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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 10753
http://forums.xgecu.com/attachment.php?aid=1112&k=1e37d9587e2fae751a3b8bb9636398c7&t=1768558880&sid=8tW1ME

图片附件: 74188 (Blank) - Logic Test.jpg (2021-12-25 03:00, 327.84 KB) / 下载次数 10054
http://forums.xgecu.com/attachment.php?aid=1113&k=663895f8e135363c4e975a541623a4f1&t=1768558880&sid=8tW1ME

图片附件: K155RE3 (SN74188N).jpg (2021-12-25 03:00, 589.09 KB) / 下载次数 10855
http://forums.xgecu.com/attachment.php?aid=1114&k=3297c3403664e11ebd4f81adafdf328e&t=1768558880&sid=8tW1ME

附件: TI 54-54S-74-74S Programmable Read-Only Memories.pdf (2021-12-25 03:01, 366.25 KB) / 下载次数 7141
http://forums.xgecu.com/attachment.php?aid=1115&k=60e6736416bcada5ecdae75e5539a42e&t=1768558880&sid=8tW1ME

附件: DM74S188-NationalSemiconductor.pdf (2021-12-25 03:01, 119.89 KB) / 下载次数 5934
http://forums.xgecu.com/attachment.php?aid=1116&k=a78305226a12cc5593517afb039a785a&t=1768558880&sid=8tW1ME

附件: 74188 (Blank).lgc (2021-12-25 03:01, 2.83 KB) / 下载次数 32447
http://forums.xgecu.com/attachment.php?aid=1117&k=71c183c2dd592a0ea5a05acfb1dff492&t=1768558880&sid=8tW1ME

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 31189
http://forums.xgecu.com/attachment.php?aid=1541&k=4fecb84e53eb7d312b7169dbc9ab3880&t=1768558880&sid=8tW1ME

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