On Sun, 03 Nov 2013 01:14:32 -0700, jurb6006 wrote:
>>"I don't believe that Signetics ever had a single chip PLL synthesizer
> chip, for AM/FM or otherwise."
> I think they did. It was a single chip solution used in tuners installed
> in NAP products in the US, like Maganvox, Grosley and who knows. the
> number did start with SA, and I tried to figure out what it was after
> that but gave up. google is good but.....
> It was a standard bus controlled PLL for NTSC US and I think it had an
> internal prescaler. the othe rchip in the tuner IIRC was the
> I doubt the chip was locked into the NTSC TV band so with the right data
> it could be used in anything witin its range, which would be from 54 Mhz
> to 0.89 Ghz.
> In the next few days, since this is inexorably stuck in my head, I will
> check a couple of databases using different numbers out of memory to see
> if I can hit the chip number. Send beer.
That matches my recollection. The ones that I recall looking at were
pretty specific to use -- when they said "TV tuner" that's what they
meant, and you didn't have much options to successfully wedge it into a
Wescott Design Services
Posted by Tim Wescott●November 3, 2013
On Sun, 03 Nov 2013 01:48:53 -0600, John S wrote:
> On 11/2/2013 8:36 PM, bitrex wrote:
>> I'm trying to remember the name of a certain IC. I believe it was a
>> PLL-type frequency synthesizer IC for AM/FM radios, to be used with an
>> external local oscillator. I'm fairly certain it had the prefix
>> SA-something, so it was a former Signetics chip. I don't think it's
>> still in production by NXP, though.
>> Any ideas?
> SA612, perhaps?