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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 13269
http://forums.xgecu.com/attachment.php?aid=1112&k=5597491287d14c4adce2f5b5a9f78ede&t=1785853931&sid=bBZ3k3

图片附件: 74188 (Blank) - Logic Test.jpg (2021-12-25 03:00, 327.84 KB) / 下载次数 12247
http://forums.xgecu.com/attachment.php?aid=1113&k=3454789eeb25da8e9f9c41fe5b99d06a&t=1785853931&sid=bBZ3k3

图片附件: K155RE3 (SN74188N).jpg (2021-12-25 03:00, 589.09 KB) / 下载次数 13302
http://forums.xgecu.com/attachment.php?aid=1114&k=88e92628af4ab614a3e5d925721a48b2&t=1785853931&sid=bBZ3k3

附件: TI 54-54S-74-74S Programmable Read-Only Memories.pdf (2021-12-25 03:01, 366.25 KB) / 下载次数 9567
http://forums.xgecu.com/attachment.php?aid=1115&k=4e069837d907e2662a1fd011aa471434&t=1785853931&sid=bBZ3k3

附件: DM74S188-NationalSemiconductor.pdf (2021-12-25 03:01, 119.89 KB) / 下载次数 7848
http://forums.xgecu.com/attachment.php?aid=1116&k=d488d44e2d4ffc6c75b7daf0f7e0faab&t=1785853931&sid=bBZ3k3

附件: 74188 (Blank).lgc (2021-12-25 03:01, 2.83 KB) / 下载次数 39587
http://forums.xgecu.com/attachment.php?aid=1117&k=a1aac0e544823e15a710cff596a56cd7&t=1785853931&sid=bBZ3k3

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 38291
http://forums.xgecu.com/attachment.php?aid=1541&k=b4da648a5467f0a31540ddf0b9cf54b6&t=1785853931&sid=bBZ3k3

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