FS6128-01

www.DataSheet4U.com FS6128-01 AMERICAN MICROSYSTEMS, INC. PLL Clock Generator IC with VCXO April 2000 1.0 Features 2.0 Description Phase-locked loop (PLL) device synthesizes output clock frequency from crystal oscillator or external reference clock On-chip tunable voltage-controlled crystal oscillator (VCXO) allows precise system frequency tuning Typically used for generation of MPEG-2 decoder clock 3.3V supply voltage Small circuit board footprint (8-pin 0.150″ SOIC) Custom frequency selections available - contact your local AMI Sales Representative for more information Figure 1: Pin Configuration XIN VDD XTUNE VSS 1 8 The FS6128 is a monolithic CMOS clock generator IC designed to minimize cost and component count in digital video/audio systems. At the core of the FS6128 is circuitry that implements a voltage-controlled crystal oscillator when an external resonator (nominally 13.5MHz) is attached. The VCXO allows device frequencies to be precisely adjusted for use in systems that have frequency matching requirements, such as digital satellite receivers. A high-resolution phase-locked loop generates an output clock (CLK) through a post-divider. The CLK frequency is ratiometrically derived from the VCXO frequency. The locking of the CLK frequency to other system reference frequencies can eliminate unpredictable artifacts in video systems and reduce electromagnetic interference (EMI) due to frequency harmonic stacking. XOUT VSS n/c CLK Table 1: Crystal ...