XGecu Programmer Forums - Powered by Discuz! Board

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 6985
http://forums.xgecu.com/attachment.php?aid=1112&k=185662e30060261be5df7486d99e0382&t=1732285861&sid=1DQt1x

图片附件: 74188 (Blank) - Logic Test.jpg (2021-12-25 03:00, 327.84 KB) / 下载次数 6583
http://forums.xgecu.com/attachment.php?aid=1113&k=0b4627dca8ee3afae3d3d544d6f46a59&t=1732285861&sid=1DQt1x

图片附件: K155RE3 (SN74188N).jpg (2021-12-25 03:00, 589.09 KB) / 下载次数 7122
http://forums.xgecu.com/attachment.php?aid=1114&k=358cdd5f07e3a1f87a793dc0be47c698&t=1732285861&sid=1DQt1x

附件: TI 54-54S-74-74S Programmable Read-Only Memories.pdf (2021-12-25 03:01, 366.25 KB) / 下载次数 4311
http://forums.xgecu.com/attachment.php?aid=1115&k=d9dd3f34817661583e17c43fcf0f07e6&t=1732285861&sid=1DQt1x

附件: DM74S188-NationalSemiconductor.pdf (2021-12-25 03:01, 119.89 KB) / 下载次数 3956
http://forums.xgecu.com/attachment.php?aid=1116&k=015317c65101228148bdae0b3084a4f5&t=1732285861&sid=1DQt1x

附件: 74188 (Blank).lgc (2021-12-25 03:01, 2.83 KB) / 下载次数 15098
http://forums.xgecu.com/attachment.php?aid=1117&k=657d849719e28741034380a5421af97b&t=1732285861&sid=1DQt1x

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 13745
http://forums.xgecu.com/attachment.php?aid=1541&k=7ad7ea1cad91425f35e2a4d7cba575c1&t=1732285861&sid=1DQt1x

欢迎光临 XGecu Programmer Forums (http://forums.xgecu.com/)