FS6132
AMERICAN MICROSYSTEMS, INC.
VCXO Clock Generator IC
Preliminary
January 2000
1.0
•
Features
2.0
Description
On-chip tunable voltage-controlled crystal oscillator
circuitry (VCXO) allows precise system frequency
tuning (pull range typically +/-150 ppm)
VCXO tuning range: 0-3V
Uses inexpensive fundamental-mode crystals
Integrated phase-locked loop (PLL) multiplies VCXO
frequency to the higher system frequencies needed
5V core supply voltage (contact factory for 3.3V)
3.3V / 5V output supply voltage
Small circuit board footprint
16-pin 5.3mm (0.209”) SSOP
Custom frequency selections available - contact your
local AMI Sales Representative for more information
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The FS6132 is a monolithic CMOS clock generator IC
designed to minimize cost and component count in digital
video/audio systems.
At the core of the FS6132 is circuitry that implements a
voltage-controlled crystal oscillator when an external
resonator is attached. The VCXO allows device frequen-
cies 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 the output
clock frequencies (CLKA and CLKB). These frequencies
are phase-locked and frequency-locked to the VCXO fre-
quency.
Table 1: Crystal / Output Frequencies
Figure 1: Pin Configuration
XIN
VDD
VDD
XTUNE
GND
n/c
n/c
OE
1
2
3
16
15
14
DEVICE
f
XIN
(MHz)
13.5
CLKA (MHz)
54.000
CLKB (MHz)
27.000
XOUT
n/c
n/c
GND
CLKB
VDDO
n/c
CLKA
FS6132-01
NOTE: Contact AMI for custom PLL frequencies
FS6132
4
5
6
7
8
13
12
11
10
9
16-pin SSOP (5.3mm)
Figure 2: Block Diagram
XIN
VCXO
XOUT
XTUNE
Phase
Frequency
Detector
Charge
Pump
Loop
Filter
Voltage
Controlled
Oscillator
OE
CLKA
Feedback
Divider
Divider
Array
CLKB
FS6132
This document contains information on a preproduction product. Specifications and information herein are subject to change without notice.
ISO9001
1.24.00
AMI [ AMI SEMICONDUCTOR ]
