I C R O
C
LOC K
Description
The MK3754 is ICS/Microclock’s lowest cost, low
jitter, high performance 3.3 Volt VCXO and PLL
clock synthesizer designed to replace expensive
54 MHz VCXOs. The on-chip Voltage Controlled
Crystal Oscillator accepts a 0 to 3.3 V input voltage
to vary the output clocks by ±100 ppm. Using
ICS/Microclock’s patented VCXO and
analog/digital Phase-Locked Loop (PLL)
techniques, the device uses an inexpensive external
13.5 MHz pullable crystal input to produce a
54 MHz output clock.
The MK3754A is a drop-in replacement to the
earlier MK3754S.
MK3754
Low Cost 54 MHz 3.3 Volt VCXO
Features
• Packaged in 8 pin SOIC
• 3.3 V only operating voltage
• Uses an inexpensive 13.500 MHz external crystal
• On-chip VCXO (patented) with pull range of
200ppm (minimum)
• VCXO tuning voltage of 0 to 3.3 V
• 12mA output drive capability at TTL levels
• Advanced, low power, sub-micron CMOS process
• The A version is the latest, manufactured in a
smaller geometry process. The MK3754A gives a
wider pull range than the MK3754S, and so is
recommended for all new designs, and cost
reductions of existing designs.
Block Diagram
VIN
X1
13.5 MHz
pullable
crystal
X2
Voltage
Controlled
Crystal
Oscillator
PLL/Clock
Synthesis
Circuitry
Output
Buffer
54MHz
1
Revision 060100
Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408) 295-9800 tel • www.icst.com
MDS 3754 D
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
