In this video we will take a closer look at an I/O board from the HP83000 IC Test System. There's some good links below that I found with more information about the HP83000, but this video will be focusing on one of the I/O boards.
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The part number for this I/O board is E2771-66502P, and would have been one of up to 32 I/O boards in a single system. Each I/O board has 16 channels, meaning that a fully loaded 83000 system has a maximum capacity of 512 I/O channels for testing integrated circuits.
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What I’m specifically interested in about this I/O board are the Hybrid modules used for interfacing with the channels. There are a total of 8 of these hybrid ceramic modules, two on either side of a cooling block, which connects to a cooling channel that would have connected to an external cooling system via the included tubes.

Timestamps:
0:20 - First look at the I/O board, and teardown
2:18 - Hybrid Modules
2:57 - Elastomeric Connectors
4:27 - Removing the lid from the hybrid module
5:08 - First look under the microscope
5:50 - 1st Chip: AT&T ALA402
6:48 - 2nd Chip: VSLI VY05931A MUDAC
8:02 - 3rd Chip: Siemens E3041A1/S844B
8:51 - 4th Chip: Harris HFA5251
10:17 - 5th Chip: AT&T ALA210
11:29 - Final thoughts

References and Links for stuff used in this video:
HP83000 brochure: https://www.testequipmentdatasheets.c...
HP83000 photos of a unit that was for sale: https://www.bridgetronic.com/wp-conte...
Image of an HP83000 used in the video https://vse-pribory.ru/product/hp8300...

More photos of an HP83000 (not used in video):
https://www.tarasemi.com/listings/268...

Datasheets:
AT&T: https://bitsavers.org/components/att/...
Harris: https://datasheetspdf.com/mobile/7671...

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Thanks to E.Coli on the Chip Chat discord server for getting the last corner of the module to stitch that I used for the thumbnail.
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