MK3723 Datasheet, PDF (1/4 Pages) Integrated Circuit Systems – Low Cost 3.3 Volt VCXO

PRELIMINARY INFORMATION
MK3723
I CR O C LOC K
Low Cost 3.3 Volt VCXO
Description
The MK3723 is ICS/MicroClock’s lowest cost,
low jitter, high performance 3.3 volt VCXO
designed to replace expensive VCXO modules.
The on-chip Voltage Controlled Crystal Oscillator
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 techniques,
the device uses an inexpensive external pullable
crystal in the range of 16 - 28 MHz to produce a
VCXO output clock that is a divide by 2, 4, 6, or
8 or the crystal frequency.
ICS/MicroClock manufactures the largest variety
of Set-Top Box and multimedia clock synthesizers
for all applications. If more clock outputs are
needed, see the MK3732 or MK377x family of
parts. Consult ICS/MicroClock to eliminate
VCXOs, crystals and oscillators from your board.
Features
• Packaged in 8 pin SOIC
• 3.3 V only operating voltage
• 2 MHz to 14 MHz VCXO operation
• Ideal for 26 MHz from a 28 MHz crystal
• Uses an inexpensive external crystal
• On-chip VCXO (patented) with pull range of
200 ppm (minimum)
• VCXO tuning voltage of 0 to 3.3 V
• 12 mA output drive capability at TTL levels
• Advanced, low power, sub-micron CMOS process
• For frequencies between 16.2 MHz and 28 MHz
use the MK3721S. For higher than 28 MHz, use
the MK3732-05
Block Diagram
VIN
X1
Voltage
16 -28 MHz
pullable crystal
Controlled
Crystal
÷N
Output
Buffer
X2 ^Oscillator
S1, S0
VCXOCLK
MDS 3723 A
1
Revision 082800
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA • 95126• [phone]tel • www.icst.com