[sdiy] TI SN74LS624N, worth buying?

[Oren Leavitt]

I would certainly concur.

The LS62x are typically intended for PLL type applications. You'll get 
at best a few octaves of frequency control range. The control is not 
very linear, making a an accurate 1 volt/octave difficult if not impossible.
These could however be building blocks for a top octave generator, with 
the frequency control useful for some tuning and vibrato.

And, Jim! Great to hear from you. It's been a while, hope all is going well.

- Oren

On 11/7/2011 9:22 PM, James Patchell wrote:
> Uh....I would pass. They aren't very good VCO's. Not really directly
> musically usefull. I have never used the LS624, but I did use the S124
> way back when. It is a dual VCO, but the problem I had with these is
> that the coupling between them made them difficult to work with. I ended
> up just disabling one of the VCO's. But they do work at very high
> frequencies. I am sure somebody probably could come up with something
> creative, but in general, I would save my money.
>
> -Jim
>
> On 11/7/2011 5:12 PM, Bob K wrote:
>> The beginner is back with another IC question.
>>
>> What's everyone's opinion about the Texas Instrument's SN74LS624N chip?
>>
>> Digi-Key has about 380 in their inventory.
>>
>> http://search.digikey.com/us/en/products/SN74LS624N/296-3723-5-ND/377754
>>
>>
>> All I did was type in VCO in Digi-Key's website and this was the only
>> chip that showed in stock.
>>
>> $3.50 a piece.
>>
>> Are they worth stocking up on?
>>
>> And, no, I have no idea what I'm going to do with them (or what the
>> hell they do). I just got excited when I saw the magic words "Voltage
>> Controlled Oscillator" in the description.
>>
>> Are there any other chip-hoarders out there?
>>
>> -Bob
>>
>> Happy Monday. I wanna buy stuff.
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