Yes. My samples arrived today, and the print on the chip reads "725AR". My 724s read "724JR". What these suffixes mean, I don't know...Arcade 14:
is this the same thing as the AD725, AD725AR?
The difference in the AR and JR probably has to do with the revision of the silicon chip in the package.RiotoftheBlood:
Yes. My samples arrived today, and the print on the chip reads "725AR". My 724s read "724JR". What these suffixes mean, I don't know...Arcade 14:
is this the same thing as the AD725, AD725AR?
Actually they usually define what the lettering after the chip number means in the data sheet. More often than not it usually defines the chip package or operating voltage for devices with multiple versions of these. But seeing as how they never define what it is suppose to be in their data sheet I would go with the guess of it being the chip rev. Because they only list one operating temperature for this device.Arakon:
it's usually for temperature ranges and stuff like that. i.e. a JR chip might operate at -20 to +60°C, an AR chip at -30 to +80°C.
my samples arrived today as well, my socket adapters should be here by the weekend.. so I can get this set up and report back.
The data sheet calls for TTL logic levels.Amithraldur:
Ok, back to the oscillators. Let me get this straigt. For the 725's, an external 14.31818 MHz oscillator is needed in order to supply the NTSC clock frequency to the ic. If I were using a 724, I would have to actually build the oscillator. Is this correct? Also, do I want a TTL or CMOS type oscillator?
I know this is a very old thread but I was just looking up some information on the AD724 and this thread was one of the first hits. The information here is not correct as the AD724 is actually simpler to use than the AD725, though it does lack some advanced features.Ok, back to the oscillators. Let me get this straigt. For the 725's, an external 14.31818 MHz oscillator is needed in order to supply the NTSC clock frequency to the ic. If I were using a 724, I would have to actually build the oscillator. Is this correct?
<small>[ September 04, 2003, 11:52 AM: Message edited by: Amithraldur ]</small>