OVERVIEW

The SM8703CV is a 27MHz master clock, 5-system output clock generator for DVD players. It has 2 built-in PLLs that, with the addition of a single crystal oscillator element, can generate 384fs, 512fs and 768fs clocks which are necessary for MPEG2 systems, plus independent fixed-frequency 27MHz and 33.8688MHz output clocks. Each output has an output disable function, when the output is not used, to suppress unwanted radiation. Also, the normal output frequency ratio between each output is maintained so that the visual and audio signals remain synchronized. Supported sampling frequencies (fs) include 44.1 and 48kHz.

FEATURES

■ 27MHz master clock (internal PLL reference clock)

■ Generated clocks

• 27MHz output

• 33.8688MHz output

• 384fs output

• 512fs output

• 768fs output

■ Sampling frequency fs

• 44.1/48kHz

■ Output disable function

■ Low jitter output: 100ps (typ, 15pF load)

■ Supply voltage: 3.3V

■ 24-pin VSOP package

APPLICATIONS

■ DVD players

■ Set-top boxes

■ MPEG2 systems