MK3732-08

ADSL Clock Source

MDS 3732-08 C

1

Revision 091201

Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408) 295-9800 tel • (408) 295-9818 fax • www.icst.com

Block Diagram

Description

Features

The MK3732-08 is a low cost, low jitter, high

performance VCXO and PLL clock synthesizer

designed to replace expensive discrete VCXOs and

multipliers. The on-chip Voltage Controlled Crystal

Oscillator (VCXO) accepts a 0 to 3.3 V input voltage to

cause the output clocks to vary by ±100 ppm. Using

ICS/MicroClock’s patented VCXO and analog/digital

Phase-Locked Loop (PLL) techniques, the device

uses an inexpensive 17.664 MHz or 24.576 MHz

pullable crystal input to produce one or two output

clocks.

ICS manufactures the largest variety of xDSL clock

synthesizers for all applications. Consult ICS to

eliminate VCXOs, crystals and oscillators from your

board.

• Packaged in 20 pin SSOP (QSOP)

• Replaces a VCXO and oscillator

• Uses an inexpensive pullable crystal

• On-chip patented VCXO with pull range of

230 ppm (±115 ppm) minimum

• VCXO tuning voltage of 0 to 3.3 V

• Advanced, low power, sub-micron CMOS process

• 3.3V operating voltage

• Available in industrial temperature range

Voltage

Controlled

Crystal

Oscillator

PLL/Clock

Synthesis

Circuitry

CLK1

17.664 MHz

or 24.576 MHz

pullable

crystal

X1

X2

VIN

Output

Buffer

CLK2

Output

Buffer

VDD

OE

S2:S0

3

GND

Output

Buffer

REF

REFEN

PD