I have some chips in my collection that have a similar marking. They are 20-pin DIP chips and the top line is "<same logo> AMI 9208MDW". Pattern seems like that of your chip except it has "AMI" (as in AMI/Gould) instead of TIP(?). My chip is a 18CV8 PEEL PLD chip. In your case, I'd bet that they are the three DACs, one for each channel. The rest of the marking is probably an OEM marking. Another note: Mostek either sold out to, or became Thomson and then merged with SGS to become SGS-Thomson and then ST Microelectronics. They still make much of the former Mostek line, including the battery-backed SRAM modules with the MK prefix. ----- Original Message ----- To: "Multiple recipients of list CHIPDIR-L" <[EMAIL PROTECTED]> Sent: Friday, November 07, 2003 6:29 AM
> I have a 3 channel chart recorder for repair. The problem is an error > '9999.9 - ADFAIL' comes up on all three channels. At the heart of each > is a 28 pin plcc chip. It says > <logo> TIP > 9924NCC > C17619 > 120S1355 > REV 01 > > The logo is a smallish 'M' in a circle, but it's a very plain 'M', not > reminiscent of Motorola or Maxim, who use slightly fancy 'M' in their > logos. There is three of the above chips. The cpu is separate. > > Google returns rubbish, of course. > > It's about 5 years old, and I suspected a power supply, but all seems > good. It's a bit difficult to tell, because the circuit has loads of > little 78Lxx and low power lm317s in strange places and is inclined to > dissappear up it's own backside when you try and follow it ;-). All the > other stuff is Common enough (National/ST parts) and the transistors are > pro electron, so we appear safe from inscrutable Far Eastern devices. > > The other bits on each channel (taking a variety of temp probes) are a > 93LC66 (serial eprom) LM324, LM393, & some optocouplers. There isn't a > databus going off either. Serial? > > Nothing that looks like an a/d on the main board. A Mostek(!)48Z02 and a > Goldstar(That's an Irish meat company!) GM76C88AL-12 are the only things > beside logic, and the cpu, which is a 68HC11. > > Any ideas welcome. > > -- > > With best Regards, > > > Declan Moriarty. > -- > Author: Declan Moriarty > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB CHIPDIR-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). -- Author: Brad O'Dell INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
