4 ms·
Indeed, another challenge is crystal aging. For example, PCF2129 has an aging offset register. These devices are rated to +-3ppm over the huge range of -30-80C
by erosenbe0 4y ago
Indeed, another challenge is crystal aging. For example, PCF2129 has an aging offset register. These devices are rated to +-3ppm over the huge range of -30-80C but the register allows for -7 to 8ppm offsets, if necessary.