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| Optical disc ICs Servo signal processor for CD BU9312AKS 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. FApplications Portable CD players, portable stereos and mini component stereo systems FFeatures 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. 79 Optical disc ICs FAbsolute maximum ratings (Ta = 25_C) BU9312AKS FRecommended operating conditions (Ta = 25_C) FBlock diagram 80 Optical disc ICs FPin description BU9312AKS 81 Optical disc ICs BU9312AKS 82 Optical disc ICs FInput / output circuits BU9312AKS FElectrical characteristics (unless otherwise noted, Ta = 25_C, VDD = 5V) 83 Optical disc ICs FExternal dimensions (Units: mm) BU9312AKS 84 |
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