March 3, 2006 Dear Customer: The purpose of this letter is to update you on the die inventory of our 5V 4M SRAM Quantified Commercial-Off-The Shelf (QCOTSTM) used in the UT9Q512K8 and UT9Q512K32 products. In June 2005 we announced the finite supply of the commercial die source would exhaust in 6 to 8 months. The die inventory has exhausted. A very small amount of packaged units remain in finished goods inventory. The shielded 36-lead CFP is now obsolete. Products affected by the die are listed below. Product Part Number Standard Microcircuit Package Drawing 5V 4M SRAM UT9Q512K8 5962-00536 36-lead CFP 36-lead CFP1 (Shielded) 5V 16M SRAM MCM UT9Q512K32 5962-01511 68-lead CQFP Note: 1. The 36-lead Shielded CFP has reached End of Life (EOL). As an alternative SRAM solution, Aeroflex offers a 3-volt (3V) 4M and 16M SRAM, UT8Q512K8 and UT8Q512K32 QCOTS SRAM. Data Sheets for the 3V QCOTS SRAM solutions can be found at www.aeroflex.com/QCOTS. Product Status Part Number 3V 4M SRAM In Production UT8Q512K8 Standard Microcircui t Drawing 5962-99607 3V 16M SRAM MCM 5V 4M SRAM 5V 16M SRAM MCM In Production UT8Q512K32 5962-01533 In Development In Development UT9Q512K8E UT9Q512K32E 5962-005362 5962-015333 Note: 1. 2. 3. Lead Time Package 6 to 8 wks 36-lead CFP 36-lead CFP1 (Shielded) 68-lead CQFP 6 to 8 wks 4Q06 4Q06 36-lead CFP 68-lead CQFP The 36-lead Shielded CFP has reached End of Life (EOL). It will be added as devices 5 and 6 to the SMD. It will be added as devices 3 and 4 to the SMD. Aeroflex continues to make progress in the development of a 5V 4M replacement based on existing Aeroflex development memory technology. The 5V replacement product would be available in late-2006 to a QML Q and V level. At this time, we continue to project the 5V 4M SRAM will be a functional replacement. The following AC and DC Electrical Characteristic differences have been identified. AC and DC Electrical Characteristic Differences (4M SRAM) Specification Existing New IDD2 (SB) @ 0MHz (-55oC & 25oC) 6mA 8mA IDD2 (SB) @ 0MHZ (125oC) 12mA 20mA tWHQX 5ns (min) 4ns (min) tWHAX 0ns (min) 2ns (min) Note: 1. At maximum operating speed the new 4M uses 80% less current - 30mA vs. 180mA AC and DC Electrical Characteristic Differences (16M SRAM) Function Existing New IDD2 (SB) @ 0MHz (-55oC & 25oC) 24mA 32mA IDD2 (SB) @ 0MHZ (125oC) 48mA 80mA 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 new 16M uses 80% less current - 720mA vs. 100mA Aeroflex packaging engineers have identified fit and form differences in both the 4M and 16M packages. A comparison of the package differences is shown below. For application questions regarding fit, form, and function of either the current 3V QCOTS SRAM or the new 5V SRAM replacement, please contact Don Cooper at (719) 594-8148 or e-mail [email protected]. Fit and Form Differences 4M Package Differences Existing Length .920 + .010 Width .480 + .005 Height .124 + .013 New .920 + .010 .580 + .005 .117 + .013 16M Package Differences Length (ceramic) Width (ceramic) Height (includes lids) Existing .880 + .009 .880 + .009 .205 + .016 New .980 + .009 .980 + .009 .209 + .020 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