January 15, 1996 Jeanne Warner Electronic Industries Association 2500 Wilson Boulevard Arlington, VA 22201 Dear Jeanne: Enclosed is a copy of the reviewer's comments and a revised copy of the technical portion of Version 2.1 of ANSI/EIA-656. Both copies have changes below highlighted. Also enclosed is a DOS disk which includes: 00readme This document ver2_1.ibs SECTION 6 Version 2.1 Technical Portion of ANSI/EIA-656 We accept all of the suggestions except those which relate to separating the numbers from the scaling units (e.g., 5mV versus 5 mV) in the actual examples only. It is acceptable common practice in computer processing to allow no space. Furthermore, we suggest eliminating entirely annex A. Annex A was included for the formal letter ballot process only. The changes that were documented were included in the main text and are still included. We have attempted to make all of the changes in a consistent manner, even if they were not marked by the reviewer (in a few instances). We have also made a few additional corrections for consistency reasons, and have recorded them below for your reference. PRELIMINARY MATERIAL We accept All of the reviewers corrections. Page i: We suggest removing Appendix ... 35 entirely. Page 2, "5 Anomalies" section: We would delete the existing section entirely, and include a statement to say "Version 2.1 of the IBIS specification has no anomalies." SECTION 6 Changes on Version 2.1 of I/O Buffer .... Page 3: We have made a global change from August 22, 1995 to December 13, 1995 to capture the date of ANSI/EIA-656 acceptance. We have changed the wording to plural tense at the question: "... allowing simulation vendors to derive models compatible with their own products." Pages 4, 5: [Comment char] changed to [Comment Char] for consistency of presentation of keywords. Thys change is also made in one occurance in the PACKAGE MODELING section. [File name] changed to [File Name] also for consistency of presentation of keywords. Page 6: Copyright 1994 changed to Copyright 1995 to be consistent with the December 13, 1995 date. Page 7: The suggested global changes were NOT adopted because the existing syntax in the examples is consistent with acceptable computer processing formats and are required for correct operation. Page 11: Additional instances were discovered in the text: 0 V and 0 ns. In the [Diff Pin] example, the units in the comments were deleted in 3 locations because there was not room for separation and because they were not needed. Page 12: Additional instances for separations: 0 mA and 0 mA Page 14: Four additional instances for separations: 0 V Page 19: We changed all "Ohm" in the example to "ohm", but did not separate the units. Page 20: We corrected the unexpected line wrap of "the waveform" Note Pages 22-30 were missing in our review copy. We corrected (PGAs.) to (PGAs). Pages 32, 34: All instances of 50C, 0C and 100C were changed to 50 deg C, 0 deg C and 100 deg C as the closest approximation to the suggested change. The text fonts do not support the degree symbol. We also changed 2.2V ot 2.2 V. Page 33: We also changed -2V to -2 V. We inserted a missing blank line before section d. ANNEX SECTION We suggest deleting this entire section. It is not relevant for the final published version of ANSI/EIA-656 because all of the suggested changes are included in the body of the standard. Bob Ross EIA/IBIS Open Forum Secretary Interconnectix, Inc. (503) 603-2523 cc: Patti Rusher IBIS Reflector