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Can you please tell me why a company would put a chip into a 20 pin package when it only has 14 connected pins? Is it because the chip die is too big for a 14 pin DIP package? Thank you.
@Marty- My guess is that most of those NC pins are used to calibrate the device at the factory. Once calibrated, they need to remain unconnected to prevent any sort of re-calibration. Because this needs to be a rather precision device, the chips would need to be calibrated on an individual basis.
Because the crystal inside is fairly long … most 32.768KHz crystals are fairly longish, otherwise they’d be more than happy to save a few pennies in manufacturing on a smaller package.
Thank you very much for your answers gentlemen. I appreciate them. Have a great weekend!