11640-823 查看數據表（PDF） - AMI Semiconductor

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11640-823

VCXO Clock Generator IC

AMI Semiconductor 

FS6146

VCXO Clock Generator IC

1.0 Features

• On-chip tunable voltage-controlled crystal oscillator

circuitry (VCXO) allows precise system frequency

tuning (pull range typically 300ppm)

• 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 (8-pin 0.150″ SOIC)

• Custom frequency selections available - contact your

local AMI Sales Representative for more information

2.0 Description

The FS6146 is a monolithic CMOS clock generator IC

designed to minimize cost and component count in digital

video/audio systems.

At the core of the FS6146 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.

Figure 1: Pin Configuration

XIN 1

XOUT 2

VDD 3

XTUNE 4

VSS 5

n/c 6

OE 7

CLKA 8

16 n/c

15 n/c

14 n/c

13 VDDO

12 VSS

11 CLKB

10 n/c

9 n/c

16-pin (0.150″) SOIC

Figure 2: Block Diagram

Table 1: Crystal / Output Frequencies

DEVICE

FS6146-01

fXIN (MHz)

10.000

CLKA (MHz)

40.000

CLKB (MHz)

80.000

NOTE: Contact AMI for custom PLL frequencies

XIN

XOUT

XTUNE

VCXO

PLL

Divider

Array

CLKA

CLKB

FS6146

This document contains information on a preproduction product. Specifications and information herein are subject to change without notice.

ISO9001

2.27.02

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