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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 4156
http://forums.xgecu.com/attachment.php?aid=1112&k=73bddaaa6722d1b24b547198e1c7d0e8&t=1713956091&sid=2saa8m

图片附件: 74188 (Blank) - Logic Test.jpg (2021-12-25 03:00, 327.84 KB) / 下载次数 4003
http://forums.xgecu.com/attachment.php?aid=1113&k=d9c64523d0ea48e55d0efd60b0fcffc8&t=1713956091&sid=2saa8m

图片附件: K155RE3 (SN74188N).jpg (2021-12-25 03:00, 589.09 KB) / 下载次数 4248
http://forums.xgecu.com/attachment.php?aid=1114&k=b8e3e7e4d7c31fc139ae9bc65d659355&t=1713956091&sid=2saa8m

附件: TI 54-54S-74-74S Programmable Read-Only Memories.pdf (2021-12-25 03:01, 366.25 KB) / 下载次数 2490
http://forums.xgecu.com/attachment.php?aid=1115&k=97cf0a850d494051f22be65a237175a4&t=1713956091&sid=2saa8m

附件: DM74S188-NationalSemiconductor.pdf (2021-12-25 03:01, 119.89 KB) / 下载次数 2356
http://forums.xgecu.com/attachment.php?aid=1116&k=dfbeb232155144a5c584d0711eed9cb2&t=1713956091&sid=2saa8m

附件: 74188 (Blank).lgc (2021-12-25 03:01, 2.83 KB) / 下载次数 8295
http://forums.xgecu.com/attachment.php?aid=1117&k=379df74806c5aea15b77176aed136145&t=1713956091&sid=2saa8m

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 6885
http://forums.xgecu.com/attachment.php?aid=1541&k=7f9aeff6f2e075ba96e934accc00f906&t=1713956091&sid=2saa8m

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