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