CK falling). All I/Os are synchronized with a single ended DQS or differential DQS pair in a source
synchronous fashion. These devices operate with a single 1.5V ± 0.075V and 1.35V
-0.067V/+0.1V power supply and are available in BGA packages.
1.3. U801 (YDA176-QZE2)
YDA176 is a high-performance digital audio amplifier IC that delivers up to 15W×2ch,
which has a digital audio interface, and is capable of operating at a supply voltage ranging from
5V*1) to 18V. YDA176, with Yamaha original Pure Pulse Direct Speaker Drive Circuit, allows
a speaker to be directly connected to the output. In addition, this amplifier is insusceptible to supply
voltage fluctuation because of a feedback-type digital amplifier, and have the feature with high
power supply noise tolerance.As a result, power supply can be simplified and allowing a simple
amplifier system with less external components to be configured. YDA176 has the following
functions: gain setting function, power limit function, pop noise reduction function, over current
protection function for speaker output pins, internal over temperature protection function, under
voltage lockout, and DC detection function.
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