MIL-STD-1553 UT63M147 MIL-STD-1553A/B UT63M145 MIL-STD-1760 UT69151-DXE

Dear Customer: Aeroflex Colorado Springs (Aeroflex) appreciates your interest and use of our MIL-STD-1553 products, specifically

June 28, 2005 Dear Customer: Aeroflex Colorado Springs (Aeroflex) appreciates your interest and use of our MIL-STD-1553 MIL-STD-1553 products, specifically the 5-volt MIL-STD-1553 MIL-STD-1553 Bus Transceivers and the SµMMIT multi-chip modules that include these transceivers. This letter provides you with a status update (from our April, 2005 letter) for Aeroflex's UT63M147 UT63M147 MIL-STD-1553A/B MIL-STD-1553A/B Bus Transceiver (Standard Microcircuit Drawing 596293226) migration to a new wafer fabrication facility. Additionally, Table 1 lists all Aeroflex products, including 1553 multi-chip module products that are affected by the migration of the UT63M147 UT63M147. Because the migrated UT63M147 UT63M147 is designed to be form, fit, and functionally compatible to the original transceiver, Aeroflex does not intend to change the SMD device type for any product affected by the transceiver replacement. In the previous customer notification letters, Aeroflex advised that the UT63M145 UT63M145 MIL-STD-1760 MIL-STD-1760 Bus Transceiver (Standard Microcircuit Drawing 5962-93226) would not be migrated along with the UT63M147 UT63M147. As of April 4, 2005, deliveries of the UT63M145 UT63M145 have ceased. The only specification difference between the UT63M147 UT63M147 and the UT63M145 UT63M145 is transformer-coupled output voltage bus swing: · · 18V-27V peak-peak, line-line for the UT63M147 UT63M147 22V-27V peak-peak, line-line for the UT63M145 UT63M145 As of June 03, 2005, the original inventory of UT63M147 UT63M147 die has been exhausted. Therefore, no products that are based on the UT63M147 UT63M147 can be shipped until the migrated version of the transceiver is qualified. Revision C of the UT63M147 UT63M147 MIL-STD-1553A/B MIL-STD-1553A/B Bus Transceiver is scheduled to start wafer fabrication in early July 2005 on an expedited basis. Upon receipt of wafers, Aeroflex will expedite product qualification, 1553 validations testing, and product shipments. Aeroflex projects stand-alone UT63M147 UT63M147 transceivers and SµMMIT multi-mode modules, using the new UT63M147 UT63M147 transceiver, to be available in September 2005. We expect to fulfill all current backlog orders by October 31, 2005. Although the new 5V-volt transceiver is designed to be a direct replacement to the existing UT63M147 UT63M147 product, the wafer foundry and process change (Monolithic Bipolar to 0.6µm CMOS), may result in AC and DC electrical performance differences. Aeroflex will keep you apprised of any performance differences that are identified via written notification and our web site (www.aeroflex.com/avionics). Table 1 is a listing of all the Aeroflex Colorado Springs products affected by the transceiver migration. Table 1. Cross Reference of the Affected Aeroflex Products Generic Part Number UT63M147 UT63M147 UT63M145 UT63M145 SMD Number 5962*93226 5962*93226 UT69151-DXE UT69151-DXE 5962*94663 UT69151-XTE5 UT69151-XTE5 5962-94758 UT69151-RTE UT69151-RTE 5962-98587 PIC = Aeroflex Product Identification Code Device Type1 03 04 08 11 08 01 Old PIC#: AC01A AC01A AC02A AC02A MM016B MM016B MM023A MM023A MM025A MM025A MM027A MM027A MM019E MM019E MM022B MM022B Note: 1. Device types do not change with the migration If you have any questions, please contact me at (719) 594-8252 or jordan@Aeroflex.com. Regards, Anthony F. Jordan Director of Standard Products Aeroflex Colorado Springs New PIC#: JB01A JB01A Obsolete MM016C MM016C MM023B MM023B MM025B MM025B MM027B MM027B MM019F MM019F MM022C MM022C