rzh@lll-lcc.UUCP (Roger Hanscom) (04/25/89)
A friend gave me a junked 19" rack mount box that contains 3
or 4 boards populated with lots of Motorola CMOS ic's (dual
4-bit latches, decoders, counters, bit-rate generator, etc.)
and relays. One of the boards seems to contain the controller
that selects or switches among data paths or channels. I
think that I can identify almost everything in the box except
the processor chip on the controller card and some TI 16-pin
chips marked ULN2003AN. Can anybody help here?? Are these
transistor arrays?? The controller (CPU?) is marked TR 1402-A,
is a 40 pin ceramic DIP, and is stamped with what looks like
an integral symbol through an "oh" :
_
/
O
/
- (hard to draw with these things!)
Oh, and there's an HP 8-pin chip marked 2601 and then 830
xx below it where xx looks like a UR run together and reversed
(mirror image).
Anyone care to speculate about the function of the chips/box??
roger rzh%freedom.llnl.gov@lll-lcc.llnl.gov
ucbvax!lll-lcc!freedom!rzh
Upstairs, Over a Vacant Lot, Inc.mj@elmgate.UUCP (Mark Johnson OPER) (04/26/89)
I'm posting a followup because I can't find a Use(less)net address for lll-llc.UUCP. Hit 'n' unless you wondered about the 2003's also. In article <2444@lll-lcc.UUCP>, rzh@lll-lcc.UUCP (Roger Hanscom) writes: > the processor chip on the controller card and some TI 16-pin > chips marked ULN2003AN. Can anybody help here?? Are these > transistor arrays?? That's right. I *think* they're open collector - I'm pretty sure I have some data sheets on these things at home; send me an address via email if you want copies. Can't help with the other chips. ------------------------------------------------------------------------------- Mark A Johnson Eastman Kodak Company - SISD UUCP: rochester!kodak!elmgate!mj USPS: 222 Norman Road, Rochester NY 14623 WORK: (716) 726-7035 "Quidquid latine scriptum, altum videtur."
mjr@hpcvca.CV.HP.COM (Mark Reed) (04/27/89)
ULN2003A is, according to my Sprague handbook, a 7-channel 50 V, 500 mA output Darlington driver. Pins 1-7 are the inputs, 16-10 the corresponding outputs, 7 is ground, and 9 is a common - each output has a diode "pointing toward" common. No doubt nice for bypassing kickback from inductive loads. The 1402 may be an RCA CMOS micro. (?)
fwb@demon.siemens.com (Frederic W. Brehm) (04/29/89)
In article <3340003@hpcvca.CV.HP.COM> mjr@hpcvca.CV.HP.COM (Mark Reed) writes: ... > The 1402 may be an RCA CMOS micro. (?) No, the RCA micro is 1802 (a.k.a. COSMAC). I don't know what a 1402 is, though.
cook@stout.ucar.edu (Forrest Cook) (05/03/89)
>In article <3340003@hpcvca.CV.HP.COM> mjr@hpcvca.CV.HP.COM (Mark Reed) writes: >> The 1402 may be an RCA CMOS micro. (?) >No, the RCA micro is 1802 (a.k.a. COSMAC). I don't know what a 1402 is, I think the 1402 is one of those old fashioned UART chips. (Universal Asynchronous Receiver/Transmitter) They are (were) typically used to implement RS-232 async serial to parallel conversion. ^ ^ Forrest Cook - Beware of programmers who carry screwdrivers - LB /|\ /|\ cook@stout.ucar.edu (The preceeding was all my OPINION) /|\ /|\ {husc6|rutgers|ames|gatech}!ncar!stout!cook /|\ /|\ {uunet|ucbvax|allegra|cbosgd}!nbires!ncar!stout!cook
pnelson@antares.UUCP (Phil Nelson) (05/07/89)
In article <3128@ncar.ucar.edu> cook@stout.UCAR.EDU (Forrest Cook) writes: >>In article <3340003@hpcvca.CV.HP.COM> mjr@hpcvca.CV.HP.COM (Mark Reed) writes: >>> The 1402 may be an RCA CMOS micro. (?) >>No, the RCA micro is 1802 (a.k.a. COSMAC). I don't know what a 1402 is, > >I think the 1402 is one of those old fashioned UART chips. >(Universal Asynchronous Receiver/Transmitter) They are (were) typically used >to implement RS-232 async serial to parallel conversion. > Probably you are thinking of the TR1602 UART, made by Western Digital. I did not see the original question (I haven't been able to keep up with the net), but I looked in an old IC Master, it lists a 1402A dynamic shift register (256 bits by 4 registers) made by AMD, Intel, Synertek. I have a data sheet in a 1978 Synertek catalog. (of course I don't have any idea if this is the answer, since I don't know what the question was :-)) By the way, are there any other 1802 hackers out there? The 1802 was my Idea of the perfect computer, I even built a couple. The power supply was 4 size 'D' NiCd batteries, with a trickle charger at home. I didn't have to go home too often though, It could go a week or two between charges. > > ^ ^ Forrest Cook - Beware of programmers who carry screwdrivers - LB >/|\ /|\ cook@stout.ucar.edu (The preceeding was all my OPINION) >/|\ /|\ {husc6|rutgers|ames|gatech}!ncar!stout!cook >/|\ /|\ {uunet|ucbvax|allegra|cbosgd}!nbires!ncar!stout!cook -- Phil Nelson at (but not speaking for) OnTyme:NSC.P/Nelson Tymnet, McDonnell Douglas Network Systems Company Voice:408-922-7508 UUCP:{pyramid|ames}oliveb!tymix!pnelson LRV:Component Station "ding ding..." -Santa Clara County Transit Company trolley car (AKA "LRV")