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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 2221
http://forums.xgecu.com/attachment.php?aid=1112&k=03007cfc91d76c430906a138ae5ed096&t=1702155168&sid=ey5Ne8

图片附件: 74188 (Blank) - Logic Test.jpg (2021-12-25 03:00, 327.84 KB) / 下载次数 2242
http://forums.xgecu.com/attachment.php?aid=1113&k=a98b121a20dd56c7e9f39063501c3b71&t=1702155168&sid=ey5Ne8

图片附件: K155RE3 (SN74188N).jpg (2021-12-25 03:00, 589.09 KB) / 下载次数 2273
http://forums.xgecu.com/attachment.php?aid=1114&k=748c737cad5f3dd60396ca4455818504&t=1702155168&sid=ey5Ne8

附件: TI 54-54S-74-74S Programmable Read-Only Memories.pdf (2021-12-25 03:01, 366.25 KB) / 下载次数 1363
http://forums.xgecu.com/attachment.php?aid=1115&k=703d8bc6155f92461323f74f49928443&t=1702155168&sid=ey5Ne8

附件: DM74S188-NationalSemiconductor.pdf (2021-12-25 03:01, 119.89 KB) / 下载次数 1338
http://forums.xgecu.com/attachment.php?aid=1116&k=7b2ff2450c0a6f2bed0e81a6867f1d85&t=1702155168&sid=ey5Ne8

附件: 74188 (Blank).lgc (2021-12-25 03:01, 2.83 KB) / 下载次数 4217
http://forums.xgecu.com/attachment.php?aid=1117&k=5afb091a7e005ad543f1875d4fb15982&t=1702155168&sid=ey5Ne8

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 2858
http://forums.xgecu.com/attachment.php?aid=1541&k=0f04704f3fec45be0c5dfad096dd8372&t=1702155168&sid=ey5Ne8

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