RF Cafe visitor Tony C., who is an engineer working for
one of America's great, longtime manufacturers of green farm equipment, sent me a link to this unique
memory IC released by Signetics on April 1, 1973. This being April 1, 2017, it seems to be an appropriate
day to post the Signetics 25120 Fully Encoded, 9046 x N, Random access Write-Only Memory datasheet that
"...was created 'as a lark' by Signetics engineer John G 'Jack' Curtis and was inspired by a fictitious
and humorous vacuum tube datasheet from the 1940s. It was seen as 'an icebreaker' and was deliberately
included in the Signetics catalog."
According to Wikipedia, founded in 1961 "Signetics [now NXP Semi] was an American electronics pioneer, it was the first electronics
manufacturer specifically established to make integrated circuits." They made the ubiquitous
Also, don't forget the classic datasheet for the Watkins-Johnson WJ-G1/SMG1 Voltage-Controlled Attenuator
datasheet with the Phase vs. VCTL vs. Frequency vs. Phase
of the Moon Chart. While you're wasting time, you might as well see the "slightly tentative data"
for WEMAC- The One Zed
Two Zed Vacuum Tube that was purportedly the inspiration for the Signetics 25120.
The inventions and products featured on these pages were chosen either for their uniqueness in the RF engineering realm, or are simply awesome
(or ridiculous) enough to warrant an appearance.
All Featured Product Archive Pages:
| 1 | 2 |
3 | 4 | 5 |
6 | 7 | 8 |
9 | 10 | 11
| 12 | | 13 | 14
| 15 | 16 | 17
| 18 | 19 | 20
| 21 |
Posted April 1, 2017