UT8Q512E UT8Q512K32E Reached EOL Standard Microcircuit Drawing 5962-99607 5962-01533 5962-01532 Package 36-lead CFP 68-lead CQFP 44-lead CFP The following AC and DC Electrical Characteristic differences have been identified between the 3V QCOTS and the new 3V RadTolerant devices. AC and DC Electrical Characteristic Differences (4M SRAM) Specification UT8Q512 3V UT8Q512E 3V QCOTs RadTolerant IDD2 (SB) @ 0MHz (-55°C & 25°C) 6mA 8mA IDD2 (SB) @ 0MHZ (125°C) 12mA 40mA tWHQX 5ns (min) 4ns (min) tWHAX 0ns (min) 2ns (min) Note: 1. At maximum operating speed the RadTolerant replacement 4M device uses 80% less current (30mA vs. 180mA) AC and DC Electrical Characteristic Differences (16M SRAM) Specification UT8Q512K32 3V UT8Q512K32E 3V QCOTs RadTolerant IDD2 (SB) @ 0MHz (-55°C & 25°C) 6mA (per byte) 8mA (per byte) IDD2 (SB) @ 0MHZ (125°C) 12mA (per byte) 40mA (per byte) tGLQX 3ns (min) 0ns (min) tWHAX 0ns (min) 2ns (min) tWHQX 5ns (min) 4ns (min) tWHDX 0ns (min) 2ns (min) Note: 1. At maximum operating speed the RadTolerant replacement16M device uses 80% less current (30mA vs. 180mA per byte) Aeroflex packaging engineers have identified the following fit and form differences between the 3V QCOTS and the new 3V RadTolerant device packages. A comparison of the package differences is shown below. Fit and Form Differences 4M Package Dimension Differences UT8Q512 3V QCOTs .920 + .010 Length UT8Q512E 3V RadTolerant .920 + .010 Width .480 + .005 .580 + .005 Height .124 + .013 .117 + .013 16M Package Dimension Differences UT8Q512K32 3V QCOTs .880 + .009 Length (ceramic) UT8Q512K32E 3V RadTolerant .980 + .009 Width (ceramic) .880 + .009 .980 + .009 Height (includes lids) .205 + .016 .209 + .020 For application questions regarding fit, form, and function of the 3V QCOTS or the new 3V RadTolerant memory devices, please contact Mike Leslie at (719) 594-8148 or e-mail [email protected] Aeroflex provides this product information to allow customers to plan in advance of this product modification. If you have any questions please contact me at (719) 594-8252 or e-mail [email protected]. Aeroflex looks forward to continued business with your company. Regards, Anthony Jordan Director of Standard Products Aeroflex Colorado Springs