FS6128-01 Datasheet, PDF (1/7 Pages) List of Unclassifed Manufacturers – PLL Clock Generator IC with VCXO

AMERICAN MICROSYSTEMS, INC.
FS6128-01
PLL Clock Generator IC with VCXO
April 2000
1.0 Features
• Phase-locked loop (PLL) device synthesizes output
clock frequency from crystal oscillator or external ref-
erence 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
2.0 Description
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.
XIN ¹
VDD ²
XTUNE ³
VSS ⁴
8 _XOUT
7 _VSS
6 _n/c
5 _CLK
Table 1: Crystal / Output Frequencies
DEVICE
fXIN (MHz)
CLK (MHz)
FS6128-01
13.5
27
NOTE: Contact AMI for custom PLL frequencies
XTUNE Range
0-2 V
8-pin (0.150″ ) SOIC
Figure 2: Block Diagram
XIN
XOUT
XTUNE
VCXO
ISO9001
PLL
DIVIDER
CLK
FS6128
4.24.00