Processors
Intel® Pentium® Processor
Conversion Whitepaper

Notice: Information provided in this conversion package is provided AS IS, and Intel® specifically disclaims any warranty, express or implied, that the use of the information does not infringe any intellectual property right of another party, and disclaims any and all liability that may arise there from.

Conversion # SMD930012 d escription of change:

The entire Pentium® Processor Family is converting from the B-1 step to the C-1 step. The C-1 step will improve overall availability and bin-split to 66MHz. The C-1 step also corrects all B-1 errata. The C-1 step Pentium® processors are functionally and pin compatible with B-1 step production parts.

There are no changes to electrical characteristics. Customers following Intel's design specifications will be able to plug the C-1 step into existing boards without modifications. The C-1 step will be made using the same fab / assembly / test sites currently manufacturing the B-1 step.

The C-1 step conversion includes implementation of a heatspreader on all devices.

All Pentium® processors will also convert to an Adhesive Die Attach (ADA) process. This change is scheduled to slightly lag the C-1 step implementation - initial C-1 step samples and production will be assembled using the current Eutectic Die-attach process. This is the same ADA process step which has already been qualified and implemented on the entire Intel486Ô CPU Product line, (reference Conversion #SMD920009 published November 1992 and Conversion #A01920013 published April 1993).

Finally, there is a change to the package marking associated with the conversion to the C-1 step die. Please see the attached mark diagram for details.

C-1 step order information:

Sample Order Info: Frequency Voltage/Clock/Package Order Code
 
  60 4.75V-5.25V/1X/A Q 0436
 
Production Order Info: 60 4.75V-5.25V/1X/A S X835
  66 5.15V-5.4V/1X/A S X836
  66 4.9V-5.4V/1X/A S X837

Pentium® conversion white paper t iming:

Milestone
Conversion Whitepaper Done
Limited Sample Availability October 1993
General Sample Availability November 1993
Initial Production Availability Early November 1993
Full Production Availability Beginning of January 1994
Customer Qualification Complete Beginning of January

Pentium® (C-1) processor mark diagram The next several pages show the mark diagrams for:

  • Production units of the the new Pentium® Processor C-1 Stepping with heatspreader (the inner box-outline in the diagram below)

  • Samples of the C-1 Stepping (again with the heatspreader)

  • Production mark diagram for the B-1'' stepping without the heatspreader for comparison.


Production mark diagram

Notes:

The inner line box defines the edge of the heatspreader.
Ink Mark = All Logo information on the heatspreader.
Laser Mark = The two lines of information above and below the heatspreader.
SS = Speed
NNN = Specification Number
FFFFFFFF = FPO # (Test Lot Traceability #).

Pentium® (C-1) processor mark diagram
Samples mark diagram

The mark diagram for samples is identical to production units with one exception:

    The second line of the sample mark diagram begins with 'Q' instead of 'S'. The rest of this line is a QDF # instead of an S-spec #; samples are ordered by QDF#.

Notes:

The inner line box defines the edge of the heatspreader.
Ink Mark = All Logo information on the heatspreader.
Laser Mark = The two lines of information above and below the heatspreader.
SS = Speed
NNNN = Sample QDF number
FFFFFFFF = FPO # (Test Lot Traceability #).

Pentium® (B-1'') processor mark diagram
Production mark diagram (without heatspreader)

Notes:

The inner line box defines the edge of the heatspreader.
Ink Mark = All Logo information on the heatspreader.
Laser Mark = The two lines of information above and below the heatspreader.
SS = Speed
NNN = Specification Number
FFFFFFFF = FPO # (Test Lot Traceability #).

This applies to:

Intel® Pentium® Processor



Solution ID: CS-011042
Last Modified: 11-Dec-2014
Date Created: 12-May-2004
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