OVERVIEW
The SM9403BM is a DVDROM and DVDRAM servo preprocessor LSI, designed for double-speed format DVDROM and DVDRAM drives.
The SM9403BM is fabricated using a BiCMOS process, and incorporates an analog signal processing circuit that generates signals needed by the digital servo processor, a DPD signal processing circuit (DVDROM), and a CAPA (Complementary Allocated Pit Address) detection circuit (DVDRAM) all in a single chip. It operates from a single 5 V supply, and is available in 36-pin plastic SSOP packages.

FEATURES
■ DPD signal processor
■ Tracking error signal output
■ Focus error signal output
■ Tracking error signal sample-and-hold
■ Focus error signal sample-and-hold
■ CAPA detection function
■ Track count pulse generator
■ Off-track detection
■ 2V and 4V reference voltage generator
■ Serial interface for setting internal parameters
■ Sleep-mode function
■ Single 5 V supply
■ 36-pin plastic SSOP

APPLICATIONS
■ Double-speed DVDROM drives
■ Double-speed DVDRAM drives