The BU9312AKS is a CD servo signal processing IC that contains a speed doubling unadjusted PLL, program servo, and signal processor, and that delivers low voltage operation and low power consumption. This IC is ideal for miniaturized, low-power-consumption applications.

Features
1) Internal PLL circuit, allowing EFM data demodulation
   and bit clock sampling with minimum attached components.
2) Frame synch signal detection and protection.
3) Internal focus, tracking and thread servo filters.
   Characteristics can be controlled with commands
   from the controller.
4) Subcode serial output pin.
5) Output pins for P code and Q code.
6) Internal CLV sequencer that automatically sets the CLV mode.
7) Internal track jump sequencer that jumps the desired number of tracks.
8) Single-chip IC with deinterleaving function and
   internal C1 / C2 double error detection, correction
   and flag processor.
9) Signals to DAC are output via MSB fast 2’SCOMP
   serial outputs, enabling control of ON / OFF
   operation of CD-ROM interpolators.
10) 16k bits of internal SRAM, for the storage of up to
   ± 4 frames of jitters.
11) Doubled-speed playback.

Applications
   Portable CD players, portable stereos and mini component stereo systems