Odd Chips

Unknown chip with "127754-1 Rev F" markings in flatpack package. Chips fully covered by gold always look nice.

Donated by Steve Galasinskiy.

AMI 7849DC in PGA package with gold pins. That's the only chip in white ceramic PGA package I know of, besides IBM 80386 processors (scroll down to see the picture). AMI also made some very nice looking processors, for example AMI S6800.

Comment from CENTiNEX: For the AMI PGA white chip, the part number is the second line of text on the chip. The first line (7849DC) is the date of manufacturing. I deducted that information from 6 of theses chips I have, they are plugged on old boards. There boards have the manufacturing date written on it, and this date is the same as the first two number of the first text line on the chips. Theses are series of chips, seems to work together 1845-xxxx, 2574-xxxx etc.

On these boards, there is even two funny looking white ceramic, GREEN painted chips, along with some white Beckman's made chips, and few white chips, wich seems to be some kind of memory, unknown manufacturer (logo is a "S").

Seems that all of these chips were made for this system, because the part number of the boards uses the same style of numbering as the chips got. These boards came from, as far as I know, an old computer, dated around 75-76. There are a "CBT" logo (with a large and styled B) on all of them, and this logo is reported on what seems to be an ROM (white and gold).

Beckman 899-1-R1K chip in CerDIP package. Black printing on white ceramic make chip look stylish.

Comment from Peter Glaskowsky: The "Beckman 899-1-R1K chip in CerDIP package" ... is a resistor network. I don't know the 899-1 prefix, but the R1K suffix means a 1K-ohm resistance. Inside this package, there are either seven independent resistors running from one side of the package to the other, or 12-13 resistors each going from a common pin to a different pin. Usually you can see the outline of the resistors through the surface of the package, sometimes with the aid of a strong light. Technicians usually use the visual-inspection method to figure out what kind of resistor network is in the package, rather than looking up the part number. :-)

Conographic 1000-011 chip in ceramic PGA package. The chip has unusual shape of the lid. Most PGA chips with lids have either round or rectangle lids.

Donated by Steve Galasinskiy.

Micro System International ML741CM in CerDIP package. Both top and bottom of the chip are covered by gold, only from a side it's possible to see white ceramic inside.

Donated by Jan Maika.

Sun STP2018TAB-50 MBus to SBus Interface chip in tape carrier package. In my opinion the chip looks simply beautiful and should be a part of any chip collection regardless of what this chip does.

RCA CD4024BD chip in CerDIP package. White ceramic chip always look more expensive and older than their brown ceramic/plastic DIP counterparts. Even if it's just a 7-bit counter.

Unknown chip in flatpack package soldered on a board.

Comment from Brad Thompson: The chip ... is quite likely a Sylvania SUHL ("Sylvania Universal High-level Logic") IC, an early TTL family. The PC-board frame allowed easy breadboarding and handling for test purposes. As a co-op work student in the early 1960s, I actually constructed a breadboard with a few of these ICs!