I have encountered a number of EXAR chips that were in amateur radio service.
A search of my library has not turned up any literature yet. Soo.... relying on my tired old brain, I recall, The XR2203 _may_ be a Bell 203 compliant modem chip that was used in 1200 bps amateur radio low-speed packet radio service. There was also a XR2206 FSK modulator used in similar service. A search of the EXAR web site at http://www.exar.com does not turn up anthing - S000....... I suggest that your next step would be to contact EXAR at the above URL and post an inquiry to their Tech Support group for further info on this now probably obsolete product. I agree that the Xref of XR2203 to a ULN2003 has to be an error. Best wishes, Bob Smith --- Avoid computer viruses, Practice safe hex --- -- Specializing in small, cost effective embedded control systems -- http://www.smithmachineworks.com/embedprod.html Robert L. (Bob) Smith Smith Machine Works, Inc. 9900 Lumlay Road Richmond, VA 23236 804/745-2608 [EMAIL PROTECTED] ----- Original Message ----- To: "Multiple recipients of list CHIPDIR-L" <[EMAIL PROTECTED]> Sent: Tuesday, October 19, 2004 1:10 PM > Are you sure? The TD62003 crosses with the ULN 2003, not ULN 2203 > > [EMAIL PROTECTED] wrote: > > >The only thing remotely close that I have found is XR2203, made by Exar, which crosses also with ULN2203 and TD62003. > >The XR2203 seems to be a 7 Darlington transistor array in a DIP16 package. Yours is a DIP14 however. Sorry, no cigar. > > > >Tony > > > >In a message dated 10/19/2004 5:25:29 AM Eastern Daylight Time, "Pieter Hoeben" <[EMAIL PROTECTED]> writes: > > > > > > > >>Hi, > >> > >> > >> > >>>Yes, the other markings are a block "S" signifying it's a Signetics > >>> > >>> > >>device and the number 2203 and below that > >> > >> > >>>9247V. > >>> > >>> > >>This means datecode 1992, week 47. > >> > >>Does the chip show this?: > >>============== > >>S > >> 4517535 > >> 2203 > >> 9247V > >>============== > >> > >>In that case the 2203 probably is the partnumber, not > >>the 4517535. Both codes are unknown to me. > >> > >> > >> > >>>>Subject: Re: 4517535 data? > >>>> > >>>> > >>>>>Does anybody have data on a Philips or Signetics > >>>>>4517535. > >>>>>Its a 14 pin DIP. > >>>>> > >>>>> > >>Regards, > >>Pieter Hoeben > >> > >>______________________________________________ > >> > >> Hoeben Electronics Phone: +31 6 51590081 > >> Ronkert 44 Fax: +31 13 5096025 > >> 5094 EW Lage Mierde Private: +31 13 5096200 > >> The Netherlands E-mail: [EMAIL PROTECTED] > >> http://www.hoeben.com > >>______________________________________________ > >> > >>-- > >>Author: Pieter Hoeben > >> INET: [EMAIL PROTECTED] > >> > >> > > -- > Author: Declan Moriarty > INET: [EMAIL PROTECTED] > > Fat City Hosting, San Diego, California -- http://www.fatcity.com > --------------------------------------------------------------------- > 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: Bob Smith INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- 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).
