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标题: New Logic Test - 74188 Vector Table [打印本页]

作者: yovish 时间: 2021-12-25 03:02 标题: New Logic Test - 74188 Vector Table

Enclosed is the new layout to be added to the logic tests.
The test was performed on the K155RE3 (256-bit, 32x8bit words PROM, open-collector outputs, analogue SN74188N) chip from IC/Microchip USSR (now Russia).

This IC is a PROM (Programmable Read Only Memory), so general testing only makes sense for a blank/clean, non-programmed chip. Because after programming, each chip can have different contents.

In the unprogrammed state, a low voltage is generated at all outputs of the 74188 microchip (74S188).

图片附件: 74188 (Blank) - Logic Vector.jpg (2021-12-25 02:59, 510.56 KB) / 下载次数 13417
http://forums.xgecu.com/attachment.php?aid=1112&k=c3f019d8cca93fd7ebd58a53309a8c0e&t=1789867561&sid=oc7zJg

图片附件: 74188 (Blank) - Logic Test.jpg (2021-12-25 03:00, 327.84 KB) / 下载次数 12396
http://forums.xgecu.com/attachment.php?aid=1113&k=6b95eb31cf3351bd15379bad1250e3f8&t=1789867561&sid=oc7zJg

图片附件: K155RE3 (SN74188N).jpg (2021-12-25 03:00, 589.09 KB) / 下载次数 13469
http://forums.xgecu.com/attachment.php?aid=1114&k=e1232044b5fc4d70a6bff237c8ce4b21&t=1789867561&sid=oc7zJg

附件: TI 54-54S-74-74S Programmable Read-Only Memories.pdf (2021-12-25 03:01, 366.25 KB) / 下载次数 9794
http://forums.xgecu.com/attachment.php?aid=1115&k=a3004eb8c104697e4266e629b9264ea4&t=1789867561&sid=oc7zJg

附件: DM74S188-NationalSemiconductor.pdf (2021-12-25 03:01, 119.89 KB) / 下载次数 8023
http://forums.xgecu.com/attachment.php?aid=1116&k=b8160ff12d32df32240eb397a987e285&t=1789867561&sid=oc7zJg

附件: 74188 (Blank).lgc (2021-12-25 03:01, 2.83 KB) / 下载次数 39882
http://forums.xgecu.com/attachment.php?aid=1117&k=4fb2505d3f3a1e90a58f91e53fbac88e&t=1789867561&sid=oc7zJg

作者: Victor87 时间: 2022-11-7 02:46

Testing for a blank/clean PROM К556РТ4 (82S126) (256x4) bits

82S126.lgc (8.06 KB)

附件: 82S126.lgc (2022-11-7 02:45, 8.06 KB) / 下载次数 38591
http://forums.xgecu.com/attachment.php?aid=1541&k=35910ec379e7591eddf686287f6716f0&t=1789867561&sid=oc7zJg

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