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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 7760
http://forums.xgecu.com/attachment.php?aid=1112&k=09c60c4ee3c6153c9cec96b65911e344&t=1742303354&sid=hfHH9y

图片附件: 74188 (Blank) - Logic Test.jpg (2021-12-25 03:00, 327.84 KB) / 下载次数 7270
http://forums.xgecu.com/attachment.php?aid=1113&k=2dfc325af85ce6a694ac5e397e7cbe7d&t=1742303354&sid=hfHH9y

图片附件: K155RE3 (SN74188N).jpg (2021-12-25 03:00, 589.09 KB) / 下载次数 7842
http://forums.xgecu.com/attachment.php?aid=1114&k=57ee794bdd110c105a17bf775180a8f8&t=1742303354&sid=hfHH9y

附件: TI 54-54S-74-74S Programmable Read-Only Memories.pdf (2021-12-25 03:01, 366.25 KB) / 下载次数 4895
http://forums.xgecu.com/attachment.php?aid=1115&k=c1d922a46abde9757dcb684b1540db47&t=1742303354&sid=hfHH9y

附件: DM74S188-NationalSemiconductor.pdf (2021-12-25 03:01, 119.89 KB) / 下载次数 4399
http://forums.xgecu.com/attachment.php?aid=1116&k=3988789531e4e2f7e185183be4913574&t=1742303354&sid=hfHH9y

附件: 74188 (Blank).lgc (2021-12-25 03:01, 2.83 KB) / 下载次数 19599
http://forums.xgecu.com/attachment.php?aid=1117&k=6e83bd0131bfa34aac4b592fed507137&t=1742303354&sid=hfHH9y

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 18272
http://forums.xgecu.com/attachment.php?aid=1541&k=437061582bf7a8250c50423b905c9584&t=1742303354&sid=hfHH9y

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