AEROFLEX DATA EXCHANGE PROGRAM TRANSMITTAL PROBLEM ADVISORY 1. TITLE 2. DOCUMENT NUMBER MIL-STD-1553 RESIDUAL VOLTAGE DEPENDENCIES ON TRANSFORMER SELECTION WHEN INTERFACING TO AEROFLEX TRANSCEIVERS SPO-2015-PA-0001A 4. MANUFACTURER NAME AND ADDRESS 5. MANUFACTURER POINT OF CONTACT NAME AEROFLEX COLORADO SPRINGS INC., DOING BUSINESS AS COBHAM SEMICONDUCTOR SOLUTIONS 4350 CENTENNIAL BOULEVARD COLORADO SPRINGS, COLORADO 80907-3486 Tim Meade 3. DATE (Year, Month, Date) Amendment A: 2015, December, 11 6. MANUFACTURER POINT OF CONTACT TELEPHONE 719-594-8048 7. MANUFACTURER POINT OF CONTACT EMAIL [email protected] 8. CAGE CODE 9. LDC START 10. LDC END 11. PRODUCT IDENTIFICATION CODE 12. BASE PART 65342 ALL ALL JB01-05; BA02; MM016-27 UT63Mxxx; UT69151xxxx 14. SMD NUMBER 15. DEVICE TYPE DESIGNATOR See Sheet 3 See Sheet 3 16. RHA LEVELS 17. QML LEVEL ALL ALL 18. NON QML LEVEL 19. BLANK 13. BLANK ALL 20. PROBLEM DESCRIPTION / DISCUSSION / EFFECT This AMENDMENT has been issued to include supplemental information. Sheet 1 summarizes the supplemental information being added to previously published information. Sheets 2 and 3 contain the original Problem Advisory text. Sheets 4 onward are replaced with the latest revision of the comprehensive vendor supplied Product Advisory. This Amendment is complete. 21. ACTION TAKEN / PLANNED (1) Add Beta Transformer Technology Corporation β BTTC β(http://bttc-beta.com) as a recommended supplier of compatible transformers with Cobhamβs MIL-STD-1553 transcievers. (2) Append a compatibility summary for BTTC transformers to Cobham transceivers to Cobhams comprehensive residual voltage Product Advisory. (3) Propose an acceptable leakage inductance limit for compatibility with Cobham transceivers. Lleak1 Cobham proposes: -20% < Relative % differential leakage inductance < +20% πΈπΈ1. π π π π π π π π %β πΏπΏπΏπΏπΏ = πΏπΏπΏπΏπΏ1βπΏπΏπΏπΏπΏ2 πΏπΏπΏπΏπΏ1+πΏπΏπΏπΏπΏ2 β 100 ; where Lleak1and Lleak2 are the leakage inductances on pin 1 and pin 3 of the transformer, respectively. Lleak2 22. DISPOSITIONARY RECOMMENDATION: 23. ADEPT REPRESENTATIVE CHECK & β USE AS IS 24. SIGNATURE CONTACT MANUFACTURER Lin-Chi Huang ADEPT PA FORM β REMOVE & REPLACE β CORRECT & β USE AS SPECIFIED 25. DATE 11 December, 2015 REVISON DATE: 8/15/2013 SHEET 1 REVISION: B AEROFLEX DATA EXCHANGE PROGRAM TRANSMITTAL PROBLEM ADVISORY 1. TITLE 2. DOCUMENT NUMBER MIL-STD-1553 RESIDUAL VOLTAGE DEPENDENCIES ON TRANSFORMER SELECTION WHEN INTERFACING TO AEROFLEX TRANSCEIVERS SPO-2015-PA-0001 4. MANUFACTURER NAME AND ADDRESS 5. MANUFACTURER POINT OF CONTACT NAME AEROFLEX COLORADO SPRINGS INC., DOING BUSINESS AS COBHAM SEMICONDUCTOR SOLUTIONS 4350 CENTENNIAL BOULEVARD COLORADO SPRINGS, COLORADO 80907-3486 3. DATE (Year, Month, Date) 2015, February, 25 Tim Meade 6. MANUFACTURER POINT OF CONTACT TELEPHONE 719-594-8048 7. MANUFACTURER POINT OF CONTACT EMAIL [email protected] 8. CAGE CODE 9. LDC START 10. LDC END 11. PRODUCT IDENTIFICATION CODE 12. BASE PART 65342 ALL ALL JB01-05; BA02; MM016-27 UT63Mxxx; UT69151xxxx 14. SMD NUMBER 15. DEVICE TYPE DESIGNATOR (See Sheet 2) See Sheet 2 16. RHA LEVELS 17. QML LEVEL ALL ALL 18. NON QML LEVEL 19. BLANK 13. BLANK ALL 20. PROBLEM DESCRIPTION / DISCUSSION / EFFECT Aeroflex recently worked with a customer who observed unexpectedly high residual voltage amplitude and a high degree of residual voltage variance across a small sample of MIL-STD-1553 terminals during system level testing. A bus monitor flagged the anomaly while the Terminal-Under-Test maintained error free communication with the test side bus controller. MIL-STD-1553B requires that all MIL-STD-1553 terminals meet the output symmetry requirements as defined in section 4.5.2.1.1.4 for transformer-coupled (4.5.2.2.1.4 for direct-coupled) terminals. This requirement ensures that a terminal completing a transmission does not leave a residual voltage on the bus that interferes with the sync pulse of a subsequent message. If a residual voltage with a high enough amplitude is present on the bus while another terminal begins transmission, the residual voltage can affect the incoming message such that the intended target fails to properly decode the message. Output symmetry is strongly dependent upon electrical imbalances in the closed-loop system created by the digital MIL-STD-1553 protocol device, the differential transceiver, and a center-tapped isolation transformer. The problem investigation determined root cause of the elevated residual voltage was imbalanced transfer of energy from Aeroflexβs transceivers through isolation transformers due to parasitic elements within the transformer. There are several relevant transformer parameters that affect the transformer/transceiver performance. Transformer datasheets generally exclude these parameters. 21. ACTION TAKEN / PLANNED Presently, there are an increasing number of MIL-STD-1553 Transformer vendors in the market. Based on interoperability history and parametric performance, Aeroflex recommends selecting transformers from Pulse Electronics (http://www.pulseelectronics.com) and North Hills Signal Processing Corp. (http://www.nhsignal.com). Aeroflex also recommends that users perform additional parametric screening for transformers with a sorting preference toward balanced primary side leakage inductances and reflected impedances. The detailed Product Advisory appended to this notification includes a worksheet for additional parametric screening. Finally, Aeroflex recommends an evaluation of primary side signal integrity and half-bit time balance vs. residual voltage during brass board and engineering model checkout. If the circuit board uses a transformer vendor other than Pulse or North Hills, Aeroflex strongly encourages the system designer to perform a compatibility analysis. 22. DISPOSITIONARY RECOMMENDATION: 23. ADEPT REPRESENTATIVE CHECK & β USE AS IS 24. SIGNATURE CONTACT MANUFACTURER Lin-Chi Huang ADEPT PA FORM β REMOVE & REPLACE β CORRECT & β USE AS SPECIFIED 25. DATE February 25, 2015 REVISON DATE: 8/15/2013 SHEET 2 REVISION: B List of Applicable Products Applicable MIL-STD-1553 Transceivers as of February 2015 Generic Part SMD #s SMD #s #s 5962-0724201QXA 5962-9322603QXA 5962-0724201QXC 5962-9322603QXC 5962-0724201QYA 5962-9322603QZA 5962-0724201QYC 5962-9322603QZC 5962-0724201VXA 5962-9322603VXA 5962-0724201VXC 5962-9322603VXC 5962-0724201VYA 5962-9322603VZA 5962-0724201VYC 5962-9322603VZC 5962D0724201VYC 5962R9322603Q9A 5962R0724201QXA 5962R9322603QXA 5962R0724201QXC 5962R9322603QXC 5962R0724201QYA 5962R9322603QZA 5962R0724201QYC 5962R9322603QZC 5962R0724201VXA 5962R9322603VXA 5962R0724201VXC 5962R9322603VXC 5962R0724201VYA 5962R9322603VZA 5962R0724201VYC 5962R9322603VZC 5962F0724201QXA 5962F9322603QXA 5962F0724201QXC 5962F9322603QXC 5962F0724201QYA 5962F9322603QZA 5962F0724201QYC 5962F9322603QZC 5962F0724201VXA 5962F9322603V9A 5962F0724201VXC 5962F9322603VXA 5962F0724201VYA 5962F9322603VXC 5962F0724201VYC 5962F9322603VZA 5962G0724201QXA 5962F9322603VZC ADEPT PA FORM UT63M105CPCA UT63M105CPCC UT63M105CPPC UT63M125CBCA UT63M125CBCC UT63M125CBPC UT63M125CCCA UT63M125CCCC UT63M125CCPC UT63M125CDCA UT63M125CDCC UT63M125CDPC UT63M143BCA UT63M143BCC UT63M143BPC UT63M143CCA UT63M143CCC UT63M143CPC UT63M145BCA UT63M145BCC UT63M145CPC UT63M147BCA UT63M147BCC UT63M147BPC UT63M147CCA UT63M147CCC Applicable MIL-STD-1553 Protocol Devices with Integrated Transceivers as of February 2015 SMD #s 5962-9466308QXA 5962-9466308QXC 5962-9466308QYA 5962-9466308QYC 5962-9466309QXA 5962-9466311QYA 5962-9466311QYC 5962R9466311QYA 5962R9466311QYC 5962R9466311VYA 5962R9466311VYC 5962F9466311QYA 5962F9466311QYC 5962F9466311VYA 5962F9466311VYC 5962-9475808QXA Generic Part #s UT69151CDXEWCA UT69151CDXEWCC UT69151CDXEWPC UT69151CLXE15W UT69151CLXE15WPC UT69151CLXEWCA UT69151DXEGCA UT69151DXEGCC UT69151DXE-GPC UT69151DXEWCA UT69151DXEWCC UT69151DXEWPC UT69151LXE15GC UT69151LXE15GP UT69151LXE15WC UT69151LXE15WP 5962-9475808QXC UT69151RTE-FCC 5962-9475808QYA UT69151RTE-FPC 5962-9475808QYC UT69151RTE-GCA 5962-9475808QZA UT69151RTE-GCC 5962-9475808QZC UT69151RTE-GPC 5962-9475809QXA 5962-9475809QXC 5962-9475809QYA 5962-9475809QYC 5962-9858701QXA REVISON DATE: 8/15/2013 SHEET 3 UT69151RTEWCA UT69151RTEWCC UT69151RTE-WPC UT69151XTE12GC UT69151XTE12GP REVISION: B 5962G0724201QXC 5962G9322603QXA 5962G0724201QYA 5962G9322603QXC 5962G0724201QYC 5962G9322603QZA 5962G0724201VXA 5962G9322603QZC 5962G0724201VXC 5962G9322603VXA 5962G0724201VYA 5962G9322603VXC 5962G0724201VYC 5962G9322603VZA 5962H0724201QXA 5962G9322603VZC 5962H0724201QXC 5962H9322603Q9A 5962H0724201QYA 5962H9322603QXA 5962H0724201QYC 5962H9322603QXC 5962H0724201VXA 5962H9322603QZA 5962H0724201VXC 5962H9322603QZC 5962H0724201VYA 5962H9322603VXA 5962H0724201VYC 5962H9322603VXC UT63M147CPC UT63M147DIE 5962-9858701QXC 5962-9858701QYC 5962-9858701QZC UT69151XTE12WC UT69151XTE12WP UT69151XTE15GC UT69151XTE15GP UT69151XTE15WC UT69151XTE15WP UT69151XTE5GCA UT69151XTE5GCC UT69151XTE5GPC UT69151XTE5WCA UT69151XTE5WCC UT69151XTE5WPC UT69151XTE5ZCA UT69151XTE5ZCC UT69151XTE5ZPC 5962H9322603VZA 5962H9322603VZC 5962P9322603QZA ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 4 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 5 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 6 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 7 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 8 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 9 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 10 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 11 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 12 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 13 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 14 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 15 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 16 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 17 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 18 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 19 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 20 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 21 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 22 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 23 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 24 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 25 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 26 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 27 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 28 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 29 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 30 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 31 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 32 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 33 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 34 REVISION: B ADEPT PA FORM REVISON DATE: 8/15/2013 SHEET 35 REVISION: B