MK3732-08
ADSL Clock Source
Description
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.
Features
• 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
Block Diagram
VDD
GND
S2:S0
REFEN
PD
VIN
X1
3
Output
Buffer
Output
Buffer
CLK1
PLL/Clock
Synthesis
Circuitry
Voltage
Controlled
Crystal
Oscillator
CLK2
17.664 MHz
or 24.576 MHz
pullable
crystal
Output
Buffer
REF
X2
OE
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
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
