[sci.electronics] Chip Identificationi wanted

mac@harris.cis.ksu.edu (Myron A. Calhoun) (02/04/90)

I need to repair my Yaesu FRG-8800 general coverage receiver
(one of the two local-oscillator PLL's is unlocking) and I'd
like to know what the following IC's are:

  MC14028BCP, MC14042BCP, MC14081BCP, and MC14555BCP  (I suspect
  these are just CMOS digital things, but I'd like to have a
  one-line description of their respective functions.)

  I'd also appreciate one-line descriptions of the following, but
  in this case I'm quite sure they are working; I'm just curious!
  MH63A05X0A12 (the main microprocessor; a 6305?)
  MN6147, AN6552, and PC1037H.

I have a service manual with schematics, etc., but nowhere does
it describe what the above are; it just gives part numbers.
Thanks in advance. --Myron.
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jwatts@hpihoah.HP.COM (Jon Watts) (02/09/90)

>  MC14028BCP, MC14042BCP, MC14081BCP, and MC14555BCP  (I suspect
>  these are just CMOS digital things, but I'd like to have a
>  one-line description of their respective functions.)

I can't identify the others but the MC14555BCP is a CMOS version of the old 555
timer (one-shot) chip.

jack@focsys.uucp (Jack Houde) (02/10/90)

In article <5910002@hpihoah.HP.COM> jwatts@hpihoah.HP.COM (Jon Watts) writes:
>>  MC14028BCP, MC14042BCP, MC14081BCP, and MC14555BCP  (I suspect
>>  these are just CMOS digital things, but I'd like to have a
>>  one-line description of their respective functions.)
>
>I can't identify the others but the MC14555BCP is a CMOS version of the old 555
>timer (one-shot) chip.

MC14028BPC

BCD-to-Decimal/Binary-to-Octal Decoder

MC14042BPC

Quad Transparent Latch

MC14081BPC

Quad 2-Input AND Gate

MC14555BPC

Dual Binary to 1-of-4 Decoder (Active High Outputs)


I have the spec. sheets if your interested.